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。
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)
{
}
}
}