WPF之实现控件内容拖动
2021-01-22 15:12
标签：state ade 鼠标 resource win alignment form turn get 以下分别记录label、listbox、treeview三个控件的拖动示例： 1.对被拖动控件，实现拖动事件，主要是通过各种鼠标事件，实现DragDrop.DoDragDrop方法。 2.对于需要拖动到的目的控件，需要实现AllowDrop="True" Drop="TargetLabel_Drop" WPF之实现控件内容拖动 标签：state ade 鼠标 resource win alignment form turn get 原文地址：https://www.cnblogs.com/qcst123/p/12071480.html Window.Resources>
Style TargetType="ListBoxItem">
EventSetter Event="PreviewMouseMove" Handler="ListBox_PreviewMouseMove"/>
Style>
Style TargetType="TreeViewItem">
EventSetter Event="PreviewMouseMove" Handler="TreeView_PreviewMouseMove"/>
Style>
Window.Resources>
Grid>
Grid.ColumnDefinitions>
ColumnDefinition Width="7*"/>
ColumnDefinition Width="Auto"/>
ColumnDefinition Width="3*"/>
Grid.ColumnDefinitions>
StackPanel>
Label Name="Label" Margin="5,10" Content="This is Label" MouseDown="Label_MouseDown"/>
ListBox Margin="5,10">
ListBoxItem>000ListBoxItem>
ListBoxItem>111ListBoxItem>
ListBoxItem>222ListBoxItem>
ListBox>
TreeView Name="treeView" Margin="5,10">
TreeViewItem Header="aa">
TreeViewItem Header="00"/>
TreeViewItem Header="11"/>
TreeViewItem Header="22"/>
TreeViewItem>
TreeView>
Button Height="30" Margin="5,10" Name="btn" Content="Rest" Click="btn_Click"/>
StackPanel>
Rectangle Grid.Column="1" Fill="Red" Width="1"/>
Label Name="TargetLabel" Grid.Column="2" Content="Come here" Background="AliceBlue" VerticalContentAlignment="Center" HorizontalContentAlignment="Center" AllowDrop="True" Drop="TargetLabel_Drop"/>
Grid>
private void TargetLabel_Drop(object sender, DragEventArgs e)
{
var txt = e.Data.GetData(DataFormats.Text);
this.TargetLabel.Content = txt;
}
private void btn_Click(object sender, RoutedEventArgs e)
{
this.TargetLabel.Content = "Come here";
}
private void Label_MouseDown(object sender, MouseButtonEventArgs e)
{
DragDrop.DoDragDrop(Label, Label.Content, DragDropEffects.Copy);
}
private void ListBox_PreviewMouseMove(object sender, MouseEventArgs e)
{
var item = sender as ListBoxItem;
DragDrop.DoDragDrop(item, item.Content, DragDropEffects.Copy);
}
private void TreeView_PreviewMouseMove(object sender, MouseEventArgs e)
{
if (e.LeftButton==MouseButtonState.Released)
{
return;
}
var t = sender as TreeView;
var x = this.treeView.SelectedItem;
if (x==null)
{
return;
}
var item = x as TreeViewItem;
DragDrop.DoDragDrop(item, item.Header, DragDropEffects.Copy);
}