Question

I have a VB project I’m working on where I have to break the GridView down to each row and examine a specific cell. How do I go about checking to see if there is a null value or not? The following code results in the error message

“Specified argument was out of the range of valid values.
Parameter name: index”

I’ve checked the cell count for the GridViewRow variable “row” and it comes up at 5, so I’m not sure what I’m doing wrong.

Protected Sub grdProduct_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles grdProduct.RowDataBound

    ' Grey out expired products
    Dim row As GridViewRow
    row = e.Row

    Dim incomingStatus As String
    If row.Cells(5).Text.ToString() <> vbNull Then
        incomingStatus = row.Cells(5).Text.ToString()
    Else
        incomingStatus = ""
    End If

I modified the code to check the cell count first and it is still coming back with the exact same error.

    If row.Cells.Count > 5 And row.Cells(5).Text.ToString() <> vbNull Then
        incomingStatus = row.Cells(5).Text.ToString()
    Else
        incomingStatus = ""
    End If

FINAL EDIT

Modifying the code like so fixed the problem. Thanks guys:

    If row.Cells.Count > 5 Then
        If row.Cells(5).Text.ToString() <> vbNull Then
            incomingStatus = row.Cells(5).Text.ToString()
        Else
            incomingStatus = ""
        End If
    End If

Answer 1

I’ve checked the cell count for the GridViewRow variable “row” and it
comes up at 5, so I’m not sure what I’m doing wrong.

row.Cells(5) returns the 6th Cell, not the 5th since indices are 0 based in .NET. But the Count property returns the actual number of cells.

The same is true for GridView.Rows.

GridView1.Rows(9) 

returns the 10th GridViewRow.