Vista - getting baml exception regularly...

Hello

I am getting a baml exception every time a use a control inside my code
behind file. For ex consider this xaml code :

<Window x:Class="WindowsApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/avalon/2005"
xmlns:x="http://schemas.microsoft.com/winfx/xaml/2005"
Title="WindowsApplication1" Width="550" Height="400">
<Window.Resources>
<!-- define the XML data source as a resource -->
<XmlDataProvider x:Key="BookmarkData" Source="XMLFile1.xml"
XPath="/Favorites">

</XmlDataProvider>

<!-- create a data template to display the desired XML node values
-->
<DataTemplate x:Key="BookmarkDataTemplate">
<StackPanel Margin="5">
<TextBlock FontSize="12" FontWeight="Bold" Foreground="White">
<TextBlock.Text>
<Binding XPath="Title"/>
</TextBlock.Text>
</TextBlock>
<TextBlock FontSize="10" Foreground="LightGray">
<TextBlock.Text>
<Binding XPath="URL"/>
</TextBlock.Text>
</TextBlock>
</StackPanel>
</DataTemplate>
</Window.Resources>

<!-- write the data to the screen by binding the data template to a
list box -->
<StackPanel>
<TextBlock FontSize="14" FontWeight="Bold" Margin="10">My
Favorites</TextBlock>
<ListBox x:Name="listbox1"
BorderThickness="2"
BorderBrush="White"
Margin="10"
ItemsSource="{Binding Source={StaticResource BookmarkData},
XPath=Bookmark}"
ItemTemplate="{StaticResource BookmarkDataTemplate}"/>
</StackPanel>

</Window>

And see the code behind file :

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;


namespace WindowsApplication1
{
/// <summary>
/// Interaction logic for Window1.xaml
/// </summary>

public partial class Window1 : Window
{
//int [] values;
public Window1()
{
// values=new int[10];
InitializeComponent();

// int i=listbox1.Items.Count;

}


}
}

Every time I uncomment this line // int i=listbox1.Items.Count;
I get a baml exception ....

Can anyone help me....

I think you can write an event handler which will hooks up to Window's
Loaded event, and put that line of code into this event handler:
for instance:
in xaml, you do this:
<Window Loaded="WindowLoadedEventHandler">
and in code you do this:
private void WindowLoadedEventHandler(Object sender, RoutedEventArgs e)
{
// int i=listbox1.Items.Count;
}

Sheva
"madhur" <ahuja.madhur@gmail.com> wrote in message
news:1141640410.933322.18340@u72g2000cwu.googlegroups.com...
> Hello
>
> I am getting a baml exception every time a use a control inside my code
> behind file. For ex consider this xaml code :
>
> <Window x:Class="WindowsApplication1.Window1"
> xmlns="http://schemas.microsoft.com/winfx/avalon/2005"
> xmlns:x="http://schemas.microsoft.com/winfx/xaml/2005"
> Title="WindowsApplication1" Width="550" Height="400">
> <Window.Resources>
> <!-- define the XML data source as a resource -->
> <XmlDataProvider x:Key="BookmarkData" Source="XMLFile1.xml"
> XPath="/Favorites">
>
> </XmlDataProvider>
>
> <!-- create a data template to display the desired XML node values
> -->
> <DataTemplate x:Key="BookmarkDataTemplate">
> <StackPanel Margin="5">
> <TextBlock FontSize="12" FontWeight="Bold" Foreground="White">
> <TextBlock.Text>
> <Binding XPath="Title"/>
> </TextBlock.Text>
> </TextBlock>
> <TextBlock FontSize="10" Foreground="LightGray">
> <TextBlock.Text>
> <Binding XPath="URL"/>
> </TextBlock.Text>
> </TextBlock>
> </StackPanel>
> </DataTemplate>
> </Window.Resources>
>
> <!-- write the data to the screen by binding the data template to a
> list box -->
> <StackPanel>
> <TextBlock FontSize="14" FontWeight="Bold" Margin="10">My
> Favorites</TextBlock>
> <ListBox x:Name="listbox1"
> BorderThickness="2"
> BorderBrush="White"
> Margin="10"
> ItemsSource="{Binding Source={StaticResource BookmarkData},
> XPath=Bookmark}"
> ItemTemplate="{StaticResource BookmarkDataTemplate}"/>
> </StackPanel>
>
> </Window>
>
> And see the code behind file :
>
> using System;
> using System.Windows;
> using System.Windows.Controls;
> using System.Windows.Data;
> using System.Windows.Documents;
> using System.Windows.Media;
> using System.Windows.Media.Imaging;
> using System.Windows.Shapes;
>
>
> namespace WindowsApplication1
> {
> /// <summary>
> /// Interaction logic for Window1.xaml
> /// </summary>
>
> public partial class Window1 : Window
> {
> //int [] values;
> public Window1()
> {
> // values=new int[10];
> InitializeComponent();
>
> // int i=listbox1.Items.Count;
>
> }
>
>
> }
> }
>
> Every time I uncomment this line // int i=listbox1.Items.Count;
> I get a baml exception ....
>
> Can anyone help me....
>

