Saving and restoring Listview columns settings

[pierre-jean]

I need to save and then restore listview columns settings (mainly column width and column order) when the user changes these settings:
1. How do I save and restore the columns width and order
2. Which event can I use to trap a user's column width and/or order change

I have not found a method like the save and restore layout of the radgridview ..

Thanks in advance
Pierre-Jean

[Dess | Tech Support Engineer, Principal]

Hello Pierre-jean,

Thank you for contacting Telerik Support.

Our RadListView does not support save/load layout functionality similar to the one available for the RadGridView. However, you can handle the ListViewDetailColumn's width changes, by subscribing to the PropertyChanged event and using the following code:

private void col_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
    if (e.PropertyName=="Width")
    {

    }
}

As to the columns reordering, you can use the RadListView.Columns.CollectionChanged event in order to trace changes in columns order.

I hope this information helps. Should you have further questions, I would be glad to help.

Regards,
Desislava
Telerik

[pierre-jean]

Thanks with your help I managed to trap the events and write a save/restore function for the column widths.
However I have not found a solution to save and restore the columns order, this is however not really important to my application.
Regards

[Dess | Tech Support Engineer, Principal]

Hello Pierre-Jean,

Thank you for writing back.

It is possible to handle when columns are being reordered as well via the ColumnDragDropService:

this.radListView1.ViewType = Telerik.WinControls.UI.ListViewType.DetailsView;

DetailListViewElement el = this.radListView1.ListViewElement.ViewElement as DetailListViewElement;
if (el != null)
{
    el.ColumnDragDropService.PreviewDragDrop += ColumnDragDropService_PreviewDragDrop;
}

private void ColumnDragDropService_PreviewDragDrop(object sender, RadDropEventArgs e)
{
    DetailListViewHeaderCellElement target = e.HitTarget as DetailListViewHeaderCellElement;
    DetailListViewHeaderCellElement drag = e.DragInstance as DetailListViewHeaderCellElement;
    if (target != null && drag != null)
    {
        ListViewDetailColumn targetColumn = target.Data;
        ListViewDetailColumn dragColumn = drag.Data;
        int targetColumnIndex = this.radListView1.Columns.IndexOf(targetColumn.Name);
        int dragColumnIndex = this.radListView1.Columns.IndexOf(dragColumn.Name);
    }
}

Thus, you can implement the logic for saving columns order.

Please do not hesitate to contact us if you have any additional questions.

Regards,
Desislava
Telerik

[Brandon]

I have tried using:

Private Sub lvEquip_ColumnWidthChanged(sender As Object, e As PropertyChangedEventArgs)
    If e.PropertyName = "Width" Then
        Dim Ini As New IniFile(GetAppDataPath() & "\dat.ini")
        For I As Integer = 0 To lvEquip.Columns.Count - 1
            Ini.PutVar("Settings", "ColSize_Equip_" & I, lvEquip.Columns(I).Width)
            Settings.ColSize_Equip(I) = lvEquip.Columns(I).Width
        Next
    End If
End Sub

 

With:

AddHandler lvEquip.Columns.PropertyChanged, AddressOf lvEquip_ColumnWidthChanged

 

^^ In the load event.  It does not capture when the width of a column is changed.  I set a breakpoint directly on [If e.PropertyName = "Width" Then] and it never gets hit.  What am I missing?

[Dess | Tech Support Engineer, Principal]

Hello, Brandon,      

If you want to detect when a column's width in RadListView is changed, it is necessary to iterate the Columns collection and subscribe to the PropertyChanged event for each ListViewDetailColumn:  

For Each col As ListViewDetailColumn In Me.RadListView1.Columns
    AddHandler col.PropertyChanged, AddressOf col_PropertyChanged
Next

Private Sub col_PropertyChanged(sender As Object, e As System.ComponentModel.PropertyChangedEventArgs)
    Console.WriteLine(e.PropertyName)
End Sub

I hope this information helps. If you need any further assistance please don't hesitate to contact me. 

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik