[Feature] Aggiunto supporto completo OLE DB per connessione database
## Nuovi file - DataConnection/DB/OleDbDatabaseManager.cs: Manager completo per connessioni OLE DB con supporto Task.Run() per operazioni sincrone, parametri posizionali '?', guard per piattaforma Windows, nessun supporto ChangeDatabaseAsync (no-op) - DataConnection/DB/EF/SchemaProviders/OleDbSchemaProvider.cs: Schema provider per OLE DB, usa OleDbSchemaGuid per tabelle/colonne/chiavi primarie, mapping tipi dati - CredentialManager/Services/OleDbProviderDiscoveryService.cs: Servizio di discovery provider OLE DB installati tramite registro Windows (HKEY_CLASSES_ROOT). Rileva 9 provider noti: VFPOLEDB.1, Microsoft.ACE.OLEDB.12.0, Jet 4.0, SQLOLEDB, ecc. Mostra warning per provider solo 32-bit (VFPOLEDB, Jet) - PUBLISH_32BIT_64BIT.md: Documentazione completa comandi pubblicazione per win-x64, win-x86 (richiesto per VFP), linux-x64, osx-x64, osx-arm64. Include prerequisiti VFPOLEDB, esempi connection string VFP, note Docker ## File modificati - DataConnection/DB/Enums/DatabaseType.cs: Aggiunto valore OleDb dopo Odbc - DataConnection/DataConnection.csproj: Aggiunto pacchetto System.Data.OleDb 9.0.3 - DataConnection/DB/OdbcDatabaseManager.cs: Fix bug ChangeDatabaseAsync con try-catch - CredentialManager/Models/CredentialModels.cs: Aggiunto OleDb all'enum DatabaseType, BuildOleDbConnectionString() con supporto provider da AdditionalParameters, default VFPOLEDB.1, costruzione connection string con parametri VFP - DataConnection/CredentialManagement/Models/CredentialExtensions.cs: Mappatura OleDb in ToDataConnectionDatabaseType() e ToCredentialDatabaseType() - DataConnection/CredentialManagement/Services/DataConnectionCredentialService.cs: Aggiunto case OleDb in TestDatabaseConnectionAsync e metodo TestOleDbConnection() con apertura connessione via Task.Run() e gestione OleDbException dettagliata - Data_Coupler/Services/DataConnectionFactory.cs: Aggiunto case OleDb per creazione OleDbDatabaseManager - Data_Coupler/Program.cs: Registrazione IOleDbProviderDiscoveryService come Scoped - Data_Coupler/Pages/CredentialManagement.razor: Aggiunta UI completa OLE DB con sezione dedicata Visual FoxPro (percorso .dbc/.dbf, Collating Sequence, DELETED), provider discovery con refresh, anteprima connection string, variabili di stato e metodi nel codice Blazor, sincronizzazione AdditionalParameters al salvataggio ## Compatibilità - VFP 8.0/9.0: testato con VFPOLEDB.1, connessione file-based .dbc e .dbf - Richiede pubblicazione win-x86 per driver OLE DB 32-bit - AnyCPU non supportato per VFP (COM 32-bit)
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Data.OleDb;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Threading.Tasks;
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using DataConnection.Interfaces;
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namespace DataConnection.EF.SchemaProviders;
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/// <summary>
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/// Provider di schema per database OLE DB (incluso Visual FoxPro)
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/// Utilizza GetOleDbSchemaTable per ottenere metadati in modo compatibile con VFP e altri provider OLE DB
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/// </summary>
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public class OleDbSchemaProvider : IDatabaseSchemaProvider
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{
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public async Task<IDictionary<string, IEnumerable<DbColumnInfo>>> GetDatabaseSchemaAsync(string connectionString)
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{
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var result = new Dictionary<string, IEnumerable<DbColumnInfo>>();
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if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
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throw new PlatformNotSupportedException("OLE DB è supportato solo su Windows.");
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try
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{
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using var connection = new OleDbConnection(connectionString);
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await Task.Run(() => connection.Open());
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Console.WriteLine($"OLE DB Schema Provider - Provider: {connection.Provider}");
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var tableNames = GetTableNamesFromConnection(connection);
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Console.WriteLine($"Trovate {tableNames.Count} tabelle");
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foreach (var tableName in tableNames)
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{
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try
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{
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var columns = GetTableColumnsFromConnection(connection, tableName);
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if (columns.Any())
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{
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result[tableName] = columns;
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Console.WriteLine($"Tabella {tableName}: {columns.Count()} colonne");
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}
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}
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catch (Exception ex)
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{
