Unhide a datacolumn

[Shannee]

I want to add a column filter for my datagrid.
I'm using check boxes, so when a column name is unchecked, the column will be hidden and vise versa.

my problem is that i cant get the column to unhide (when checking the checkbox)

i use the following code:

  Private Sub changeColumnsVis(ByRef list As ArrayList, ByVal hideFlag As Boolean)

        Dim mappingTypeFlag As System.data.MappingType
        If hideFlag = False Then
            mappingTypeFlag = MappingType.Element
        Else
            mappingTypeFlag = MappingType.Hidden
        End If

        For Each hideMe As String In list
            If Me.containsColumn(hideMe) Then
                Dim column As DataColumn = Me.getColumn(hideMe)
                column.ColumnMapping = mappingTypeFlag
            End If
        Next

       DataGrid1.DataSource = dv
    End Sub

I'm able to hide the column, but not to make it visible again.
does anyone has any idea?

 

[Shannee]

solved

I had to add
DataGrid1.SetDataBinding(ds, "Categories")
before the last row of the function.

Yay!