Webconfig代碼
<configuration>
<appSettings>
<add key="myconnect" value="server=.;UID=sa;password='1';database=test" />
</appSettings>
</configuration>
數據庫類代碼
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
/// <summary>
///DB_class 的摘要說明
/// </summary>
public class DB_class
{
SqlConnection myconn;
SqlCommand mycmd;
DataSet ds; //數據集
SqlDataAdapter adapt;
public DB_class()
{
//
//TODO: 在此處添加構造函數邏輯
//
}
public SqlConnection GetConnection()
{
string mystr = ConfigurationManager.AppSettings["myconnect"].ToString();
SqlConnection myconn = new SqlConnection(mystr);
return myconn;
}
public int ExecNonQuery(string strSql)
{
try
{
myconn = GetConnection();//與數據庫連接
mycmd = new SqlCommand();//初始化SqlCommand類對象
mycmd.Connection = myconn;
mycmd.CommandText = strSql;
if (mycmd.Connection.State != ConnectionState.Open)
{
mycmd.Connection.Open();//打開與數據庫的連接
}
int a=mycmd.ExecuteNonQuery();//執行Sql操作，並返回受影響的行數
return a;
}
catch (Exception ex)
{
throw new Exception(ex.Message, ex);
}
finally
{
if (mycmd.Connection.State == ConnectionState.Open)
{//斷開連接，釋放資源
mycmd.Connection.Close();
myconn.Dispose();
mycmd.Dispose();
}
}
}
public string ExecScalar(string strSql)
{
try
{
myconn = GetConnection();//與數據庫連接
mycmd = new SqlCommand();//初始化SqlCommand類對象
mycmd.Connection = myconn;
mycmd.CommandText = strSql;
if (mycmd.Connection.State != ConnectionState.Open)
{
mycmd.Connection.Open();//打開與數據庫的連接
}
//使用SqlCommand對象的ExecuteScalar方法返回第一行第一列的值
//strSql = Convert.ToString(mycmd.ExecuteScalar());
string another = Convert.ToString(mycmd.ExecuteScalar());
return another;
}
catch (Exception ex)
{
throw new Exception(ex.Message, ex);
}
finally
{
if (mycmd.Connection.State == ConnectionState.Open)
{//斷開連接，釋放資源
myconn.Dispose();
mycmd.Connection.Close();
mycmd.Dispose();
}
}
}
public DataTable GetDataSet(string strSql, string TableName)
{
ds = new DataSet();
try
{
myconn = GetConnection();//與數據庫連接
adapt = new SqlDataAdapter(strSql, myconn); //實例化SqlDataAdapter類對象
adapt.Fill(ds, TableName);//填充數據集
return ds.Tables[TableName];//返回數據集DataSet的表的集合
}
catch (Exception ex)
{
throw new Exception(ex.Message, ex);
}
finally
{//斷開連接，釋放資源
myconn.Close();
adapt.Dispose();
ds.Dispose();
myconn.Dispose();
}
}
}