从列表框拖放到文本框

时间:2013-05-16 09:33:09

标签: c# wpf visual-studio

我认为我有一个非常简单的问题,但我似乎把这个想法弄复杂了,也许有人可以指导我或者帮我一点。

我有一个列表框和文本框,我想将文本从列表框复制到文本框。

我在WPF中的代码如下:

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="465" Width="681">
<Grid>
    <ListBox x:Name="listbox1" HorizontalAlignment="Left" Height="405" Margin="10,10,0,0" VerticalAlignment="Top" Width="208" MouseDown="listbox1_MouseDown">
        <ListBoxItem Content="Gordon"/>
        <ListBoxItem Content="Nico"/>
    </ListBox>
    <TextBox x:Name="textbox1" HorizontalAlignment="Left" Height="405" Margin="289,10,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="364" SpellCheck.IsEnabled="True" Cursor="IBeam" AcceptsReturn="True" AllowDrop="True" DragEnter="textbox1_DragEnter"/>

</Grid>
</Window>

我在C#中的代码如下,这就是我被困住的地方:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication1
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void listbox1_MouseDown(object sender, MouseButtonEventArgs e)
    {
        DragDrop.DoDragDrop(listbox1, listbox1.SelectedItem.ToString(), DragDropEffects.Copy);
    }

    private void textbox1_DragEnter(object sender, DragEventArgs e)
    {
        e.Effects = DragDropEffects.Copy;
    }

    private void textbox1_PreviewDragOver(object sender, DragEventArgs e)
    {
        e.Handled = true;
    }

}
}

提前致谢。

2 个答案:

答案 0 :(得分:1)

请尝试使用:

DragDrop.DoDragDrop( listbox1,
                         lsitbox1.SelectedItem.ToString(),
                         DragDropEffects.Copy);

根据MSDN DragEnter event处理DragEnter控件的Textbox事件

根据MSDN Drop event处理Drop控件的Textbox事件

您还可以另外处理DragOver控件的Textbox事件,以进行更多自定义拖放处理和处理。

您可以在this MSDN文章中找到有关WPF中拖放过程的更多信息。

答案 1 :(得分:0)

这是我的问题的答案,它的工作我只有一个问题。

问题是必须选择一个列表框项目来拖动它,如何在mousedown事件上同时选择和拖动项目而不必先点击它?

C#:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication1
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void listbox1_PreviewMouseDown(object sender, MouseButtonEventArgs e)
    {
        if (listbox1.SelectedItems.Count > 0)
        {
            ListBoxItem mySelectedItem = listbox1.SelectedItem as ListBoxItem;
            if (mySelectedItem != null)
            {
                DragDrop.DoDragDrop(listbox1, mySelectedItem.Content.ToString(), DragDropEffects.Copy);
            }

        }
    }

    private void textbox1_DragEnter(object sender, DragEventArgs e)
    {
        e.Effects = DragDropEffects.Copy;
    }

    private void textbox1_PreviewDragOver(object sender, DragEventArgs e)
    {
        e.Handled = true;
    }

    private void textbox1_Drop(object sender, DragEventArgs e)
    {
        string tstring;
        tstring = e.Data.GetData(DataFormats.StringFormat).ToString();
        textbox1.Text += " " + tstring;
    }

    private void textbox1_PreviewMouseUp(object sender, MouseButtonEventArgs e)
    {

    }


}
}