C#中数据库操作
类别: ASP.NET教程 
* 功能：数据库操作相关
* 作者：FlashICP
* 时间：2005-7-22
* ******************************/
using System;
using System.Data;
using System.Data.SqlClient;
using System.Web;
namespace moban
{
public class data
{
protected static string con=\"server=[yourserver];database=[yourdata];user id=[your id];password=[youpassword]\";
//数据库字符串
protected System.Data.SqlClient.SqlConnection DataConnection;
//数据库连接对象
protected System.Data.SqlClient.SqlDataAdapter DataAdapter;
//SqlDataAdapter对象
protected System.Data.SqlClient.SqlCommand DataCommand;
//SqlCommand对象
protected System.Data.SqlClient.SqlCommandBuilder DataComBuilder;
//SqlCommandBuilder对象
protected System.Data.DataSet DataSet;
//DataSet对象
protected System.Data.DataRow DataRow;
//DataRow对象
protected System.Data.SqlClient.SqlDataReader DataReader=null;
//构造函数
public data()
{
DataConnection=DataConn();
}
//连接数据库参数
public string Con
{
get{return con;}
set{con= value;}
}
//数据库连接参数
public SqlConnection DataConn()
{
DataConnection=new SqlConnection(Con);
return DataConnection;
}
//返回数据库连接对象
public SqlDataReader DataQuery(string Sql)
{
Sql=Sql.Replace(\"--\",\"\");
Sql=Sql.Replace(\";\",\"\");
DataConnection=DataConn();
DataConnection.Open();
DataReader=null;
DataCommand=new SqlCommand(Sql,DataConnection);
DataReader=DataCommand.ExecuteReader();
DataCommand.Dispose();
return DataReader;
}
//返回DataSet
public virtual DataSet DataSetQuery(string Sql,string TableName)
{
DataConnection=DataConn();
DataAdapter=new SqlDataAdapter(Sql,DataConnection);
DataSet=new DataSet();
DataAdapter.Fill(DataSet,TableName);
DataAdapter.Dispose();
DataConnection.Close();
DataConnection.Dispose();
return DataSet;
}
//返回DataSet
public DataSet DataSetQuery(DataSet myds,string TableName,string Sql)
{
DataConnection=DataConn();
DataAdapter=new SqlDataAdapter(Sql,DataConnection);
DataAdapter.Fill(myds,TableName);
DataConnection.Close();
DataConnection.Dispose();
return DataSet;
}
//返回DataSet
public DataSet DataSetQuery(string Sql,string TableName,int StarIndex,int Count)
{
DataConnection=DataConn();
DataConnection.Open();
DataAdapter=new SqlDataAdapter(Sql,DataConnection);
DataSet=new DataSet();
DataAdapter.Fill(DataSet,StarIndex,Count,TableName);
DataConnection.Close();
DataConnection.Dispose();
return DataSet;
}
public void DataDo(string sqlstr)
{
DataConnection=DataConn();
SqlCommand mycom=DataConnection.CreateCommand();
mycom.CommandText=sqlstr;
DataConnection.Open();
mycom.ExecuteNonQuery();
DataConnection.Close();
}
//返回DataSet 开始行到结束行
public bool EditData(string Sql)
{
DataConnection=DataConn();
DataConnection.Open();
DataCommand=new SqlCommand(Sql,DataConnection);
try
{
DataCommand.ExecuteNonQuery();
DataConnection.Close();
return true;
}
catch(Exception ex)
{
System.Console.Write(ex.Message.ToString());
DataConnection.Close();
return false;
}
}
//执行成功返回真,否则返回假．
public object ExecuteScalar(string Sql)
{
DataConnection=DataConn();
DataConnection.Open();
DataCommand=new SqlCommand(Sql,DataConnection);
try
{
object back = DataCommand.ExecuteScalar();
DataConnection.Close();
return back;
}
catch(Exception ex)
{
System.Console.Write(ex.Message.ToString());
DataConnection.Close();
return null;
}
}
//返回一个值的查询语句
public DataSet EditData(DataSet DataSet,SqlDataAdapter myda,string TableName)
{
DataComBuilder=new SqlCommandBuilder(myda);
myda.UpdateCommand=DataComBuilder.GetUpdateCommand();
myda.DeleteCommand=DataComBuilder.GetDeleteCommand();
myda.InsertCommand=DataComBuilder.GetInsertCommand();
myda.Update(DataSet,TableName);
DataSet.AcceptChanges();
this.CloseConnection();
return DataSet;
}
//修改DataSet 并且修改数据库值存储过程
public bool DataProcedure(string ProcedureName)
{
DataConnection=DataConn();
DataConnection.Open();
DataCommand=new SqlCommand();
DataCommand.CommandText=ProcedureName;
DataCommand.Connection=DataConnection;
DataCommand.CommandType=System.Data.CommandType.StoredProcedure;
try
{
DataCommand.ExecuteNonQuery();
return true;
}
catch(Exception ex)
{
System.Console.Write(ex.Message.ToString());
return false;
}
}
//无参数存储过程的执行 返回执行真假
public void CloseConnection()
{
if(DataReader!=null)
{
DataReader.Close();
DataReader=null;
}
DataConnection.Close();
DataConnection.Dispose();
}
//关闭连接
}
}
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