In my wpf application i am trying to use windows form control.... but i am getting an error i.e
Error The type 'WindowsFormsHost' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built.
can any one help me to get it done... the following is my code
c#:code
public Window2()
{
InitializeComponent();
System.Windows.Forms.PictureBox PictureBox1 = new System.Windows.Forms.PictureBox();
windowsFormsHost1.Child = PictureBox1;
PictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(PictureBox1_Paint);
}
xaml:code
<WindowsFormsHost Height="175" HorizontalAlignment="Left" Margin="10,10,0,0" Name="windowsFormsHost1" VerticalAlignment="Top" Width="255" />
Normally when we see an error that says:
The type SomeClass was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built
There could be a few problems. Either that means that we didn't add a reference of the relevant dll to our project, or we didn't import the namespace properly.
To find which dll we need to add a reference to, we normally go to MSDN, searching with the search terms 'SomeClass class'... in your case 'WindowsFormsHost class'. Doing this for the WindowsFormsHost class, we see this:
Note the line that says:
Assembly: WindowsFormsIntegration (in WindowsFormsIntegration.dll)
Looking in the Add Reference dialog in Visual Studio, we can see a dll entry for WindowsFormsIntegration:
So that's how we find out which dll to import. Now, we just need to make sure that we import the namespace properly, either in C#:
using System.Windows.Forms.Integration;
In XAML, you do not need to add an XML Namespace for the WindowsFormsIntegration dll before using the WindowsFormsHost control.
<WindowsFormsHost>
<!-- Some WinForms Control -->
</WindowsFormsHost>
See the WindowsFormsHost Class page on MSDN for more information.
Related
I've hardly tried to use Cognex In-Sight SDK together with WPF app. In the SDK there are some examples but unfortunately only for WinForms. I was wondering that I can make a Host for WinForm control fron Cognex DLL, but with no succes. I've added WinFormsIntegration and also System.Windows.Forms.dll. I added a namespace in XAML:
xmlns:cognex="clr-namespace:Cognex.InSight.Controls.Display;assembly=Cognex.InSight.Controls.Display"
and as well tried to use:
<WindowsFormsHost HorizontalAlignment="Left" Height="244" Margin="314,73,0,0" VerticalAlignment="Top" Width="275">
<cognex:CvsInSightDisplay Name="Display" />
</WindowsFormsHost>
but it throws: The name does not exists in the namespace. Strange, because when typing the exactly the same contol name is suggested.
Is there any other option to get Cognex controls in WPF? OpenAI suggested the file named Cognex.InSight.Controls.Wpf.dll but I can't find it.
Regards. Piotr.
So i have this XAML in a Window and have named the control MyBrowser:
<Grid>
<WindowsFormsHost>
<forms:WebBrowser Name="MyBrowser" ScriptErrorsSuppressed="True"/>
</WindowsFormsHost>
</Grid>
In the code behind im passing the Uri to be displayed.
public partial class AuthWindow2 : Window
{
public AuthWindow2(Uri uri)
{
InitializeComponent();
this.MyBrowser.Url = uri;
}
}
While typing this intellisense finds the controlled named MyBrowser
without any issues but at Build time it says:
'AuthWindow2' does not contain a definition for 'MyBrowser' and no
extension method 'MyBrowser' accepting a first argument of type
'AuthWindow2' could be found (are you missing a using directive or an
assembly reference?)
It seems really basic, but i cant figure out why such a simple thing isnt working.
If i name the Grid or the WindowsFormsHost controls i can access these and build without any errors.
WebBrowser is not a FrameworkElement, hence setting its Name property does not generate a field in your MainWindow class.
You must use x:Name instead of Name to get a generated field:
<forms:WebBrowser x:Name="MyBrowser" .../>
Change Name to x:Name of the WebBrowser
<forms:WebBrowser x:Name="MyBrowser" ScriptErrorsSuppressed="True" />
I cannot set the Button.Visibility = Visibility.Collapsed on any of my buttons.
