How Will I Call Data To Texboxes From Database Using Linq To Sql

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i have this, no error but it doesn't work

C#

POSDataContext pos = new POSDataContext();
Credential c = new Credential();

var q = from m in pos.Credentials where c.UserName == usernamelabel.Text select m;

fnamelabel.Text = c.FirstName;
lnamelabel.Text = c.LastName;
pnumberlabel.Text = c.PhoneNumber;
dateofcreationlabel.Text = c.DateCreated.ToString();
privilegelabel.Text = c.Privilege;

Posted 20-Nov-15 8:56am

Member 11673987

Updated 20-Nov-15 10:00am

Maciej Los

v3

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Afzaal Ahmad Zeeshan 20-Nov-15 15:25pm

"doesn't work" — why?

There are many possible reasons for this claim of yours. How do you want it to work and how does it not work?

Member 11673987 20-Nov-15 15:44pm

i want the values coming from the database to enter the listed controls. though no error but it doesn't work... help me please

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Maciej Los · Answer 1 · 2015-11-20T10:13:00

Take a look at your Linq query:

C#

var q = from m in pos.Credentials where c.UserName == usernamelabel.Text select m;

What c is doing there?

I guess that q returns a IEnumerable<Credential>. So, you have to loop through the collection of Credential to be able to use its properties:

C#

foreach(Credential c in q)
{
   Console.WriteLine("{0}", c.FirstName);
}

But... if you would like to return single object, try this:

C#

var q = pos.Credentials.Where(c=>c.UserName == "User1").SingleOrDefault();

then:

C#

fnamelabel.Text = q.FirstName