CODEWITHSUNDEEP
c#asp.net-mvclinq
hamza rafiq
hamza rafiq

Reputation: 135

mvc 5 asp.net selectlist with where condition

this is the select list in the action controller, 

ViewBag.UserName = new SelectList(db.Users.Where(g => g.UserName == User.Identity.GetUserName()), "UserName", "UserName");

which I am passing to the view :

 <div class="form-group">
            @Html.LabelFor(model => model.UserName, "UserName", htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.DropDownList("UserName", null, htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.UserName, "", new { @class = "text-danger" })
            </div>
        </div>

and it's not working erro:

LINQ to Entities does not recognize the method 'System.String GetUserName(System.Security.Principal.IIdentity)' method, and this method cannot be translated into a store expression.

Upvotes: 1

Views: 5151

Answers (3)

Haitham Shaddad
Haitham Shaddad

Reputation: 4456

Change the first line to:

string userName = User.Identity.GetUserName();
ViewBag.UserName = new SelectList(db.Users.Where(g => g.UserName == userName).ToList(), "UserName", "UserName");

You have to add the ToList() after the Where in order to execute the query and return the results.

Upvotes: 1

Nitin S
Nitin S

Reputation: 7598

linq/lambda expressions do not recognize the GetUserName function, you have to read it in separate variable and use that variable in linq query/lambda expression.

 var username = User.Identity.GetUserName();
 ViewBag.UserName = new SelectList(db.Users.Where(g => g.UserName == username), "UserName", "UserName");

Upvotes: 2

Aleksandar Matic
Aleksandar Matic

Reputation: 799

GetUserName can't be translated into a expression. Try it like this

var username = User.Identity.GetUserName();
ViewBag.UserName = new SelectList(db.Users.Where(g => g.UserName == username), "UserName", "UserName");

And maybe adding .ToList() like Haitham suggested.

Upvotes: 3

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