Below is the xaml
<Button x:Name="createPageButton" Content="Create Page" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="740,75,0,0" Height="61" Width="175" FontSize="24" FontWeight="Bold" Click="CreatePageButton_Click" />
<Button x:Name="TestButton" Content="Button" HorizontalAlignment="Left" Margin="1699,705,0,0" VerticalAlignment="Top" Visibility="Collapsed"/>
In my code behind I try to set the Visibility property.
TestButton.Visibility = Visibility.Visible;
I get the following error msg.
Error CS0176 Member 'Visibility.Visible' cannot be accessed with an instance reference; qualify it with a type name instead
I cannot reproduce your issue with your code above. It worked well on my side with invoking it for example, inside the click event handle.
private void CreatePageButton_Click(object sender, RoutedEventArgs e)
{
TestButton.Visibility = Visibility.Visible;
}
My UWP app version is target build 15063.
Error CS0176 Member 'Visibility.Visible' cannot be accessed with an instance reference; qualify it with a type name instead
But for this error, it seems like you are trying to access static members with instance syntax which is not allowed. Details please reference this similar thread. If you still have issues please upload a minimal reproduced project.
Updated:
If you are using the WindowsTemplateStudio, by default in the template studio blank app, the page doesn't reference the Windows.UI.Xaml namespace (which Visibility class is belong to), so that thrown this error. Just add this reference it will work well.
using Windows.UI.Xaml;
In my case, the cause was due to a conflict in the imports / using namespaces. It seems that I had two namespaces which have the same naming.
To fix this issue, I had to specify the exact class reference: System.Windows.Visibility
<d3:Chart BottomTitle="Argument" LeftTitle="Function">
<d3:LineGraph x:Name="linegraph" Description="Simple linegraph" Stroke="Blue" StrokeThickness="3"/>
</d3:Chart>
This code is on the Home Page of the Dynamic Data Display. I downloaded .dll file and added the reference. Then I add those lines of code shown on the home page to my MainWindow.xaml
I get these errors;
'd3' is an undeclared prefix.
Chart is not supported in a Windows Presentation Foundation (WPF) project.
The namespace prefix "d3" is not defined.
I have no other code to show. This is the whole code because I was at the beginning.
Should I do something with this DynamicDataDisplay.XML file too? I didn't use it so far.
Try add this namespace to your Window/UserControl:
xmlns:d3="http://research.microsoft.com/DynamicDataDisplay/1.0"
in Wpf you have to use "ChartPlotter" instead of "Chart". Chart is only supported in Silverlight.
I'm trying to use a CallMethodAction bound to a control in a WPF Window, using the method from the Prism library samples and documentation. For some reason, the XAML compiler refuses to acknowldge that the Microsoft.Expression.Interactivity.Core namespace even exists. However, I have no problem using the same classes from the same namespace in the code-behind for that view.
In XAML I've tried both the canonical namespaces:
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:ic="http://schemas.microsoft.com/expression/2010/interactions"
as well as the CLR namespace:
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:ic="clr-namespace:Microsoft.Expression.Interactivity.Core;assembly=Microsoft.Expression.Interactions"
The namespace Intellisense pop-up browser displays the first namespace but neither the XML nor CLR namespaces for the second. In either case, the following XAML fails to compile:
<Button HorizontalAlignment="Right" Content="Cancel">
<i:Interaction.Triggers>
<i:EventTrigger EventName="Click">
<ic:CallMethodAction />
</i:EventTrigger>
</i:Interaction.Triggers>
</Button>
It has no problem finding the Interaction.Triggers tag, but complains that the CallMethodAction tag doesn't exist in the specified namespace. In fact, Intellisense on the ic namespace tag acts as if there is no such namespace. However, I do not get the error that the CLR namespace could not be found, which I do if I try to use a non-existant namespace.
However, in the constructor for this window, I can do this:
var x = new Microsoft.Expression.Interactivity.Core.CallMethodAction();
That compiles and runs fine. How is that even possible?
Try removing and re-adding reference to Microsoft.Expression.Interactions.dll and *.Interactivity.dll
It happened to me once but I don't know why. This is the way I solved it.