添加项目文件。
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629
Epost.DAL/DB.cs
Normal file
629
Epost.DAL/DB.cs
Normal file
@ -0,0 +1,629 @@
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using System;
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using System.Collections;
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using System.Collections.Specialized;
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using System.Data;
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using System.Configuration;
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using System.Data.Common;
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using Epost.Common;
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namespace Epost.DAL
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{
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/// <summary>
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/// 数据访问基础类
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/// </summary>
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public class DB
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{
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protected static string connectionString = ConfigurationManager.ConnectionStrings["SqlLocDPSConnection"].ConnectionString;
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DbProviderFactory provider;
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public DB()
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{
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provider = DbProviderFactories.GetFactory(ConfigurationManager.ConnectionStrings["SqlLocDPSConnection"].ProviderName);
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}
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#region 执行简单SQL语句
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/// <summary>
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/// 执行SQL语句，返回影响的记录数
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/// </summary>
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/// <param name="SQLString">SQL语句</param>
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/// <returns>影响的记录数</returns>
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public int ExecuteSql(string SQLString)
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{
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using (DbConnection connection = provider.CreateConnection())
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{
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connection.ConnectionString = connectionString;
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using (DbCommand cmd = provider.CreateCommand())
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{
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cmd.Connection = connection;
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cmd.CommandText = SQLString;
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try
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{
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connection.Open();
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (DbException ex)
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{
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connection.Close();
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connection.Dispose();
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LogHelper.WriteLogInfo("数据库连接异常！" + ex.Message);
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return 0;
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//throw new Exception(ex.Message);
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}
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}
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}
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}
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/// <summary>
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/// 执行多条SQL语句，实现数据库事务。
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/// </summary>
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/// <param name="SQLStringList">多条SQL语句</param>
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public void ExecuteSqlTran(ArrayList SQLStringList)
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{
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using (DbConnection conn = provider.CreateConnection())
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{
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conn.ConnectionString = connectionString;
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conn.Open();
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using (DbCommand cmd = provider.CreateCommand())
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{
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cmd.Connection = conn;
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using (DbTransaction tx = conn.BeginTransaction())
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{
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cmd.Transaction = tx;
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try
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{
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for (int n = 0; n < SQLStringList.Count; n++)
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{
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string strsql = SQLStringList[n].ToString();
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if (strsql.Trim().Length > 1)
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{
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cmd.CommandText = strsql;
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cmd.ExecuteNonQuery();
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}
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}
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tx.Commit();
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}
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catch (DbException ex)
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{
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tx.Rollback();
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conn.Close();
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conn.Dispose();
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LogHelper.WriteLogInfo("数据库连接异常！" + ex.Message);
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//throw ex;
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}
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}
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}
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}
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}
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/// <summary>
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/// 执行一条计算查询结果语句，返回查询结果（object）。
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/// </summary>
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/// <param name="SQLString">计算查询结果语句</param>
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/// <returns>查询结果（object）</returns>
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public object GetSingle(string SQLString)
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{
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using (DbConnection connection = provider.CreateConnection())
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{
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connection.ConnectionString = connectionString;
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using (DbCommand cmd = provider.CreateCommand())
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{
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cmd.Connection = connection;
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cmd.CommandText = SQLString;
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try
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{
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connection.Open();
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object obj = cmd.ExecuteScalar();
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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return null;
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}
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else
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{
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return obj;
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}
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}
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catch (DbException ex)
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{
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connection.Close();
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connection.Dispose();
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LogHelper.WriteLogInfo("数据库连接异常！" + ex.Message);
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// throw new Exception(ex.Message);
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return null;
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}
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}
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}
