sqlDataAdapter myDapter=new sqlDataAdapter(connectionString,"select * from T_user where userid=@id and password=@pwd");
dataSet ds=new dataSet();
myDapter.selectCommand.parameters.add("@id",txtUserName.text);
myDapter.se.ectcommand.parameters.add("@pwd",txtPassWord.text);
myDapter.fill(ds)
if(ds.Tables[0].Rows.Count>=0)
//成功登录
else
//登录失败
dataSet ds=new dataSet();
myDapter.selectCommand.parameters.add("@id",txtUserName.text);
myDapter.se.ectcommand.parameters.add("@pwd",txtPassWord.text);
myDapter.fill(ds)
if(ds.Tables[0].Rows.Count>=0)
//成功登录
else
//登录失败
改成
sqlDataAdapter myDapter=new sqlDataAdapter("select * from T_user where userid=@id and password=@pwd",connectionString);