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Console.WriteLine($"Errore nel leggere le colonne della tabella {tableName}: {ex.Message}");
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}
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}
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}
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catch (Exception ex)
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{
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Console.WriteLine($"Errore in OleDbSchemaProvider.GetDatabaseSchemaAsync: {ex.Message}");
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throw;
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}
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return result;
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}
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public async Task<IEnumerable<string>> GetTableNamesAsync(string connectionString)
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{
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if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
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return Enumerable.Empty<string>();
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try
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{
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using var connection = new OleDbConnection(connectionString);
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await Task.Run(() => connection.Open());
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return GetTableNamesFromConnection(connection);
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}
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catch (Exception ex)
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{
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Console.WriteLine($"Errore in OleDbSchemaProvider.GetTableNamesAsync: {ex.Message}");
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return Enumerable.Empty<string>();
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}
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}
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public async Task<IEnumerable<DbColumnInfo>> GetTableSchemaAsync(string connectionString, string tableName)
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{
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if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
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return Enumerable.Empty<DbColumnInfo>();
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try
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{
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using var connection = new OleDbConnection(connectionString);
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await Task.Run(() => connection.Open());
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return GetTableColumnsFromConnection(connection, tableName);
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}
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catch (Exception ex)
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{
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Console.WriteLine($"Errore in OleDbSchemaProvider.GetTableSchemaAsync per {tableName}: {ex.Message}");
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return Enumerable.Empty<DbColumnInfo>();
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}
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}
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public async Task<IEnumerable<string>> GetAvailableDatabasesAsync(string connectionString)
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{
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// OLE DB file-based (VFP, Access) non supporta listing di database multipli
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try
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{
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using var connection = new OleDbConnection(connectionString);
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await Task.Run(() => connection.Open());
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var db = connection.Database;
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return string.IsNullOrEmpty(db) ? Enumerable.Empty<string>() : new[] { db };
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}
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catch
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{
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return Enumerable.Empty<string>();
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}
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}
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private static List<string> GetTableNamesFromConnection(OleDbConnection connection)
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{
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var tableNames = new List<string>();
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try
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{
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// Usa GetOleDbSchemaTable - più compatibile con VFP rispetto a GetSchema()
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var restrictions = new object?[] { null, null, null, "TABLE" };
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var tablesSchema = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, restrictions);
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if (tablesSchema != null)
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{
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foreach (DataRow row in tablesSchema.Rows)
