How to reorder columns in a datagrid Dynamically?

Question

I am using autogeneratecolumns ="false" and using some template fields.

It works when I use:

tempColumnNew = Me.DataGrid.Columns(oldColIndex)
tempColumnOld = Me.DataGrid.Columns(newColIndex)

Me.DataGrid.Columns.RemoveAt(oldColIndex)
Me.DataGrid.Columns.RemoveAt(newColIndex)

Me.DataGrid.Columns.AddAt(oldColIndex, tempColumnOld)
Me.DataGrid.Columns.AddAt(newColIndex, tempColumnNew)

But it doesnt remember the added columns on postback, so I have to add them for every postback.

Is there a better way to implement it?

Answer 1

Are you using IsPostBack on the Page_Load event?

If Not IsPostBack Then
  tempColumnNew = Me.DataGrid.Columns(oldColIndex)
  tempColumnOld = Me.DataGrid.Columns(newColIndex)

  Me.DataGrid.Columns.RemoveAt(oldColIndex)
  Me.DataGrid.Columns.RemoveAt(newColIndex)

  Me.DataGrid.Columns.AddAt(oldColIndex, tempColumnOld)
  Me.DataGrid.Columns.AddAt(newColIndex, tempColumnNew)
End If