Completed
Last Updated: 08 Aug 2022 10:24 by ADMIN
Release R3 2022 (LIB 2022.2.808)

Use the attached project and start dragging an item to trigger scrolling. As a result, an error occurs. The attached gif file illustrates the steps.

Workaround: 

Me.RadListView1.ListViewElement.DragDropService = New CustomListViewDragDropService(Me.RadListView1.ListViewElement)

    Public Class CustomListViewDragDropService
        Inherits ListViewDragDropService

        Public Sub New(owner As RadListViewElement)
            MyBase.New(owner)
        End Sub
        Protected Overrides Sub OnPreviewDragOver(e As RadDragOverEventArgs)
            MyBase.OnPreviewDragOver(e)
        End Sub
        Protected Overrides Sub HandleMouseMove(mousePos As Point)
            If Not Me.Initialized Then
                MyBase.HandleMouseMove(mousePos)
            End If

            Dim mi As MethodInfo = GetType(RadDragDropService).GetMethod("DoDrag", BindingFlags.Instance Or BindingFlags.NonPublic)
            mi.Invoke(Me, New Object() {mousePos})

            Dim fi2 As FieldInfo = GetType(RadDragDropService).GetField("beginPoint", BindingFlags.Instance Or BindingFlags.NonPublic)
            fi2.SetValue(Me, mousePos)

            Dim fi As FieldInfo = GetType(ListViewDragDropService).GetField("dragHintWindow", BindingFlags.Instance Or BindingFlags.NonPublic)

            Dim dragHintWindow = fi.GetValue(Me)

            If dragHintWindow Is Nothing AndAlso Me.CanCommit Then
                Me.PrepareDragHint()
            End If

            Me.UpdateDragHintLocation(mousePos)
            Dim viewElement As RadListViewElement = Me.Owner
            Dim item As BaseListViewVisualItem = TryCast(Me.DropTarget, BaseListViewVisualItem)

            If item IsNot Nothing AndAlso item.Data IsNot Nothing AndAlso Not item.Data.Owner.Equals(viewElement) Then
                viewElement = item.Data.Owner
            End If

            Dim clientPos As Point = viewElement.PointFromScreen(mousePos)

            If (clientPos.Y < 0 AndAlso viewElement.ViewElement.Orientation = Orientation.Vertical) OrElse (clientPos.X < 0 AndAlso viewElement.ViewElement.Orientation = Orientation.Horizontal) Then
                viewElement.ViewElement.Scroller.Scrollbar.PerformSmallDecrement(1)
            ElseIf (clientPos.Y > viewElement.Size.Height AndAlso viewElement.ViewElement.Orientation = Orientation.Vertical) OrElse (clientPos.X > viewElement.Size.Width AndAlso viewElement.ViewElement.Orientation = Orientation.Horizontal) Then
                viewElement.ViewElement.Scroller.Scrollbar.PerformSmallIncrement(1)
            End If
        End Sub
    End Class

Completed
Last Updated: 09 Jul 2021 11:20 by ADMIN
Release R3 2021
Created by: Stoyan
Comments: 3
Category: ListView
Type: Bug Report
1

System.NullReferenceException: 'Object reference not set to an instance of an object.' when removing items from the list:

 public Form1()
 {
     InitializeComponent();
     for (var i = 0; i < 30; i++)
     {
         var item = new ListViewDataItem();
         radListView2.Items.Insert(0, item);
         item[0] = i;
         item[1] = i;
         item[2] = i;
         item[3] = i;
     }
 }
private void radButton1_Click(object sender, EventArgs e)
{
    try
    {
        radListView2.BeginUpdate();

        foreach (var lvi in radListView2.Items.ToArray())
        {
            radListView2.Items.Remove(lvi);
           
        }
    }
    finally
    {
        radListView2.EndUpdate();
    }
}

Completed
Last Updated: 23 Dec 2020 16:06 by ADMIN
Release R1 2021
Created by: ASM
Comments: 1
Category: ListView
Type: Bug Report
0

Just to report a little typo in RadListViewElement:

 

Protected Overrides Sub OnCurrecntItemChanged(args As ListViewItemEventArgs)

 

Thanks.

Completed
Last Updated: 15 Jun 2020 09:10 by ADMIN
Release R2 2020 SP1

This problem is even reproducible in our Demo application >> Virtual Grid >> Web service example. You will notice that when you scroll to the bottom, the waiting indicator is not being animated when the DPI scaling is higher than 100%.

If you apply the same gif file in a PictureBox it gets animated when using 150% DPI scaling.

Completed
Last Updated: 19 Mar 2020 14:39 by ADMIN
Release R2 2020 (LIB 2020.1.323)
Completed
Last Updated: 19 Mar 2020 14:38 by ADMIN
Release R2 2020 (LIB 2020.1.323)
The issue can be reproduced if the control is not grouped when deleting the items in the data source.
Completed
Last Updated: 11 Nov 2019 14:17 by ADMIN
Release R1 2020 (LIB 2019.3.1111)

Please refer to the attached sample project and follow the steps illustrated in the gif file.

Note: if the vertical  scrollbar is visible, the editor is activated as expected. 

Workaround:

Me.RadListView1.ItemSize = New Size(200, 30)