如何将列表视图中的所有选定项目拖动到C＃中的另一个列表视图 [英] How to drag all the selected items from a listview to another listview in C#

问题描述

ListView sourcelistview = null;
ListView targetlistview = null;
Point startPoint;

public Window1()
{
    InitializeComponent();
    lbOne.Items.Add("xxxx");
    lbOne.Items.Add("yyyy");
    lbOne.Items.Add("zzzz");
    lbOne.Items.Add("uuuu");
    lbOne.Items.Add("vvvv");
    lbOne.Items.Add("wwww");
    lbOne.Items.Add("rrrr");
    lbOne.Items.Add("ssss");
}

private void lbOne_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    startPoint = e.GetPosition(null);
}

private void lbTwo_Drop(object sender, DragEventArgs e)
{

    targetlistview = (ListView)sender;
        var Sourcedata = sourcelistview.SelectedItems.Cast<object>().ToArray();
        foreach (string item in Sourcedata)
        {
            targetlistview.Items.Add(item);
            sourcelistview.Items.Remove(item);
        }
}

private void lbOne_MouseMove(object sender, MouseEventArgs e)
{
    Point mousePos = e.GetPosition(null);
    Vector diff = startPoint - mousePos;

    if (e.LeftButton == MouseButtonState.Pressed && Math.Abs(diff.X) > SystemParameters.MinimumVerticalDragDistance)
    {
        {
            sourcelistview = (ListView)sender;
            DragDrop.DoDragDrop(sourcelistview, sourcelistview.SelectedItems.ToString(), DragDropEffects.Copy);
        }
    }
}

这适用于单个事件拖动，但当我尝试拖动多个事件时，我选择的最后一个项目被取消选择，其他项目被移动。任何解决方案？

This works for single event drag, but when I attempt to drag multiple events, the last item I select gets deselected and other items are moved. Any solution for this?

推荐答案

CodeProject（在这种情况下，Josh Smith，WPF大师）是你的朋友：在WPF ListView中拖放项目[ ^ ]。



而且，Nick Polyak可以帮助你进行多选拖放：WPF中的MultiSelect拖放[ ^ ]。

CodeProject (in this case Josh Smith, WPF guru) is your friend: "Drag and Drop Items in a WPF ListView" [^].

And, Nick Polyak is here to help you with multi-select drag/drop: "MultiSelect Drag and Drop in WPF" [^].

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