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}
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/// <summary>
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/// 执行查询语句，返回SqlDataReader
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/// </summary>
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/// <param name="strSQL">查询语句</param>
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/// <returns>SqlDataReader</returns>
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public DbDataReader ExecuteReader(string strSQL)
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{
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DbConnection connection = provider.CreateConnection();
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connection.ConnectionString = connectionString;
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DbCommand cmd = provider.CreateCommand();
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cmd.Connection = connection;
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cmd.CommandText = strSQL;
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try
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{
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connection.Open();
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DbDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
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return myReader;
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}
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catch (System.Data.Common.DbException ex)
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{
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connection.Close();
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connection.Dispose();
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LogHelper.WriteLogInfo("数据库连接异常！" + ex.Message);
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//throw new Exception(ex.Message);
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return null;
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}
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}
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/// <summary>
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/// 执行查询语句，返回DataSet
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/// </summary>
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/// <param name="SQLString">查询语句</param>
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/// <returns>DataSet</returns>
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public DataSet GetDataSet(string SQLString)
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{
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using (DbConnection connection = provider.CreateConnection())
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{
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connection.ConnectionString = connectionString;
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using (DbCommand cmd = provider.CreateCommand())
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{
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cmd.Connection = connection;
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cmd.CommandText = SQLString;
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try
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{
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DataSet ds = new DataSet();
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DbDataAdapter adapter = provider.CreateDataAdapter();
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adapter.SelectCommand = cmd;
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adapter.Fill(ds, "ds");
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return ds;
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}
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catch (DbException ex)
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{
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connection.Close();
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connection.Dispose();
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LogHelper.WriteLogInfo("数据库连接异常！"+ ex.Message);
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//throw new Exception(ex.Message);
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return null;
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}
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}
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}
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}
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#endregion
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#region 执行带参数的SQL语句
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/// <summary>
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/// 执行SQL语句，返回影响的记录数
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/// </summary>
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/// <param name="SQLString">SQL语句</param>
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/// <returns>影响的记录数</returns>
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public int ExecuteSql(string SQLString, DbParameter[] cmdParms)
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{
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using (DbConnection connection = provider.CreateConnection())
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{
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connection.ConnectionString = connectionString;
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using (DbCommand cmd = provider.CreateCommand())
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{
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cmd.Connection = connection;
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cmd.CommandText = SQLString;
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try
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{
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PrepareCommand(cmd, connection, null, SQLString, cmdParms);
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int rows = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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return rows;
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}
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catch (DbException ex)
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{
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connection.Close();
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connection.Dispose();
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LogHelper.WriteLogInfo("数据库连接异常！" + ex.Message);
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//throw new Exception(ex.Message);
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return 0;
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}
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}
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}
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}
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/// <summary>
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/// 执行多条SQL语句，实现数据库事务。
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/// </summary>
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/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
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public void ExecuteSqlTran(Hashtable SQLStringList)
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{
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using (DbConnection conn = provider.CreateConnection())
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{
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conn.ConnectionString = connectionString;
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conn.Open();
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using (DbTransaction trans = conn.BeginTransaction())
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{
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using (DbCommand cmd = provider.CreateCommand())
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{
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try
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{
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//循环
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foreach (DictionaryEntry myDE in SQLStringList)
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{
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string cmdText = myDE.Key.ToString();
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DbParameter[] cmdParms = (DbParameter[])myDE.Value;
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PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
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int val = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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}
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trans.Commit();
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}
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catch (DbException ex)
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{
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trans.Rollback();
