DataGrid doesn't show my result (Using LINQ to get data)

Question

 My Datagrid does not show any result... I don't know if there's anything wrong with the code... all information is given below :-

 

Thanks in advance :)  

 

 

My Function to get Data from database :-

 

On button AUDS function is called :-

 

Searching Data (Code within the AUDS method)