Find the value of control inside the datatemplate of datagrid in silverlight

Hi,

i am having one datagrid . i am binding data to that grid. in that grid i am having one column in that column i took one hyperlinkbutton called TakeExam in datatemplate. i am having employeeid column in that datagrid. now when i click on hyperlink i have to get the employee id of perticular row . i am sending my source code and xaml.cs file too.can anybody help me




 
 
 
 
 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 




 private void Hpl_TakeExam_Click(object sender, RoutedEventArgs e)
  {
 
  foreach (Assessment assesment in Grd_AssessmentDetails.ItemsSource)
  {
 
  FrameworkElement ele = Grd_AssessmentDetails.Columns[columnindex].GetCellContent(assesment);
  Label allotedexamid = ele.FindName("lbl_AllotedExamid") as Label;
  allotedexamid.Content = assesment.AllotedExamID;
}



Thanks
P.Nagaraju.