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Problem with self sorting gridview

Hi

Thanks for this great class. I was searching for this for a long time and I couldn't get it to work in my program. Now it works but it has one problem in my program.

The code below works just fine:

List <vIntStudent> student = BLStudent.GetAllStudents();

Gridview.datasource = student;

Gridview.databind();

This shows me all the information in my students table.

But I want to not have all the information in my table. So I do in the gridview on the aspx page:

<singleEels:selfsortinggridview id="GridView1" runat="server" allowsorting="true">

<columns>

<asp:boundfield headertext="test" datafield="fieldInTable" sortexpressioin="fieldInTable" />

</columns>

</singleEels:selfsortinggridview>

This gives me an 'object reference not set to an instance of an object' error. I've debugged the selfsortinggridview class and everything is filled in correctly but when I come in the LateBoundSorter class it gives the above error. There is going something wrong in the GetPropertyValue.

Can somebody help me with this?