关于SqlDataAdapter,SqlConnection,SqlCommand的用法,最好举例说明一个，再线等，急!!!!!!!!!!!!!!!!!

[rain1983]

关于SqlDataAdapter,SqlConnection,SqlCommand的用法,最好举例说明一个，再线等，急!!!!!!!!!!!!!!!!!

[zljblue]

SqlConnection mycon=new SqlConnection("server=服务器名;uid=用户名;pwd=密码;database=数据库名");
mycon.Open();

\\如果SQL语句是Select ...
SqlDataAdapter myda=new SqlDataAdapter(SQL语句,mycon);
myda.Fill(myset);
this.DataGrid1.DataSource=myset.Tables[0].DefaultView;

\\如果SQL语句是Delete、Update、Insert
SqlComman cmd=new SqlCommand();
cmd.CommandText=SQL语句;
cmd.CommandType=System.Data.CommandType.Text;
cmd.Connection=mycon;
cmd.ExcuteNoQuery();

mycon.Close();

[marvelstack]

using System;
using System.Data;
using System.Data.OleDb;

namespace ZZ.DAL
{
/// <summary>
/// AccessDbHelper 的摘要说明。
/// </summary>
public class AccessDbHelper
{
private static string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=GMS.mdb;Persist Security Info=False;";

/// <summary>
/// 获取单个值
/// </summary>
/// <param name="strSql"></param>
/// <returns></returns>
public static object ExecuteScalar(string strSql)
{
object o = null;
OleDbConnection myConn = new OleDbConnection(strConn);
OleDbCommand myComm = new OleDbCommand(strSql,myConn);
try
{
myConn.Open();
o = myComm.ExecuteScalar();
}
catch(Exception e)
{
e.ToString();
}
finally
{
myConn.Close();
}
return o;
}
/// <summary>
/// 更新数据
/// </summary>
/// <param name="strSql"></param>
public static int ExecuteNonQuery(string strSql)
{
int count = -1;
OleDbConnection myConn = new OleDbConnection(strConn);
OleDbCommand myComm = new OleDbCommand(strSql,myConn);
try
{
myConn.Open();
count = myComm.ExecuteNonQuery();
}
catch(Exception e)
{
e.ToString();
}
finally
{
myConn.Close();
}
return count;
}
/// <summary>
/// 获取数据读取器
/// </summary>
/// <param name="strSql"></param>
public static OleDbDataReader ExecuteReader(string strSql)
{
OleDbConnection myConn = new OleDbConnection(strConn);
OleDbCommand myComm = new OleDbCommand(strSql,myConn);
myConn.Open();
return myComm.ExecuteReader(CommandBehavior.CloseConnection);
}
/// <summary>
/// 获取数据集
/// </summary>
/// <param name="strSql"></param>
/// <returns></returns>
public static DataSet ExecuteDataSet(string strSql)
{
DataSet ds = new DataSet();
OleDbConnection myConn = new OleDbConnection(strConn);
try
{
OleDbCommand myComm = new OleDbCommand(strSql,myConn);
OleDbDataAdapter myAda = new OleDbDataAdapter(myComm);
myAda.Fill(ds,"TableName");
}
catch(Exception e)
{
e.ToString();
ds = null;
}
finally
{
myConn.Dispose();
}
return ds;
}
}
}

[huangsuipeng]

UP

[caojingui]

用zhzuo(秋枫)老弟的例子吧

[draclosta]

好好看看Data Access Application Block 概述吧
http://www.microsoft.com/china/msdn/library/dnbda/html/daab-rm.asp

[zhpsam109]

向各位学习！

[hertcloud]

油箱 给你 个列子！

[极限999]

http://www.csdn.net/develop/read_article.asp?id=23258

[Firestone2003]

CSDN上有例子阿！

[CommanSource]

QUICK START!
<script language="C#" runat="server">

void Page_Load(Object Src, EventArgs E ) {

String selectCmd;
String state = Request["state"];

if( state == null || !InputValidator.IsValidAnsiTwoCharacterState(state)) {
selectCmd = "select * from Authors";
}
else {
selectCmd = "select * from Authors where state = '" + state + "'";
}

SqlConnection myConnection = new SqlConnection("server=(local)\\NetSDK;database=pubs;Integrated Security=SSPI");
SqlDataAdapter myCommand = new SqlDataAdapter(selectCmd, myConnection);

DataSet ds = new DataSet();
myCommand.Fill(ds, "Authors");

MyDataGrid.DataSource=new DataView(ds.Tables[0]);
MyDataGrid.DataBind();

// capture the time of the current request
// subsequent requests that are cached will show the
// original time

TimeMsg.Text = DateTime.Now.ToString("G");
}

</script>

[popohei]

可以全部用控件完成
但SqlConnection可能会出错 要自己写Connecttion string

[calmhawkaaa]

可以直接将数据表 “拉”到工程里

系统自动生成 SqlConnnection1 SqlDataAdaper1

然后右键 SqlDataAdapter1 生成 dataSet1

在dataSet1 中配置 SqlCommand (insert delete update)

如果SqlServer 有密码 在“窗体设计器生成的代码”中将this.sqlConnection1.ConnectionString = "workstation id=CALMHAWK;packet size=4096;user id=sa;password=****;data source=ca" +
"lmhawk;persist security info=False;initial catalog=student";


加 password=****