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chuckhinds
chuckhinds
Visual Basic Posted: Dec 16, 2009
 

I am using Visual Basic and Visual Studio 2008. I am trying to implement the tree control. I can get the control to appear in the application if I build it in xaml. When I add a event handler (even an a subroutine that does nothing), an exception is thrown from "System.Windows.Navagation.PageResorceContentLoader.EndLoad (IAsyncResult asyncResult). It happens when I add an event handler for any control.


Do you have an idea of what's wrong?


VB Code:


Imports System

Imports System.Collections.Specialized

Imports System.Collections.ObjectModel

Imports System.Collections.Generic

Imports System.Linq

Imports System.Windows

Imports System.Windows.Controls

Imports System.Windows.Documents

Imports System.Windows.Input

Imports System.Windows.Markup

Imports System.Windows.Media

Imports System.Windows.Media.Animation

Imports System.Windows.Shapes

Imports System.Windows.Threading


Imports System.Net

Imports System.IO

Imports System.Text

Imports System.Windows.Resources

Imports System.Windows.Navigation

Imports Liquid

Imports Liquid.Components


Partial Public Class Home

    Inherits Page


    Sub New()

        InitializeComponent()

        Me.Title = ApplicationStrings.HomePageTitle

    End Sub


    Sub Preference_Click(ByRef sender As Object, ByRef e As RoutedEventArgs)

    End Sub


    ''' <summary>

    '''     Executes when the user navigates to this page.

    ''' </summary>

    Protected Overloads Overrides Sub OnNavigatedTo(ByVal e As NavigationEventArgs)

    End Sub

End Class


xaml:

<navigation:Page

  x:Class="Magellan.Home"

  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:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"

  mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480"  

  xmlns:liquidTreeView="clr-namespace:Liquid;assembly=Liquid.TreeView"  

  xmlns:liquid="clr-namespace:Liquid;assembly=Liquid"

  xmlns:liquidPopup="clr-namespace:Liquid;assembly=Liquid.Popup"

  xmlns:liquidRichText="clr-namespace:Liquid;assembly=Liquid.RichText"

    

  Style="{StaticResource PageStyle}">


  <Grid x:Name="LayoutRoot">

    <ScrollViewer x:Name="PageScrollViewer" Style="{StaticResource PageScrollViewerStyle}" >


      <StackPanel x:Name="ContentStackPanel" Style="{StaticResource ContentStackPanelStyle}">


        <TextBlock x:Name="HeaderText" Style="{StaticResource HeaderTextStyle}"

                           Text="{Binding Path=ApplicationStrings.HomePageTitle, Source={StaticResource ResourceWrapper}}"/>

        <TextBlock x:Name="ContentText" Style="{StaticResource ContentTextStyle}"

                           Text="Home page content"/>


      </StackPanel>


    </ScrollViewer>

        <liquid:TextRollerBlind x:Name="preferred" Canvas.Left="155" Canvas.Top="8" Width="130" Height="80" TopText="Preferred" BottomText="Role">

            <StackPanel Orientation="Vertical" Margin="6">

                <RadioButton Content="Senior" GroupName="pref" Checked="Preference_Click" />

                <RadioButton Content="Lead" GroupName="pref" Checked="Preference_Click" />

                <RadioButton Content="Developer" GroupName="pref" Checked="Preference_Click" />

                <RadioButton Content="Other" GroupName="pref" Checked="Preference_Click" />

            </StackPanel>

        </liquid:TextRollerBlind>

      

        <liquidTreeView:Tree x:Name="TownTree" Margin="0,0,0,0" EnableLines="True" HorizontalAlignment="Left" Width="200" Title="Towns">

            <liquidTreeView:Node ID="0" Title="Home Page" Icon="Images/folder.png" IconExpanded="Images/folderOpen.png" BorderThickness="5,0,0,0" Width="165">

                <liquidTreeView:Node ID="100" Title="Container" Icon="Images/folder.png" IconExpanded="Images/folderOpen.png">

                    <liquidTreeView:Node ID="101" Title="Page 1" Icon="Images/doc.png" />

                </liquidTreeView:Node>

                <liquidTreeView:Node ID="1" Title="My Music" Icon="Images/folder.png" IconExpanded="Images/folderOpen.png">

                    <liquidTreeView:Node ID="10" Title="Downloads" Icon="Images/folder.png" IconExpanded="Images/folderOpen.png">

                        <liquidTreeView:Node ID="46" Title="Track 04.mp3" Icon="Images/mp3.png" />

                        <liquidTreeView:Node ID="47" Title="Track 05.mp3" Icon="Images/mp3.png" />

                        <liquidTreeView:Node ID="48" Title="Track 06.mp3" Icon="Images/mp3.png" />

                        <liquidTreeView:Node ID="49" Title="Track 07.mp3" Icon="Images/mp3.png" />

                    </liquidTreeView:Node>

                    <liquidTreeView:Node ID="11" Title="Favourites" Icon="Images/folder.png" IconExpanded="Images/folderOpen.png">