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conn.Close();
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conn.Dispose();
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LogHelper.WriteLogInfo("数据库连接异常！" + ex.Message);
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//throw ex;
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}
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}
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}
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}
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}
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/// <summary>
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/// 执行一条计算查询结果语句，返回查询结果（object）,返回首行首列的值;
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/// </summary>
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/// <param name="SQLString">计算查询结果语句</param>
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/// <returns>查询结果（object）</returns>
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public object GetSingle(string SQLString, DbParameter[] cmdParms)
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{
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using (DbConnection connection = provider.CreateConnection())
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{
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connection.ConnectionString = connectionString;
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using (DbCommand cmd = provider.CreateCommand())
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{
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try
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{
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PrepareCommand(cmd, connection, null, SQLString, cmdParms);
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object obj = cmd.ExecuteScalar();
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cmd.Parameters.Clear();
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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return null;
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}
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else
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{
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return obj;
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}
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}
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catch (DbException ex)
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{
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connection.Close();
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connection.Dispose();
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LogHelper.WriteLogInfo("数据库连接异常！" + ex.Message);
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//throw new Exception(ex.Message);
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return null;
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}
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}
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}
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}
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/// <summary>
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/// 执行查询语句，返回SqlDataReader
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/// </summary>
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/// <param name="strSQL">查询语句</param>
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/// <returns>SqlDataReader</returns>
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public DbDataReader ExecuteReader(string SQLString, DbParameter[] cmdParms)
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{
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DbConnection connection = provider.CreateConnection();
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connection.ConnectionString = connectionString;
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DbCommand cmd = provider.CreateCommand();
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try
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{
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PrepareCommand(cmd, connection, null, SQLString, cmdParms);
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DbDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
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cmd.Parameters.Clear();
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return myReader;
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}
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catch (DbException e)
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{
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connection.Close();
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connection.Dispose();
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LogHelper.WriteLogInfo("数据库连接异常！" + e.Message);
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//throw new Exception(e.Message);
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return null;
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}
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}
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/// <summary>
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/// 执行查询语句，返回DataSet
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/// </summary>
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/// <param name="SQLString">查询语句</param>
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/// <returns>DataSet</returns>
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public DataSet GetDataSet(string SQLString, DbParameter[] cmdParms)
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{
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using (DbConnection connection = provider.CreateConnection())
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{
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connection.ConnectionString = connectionString;
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using (DbCommand cmd = provider.CreateCommand())
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{
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using (DbDataAdapter da = provider.CreateDataAdapter())
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{
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PrepareCommand(cmd, connection, null, SQLString, cmdParms);
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da.SelectCommand = cmd;
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DataSet ds = new DataSet();
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try
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{
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da.Fill(ds, "ds");
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cmd.Parameters.Clear();
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return ds;
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}
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catch (DbException ex)
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{
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connection.Close();
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connection.Dispose();
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LogHelper.WriteLogInfo("数据库连接异常！" + ex.Message);
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// throw new Exception(ex.Message);
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return null;
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}
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}
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}
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}
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}
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private void PrepareCommand(DbCommand cmd, DbConnection conn, DbTransaction trans, string cmdText, DbParameter[] cmdParms)
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{
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if (conn.State != ConnectionState.Open)
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{
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conn.Open();
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}
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cmd.Connection = conn;
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cmd.CommandText = cmdText;
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if (trans != null)
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{
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cmd.Transaction = trans;
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}
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cmd.CommandType = CommandType.Text;//cmdType;
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if (cmdParms != null)
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{
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foreach (DbParameter parm in cmdParms)
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{
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cmd.Parameters.Add(parm);
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}
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}
