Hi friends,
          This post is regarding deleting row in datagrid.

code in datagrid1_deletedCommand


1. dataSet11=new DataSet1();
2. DataSet1.T_POTT_PROJECT_MASTERRow dr;
3. long key=Convert.ToInt64(DataGrid1.DataKeys[e.Item.ItemIndex]);
4. dr=this.dataSet11.T_POTT_PROJECT_MASTER.FindByPRJ_ SL_NO(key);
5. dr.Delete();
6. oleDbDataAdapter1.Update(dataSet11);
7. oleDbDataAdapter1.Fill(dataSet11);
8. DataGrid1.DataBind();

when i gone through the Debug mode i observed that dr is undefined value


After Executing it is displaying
System:NullReferenceException
Object Reference not set to an instance of object


Help me fast i just stucked................
Thank in advance