I can't for the life of me work out what I am doing wrong here, despite much searching on SO/Google.
Basically I have a simple DataTable which is held in ViewState and adjusted during postbacks. When I try to write out the values, it is just an empty string. Please find below an abbreviated example of what I have - the output in this case just winds up as a string of apostrophes (one for each execution) so it looks as though the rows are being added, but the ("Product") column is empty.
Thanks for your help.
Dim dtItems As New DataTable
If ViewState("Items") Is Nothing Then
Dim dcColumn As DataColumn
dcColumn = New DataColumn()
dcColumn.DataType = Type.GetType("System.String")
dcColumn.ColumnName = "Product"
dtItems.Columns.Add(dcColumn)
ViewState("Items") = dtItems
End If
dtItems = CType(ViewState("Items"), DataTable)
Dim drRow As DataRow
drRow = dtItems.NewRow()
drRow("Product") = "The Product"
dtItems.Rows.Add()
For Each drRow In dtItems.Rows
txtTestDT.Text += drRow(("Product")).ToString & "!"
Next