Im trying to host Magtek card reader into WPF, so i encapsulated their demo into a Windows forms user control, when i use the dll from this control in a Windows application, it works fine, but when used in WPF it gives this error:
Could not load file or assembly 'Interop.ctlUSBHID, Version=1.3.0.0,
Culture=neutral, PublicKeyToken=null' or one of its dependencies. The
system cannot find the file specified.
My code:
xmlns:mcl="clr-namespace:CardReader;assembly=CardReader"
<WindowsFormsHost Name="wfh"
DockPanel.Dock="Top"
Height="300">
<mcl:Reader Name="_Reader"/>
</WindowsFormsHost>
Your help is much appreciated
Have you referred the assemblies,
WindowsFormsIntegration and
System.Windows.Forms
in your wpf application?
What worked for me was removing the Interop.ctlUSBHID file from project's References. This file is not supposed to be added manually in references as it will be generated automatically by ctlUSBHID.dll while code compilation.
Related
I am currently developing a default WPF control Kit.
But I am stuck with using the correct kind of uri in xaml.
What I have is an image wich should be used as the background for the non-client area of my window.
To make the default controls available very easy I want to put everything in a dll.
Other apps can quickly reference that dll and get access to the style.
The problem is, that my image is not showing up when using the dll style in an app.
My image (/Resources/WindowBackground.jpg) is set to Resource and I am using the following xaml:
<Image Grid.ColumnSpan="99" Grid.RowSpan="99">
<Image.OpacityMask>
<ImageBrush ImageSource="pack://application:,,,/Resources/WindowBackground.jpg"/>
</Image.OpacityMask>
</Image>
I also tried:
<Image Grid.ColumnSpan="99" Grid.RowSpan="99" Source="/Resources/WindowBackground.jpg"/>
Both write the following into the output (Couple times):
..."System.IO.IOException" in PresentationFramework.dll...
I also tried lots of other uris wich sometimes lead to XamlParseExeptions and other not so nice stuff.
Thank you for any hints :D
You can find your answer in the Pack URIs in WPF page on MSDN. For your particular situation, you can use the following syntax to reference your resource image file:
pack://application:,,,/ReferencedAssembly;component/Resources/WindowBackground.jpg
From the linked page:
The following example shows the pack URI for a XAML resource file that is located in a subfolder of the referenced assembly's project folder.
pack://application:,,,/ReferencedAssembly;component/Subfolder/ResourceFile.xaml
Note: The type of resource file here is irrelevant.
I am using a base Window class in a WPF project. In the code behind C# file the assembly to the base type is referenced and fine. In the XAML is looks like this:
<MyNamespace:WindowBase x:Class="MyNamespace.Applications.UserInterface.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:MyNamespace="clr-namespace:MyNamespace.Somewhere;assembly=MyNamespace.Common"
Title="MainWindow" Height="350" Width="525">
<Grid>
</Grid>
The solution compiles fine and I can run it. I just can't use the designer in VS 2010. It throws the following exception: The type'MyNameSpace:WindowBase' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built.
Well. they have been. I can't understand what this issue is. This particular base class is used in other projects just fine. I grabbed it for a new project and I can't use the designer. Very frustrating.
Found this problem just recently (this answer upgraded from a comment).
If you copy the dll from a network path, you must right click on the file in Windows Explorer, select Properties, then 'unblock'; there is a hidden NTFS stream associated with the file, and many files when you download from the 'net or copy from a network path, for security reasons.
Only the designer complains, yet the project builds and runs fine: weird isn't it?!
Whenever the designer is acting up against me - the first thing I do is clear the obj-folders in the project and rebuild. Sometimes they seem to go out of sync for some reason (usually when I'm drag-dropping a lot of files and renaming visual items).
I dont't know if its the same issue but in VS2008 I tried to make abstract UserControls but had to change this because the designer didnt't support any abstract base classes (however the solution was compilable and also worked as excpected).
Fixed. The library that contained my base class resided on a drive on the network that I did not have permissions to. That seemed to have no affect on VS 2008 as it worked, but VS 2010 apparently took exception to that when the designer tried to load it. Weird.
I'm currently trying to customize a Visual Studio Isolated Shell so it opens a XAML file and its designer without a solution or a project. Therefore, for the designer to load, Visual Studio need to recognize every xaml tag in the XAML file or it won't load telling me that the document contains errors.
I'm currently trying to manually load an assembly from Telerik's control set (RadControls) without a reference since I need to use the designer without a solution/project.
Is it possible to manually load an assembly in XAML from a "custom" .dll like Telerik's without a VS project reference so the custom controls from the assembly are recognized by Visual Studio at design time (in order to use the WPF designer)?
Thanks!
SatixX
maybe you can read the namespace references out and try to resolve the assemblies in GAC and/or any other location (think of standard paths .NET itselfs looks for assemblies). Then try to load them with reflection. Afterwards you then could try to load the XAML. But: if an assembly isn't found, you should throw an error and stop loading the XAML. Also, considering an appdomain might be well suited because you can unload it again.
-sa
I have a custom WPF UserControl in a DLL file. I access the UserControl from PowerBuilder via OleObject (COM). I'm trying to create an instance of the UserControl (code in .NET dll).
Everything works fine when I'm using it via COM from C++, but in PowerBuilder, I'm getting this error message:
Error Message
Can you help me to figure out, what the problem is?
Tell me, if you need some more information.
Thank you so much!!
Found the solution. :)
Had to load the assembly WPFToolkit.dll and System.Windows.Controls.DataVisualization.Toolkit.dll manually via Assembly.LoadFrom("...");
Now it works!
I think you will have to load all assemblies which contain custom classes which are used in the xaml this way.
i have a project that i am doing and i need to share the code between silverlight and WPF Assembly problem is that even though the wpf assembly is the owner of that file
and the silverlight assembly only has a link to the file, all of the build actions are page everything is correct. if i make the silverlight assembly the owner then silverlight works and wpf doesnt, and currently with wpf being the owner i dont get any errors at all it just never styles the control like it cannot find it..
Note: both projects exists in the same solution.
this scenario builds and runs fine
wpf project
|__Themes
|__Generic.xaml
|__SomeControl.cs
this scenario builds and runs but will not display the control
if i change them from linked to normal it will work fine.
i just want to share this source code and not have multiple versions of the same file floating around.
SilverlightProject
|__Themes
|__"Linked"Generic.xaml
|__"Linked"SomeControl.cs
sorry for my corny Tree view representation
+++++++ UPDATE +++++++++
i have noticed when using any linked file regardless of if it is silverlight or WPF
the link file will not build into the Themes folder in the resource only the root.
i used reflector to see where my resources ended up after compilation of the assembly including the linked file and they ended up in the root , so with that being said. is there a way to prevent this or a fix for this if this is indeed non intended behavior .
i would really love to get this figured out as it has been driving me insane for a while now.
Silverlight XAML and WPF XAML do not have the same namespace - so they aren't directly reusable.
My mistake - you're right - now with Silverlight 3 the namespaces are the same:
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml
What is the Build Action in the Property Pane for the XAML?