Export Specific DataGridView columns (text and checkboxes) into text file (VB.Net)

Hi there,

I am finishing the commissioning program for an alarm system I am prototyping. I have actually finished the prototype, yet I cannot bring an end to this VB.net program!

I have a datagridview (Sounder_GroupsDataGridView) which is populated by an XML file before the form opens. The DataGridView (Sounder_GroupsDataGridView) has 34 columns and 12 set rows as shown in the photo below HOWEVER there is one column after the "signal" column containing a "location" column which is hidden.

Columns: Signal | Location | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | >all the way to> | 32 |

What I want to do is export:

| Location | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | >all the way to> | 32 |

The file needs to be laid out as follows. So it's location with a comma and then the number values from the 32 checkboxes for that row. But I need to append 32 "F" characters because my system needs 64 characters per line. So, a finished line will look like:

0, 01010101010101000000000101010101FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

64,01010101010101000000000101010101FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

128,00000010101010101001010101010101FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

192,10101010101011111111111111111111FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

256,10101010101011111111111111111111FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

...continued...

I have previously asked how to export two specific columns to a text file, but am unable to modify this to write the additional 31 columns. I have been able to successfully export two columns with that code from the sounder_groupsDataGridView. Here's that code:

The problem with this code is that if I don't manually check the boxes, I will get "true" or "false" as opposed to the numerical value which I need.

Dim sLine AsString=""Dim sLines AsString=""' added

        For iRow As Integer = 0 To Sounder_Groups.Sounder_GroupsDataGridView.RowCount - 1
            sLine = ""
            For iCol As Integer = 0 To Sounder_Groups.Sounder_GroupsDataGridView.ColumnCount - 1
                If iCol = 1 Or iCol = 2 Then
                    sLine &= Sounder_Groups.Sounder_GroupsDataGridView(iCol, iRow).Value.ToString & ","
                End If
            Next
            sLines &= sLine.Substring(0, sLine.Length - 1) & vbCrLf
        Next
        My.Computer.FileSystem.WriteAllText("C:\testexport.txt", sLines, False) ' generated from right click, snippets

Would really love some help on this. I have no idea how to proceed.

Really wish these things were simpler to use. They have been the bane of my life.