Drag drop treeviewitem header text to TextBox

Question

 

Hello,

 

I have a WPF application with a TreeView control and a TextBox control. I am struggling with dragging the treeviewitem header text into the textbox at the cursor location. I believe all WPF controls have the AllowDrop property set to true. What events will I have to implement to drag "item1" string and drop it on the textbox?

 

<TreeView Name="treeview1">

<TreeViewItem Header="Root">

<TreeViewItem Header ="item1">

</TreeViewItem>

<TreeViewItem Header="item2">

</TreeViewItem>

<TreeViewItem Header="item3">

</TreeViewItem>

<TreeViewItem>

</TreeView>

 

Thanks and Regards,

Sheetal

Answer 1

The following code works pretty well for me:

Code Snippet

<Grid>
  <Grid.ColumnDefinitions>
    <ColumnDefinition/>
    <ColumnDefinition/>
  </Grid.ColumnDefinitions>
  <TreeView
      Grid.Column="0"
      Name="treeview1"
      TreeViewItem.PreviewMouseLeftButtonDown="TreeViewItem_PreviewMouseLeftButtonDown">
    <TreeViewItem Header="Root">
      <TreeViewItem Header="item1"/>
      <TreeViewItem Header="item2"/>
      <TreeViewItem Header="item3"/>
    </TreeViewItem>
  </TreeView>
  <TextBox Grid.Column="1" Name="textBox" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>
</Grid>

private void TreeViewItem_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    TreeViewItem item = e.Source as TreeViewItem;
    if (item != null)
    {
        DataObject dataObject = new DataObject();
        dataObject.SetData(DataFormats.StringFormat, item.Header.ToString());
        DragDrop.DoDragDrop(item, dataObject, DragDropEffects.Copy);
    }
}

Hope this helps