请问下 这段代码哪出错了啊? 报错是 用户未处理 错误代码是
SqlConnection Con = new SqlConnection(SqlDataSource1.ConnectionString);
string sel="select * from bbb where user=" + TextBox1.Text;
SqlCommand addCommand =new SqlCommand(sel,Con);
addCommand.Connection.Open();
SqlDataReader selreader ;
selreader=addCommand.ExecuteReader();//报错
if (selreader.Read())
{
Label3.Text = "登陆成功!";
return;
} else
{
Label3.Text = "用户名或密码错误~!";
}
SqlConnection Con = new SqlConnection(SqlDataSource1.ConnectionString);
string sel="select * from bbb where user=" + TextBox1.Text;
SqlCommand addCommand =new SqlCommand(sel,Con);
addCommand.Connection.Open();
SqlDataReader selreader ;
selreader=addCommand.ExecuteReader();//报错
if (selreader.Read())
{
Label3.Text = "登陆成功!";
return;
} else
{
Label3.Text = "用户名或密码错误~!";
}
string sel="select * from bbb where user='" + TextBox1.Text;
sel+="'";
这个语句要有问题,user是关键字,应该加上[],textbox1.text应该用引号引起来、