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123 lines
3.0 KiB
123 lines
3.0 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using FirebirdSql.Data.FirebirdClient;
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using FireBirdUtil.SqlUtils;
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using System.Diagnostics;
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using System.Data;
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namespace FireBirdUtil.SqlHelpers
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{
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public class SqlHelper : IDisposable
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{
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private string _Database;
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private FbConnection _Connection;
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private FbTransaction _Transaction;
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public SqlHelper(string database)
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{
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#if DEBUG
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if (string.IsNullOrEmpty(database))
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throw new ArgumentException("构造函数参数不允许为空");
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#endif
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_Database = database;
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CreateConnection();
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}
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~SqlHelper()
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{
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Dispose();
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}
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private FbConnection CreateConnection()
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{
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_Connection = new FbConnection(SQLExecuteUtil.GetConnectionString(_Database));
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_Connection.Open();
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return _Connection;
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}
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public FbTransaction CreateTransaction()
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{
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_Transaction = _Connection.BeginTransaction();
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return _Transaction;
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}
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/// <summary>
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/// 提交事务。注意：提交之后，事务就为空了
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/// </summary>
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public void Commit()
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{
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_Transaction.Commit();
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}
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/// <summary>
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/// Rollback
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/// </summary>
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public void Rollback()
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{
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_Transaction.Rollback();
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}
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public void Insert(string tableName, IDictionary<string, object> fieldsValues)
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{
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new InsertHelper(_Database, _Connection, _Transaction).Insert(tableName, fieldsValues);
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}
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public void Delete(string tableName, string conditions)
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{
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new DeleteHelper(_Database, _Connection, _Transaction).Delete(tableName, conditions);
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}
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public void Update(string tableName, Dictionary<string, object> newValues, string conditions)
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{
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new UpdateHelper(_Database, _Connection, _Transaction).Update(tableName, newValues, conditions);
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}
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public TResult Query<TResult>(string sql, Func<object, TResult> DealResult)
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{
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return SqlExecuteBaseUtil.ExecuteScalar<TResult>(_Connection, _Transaction, sql, DealResult);
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}
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/// <summary>
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/// 查询当前id。主要用于事务中
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/// </summary>
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/// <param name="idVar">要查询的表的表名</param>
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public long GetCurrentID(string tableName)
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{
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return Query<long>("SELECT GEN_ID(" + SqlUtil.GetGeneratorName(tableName) + ", 0) FROM RDB$DATABASE;", idStr => { return (long)idStr; });
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}
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public DataTable Query(string sql)
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{
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return SqlExecuteBaseUtil.ExecuteReader(_Connection, _Transaction, sql);
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}
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public void ExecuteNonQuery(string sql)
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{
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SqlExecuteBaseUtil.ExecuteNonQuery(_Connection, _Transaction, sql);
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}
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public void ExecuteNonQuery(string sql, out bool success)
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{
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string errorMessage;
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ExecuteNonQuery(sql, out success, out errorMessage);
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}
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public void ExecuteNonQuery(string sql, out bool success, out string errorMessage)
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{
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success = false;
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errorMessage = string.Empty;
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try {
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ExecuteNonQuery(sql);
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success = true;
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} catch (Exception ex) {
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success = false;
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errorMessage = ex.ToString();
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}
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}
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public void Dispose()
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{
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if (_Connection != null && _Connection.State == ConnectionState.Open)
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_Connection.Close();
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}
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}
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}
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