在Vb.net里实现ListBox之间的托拽,首先要使接受托拽数据的控件的AllowDrop属性设为真。再要处理的就是托拽效果,AllowedEffect是设置托拽的源控件的动作效果,而Effect是设置目标控件的动作。这些东东可以在DragEventArgs Members中查到!
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim i As Int32 For i = 0 To 9 ListBox1.Items.Add("Item " & i) Next ListBox2.AllowDrop = True End Sub
Private Sub ListBox1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ListBox1.MouseDown Dim itemIndex As Integer itemIndex = ListBox1.IndexFromPoint(e.X, e.Y) If itemIndex >= 0 Then ListBox1.DoDragDrop(ListBox1.Items(itemIndex), DragDropEffects.Copy) End If End Sub
Private Sub ListBox2_DragEnter(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles ListBox2.DragEnter If (e.Data.GetDataPresent(DataFormats.Text)) Then e.Effect = DragDropEffects.Copy Else e.Effect = DragDropEffects.None End If End Sub
Private Sub ListBox2_DragDrop(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles ListBox2.DragDrop Dim sItem As String sItem = e.Data.GetData(DataFormats.Text).ToString ListBox2.Items.Add(sItem) ListBox1.Items.RemoveAt(ListBox1.FindString(sItem)) End Sub 
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