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9.3

VB.NET: how to drag items from a list box to listview

Asked by andy7789 in VB Controls, Visual Basic Programming, .NET

Hi x-perts,

I need to drag items from a list box to listview. In the code below ListBoxPortAll is a listbox and ListViewPort is a listview.

The above code generates an infinite loop when debugging. what am i doing wrong?

Also, when dragging, I need to check, if the same items exists in the 2nd column of ListView to avoid duplicates. How can I do this?

Thanks 
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Private Sub ListViewPort_DragDrop(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles ListViewPort.DragDrop
            Dim listArr() As String
            Dim itm As ListViewItem
            If sender Is ListBoxPortAll Then
                listArr(0) = "0%"
                listArr(1) = ListBoxPortAll.SelectedItem
                itm = New ListViewItem(listArr)
                ListViewPort.Items.Add(itm)
            End If
 
        End Sub
 
        Private Sub ListViewPort_DragEnter(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles ListViewPort.DragEnter
            If e.Data.GetDataPresent(GetType(ListView.SelectedListViewItemCollection)) Then
                e.Effect = DragDropEffects.Move
            Else
                e.Effect = DragDropEffects.None
            End If
        End Sub
 
        Private Sub ListBoxPortAll_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ListBoxPortAll.MouseDown
            MouseIsDown = True
        End Sub
 
        Private Sub ListBoxPortAll_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ListBoxPortAll.MouseMove
            If MouseIsDown Then
                ' Initiate dragging.
                ListBoxPortAll.DoDragDrop(ListBoxPortAll.Text, DragDropEffects.Copy)
            End If
            MouseIsDown = False
        End Sub
[+][-]08/07/09 01:02 AM, ID: 25040633Accepted Solution

Your question has an Asker Certified™ answer! andy7789 verified that this solution worked for them--which means it will likely work for you, too. Click to view the solution free for 30-days now.

About this solution

Zones: VB Controls, Visual Basic Programming, .NET
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Solution Provided By: jinal
Participating Experts: 1
Solution Grade: A
 
 
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