.net中webform和winform连接sql server 2000数据库的c#操作类

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一.这个为c#连接winform
注意点:(1)调用时必须引用此类的命名空间
(2)类中引用的命名空间
using System;
using System.Data;
using System.Data.SqlClient;
(3)调用示例:
   DataSet ds =new DataSet();
   string sql="select * from [user]";
   ds=DoDataBase.GetDataSet(sql);
   dataGrid1.DataSource=ds.Tables[0].DefaultView;
//以上四行为用02wangluo数据库中user表来填充DataSet后绑定到dataGrid1
//这是调用的GetDataSet方法-->此方法主要面对的是查(select)


string sql="insert into test(test_xingming) values ("+txtUserID.Text+")";
             DoDataBase.ExecuteSQL(sql);
//以上两行是调用DoDataBase数据库操作类中的ExecuteSQL方法来执行对数据库的增,删,改等操作,一般写到button_click中
(3)具体操作类代码:
public class DoDataBase
 {
  public DoDataBase()
  {
   //
   // TODO: 在此处添加构造函数逻辑
   //
  }
  public static DataSet GetDataSet(string sql)
  {
            SqlConnection conn=new SqlConnection();
   DataSet ds=new DataSet();
   try
   {

    conn=new SqlConnection("server=localhost;uid=sa;pwd=;database=02wangluo");
    SqlDataAdapter sda=new SqlDataAdapter(sql,conn);
    sda.Fill(ds);
    return ds;
               
   }
   catch(Exception ex)
   {
    throw(ex);
   }
   finally
   {
    conn.Close();
   }
  }
  public static int ExecuteSQL(string sql)
  {
    SqlConnection conn=new SqlConnection();
   try
   {
    conn=new SqlConnection("server=localhost;uid=sa;pwd=;database=02wangluo");
    SqlCommand sqlCmd =new SqlCommand(sql,conn);
    conn.Open();
    return sqlCmd.ExecuteNonQuery();
   }
   catch(Exception ex)
   {
    throw ex;
   }
   finally
   {
    conn.Close();
   }
  }
 }

二asp.net中c#操作SQL SERVER 2000数据库的操作类
(1)类中命名空间:
using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
using System.Configuration;
(2)在web.config中的<configuration>下面一行加入数据库连接字符串
<appSettings>
<add key="sqlConn" value="data source=(local); initial catalog=02wangluo;user id=sa; password="/>
</appSettings>
(2)操作类代码:
public class DoDataBase
 {
   public static SqlConnection sqlConn = new SqlConnection();
  public DoDataBase()
  {
   
  }
  public static DataSet GetDataSet(string sql)
  {
   DataSet ds = new DataSet();
   
   try
   {
    sqlConn = new SqlConnection(ConfigurationSettings.AppSettings["sqlConn"]);
    SqlDataAdapter sqlApt = new SqlDataAdapter(sql, sqlConn);    
    sqlApt.Fill(ds);
    return ds;
   }
   catch (Exception ex)
   {
    throw (ex);   
   }
     }

  public static int ExecuteSQL(string sql)
  {
   try
   {
    sqlConn = new SqlConnection(ConfigurationSettings.AppSettings["sqlConn"]);
    SqlCommand sqlCmd =new SqlCommand(sql,sqlConn);
    sqlConn.Open();
    return sqlCmd.ExecuteNonQuery();
   }
   catch (Exception ex)
   {
    throw (ex);
   }
   finally
   {
    sqlConn.Close();
   }
   }
 }
(4)调用示例:略

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