                        <liquidTreeView:Node ID="23" Title="Track 01.mp3" Icon="Images/mp3.png" />

                        <liquidTreeView:Node ID="24" Title="Track 02.mp3" Icon="Images/mp3.png" />

                        <liquidTreeView:Node ID="25" Title="Track 03.mp3" Icon="Images/mp3.png" />

                        <liquidTreeView:Node ID="26" Title="Track 06.mp3" Icon="Images/mp3.png" />

                        <liquidTreeView:Node ID="27" Title="Track 07.mp3" Icon="Images/mp3.png" />

                    </liquidTreeView:Node>

                    <liquidTreeView:Node ID="12" Title="Recent" Icon="Images/folder.png" IconExpanded="Images/folderOpen.png">

                        <liquidTreeView:Node ID="34" Title="Track 02.mp3" Icon="Images/mp3.png" />

                        <liquidTreeView:Node ID="35" Title="Track 03.mp3" Icon="Images/mp3.png" />

                        <liquidTreeView:Node ID="36" Title="Track 04.mp3" Icon="Images/mp3.png" />

                        <liquidTreeView:Node ID="37" Title="Track 06.mp3" Icon="Images/mp3.png" />

                        <liquidTreeView:Node ID="38" Title="Track 07.mp3" Icon="Images/mp3.png" />

                    </liquidTreeView:Node>

                    <liquidTreeView:Node ID="13" Title="Track 01.mp3" Icon="Images/mp3.png" />

                    <liquidTreeView:Node ID="14" Title="Track 02.mp3" Icon="Images/mp3.png" />

                    <liquidTreeView:Node ID="15" Title="Track 03.mp3" Icon="Images/mp3.png" />

                    <liquidTreeView:Node ID="16" Title="Track 04.mp3" Icon="Images/mp3.png" />

                    <liquidTreeView:Node ID="17" Title="Track 05.mp3" Icon="Images/mp3.png" />

                    <liquidTreeView:Node ID="18" Title="Track 06.mp3" Icon="Images/mp3.png" />

                    <liquidTreeView:Node ID="19" Title="Track 07.mp3" Icon="Images/mp3.png" />

                </liquidTreeView:Node>

                <liquidTreeView:Node ID="2" Title="My Pictures" Icon="Images/folder.png" IconExpanded="Images/folderOpen.png">

                    <liquidTreeView:Node ID="59" Title="Image 1.gif" Icon="Images/gif.png" />

                    <liquidTreeView:Node ID="53" Title="Image 2.gif" Icon="Images/gif.png" />

                    <liquidTreeView:Node ID="54" Title="Image 3.gif" Icon="Images/gif.png" />

                    <liquidTreeView:Node ID="55" Title="Image 4.gif" Icon="Images/gif.png" />

                    <liquidTreeView:Node ID="56" Title="Image 5.gif" Icon="Images/gif.png" />

                    <liquidTreeView:Node ID="57" Title="Image 6.gif" Icon="Images/gif.png" />

                    <liquidTreeView:Node ID="58" Title="Image 7.gif" Icon="Images/gif.png" />

                </liquidTreeView:Node>

                <liquidTreeView:Node ID="3" Title="My Videos" Icon="Images/folder.png" IconExpanded="Images/folderOpen.png">

                    <liquidTreeView:Node ID="63" Title="Video 01.mp4" Icon="Images/mp4.png" />

                    <liquidTreeView:Node ID="64" Title="Video 02.mp4" Icon="Images/mp4.png" />

                    <liquidTreeView:Node ID="65" Title="Video 03.mp4" Icon="Images/mp4.png" />

                    <liquidTreeView:Node ID="66" Title="Video 04.mp4" Icon="Images/mp4.png" />

                    <liquidTreeView:Node ID="67" Title="Video 05.mp4" Icon="Images/mp4.png" />

                    <liquidTreeView:Node ID="68" Title="Video 06.mp4" Icon="Images/mp4.png" />

                    <liquidTreeView:Node ID="69" Title="Video 07.mp4" Icon="Images/mp4.png" />

                </liquidTreeView:Node>

                <liquidTreeView:Node ID="8" Title="Connect.xls" Icon="Images/xls.png" />

                <liquidTreeView:Node ID="6" Title="Latest.doc" Icon="Images/doc.png" />

                <liquidTreeView:Node ID="7" Title="Light.doc" Icon="Images/doc.png" />

                <liquidTreeView:Node ID="4" Title="Listing.pdf" Icon="Images/pdf.png" />

                <liquidTreeView:Node ID="5" Title="Update.pdf" Icon="Images/pdf.png" />

            </liquidTreeView:Node>

        </liquidTreeView:Tree>

    </Grid>

</navigation:Page>




  
 
dan
dan
RE: Visual Basic Posted: Dec 24, 2009
 

Hi,


So this happens for when trying to attach any event handler to any control?  Have you tried adding event handlers without the TreeView or the TextRollerBlind?


In terms of the XAML for your TreeView this looks fine.  To find the cause of this problem it may be necessary to remove the controls 1 at a time to find the offending control.


Thanks!

 
 

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