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}
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#endregion
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#region 存储过程操作
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/// <summary>
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/// 执行存储过程;
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/// </summary>
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/// <param name="storeProcName">存储过程名</param>
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/// <param name="parameters">所需要的参数</param>
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/// <returns>返回受影响的行数</returns>
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public int RunProcedureExecuteSql(string storeProcName, DbParameter[] parameters)
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{
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using (DbConnection connection = provider.CreateConnection())
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{
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connection.ConnectionString = connectionString;
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DbCommand cmd = BuildQueryCommand(connection, storeProcName, parameters);
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int rows = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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connection.Close();
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return rows;
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}
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}
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/// <summary>
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/// 执行存储过程,返回首行首列的值
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/// </summary>
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/// <param name="storeProcName">存储过程名</param>
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/// <param name="parameters">存储过程参数</param>
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/// <returns>返回首行首列的值</returns>
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public Object RunProcedureGetSingle(string storeProcName, DbParameter[] parameters)
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{
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using (DbConnection connection = provider.CreateConnection())
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{
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connection.ConnectionString = connectionString;
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try
|
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{
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DbCommand cmd = BuildQueryCommand(connection, storeProcName, parameters);
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object obj = cmd.ExecuteScalar();
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cmd.Parameters.Clear();
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
|
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{
|
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return null;
|
||||
}
|
||||
else
|
||||
{
|
||||
return obj;
|
||||
}
|
||||
}
|
||||
catch (DbException e)
|
||||
{
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connection.Close();
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||||
connection.Dispose();
|
||||
//throw new Exception(e.Message);
|
||||
return null;
|
||||
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 执行存储过程
|
||||
/// </summary>
|
||||
/// <param name="storedProcName">存储过程名</param>
|
||||
/// <param name="parameters">存储过程参数</param>
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||||
/// <returns>SqlDataReader</returns>
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||||
public DbDataReader RunProcedureGetDataReader(string storedProcName, DbParameter[] parameters)
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||||
{
|
||||
DbConnection connection = provider.CreateConnection();
|
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connection.ConnectionString = connectionString;
|
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DbDataReader returnReader;
|
||||
DbCommand cmd = BuildQueryCommand(connection, storedProcName, parameters);
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cmd.CommandType = CommandType.StoredProcedure;
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returnReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
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cmd.Parameters.Clear();
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return returnReader;
|
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}
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||||
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/// <summary>
|
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/// 执行存储过程
|
||||
/// </summary>
|
||||
/// <param name="storedProcName">存储过程名</param>
|
||||
/// <param name="parameters">存储过程参数</param>
|
||||
/// <returns>DataSet</returns>
|
||||
public DataSet RunProcedureGetDataSet(string storedProcName, DbParameter[] parameters)
|
||||
{
|
||||
using (DbConnection connection = provider.CreateConnection())
|
||||
{
|
||||
connection.ConnectionString = connectionString;
|
||||
DataSet dataSet = new DataSet();
|
||||
DbDataAdapter sqlDA = provider.CreateDataAdapter();
|
||||
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
|
||||
sqlDA.Fill(dataSet);
|
||||
sqlDA.SelectCommand.Parameters.Clear();
|
||||
sqlDA.Dispose();
|
||||
return dataSet;
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 执行多个存储过程，实现数据库事务。
|
||||
/// </summary>
|
||||
/// <param name="SQLStringList">存储过程的哈希表（value为存储过程语句，key是该语句的DbParameter[]）</param>
|
||||
public bool RunProcedureTran(Hashtable SQLStringList)
|
||||
{
|
||||
using (DbConnection connection = provider.CreateConnection())
|
||||
{
|
||||
connection.ConnectionString = connectionString;
|
||||
connection.Open();
|
||||
using (DbTransaction trans = connection.BeginTransaction())
|
||||
{
|
||||
using (DbCommand cmd = provider.CreateCommand())
|
||||
{
|
||||
try
|
||||
{
|
||||
//循环
|
||||
foreach (DictionaryEntry myDE in SQLStringList)
|
||||
{
|
||||
cmd.Connection = connection;
|
||||
string storeName = myDE.Value.ToString();
|
||||
DbParameter[] cmdParms = (DbParameter[])myDE.Key;
|
||||
|
||||
cmd.Transaction = trans;
|
||||
cmd.CommandText = storeName;
|
||||
cmd.CommandType = CommandType.StoredProcedure;
|
||||
if (cmdParms != null)
|
||||
{
|
||||
foreach (DbParameter parameter in cmdParms)
|
||||
{
|
||||
cmd.Parameters.Add(parameter);
|
||||
}
|
||||
}
|
||||
int val = cmd.ExecuteNonQuery();
|
||||
cmd.Parameters.Clear();
|
||||
}
|
||||
trans.Commit();
|
||||
return true;
|
||||
}
|
||||
catch
|
||||
{
|
||||
trans.Rollback();
|
||||
connection.Close();
|
||||
connection.Dispose();
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 执行多个存储过程，实现数据库事务。
|
||||
/// </summary>
|
||||
/// <param name="SQLStringList">存储过程的哈希表（value为存储过程语句，key是该语句的DbParameter[]）</param>
|
||||
//public bool RunProcedureTran(C_HashTable SQLStringList)
|
||||
//{
|
||||
// using (DbConnection connection = provider.CreateConnection())
|
||||
// {
|
||||
// connection.ConnectionString = connectionString;
|
||||
// connection.Open();
|
||||
// using (DbTransaction trans = connection.BeginTransaction())
|
||||
// {
|
||||
// using (DbCommand cmd = provider.CreateCommand())
|
||||
// {
|
||||
// try
|
||||
// {
|
||||
// //循环
|
||||
// foreach (DbParameter[] cmdParms in SQLStringList.Keys)
|
||||
// {
|
||||
// cmd.Connection = connection;
|
||||
// string storeName = SQLStringList[cmdParms].ToString();
|
||||
|
||||
// cmd.Transaction = trans;
|
||||
// cmd.CommandText = storeName;
|
||||
// cmd.CommandType = CommandType.StoredProcedure;
|
||||
// if (cmdParms != null)
|
||||
// {
|
||||
// foreach (DbParameter parameter in cmdParms)
|
||||
// {
|
||||
// cmd.Parameters.Add(parameter);
|
||||
// }
|
||||
// }
|
||||
// int val = cmd.ExecuteNonQuery();
|
||||
// cmd.Parameters.Clear();
|
||||
// }
|
||||
// trans.Commit();
|
||||
// return true;
|
||||
// }
|
||||
// catch
|
||||
// {
|
||||
// trans.Rollback();
|
||||
// connection.Close();
|
||||
// connection.Dispose();
|
||||
// return false;
|
||||
// }
|
||||
// }
|
||||
// }
|
||||
// }
|
||||
//}
|
||||
|
||||
/// <summary>
|
||||
/// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
|
||||
/// </summary>
|
||||
/// <param name="connection">数据库连接</param>
|
||||
/// <param name="storedProcName">存储过程名</param>
|
||||
/// <param name="parameters">存储过程参数</param>
|
||||
/// <returns>SqlCommand</returns>
|
||||
private DbCommand BuildQueryCommand(DbConnection connection, string storedProcName, DbParameter[] parameters)
|
||||
{
|
||||
if (connection.State != ConnectionState.Open)
|
||||
{
|
||||
connection.Open();
|
||||
}
|
||||
DbCommand command = provider.CreateCommand();
|
||||
command.CommandText = storedProcName;
|
||||
command.Connection = connection;
|
||||
command.CommandType = CommandType.StoredProcedure;
|
||||
if (parameters != null)
|
||||
{
|
||||
foreach (DbParameter parameter in parameters)
|
||||
{
|
||||
command.Parameters.Add(parameter);
|
||||
}
|
||||
}
|
||||
return command;
|
||||
}
|
||||
#endregion
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user