ASP.net Entity Framework Check if exists in database - sql

Question

I have VS2015, entity framework 6. I have a database with one table (Logins)
FirstName, lastName, Birthdate, email, password
I also have a textbox(s), button
tbEmail tbpass and btnLogin
How do I check if the users email in the textbox matches one in the database?
So far I have:
protected void btnLogin_Click(object sender, EventArgs e)
{
Logins Log = new Logins();
using (LoginDataEntities lg = new LoginDataEntities())
{
string #email = tbUsernameL.Text;
string #password = tbPassL.Text;
var logged = from L in lg.Logins
where L.Username == #email
&& L.Pass == #password
select L.Username;
if (logged != null)
{
lblSuccess.Visible = true;
}
else
{
lblFail.Visible = true;
}
}
}
However, its not working and always enables the success label. How do I fix this?

Answer 1

Try it once with the following snippet:
using (LoginDataEntities lg = new LoginDataEntities())
{
string #email = tbUsernameL.Text;
string #password = tbPassL.Text;
var logged = lg.Logins
.SingleOrDefault(l=> l.Username == #email && l.Pass == #password);
if (logged != null) // update
{
lblSuccess.Visible = true;
}
else
{
lblFail.Visible = true;
}
}
Alternatively, can you also look at the following example again:
http://www.c-sharpcorner.com/uploadfile/b19d5a/custom-user-login-and-registration-page-in-Asp-Net-mvc3-with-razor-and-entity-framework/
Or you refactorisiers the VS template with Individual User Accounts