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{
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var tableName = row["TABLE_NAME"]?.ToString();
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if (!string.IsNullOrEmpty(tableName))
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tableNames.Add(tableName);
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}
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}
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}
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catch (Exception ex)
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{
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Console.WriteLine($"GetOleDbSchemaTable Tables fallito, tentativo con GetSchema: {ex.Message}");
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// Fallback a GetSchema per provider che non supportano GetOleDbSchemaTable
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try
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{
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var tablesSchema = connection.GetSchema("Tables");
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tableNames = tablesSchema.AsEnumerable()
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.Where(row =>
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{
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var t = row["TABLE_TYPE"]?.ToString();
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return t == "TABLE" || t == "BASE TABLE";
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})
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.Select(row => row["TABLE_NAME"]?.ToString() ?? string.Empty)
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.Where(n => !string.IsNullOrEmpty(n))
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.ToList();
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}
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catch (Exception ex2)
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{
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Console.WriteLine($"GetSchema Tables fallito anche: {ex2.Message}");
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}
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}
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return tableNames.OrderBy(t => t).ToList();
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}
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private static List<DbColumnInfo> GetTableColumnsFromConnection(OleDbConnection connection, string tableName)
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{
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var columns = new List<DbColumnInfo>();
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try
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{
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// Ottieni primary keys
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var primaryKeys = GetPrimaryKeys(connection, tableName);
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// Ottieni colonne via GetOleDbSchemaTable
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var restrictions = new object?[] { null, null, tableName, null };
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var columnsSchema = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, restrictions);
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if (columnsSchema == null)
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return columns;
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// Ordina per posizione ordinale
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var rows = columnsSchema.AsEnumerable()
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.OrderBy(r => r.IsNull("ORDINAL_POSITION") ? 0 : Convert.ToInt32(r["ORDINAL_POSITION"]))
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.ToList();
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foreach (DataRow row in rows)
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{
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var columnName = row["COLUMN_NAME"]?.ToString();
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if (string.IsNullOrEmpty(columnName))
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continue;
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// DATA_TYPE è un int (OleDbType enum value)
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int oleDbTypeInt = row.IsNull("DATA_TYPE") ? 0 : Convert.ToInt32(row["DATA_TYPE"]);
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var dataType = MapOleDbTypeToString(oleDbTypeInt);
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// Formato con dimensioni
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var columnSize = row.IsNull("CHARACTER_MAXIMUM_LENGTH") ? 0 : Convert.ToInt32(row["CHARACTER_MAXIMUM_LENGTH"]);
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var numericPrecision = row.IsNull("NUMERIC_PRECISION") ? 0 : Convert.ToInt32(row["NUMERIC_PRECISION"]);
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var numericScale = row.IsNull("NUMERIC_SCALE") ? 0 : Convert.ToInt32(row["NUMERIC_SCALE"]);
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var formattedType = FormatDataType(dataType, columnSize, numericPrecision, numericScale);
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bool isNullable = true;
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if (!row.IsNull("IS_NULLABLE"))
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isNullable = Convert.ToBoolean(row["IS_NULLABLE"]);
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columns.Add(new DbColumnInfo
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{
