NullReferenceException

[mohit]

Hi all,
I am creating a web application on web matrix.I have a
datagrid.I have the following code :
DataTable dt=(DataTable)Session["DataGrid"];

DataRow dr = dt.NewRow();

DataView dv;
First it was giving correct result.After that I run the same code then
it is giving the following error message :

Exception Details: System.NullReferenceException: Object reference not
set to an instance of an object.

for the line DataRow dr = dt.NewRow();

what can be the problem??
Any ideas???

 

[Elton Wang]

Error itself shows that there is no data in Session["DataGrid"]. Check if
you save datatable to the Session before you retrieve it.



HTH