using var type in asp.net mvc list view

Question

The following code does not compile

<ul>
<%
foreach( var row in SomeDataTable.Rows)
{
%>
  <li>
   <%= Html.ActionLink( row["field1"].ToString(), "action", new { } ) %>
  </li>
<%
}v
%>
</ul>

the error is - cannot apply indexing with [] to an expression of type 'object'

var is supposed to be implicit type ?

What gives ?

NOTE - I know it is bad practice to use DataTable/Dataset as is etc etc so hold your horses on that one if you can please :)

Answer 1

Shouldn't it be row["field1"] and not item["field1"]?

Answer 2

You need to use

row["field1"]

instead of

item["field1"]

Answer 3

Does it have something to do w/ you calling item["field1"] but you named the iterator variable "row"?

Answer 4

What happens when you cast it as a DataRow?

(DataRow row in SomeDataTable.Rows)

Answer 5

DataRowCollection does not implement IEnumberable<DataRow> only IEnumerable. You will need to first call SomeDataTable.Rows.Cast<DataRow>() in your foreach or not use var, as mxmissle suggests.

IEnumerable<DataRow> is required for the compiler to know what type is enumerated over, which is required for this use of var.