Where is the documentatio for MC3029 compler error?

Question

Hi,

   I was playing with data binding when I've received this warning

error MC3029: <The type of my application class> member is not valid because it does not have a qualifying type name.

   I surmise this is because System.Windows.Application class is declared partial, but I couldn't find _any_ documentation on this particular compiler error. At the time of this writing the search http://msdn.microsoft.com/en-us/library/default.aspx?q=MC3029 yields no results. I would appreciate knowing more about what this error actually means and it would be good to see this info in MSDN.

 

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WBR O.Z.

Answer 1

I just received this error and I couldn't find it on MSDN.  This forum post is all I could find.

Answer 2

Hi O.Z.,
What is the detailed code in your scenario? can you provide some sample?For your information, here is an analogous post about MC3029 error.
http://stackoverflow.com/questions/1420034/my-resources-in-wpf-xaml

Thanks.
Sincerely.

---

Jim Zhou -MSFT

Answer 3

Here you go, Jim.

The Window, MC3029 happens when compiling it

<Window x:Class="WpfApplication1.Window2"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:WpfApp="clr-namespace:WpfApplication1"
    Title="Window2" Height="300" Width="300">
    <Grid>
        <Button Height="{Binding Source={x:Static WpfApp:App}, Path=Current.ButtonHeight}" Margin="64,29,139,0" Name="button1" VerticalAlignment="Top">Button</Button>
    </Grid>
</Window>

The application's XAML

<Application x:Class="WpfApplication1.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    StartupUri="Window2.xaml">
    <Application.Resources>
         
    </Application.Resources>
</Application>

And the application's XAML.CS

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Windows;

namespace WpfApplication1
{
  /// <summary>
  /// Interaction logic for App.xaml
  /// </summary>
  public partial class App : Application
  {
    double ButtonHeight = 10;
    new App Current
    {
      get
      {
        return (App)Application.Current;
      }
    }
  }
}

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WBR O.Z.

Answer 4

Hi O.Z.,
--><Button Height="{Binding Source={x:Static WpfApp:App}, Path=Current.ButtonHeight}" Margin="64,29,139,0" Name="button1" VerticalAlignment="Top">Button</Button>

I recommend that you create another class and expose a static property to hold the value, and then you can just use the syntax something likk below:

Code snippet:
<YourElement property="{x:Static local:CustomClass.staticProperty}" />

Thanks.
Sincerely.

---

Jim Zhou -MSFT

Answer 5

So I did, thanks. Hopefully this thread will partially compensate the lack of documentation on the compiler error.

---

WBR O.Z.