And even then you have to be carefull. I found that many times the controls
haven't been rendered by then. So they do exist but ActualHeight and
ActualWidth might be 0 or NaN.

To force the controls to be drawn and sized at least once you can use
UpdateLayout()
(Don't call that too often!)

--
Erno
----
WPF tutorials: http://blogs.infosupport.com/ernow/articles/1878.aspx


"Sheva" <footballism@gmail.com> wrote in message
news:utdsGnSQGHA.3272@tk2msftngp13.phx.gbl...
>I think you can write an event handler which will hooks up to Window's
>Loaded event, and put that line of code into this event handler:
> for instance:
> in xaml, you do this:
> <Window Loaded="WindowLoadedEventHandler">
> and in code you do this:
> private void WindowLoadedEventHandler(Object sender, RoutedEventArgs e)
> {
> // int i=listbox1.Items.Count;
> }
>
> Sheva
> "madhur" <ahuja.madhur@gmail.com> wrote in message
> news:1141640410.933322.18340@u72g2000cwu.googlegroups.com...
>> Hello
>>
>> I am getting a baml exception every time a use a control inside my code
>> behind file. For ex consider this xaml code :
>>
>> <Window x:Class="WindowsApplication1.Window1"
>> xmlns="http://schemas.microsoft.com/winfx/avalon/2005"
>> xmlns:x="http://schemas.microsoft.com/winfx/xaml/2005"
>> Title="WindowsApplication1" Width="550" Height="400">
>> <Window.Resources>
>> <!-- define the XML data source as a resource -->
>> <XmlDataProvider x:Key="BookmarkData" Source="XMLFile1.xml"
>> XPath="/Favorites">
>>
>> </XmlDataProvider>
>>
>> <!-- create a data template to display the desired XML node values
>> -->
>> <DataTemplate x:Key="BookmarkDataTemplate">
>> <StackPanel Margin="5">
>> <TextBlock FontSize="12" FontWeight="Bold" Foreground="White">
>> <TextBlock.Text>
>> <Binding XPath="Title"/>
>> </TextBlock.Text>
>> </TextBlock>
>> <TextBlock FontSize="10" Foreground="LightGray">
>> <TextBlock.Text>
>> <Binding XPath="URL"/>
>> </TextBlock.Text>
>> </TextBlock>
>> </StackPanel>
>> </DataTemplate>
>> </Window.Resources>
>>
>> <!-- write the data to the screen by binding the data template to a
>> list box -->
>> <StackPanel>
>> <TextBlock FontSize="14" FontWeight="Bold" Margin="10">My
>> Favorites</TextBlock>
>> <ListBox x:Name="listbox1"
>> BorderThickness="2"
>> BorderBrush="White"
>> Margin="10"
>> ItemsSource="{Binding Source={StaticResource BookmarkData},
>> XPath=Bookmark}"
>> ItemTemplate="{StaticResource BookmarkDataTemplate}"/>
>> </StackPanel>
>>
>> </Window>
>>
>> And see the code behind file :
>>
>> using System;
>> using System.Windows;
>> using System.Windows.Controls;
>> using System.Windows.Data;
>> using System.Windows.Documents;
>> using System.Windows.Media;
>> using System.Windows.Media.Imaging;
>> using System.Windows.Shapes;
>>
>>
>> namespace WindowsApplication1
>> {
>> /// <summary>
>> /// Interaction logic for Window1.xaml
>> /// </summary>
>>
>> public partial class Window1 : Window
>> {
>> //int [] values;
>> public Window1()
>> {
>> // values=new int[10];
>> InitializeComponent();
>>
>> // int i=listbox1.Items.Count;
>>
>> }
>>
>>
>> }
>> }
>>
>> Every time I uncomment this line // int i=listbox1.Items.Count;
>> I get a baml exception ....
>>
>> Can anyone help me....
>>
>
>

Thanks!!! that did the trick