If checkbox Checked then add to datatable from Gridview - asp.net

Question

I am trying check whether a checkbox is checked in a gridview and if it is checked to add it to the datatable.
However I am getting an error when the checkbox is unchecked for the row:
There is no row at position 1.
Here is my code:
'Creates a new datatable
Dim dtQuestions As New DataTable("QuestionsData")
'Add columns to datatable
For Each cell As TableCell In example.HeaderRow.Cells
dtQuestions.Columns.Add(cell.Text)
Next
For Each row As GridViewRow In example.Rows
Dim chkTest As CheckBox = CType(row.FindControl("chkTest"), CheckBox)
If chkTest.Checked = True Then
dtQuestions.Rows.Add()
For i As Integer = 0 To row.Cells.Count - 1
Try
dtQuestions.Rows(row.RowIndex)(i) = row.Cells(i).Text
Catch ex As Exception
End Try
Next
Else
'Do not add it to Datatable
End If
Next
I am getting the error on this code:
dtQuestions.Rows(row.RowIndex)(i) = row.Cells(i).Text
I do not know how to fix this.

Answer 1

If you want to add a row to a DataTable you should write this code
For Each row As GridViewRow In example.Rows
Dim chkTest As CheckBox = CType(row.FindControl("chkTest"), CheckBox)
If chkTest.Checked = True Then
Dim tableRow = dtQuestions.NewRow()
For i As Integer = 0 To row.Cells.Count - 1
tableRow(i) = row.Cells(i).Text
Next
dtQuestions.Rows.Add(tableRow)
End If
Next
Notice that I have removed the empty try/catch. Don't do it because it just hides your problems.