Question

i have a checkbox in gridview.

 <asp:CheckBox  ID='chkStatus' runat='server'  Checked='<%#GetStatus(Eval('VaccinationCompletedStatus'))  %>'/> 

The function GetStatus is as follows

  Public Function GetStatus(ByVal objStatus As Object) As Boolean         If objStatus = True Then             Return True         ElseIf objStatus = False Then             Return False         Else             Return False         End If      End Function 

But if Status is coming as null from database then one error is coming as System.DBNull cannot be cast to object.If null is coming from database i want to get checkbox checked false.

Answer 1

You could check for DBNull first:

If DBNull.Value.Equals(objStatus) Then   Return False Else   Return objStatus End If