操作数据库的类DbHelper.cs
using System;
using System.Data;
using System.Data.Common;
using System.Configuration;
namespace Utility
{
public class DbHelper
{
private static string dbProviderName = ConfigurationManager.AppSettings["DbHelperProvider"];
private static string dbConnectionString = ConfigurationManager.AppSettings["DbHelperConnectionString"];
private DbConnection connection;
public DbHelper()
{
this.connection = CreateConnection(DbHelper.dbConnectionString);
}
public DbHelper(string connectionString)
{
this.connection = CreateConnection(connectionString);
}
public static DbConnection CreateConnection()
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbConnection dbconn = dbfactory.CreateConnection();
dbconn.ConnectionString = DbHelper.dbConnectionString;
return dbconn;
}
public static DbConnection CreateConnection(string connectionString)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbConnection dbconn = dbfactory.CreateConnection();
dbconn.ConnectionString = connectionString;
return dbconn;
}
/// <summary>
/// 执行的存储过程
/// </summary>
/// <param name="storedProcedure"></param>
/// <returns></returns>
public DbCommand GetStoredProcCommond(string storedProcedure)
{
DbCommand dbCommand = connection.CreateCommand();
dbCommand.CommandText = storedProcedure;
dbCommand.CommandType = CommandType.StoredProcedure;
return dbCommand;
}
/// <summary>
/// 执行的sql语句
/// </summary>
/// <param name="sqlQuery"></param>
/// <returns></returns>
public DbCommand GetSqlStringCommond(string sqlQuery)
{
DbCommand dbCommand = connection.CreateCommand();
dbCommand.CommandText = sqlQuery;
dbCommand.CommandType = CommandType.Text;
return dbCommand;
}
//增加参数#region 增加参数
public void AddParameterCollection(DbCommand cmd, DbParameterCollection dbParameterCollection)
{
foreach (DbParameter dbParameter in dbParameterCollection)
{
cmd.Parameters.Add(dbParameter);
}
}
/// <summary>
/// 增加输出参数 适用于存储过程
/// </summary>
/// <param name="cmd">cmd对象</param>
/// <param name="parameterName">参数名</param>
/// <param name="dbType">参数类型</param>
/// <param name="size">参数大小</param>
public void AddOutParameter(DbCommand cmd, string parameterName, DbType dbType, int size)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Size = size;
dbParameter.Direction = ParameterDirection.Output;
cmd.Parameters.Add(dbParameter);
}
/// <summary>
/// 增加参数列表
/// </summary>
/// <param name="cmd">CMD对象</param>
/// <param name="parameterName">参数名</param>
/// <param name="dbType">参数类型</param>
/// <param name="value">参数值</param>
public void AddInParameter(DbCommand cmd, string parameterName, DbType dbType, object value)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Value = value;
dbParameter.Direction = ParameterDirection.Input;
cmd.Parameters.Add(dbParameter);
}
/// <summary>
/// 增加返回参数 适用于存储过程
/// </summary>
/// <param name="cmd"></param>
/// <param name="parameterName"></param>
/// <param name="dbType"></param>
public void AddReturnParameter(DbCommand cmd, string parameterName, DbType dbType)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Direction = ParameterDirection.ReturnValue;
cmd.Parameters.Add(dbParameter);
}
public DbParameter GetParameter(DbCommand cmd, string parameterName)
{
return cmd.Parameters;
}
/// <summary>
/// 执行SQL或者存储过程返回一个dataSet对象
/// 所需参数cmd对象
/// </summary>
/// <param name="cmd">cmd对象</param>
/// <returns>查询的结果 dataSet对象</returns>
public DataSet ExecuteDataSet(DbCommand cmd)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataSet ds = new DataSet();
dbDataAdapter.Fill(ds);
return ds;
}
/// <summary>
/// 执行SQL或者存储过程返回一个dataTable对象
/// 所需参数cmd对象
/// </summary>
/// <param name="cmd">cmd对象</param>
/// <returns>查询的结果 DataReader对象</returns>
public DataTable ExecuteDataTable(DbCommand cmd)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataTable dataTable = new DataTable();
dbDataAdapter.Fill(dataTable);
return dataTable;
}
/// <summary>
/// 执行sql语句或者存储过程返回一个datareader对象
/// 所需参数CMD对象
/// </summary>
/// <param name="cmd">cmd对象</param>
/// <returns>查询的结果 DataReader对象</returns>
public DbDataReader ExecuteReader(DbCommand cmd)
{
cmd.Connection.Open();
DbDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return reader;
}
/// <summary>
/// 执行一条SQL语句或者存储过程,返回受影响的行数
/// </summary>
/// <param name="cmd">cmd对象</param>
/// <returns></returns>
public int ExecuteNonQuery(DbCommand cmd)
{
cmd.Connection.Open();
int ret = cmd.ExecuteNonQuery();
cmd.Connection.Close();
return ret;
}
/// <summary>
/// 执行一条SQL语句或者存储过程,返回Object对象
/// </summary>
/// <param name="cmd">cmd对象</param>
/// <returns></returns>
public object ExecuteScalar(DbCommand cmd)
{
cmd.Connection.Open();
object ret = cmd.ExecuteScalar();
cmd.Connection.Close();
return ret;
}
//执行事务#region 执行事务
public DataSet ExecuteDataSet(DbCommand cmd, Trans t)
{
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataSet ds = new DataSet();
dbDataAdapter.Fill(ds);
return ds;
}
public DataTable ExecuteDataTable(DbCommand cmd, Trans t)
{
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataTable dataTable = new DataTable();
dbDataAdapter.Fill(dataTable);
return dataTable;
}
public DbDataReader ExecuteReader(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbDataReader reader = cmd.ExecuteReader();
DataTable dt = new DataTable();
return reader;
}
public int ExecuteNonQuery(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
int ret = cmd.ExecuteNonQuery();
return ret;
}
public object ExecuteScalar(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
object ret = cmd.ExecuteScalar();
return ret;
}
}
/// <summary>
/// 事务执行操作
/// </summary>
public class Trans : IDisposable
{
private DbConnection conn;
private DbTransaction dbTrans;
public DbConnection DbConnection
{
get { return this.conn; }
}
public DbTransaction DbTrans
{
get { return this.dbTrans; }
}
public Trans()
{
conn = DbHelper.CreateConnection();
conn.Open();
dbTrans = conn.BeginTransaction();
}
public Trans(string connectionString)
{
conn = DbHelper.CreateConnection(connectionString);
conn.Open();
dbTrans = conn.BeginTransaction();
}
public void Commit()
{
dbTrans.Commit();
this.Colse();
}
public void RollBack()
{
dbTrans.Rollback();
this.Colse();
}
public void Dispose()
{
this.Colse();
}
public void Colse()
{
if (conn.State == System.Data.ConnectionState.Open)
{
conn.Close();
}
}
}
}
本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/yunduan/archive/2009/03/20/4006478.aspx