Question

i have a select in linq:

in if i must compare username and password for permitted,but a cant access to element of user.

   var user = from u in db.tbl_User select new {u.UserName,u.Password};
 if(txtname == user && txtpass == pass)
            {
            Form2 frm = new Form2();
            Visible = false;
            frm.Show();

            }
            else
            {

               MessageBox.Show("Error","UserName or Password is wrong",MessageBoxButtons.OK);

            }

how can i give element of user?

Answer 1

Your user variable is a query which returns a sequence of matching users – not a single user.

It sounds like you might want:

var user = db.tbl_User
             .FirstOrDefault(u => u.UserName == txtname.Text
                                  && u.Password == txtPass.Text);
if (user != null)
{
    ...
}

(I hope you don’t really have plain-text passwords, by the way…)