Question

I just using a simple LINQ query having group by clause and trying to bind its result set to GridView.
My LINQ query looks like

var expData = from c in WebDB.TransTable
              group c by c.enterdate into g
              select g;

Grid view on ASP.NET page

<asp:GridView ID="GridView1" AutoGenerateColumns="true" runat="server" DataKeyField="Key" />

But getting the error:

A field or property with the name ‘Key’ was not found on the selected data source.

Anyone can help me please?

None of the answers were helpful

Answer 1

EDIT This ignores the “” in your linq statement

Look at the attribute on your asp.net GridView(aspx code): DataKeyField=”” is pointing to a column name that does not exist in your linq query

<asp:GridView AutoGenerateColumns="true" DataKeyField="Key"/>