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Editorial Team
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Asked: 2026-05-16T03:09:05+00:00

I am trying to create a drop down control that is made up of

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I am trying to create a drop down control that is made up of a text box a button and a treeview control. I can not really find any tutorials on how to create a custom drop down control. I did find a user control that drops down a treeview control (vectorlight), but I want to implement my own custom drop down control.

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1 Answer

  1. Editorial Team

    The answer is to use a popup control like so

      <Popup Name="popupTask" IsOpen="False">
    <Border BorderThickness=".5" CornerRadius="5" BorderBrush="Black" Background="White">
      <sdk:TreeView Grid.Row="1" Height="300" Width="270" Name="treeViewTasks" VerticalAlignment="Top"  SelectedItemChanged="treeViewTasks_SelectedItemChanged" />
    </Border>
  </Popup>

    From the code behind
    if (popupTask.IsOpen)
    {
    popupTask.IsOpen = false;
    }
    else
    {
    popupTask.VerticalOffset = 25;
    popupTask.HorizontalOffset = 0;
    popupTask.IsOpen = true;
    }

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