How to use Where sentence to find username equal to ID in data base?

Question

How to do this:

var tmpUser = System.Web.HttpContext.Current.User.Identity;

This returns me what user is logged in, e.g. it returns, when I am login, the name of username, so Identity is e.g. daniel (username)

Now in some other form, I want to return the ID of this username, so I have start with this:

var db = new userDbEntities(); // this is my connection to Database

Then:

var connectedUser = from user in db.UserTable 
                    select user  

now here I need WHERE sentence, where I can check if USERNAME is equal to tmpUser, then return the ID of this user in UserTable.

Thanks for any ideas...

Answer 1

Assuming UserName is the column name in UserTable this way will work:

string tmpUser = System.Web.HttpContext.Current.User.Identity.Name;

using(var db = new userDbEntities())
{

    var connectedUser = (from user in db.UserTable
                        where user.UserName == tmpUser
                        select user).FirstOrDefault();
}

or you can simply do using SingleOrDefault:

string tmpUser = System.Web.HttpContext.Current.User.Identity.Name;

using(var db = new userDbEntities())
{
    var connectedUser  = db.UserTable.SingleOrDefault(x=>x.UserName == tmpUser);
}