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Name = columnName,
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DataType = formattedType,
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IsNullable = isNullable,
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IsPrimaryKey = primaryKeys.Contains(columnName, StringComparer.OrdinalIgnoreCase)
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});
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}
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}
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catch (Exception ex)
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{
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Console.WriteLine($"Errore nel recuperare le colonne per {tableName}: {ex.Message}");
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}
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return columns;
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}
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private static HashSet<string> GetPrimaryKeys(OleDbConnection connection, string tableName)
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{
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var primaryKeys = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
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try
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{
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var restrictions = new object?[] { null, null, tableName };
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var pkSchema = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Primary_Keys, restrictions);
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if (pkSchema != null)
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{
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foreach (DataRow row in pkSchema.Rows)
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{
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var col = row["COLUMN_NAME"]?.ToString();
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if (!string.IsNullOrEmpty(col))
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primaryKeys.Add(col);
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}
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}
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}
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catch (Exception ex)
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{
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Console.WriteLine($"Primary keys non disponibili per {tableName}: {ex.Message}");
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// Fallback: prova con Indexes
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try
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{
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var restrictions = new object?[] { null, null, null, null, tableName };
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var idxSchema = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Indexes, restrictions);
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if (idxSchema != null)
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{
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foreach (DataRow row in idxSchema.Rows)
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{
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if (row["PRIMARY_KEY"] is bool pk && pk)
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{
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var col = row["COLUMN_NAME"]?.ToString();
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if (!string.IsNullOrEmpty(col))
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primaryKeys.Add(col);
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}
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}
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}
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}
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catch { /* Se anche questo fallisce, ignora */ }
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}
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return primaryKeys;
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}
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private static string MapOleDbTypeToString(int oleDbTypeInt)
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{
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// Mappa OleDbType enum (int) a nome leggibile
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// https://learn.microsoft.com/en-us/dotnet/api/system.data.oledb.oledbtype
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return oleDbTypeInt switch
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{
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2 => "SmallInt",
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3 => "Integer",
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4 => "Single",
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5 => "Double",
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6 => "Currency",
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7 => "Date",
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8 => "VarChar", // BSTR
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9 => "IDispatch",
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10 => "Error",
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11 => "Boolean",
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12 => "Variant",
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13 => "IUnknown",
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14 => "Decimal",
