RadPane as UserControl error "Undock"

[Sébastien Chicoine]

Hi,

    I created a Silverlight User Control of type RadPane.

    In the constructor of the MainPage, I've added this control into a RadGroupPanel many times.  When i'm trying to "undock" one of the RadPane, an exception is thrown saying that the LayoutRoot already exist.

    RadPaneTest :

<telerik:RadPane x:Class="PbDocking.RadPaneTest"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    mc:Ignorable="d" Header="RadPaneTest">

  <telerik:RadPane.Content>
    <Grid x:Name="LayoutRoot" Background="White">
      <TextBlock x:Name="TxtText" Text="Message !!"  HorizontalAlignment="Center" VerticalAlignment="Center" FontWeight="Bold"/>
    </Grid>
  </telerik:RadPane.Content>
</telerik:RadPane>

MainPage.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Telerik.Windows.Controls;
using Telerik.Windows.Controls.Docking;

namespace PbDocking
{
  public partial class MainPage : UserControl
  {
    RadDocking radDocking;
    DocumentHost documentHost;
    RadSplitContainer radSplitContainer;
    RadPaneGroup radPaneGroup;

    public MainPage()
    {
      radDocking = new RadDocking();
      documentHost = new DocumentHost();
      radSplitContainer = new RadSplitContainer();
      radPaneGroup = new RadPaneGroup();

      for (int i = 0; i < 10; ++i)
      {
        RadPaneTest rpt = new RadPaneTest();
        rpt.TxtText.Text = "Message " + i.ToString() + " !";
        radPaneGroup.AddItem(rpt, DockPosition.Center);
      }

      radSplitContainer.Items.Add(radPaneGroup);
      documentHost.AddSplitItem(radSplitContainer);
      radDocking.DocumentHost = documentHost;

      this.Content = radDocking;

    }
  }
}

    Can you tell me what i'm doing wrong ?

Thanks.

Sébastien Chicoine

[Konstantina]

Hello Sébastien,

Thank you for the code snippets, they helped a lot.

The problem is in the x:Name-s of the Grid and the TextBox. The RadPane does not create its own namescope like the UserControl and that is causing the error. If you remove the x:Name of the Grid and TextBox it will work as expected.

Hope this information helps. Please let us know if you have any other questions.

Regards,
Konstantina
the Telerik team

[Sébastien Chicoine]

Hello,

    So, if I want to reach my control's childrens from an other class, the best solution is to create them programmatically and avoid the use of x:name ?

Sébastien Chicoine

[Konstantina]

Hi Sébastien,

Yes, that is correct. Since the RadPane doesn't create its own namescope this is the best solution.

All the best,
Konstantina
the Telerik team