Question

How do you call a codebehind/class method from a gridview in an aspx page? Also, I need to pass the value of databound column to that method. Is this possible?

Something like this:

<asp:BoundField DataField="Precision" />
<asp:BoundField DataField="MyNumber" DataFormatString="FormatHelper.Format(MyNumber, Precision)" />

Answer 1

Edit: I tested this to work.

<asp:TemplateField HeaderText="My Number">
  <ItemTemplate>

        <asp:Label runat="server" 
           Text='<%# Eval("MyNumber", FormatHelper.Format((decimal)Eval("MyNumber"), (decimal)Eval("Precision") )) %>' />

  </ItemTemplate>
</asp:TemplateField>

This works because the Eval method takes the DataFormatString as an optional second parameter. note: Make sure you replace the casts with the appropriate types for the method signature.

An easier way might be to bind to a linq-to-objects projection instead.

myGridView.DataBind( from foo in fooList
                     select new {
                       MyNumber = MyNumber,
                       Precision = Precision,
                       MyFormattedNumber = FormatHelper.Format(MyNumber, Precision),
                     } );