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16 => "TinyInt",
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17 => "UnsignedTinyInt",
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18 => "UnsignedSmallInt",
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19 => "UnsignedInt",
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20 => "BigInt",
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21 => "UnsignedBigInt",
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64 => "DateTime",
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65 => "FileTime",
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72 => "Guid",
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128 => "Binary",
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129 => "Char",
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130 => "NVarChar", // WChar
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131 => "Decimal", // Numeric
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132 => "UserDefined",
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133 => "Date",
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134 => "Time",
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135 => "DateTime", // DBTimeStamp
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136 => "Variant", // Chapter
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138 => "PropVariant",
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139 => "VarNumeric",
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200 => "VarChar",
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201 => "LongVarChar",
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202 => "NVarChar", // VarWChar
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203 => "NText", // LongVarWChar
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204 => "VarBinary",
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205 => "Image", // LongVarBinary
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_ => $"Type({oleDbTypeInt})"
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};
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}
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private static string FormatDataType(string dataType, int columnSize, int numericPrecision, int numericScale)
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{
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var upper = dataType.ToUpperInvariant();
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if (upper.Contains("DECIMAL") || upper.Contains("NUMERIC"))
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{
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if (numericPrecision > 0)
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return $"{dataType}({numericPrecision},{numericScale})";
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}
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else if (upper.Contains("CHAR") || upper.Contains("VARCHAR") || upper.Contains("TEXT") || upper.Contains("BINARY"))
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{
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if (columnSize > 0 && columnSize < 8000)
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return $"{dataType}({columnSize})";
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else if (columnSize >= 8000)
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return $"{dataType}(MAX)";
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}
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return dataType;
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}
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}
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@@ -12,5 +12,6 @@ public enum DatabaseType
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Sqlite,
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DB2,
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SapHana,
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Odbc
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Odbc,
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OleDb
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}
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@@ -66,11 +66,19 @@ public class OdbcDatabaseManager : IDatabaseManager
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using var connection = new OdbcConnection(_connectionString);
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await connection.OpenAsync();
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// Cambia database se specificato
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// Cambia database se specificato (alcuni driver come VFP non supportano ChangeDatabaseAsync)
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if (!string.IsNullOrEmpty(databaseName) && databaseName != _currentDatabase)
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{
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await connection.ChangeDatabaseAsync(databaseName);
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_currentDatabase = databaseName;
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try
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{
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await connection.ChangeDatabaseAsync(databaseName);
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_currentDatabase = databaseName;
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}
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catch (Exception dbChangeEx)
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{
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Console.WriteLine($"[ODBC] ChangeDatabaseAsync non supportato dal driver ({databaseName}): {dbChangeEx.Message}");
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// Continua senza cambiare database (es. driver file-based come VFP)
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}
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}
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using var command = new OdbcCommand(sql, connection);
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@@ -0,0 +1,379 @@
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Data.OleDb;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Runtime.InteropServices;
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using System.Threading.Tasks;
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using DataConnection.EF.SchemaProviders;
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using DataConnection.Interfaces;
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namespace DataConnection.DB;
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/// <summary>
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/// Database manager per connessioni OLE DB dirette (es. Visual FoxPro, Access, Jet)
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/// Nota: i driver OLE DB come VFPOLEDB.1 sono 32-bit only — pubblicare con --runtime win-x86 se necessario
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/// </summary>
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public class OleDbDatabaseManager : IDatabaseManager
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{
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private readonly string _connectionString;
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private readonly OleDbSchemaProvider _schemaProvider;
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public OleDbDatabaseManager(string connectionString)
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{
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if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
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throw new PlatformNotSupportedException("OLE DB è supportato solo su Windows.");
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_connectionString = connectionString ?? throw new ArgumentNullException(nameof(connectionString));
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_schemaProvider = new OleDbSchemaProvider();
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}
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public async Task<bool> TestConnectionAsync()
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{
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try
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{
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using var connection = new OleDbConnection(_connectionString);
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await Task.Run(() => connection.Open());
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return true;
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}
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catch
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{
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return false;
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}
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}
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public Task<IEnumerable<T>> GetAsync<T>(
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Expression<Func<T, bool>>? filter = null,
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Func<IQueryable<T>, IOrderedQueryable<T>>? orderBy = null,
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string includeProperties = "",
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int? skip = null,
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int? take = null) where T : class
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{
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throw new NotSupportedException("GetAsync<T> con espressioni LINQ non è supportato per OLE DB. Usare ExecuteRawQueryAsync.");
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}
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public Task<T?> GetByIdAsync<T>(object id) where T : class
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{
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throw new NotSupportedException("GetByIdAsync<T> non è supportato per OLE DB. Usare ExecuteRawQueryAsync con clausola WHERE.");
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}
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public Task<IEnumerable<T>> ExecuteQueryAsync<T>(string sql, params object[] parameters) where T : class
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{
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throw new NotSupportedException("ExecuteQueryAsync<T> non è supportato per OLE DB. Usare ExecuteRawQueryAsync.");
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}
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public async Task<List<Dictionary<string, object>>> ExecuteRawQueryAsync(string sql, string databaseName = "", params object[] parameters)
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{
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var results = new List<Dictionary<string, object>>();
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using var connection = new OleDbConnection(_connectionString);
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await Task.Run(() => connection.Open());
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// OLE DB file-based (VFP, Access) non supporta ChangeDatabaseAsync — il database è nel Data Source
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// Ignoriamo databaseName per questa tipologia di provider
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using var command = new OleDbCommand(sql, connection);
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if (parameters != null && parameters.Length > 0)
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{
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for (int i = 0; i < parameters.Length; i++)
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{
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command.Parameters.Add(new OleDbParameter($"@p{i}", parameters[i] ?? DBNull.Value));
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}
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}
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|
||||
using var reader = await Task.Run(() => command.ExecuteReader());
|
||||
|
||||
while (reader.Read())
|
||||
{
|
||||
var row = new Dictionary<string, object>();
|
||||
for (int i = 0; i < reader.FieldCount; i++)
|
||||
{
|
||||
var fieldName = reader.GetName(i);
|
||||
var value = reader.IsDBNull(i) ? DBNull.Value : reader.GetValue(i);
|
||||
row[fieldName] = value;
|
||||
}
|
||||
results.Add(row);
|
||||
}
|
||||
|
||||
return results;
|
||||
}
|
||||
|
||||
public async Task<int> ExecuteCommandAsync(string sql, params object[] parameters)
|
||||
{
|
||||
using var connection = new OleDbConnection(_connectionString);
|
||||
await Task.Run(() => connection.Open());
|
||||
|
||||
using var command = new OleDbCommand(sql, connection);
|
||||
|
||||
if (parameters != null && parameters.Length > 0)
|
||||
{
|
||||
for (int i = 0; i < parameters.Length; i++)
|
||||
{
|
||||
command.Parameters.Add(new OleDbParameter($"@p{i}", parameters[i] ?? DBNull.Value));
|
||||
}
|
||||
}
|
||||
|
||||
return await Task.Run(() => command.ExecuteNonQuery());
|
||||
}
|
||||
|
||||
public async Task<List<string>> GetAvailableDatabasesAsync()
|
||||
{
|
||||
var databases = await _schemaProvider.GetAvailableDatabasesAsync(_connectionString);
|
||||
return databases.ToList();
|
||||
}
|
||||
|
||||
public async Task ChangeDatabaseAsync(string databaseName)
|
||||
{
|
||||
// I provider OLE DB file-based (VFP, Access) non supportano il cambio di database a runtime
|
||||
// Il Data Source nella connection string definisce il database
|
||||
Console.WriteLine($"[OleDb] ChangeDatabaseAsync ignorato per provider file-based (database: {databaseName})");
|
||||
await Task.CompletedTask;
|
||||
}
|
||||
|
||||
public async Task<IDictionary<string, IEnumerable<DbColumnInfo>>> GetDatabaseSchemaAsync()
|
||||
{
|
||||
return await _schemaProvider.GetDatabaseSchemaAsync(_connectionString);
|
||||
}
|
||||
|
||||
public async Task<IEnumerable<string>> GetTableNamesAsync()
|
||||
{
|
||||
return await _schemaProvider.GetTableNamesAsync(_connectionString);
|
||||
}
|
||||
|
||||
public async Task<IEnumerable<DbColumnInfo>> GetTableSchemaAsync(string tableName)
|
||||
{
|
||||
return await _schemaProvider.GetTableSchemaAsync(_connectionString, tableName);
|
||||
}
|
||||
|
||||
public async Task<IEnumerable<Dictionary<string, object>>> GetAllRecordsAsync(string tableName)
|
||||
{
|
||||
var query = $"SELECT * FROM {tableName}";
|
||||
return await ExecuteRawQueryAsync(query);
|
||||
}
|
||||
|
||||
public async Task<string?> GetPrimaryKeyFieldAsync(string tableName)
|
||||
{
|
||||
try
|
||||
{
|
||||
var schema = await GetTableSchemaAsync(tableName);
|
||||
var pkColumn = schema.FirstOrDefault(c => c.IsPrimaryKey);
|
||||
return pkColumn?.Name;
|
||||
}
|
||||
catch
|
||||
{
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
public async Task<IEnumerable<IDictionary<string, object?>>> ExecuteQueryAsync(string query, int? maxRows = null)
|
||||
{
|
||||
var results = new List<IDictionary<string, object?>>();
|
||||
|
||||
using var connection = new OleDbConnection(_connectionString);
|
||||
await Task.Run(() => connection.Open());
|
||||
|
||||
var commandText = maxRows.HasValue ? WrapQueryWithLimit(query, maxRows.Value) : query;
|
||||
using var command = new OleDbCommand(commandText, connection);
|
||||
|
||||
using var reader = await Task.Run(() => command.ExecuteReader());
|
||||
|
||||
while (reader.Read())
|
||||
{
|
||||
var row = new Dictionary<string, object?>();
|
||||
for (int i = 0; i < reader.FieldCount; i++)
|
||||
{
|
||||
var fieldName = reader.GetName(i);
|
||||
var value = reader.IsDBNull(i) ? null : reader.GetValue(i);
|
||||
row[fieldName] = value;
|
||||
}
|
||||
results.Add(row);
|
||||
}
|
||||
|
||||
return results;
|
||||
}
|
||||
|
||||
public async Task<int> ExecuteNonQueryAsync(string query)
|
||||
{
|
||||
using var connection = new OleDbConnection(_connectionString);
|
||||
await Task.Run(() => connection.Open());
|
||||
|
||||
using var command = new OleDbCommand(query, connection);
|
||||
return await Task.Run(() => command.ExecuteNonQuery());
|
||||
}
|
||||
|
||||
public async Task<object?> ExecuteScalarAsync(string query)
|
||||
{
|
||||
using var connection = new OleDbConnection(_connectionString);
|
||||
await Task.Run(() => connection.Open());
|
||||
|
||||
using var command = new OleDbCommand(query, connection);
|
||||
return await Task.Run(() => command.ExecuteScalar());
|
||||
}
|
||||
|
||||
public async Task<int> InsertAsync(string tableName, IDictionary<string, object?> data)
|
||||
{
|
||||
var columns = string.Join(", ", data.Keys.Select(k => $"[{k}]"));
|
||||
var parameters = string.Join(", ", data.Keys.Select(_ => "?"));
|
||||
|
||||
var query = $"INSERT INTO {tableName} ({columns}) VALUES ({parameters})";
|
||||
|
||||
using var connection = new OleDbConnection(_connectionString);
|
||||
await Task.Run(() => connection.Open());
|
||||
|
||||
using var command = new OleDbCommand(query, connection);
|
||||
|
||||
foreach (var value in data.Values)
|
||||
command.Parameters.Add(new OleDbParameter { Value = value ?? DBNull.Value });
|
||||
|
||||
return await Task.Run(() => command.ExecuteNonQuery());
|
||||
}
|
||||
|
||||
public async Task<int> UpdateAsync(string tableName, IDictionary<string, object?> data, IDictionary<string, object?> whereClause)
|
||||
{
|
||||
var setClause = string.Join(", ", data.Keys.Select(k => $"[{k}] = ?"));
|
||||
var whereConditions = string.Join(" AND ", whereClause.Keys.Select(k => $"[{k}] = ?"));
|
||||
|
||||
var query = $"UPDATE {tableName} SET {setClause} WHERE {whereConditions}";
|
||||
|
||||
using var connection = new OleDbConnection(_connectionString);
|
||||
await Task.Run(() => connection.Open());
|
||||
|
||||
using var command = new OleDbCommand(query, connection);
|
||||
|
||||
foreach (var value in data.Values)
|
||||
command.Parameters.Add(new OleDbParameter { Value = value ?? DBNull.Value });
|
||||
|
||||
foreach (var value in whereClause.Values)
|
||||
command.Parameters.Add(new OleDbParameter { Value = value ?? DBNull.Value });
|
||||
|
||||
return await Task.Run(() => command.ExecuteNonQuery());
|
||||
}
|
||||
|
||||
public async Task<int> DeleteAsync(string tableName, IDictionary<string, object?> whereClause)
|
||||
{
|
||||
var whereConditions = string.Join(" AND ", whereClause.Keys.Select(k => $"[{k}] = ?"));
|
||||
var query = $"DELETE FROM {tableName} WHERE {whereConditions}";
|
||||
|
||||
using var connection = new OleDbConnection(_connectionString);
|
||||
await Task.Run(() => connection.Open());
|
||||
|
||||
using var command = new OleDbCommand(query, connection);
|
||||
|
||||
foreach (var value in whereClause.Values)
|
||||
command.Parameters.Add(new OleDbParameter { Value = value ?? DBNull.Value });
|
||||
|
||||
return await Task.Run(() => command.ExecuteNonQuery());
|
||||
}
|
||||
|
||||
public async Task<int> BulkInsertAsync(string tableName, IEnumerable<IDictionary<string, object?>> dataList)
|
||||
{
|
||||
int totalInserted = 0;
|
||||
|
||||
using var connection = new OleDbConnection(_connectionString);
|
||||
await Task.Run(() => connection.Open());
|
||||
|
||||
using var transaction = connection.BeginTransaction();
|
||||
|
||||
try
|
||||
{
|
||||
foreach (var data in dataList)
|
||||
{
|
||||
var columns = string.Join(", ", data.Keys.Select(k => $"[{k}]"));
|
||||
var parameters = string.Join(", ", data.Keys.Select(_ => "?"));
|
||||
|
||||
var query = $"INSERT INTO {tableName} ({columns}) VALUES ({parameters})";
|
||||
|
||||
using var command = new OleDbCommand(query, connection, transaction);
|
||||
|
||||
foreach (var value in data.Values)
|
||||
command.Parameters.Add(new OleDbParameter { Value = value ?? DBNull.Value });
|
||||
|
||||
totalInserted += await Task.Run(() => command.ExecuteNonQuery());
|
||||
}
|
||||
|
||||
transaction.Commit();
|
||||
}
|
||||
catch
|
||||
{
|
||||
transaction.Rollback();
|
||||
throw;
|
||||
}
|
||||
|
||||
return totalInserted;
|
||||
}
|
||||
|
||||
public async Task<bool> UpsertRecordAsync(string tableName, string keyField, object? keyValue, Dictionary<string, object?> record)
|
||||
{
|
||||
try
|
||||
{
|
||||
using var connection = new OleDbConnection(_connectionString);
|
||||
await Task.Run(() => connection.Open());
|
||||
|
||||
using var checkCmd = new OleDbCommand($"SELECT COUNT(*) FROM {tableName} WHERE [{keyField}] = ?", connection);
|
||||
checkCmd.Parameters.Add(new OleDbParameter { Value = keyValue ?? DBNull.Value });
|
||||
|
||||
var countResult = await Task.Run(() => checkCmd.ExecuteScalar());
|
||||
bool exists = Convert.ToInt64(countResult ?? 0L) > 0;
|
||||
|
||||
if (exists)
|
||||
{
|
||||
var fields = record.Keys.ToList();
|
||||
var setClauses = fields.Select(f => $"[{f}] = ?").ToList();
|
||||
var updateSql = $"UPDATE {tableName} SET {string.Join(", ", setClauses)} WHERE [{keyField}] = ?";
|
||||
|
||||
using var updateCmd = new OleDbCommand(updateSql, connection);
|
||||
|
||||
foreach (var f in fields)
|
||||
updateCmd.Parameters.Add(new OleDbParameter { Value = record[f] ?? DBNull.Value });
|
||||
|
||||
updateCmd.Parameters.Add(new OleDbParameter { Value = keyValue ?? DBNull.Value });
|
||||
|
||||
await Task.Run(() => updateCmd.ExecuteNonQuery());
|
||||
}
|
||||
else
|
||||
{
|
||||
var fields = record.Keys.ToList();
|
||||
var fieldNames = string.Join(", ", fields.Select(f => $"[{f}]"));
|
||||
var paramPlaceholders = string.Join(", ", fields.Select(_ => "?"));
|
||||
var insertSql = $"INSERT INTO {tableName} ({fieldNames}) VALUES ({paramPlaceholders})";
|
||||
|
||||
using var insertCmd = new OleDbCommand(insertSql, connection);
|
||||
|
||||
foreach (var f in fields)
|
||||
insertCmd.Parameters.Add(new OleDbParameter { Value = record[f] ?? DBNull.Value });
|
||||
|
||||
await Task.Run(() => insertCmd.ExecuteNonQuery());
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Console.WriteLine($"Errore nell'upsert OLE DB in {tableName}: {ex.Message}");
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// VFP e la maggior parte dei provider OLE DB supportano SELECT TOP N (SQL Server style)
|
||||
/// </summary>
|
||||
private static string WrapQueryWithLimit(string query, int maxRows)
|
||||
{
|
||||
var upperQuery = query.Trim().ToUpperInvariant();
|
||||
|
||||
if (upperQuery.Contains("LIMIT ") || upperQuery.Contains("TOP "))
|
||||
return query;
|
||||
|
||||
if (upperQuery.StartsWith("SELECT "))
|
||||
return query.Insert(7, $"TOP {maxRows} ");
|
||||
|
||||
return $"{query} LIMIT {maxRows}";
|
||||
}
|
||||
|
||||
public void Dispose()
|
||||
{
|
||||
// Nessuna risorsa da rilasciare
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user