Create Radio Button!! - WPF Discussion Boards

Mark Salsbery24-Dec-09 8:39

24-Dec-09 8:39

Here's a version that searches the assembly for the first
instance of a class that implements your interface, and if
found, creates an instance of that class:

IMyInterface myinterfaceobject = null;
Stream sourcestream = ...;
AssemblyPart assemblypart = new AssemblyPart();
Assembly assembly = assemblypart.Load(sourcestream);
foreach (Type t in assembly.GetTypes())
{
    if (null != t.GetInterface("IMyInterface", false))
    {
        myinterfaceobject = assembly.CreateInstance(t.FullName) as IMyInterface;
        break;
    }
}
if (myinterfaceobject != null)
{
    // Do something!
}

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Load dll client side

Adriaan Davel3-Jan-10 22:05

Adriaan Davel

3-Jan-10 22:05

I'm also looking at MEF for this, still not sure if it will work for this (or even how it works Smile | :)

)

____________________________________________________________
Be brave little warrior, be VERY brave

[WPF] XamlParseException ----> The calling thread must be STA

pbalaga22-Dec-09 11:00

pbalaga

22-Dec-09 11:00

Hi,
currently I'm testing a really small WPF app that uses resources
from external sources and at first it appeared to work fine. Now,
magically, it's not even able to load a resource from the same assembly.

The following code:

Uri uri = new Uri("thewinda.xaml", UriKind.Relative);
Window w = Application.LoadComponent(uri) as Window;

causes a XamlParseException with the message:

Cannot create instance of 'thewinda' defined in assembly 'WpfTemplateTry, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. Exception has been thrown by the target of an invocation.  Error in markup file 'thewinda.xaml' Line 1 Position 9.

One of its inner exceptions says:
The calling thread must be STA, because many UI components require this.

This is quite weird as "thewinda.xaml" is a file added to the same project as my application.
I've read this error can be connected with threading/async issues, but I have no idea,
how I could apply this hint to my case.

This is the body of "thewinda.xaml":
<Window x:Class="WpfTemplateTry.thewinda"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300">

</Window>

Re: [WPF] XamlParseException ----> The calling thread must be STA

Mark Salsbery23-Dec-09 7:06

Mark Salsbery

23-Dec-09 7:06

Are you doing the load on a separate thread?

What is the build type set to on the thewinda.xaml file?

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: [WPF] XamlParseException ----> The calling thread must be STA

pbalaga25-Dec-09 3:56

pbalaga

25-Dec-09 3:56

Thanks for your response.

I've managed to overcome the problem, but rather by changing my approach than by understanding what's actually wrong.

I was not loading the mentioned file on a separate thread explicitly. Maybe the system was doing something alike without letting me know.

Anyway, I tried to run that WPF application with a custom Main() method. (I didn't alter the auto-generated entry point file, but created my own basing on WinForms experience.) It was like that:

Main()
{
   DerivedAppClass app = new DerivedAppClass();
   app.Run();
}

DerivedAppClass was located in an external dll as an extension of the WPF's Application class. It's obvious, but seems to be not that straightforward in WPF. After I started following the default scheme(App.xaml + App.xaml.cs), it's working as expected.

Re: [WPF] XamlParseException ----> The calling thread must be STA

Mark Salsbery25-Dec-09 8:02

Mark Salsbery

25-Dec-09 8:02

New threads are MTA by default, but if you need STA you can
specify STA.

On your custom entry point function you can use
STAThreadAttribute:

[STAThread]
Main()
{
   DerivedAppClass app = new DerivedAppClass();
   app.Run();
}

On dynamically created threads you can use the SetApartmentState()
method:

mynewthread.SetApartmentState(ApartmentState.STA);
mynewthread.Start(...);

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: [WPF] XamlParseException ----> The calling thread must be STA

pbalaga25-Dec-09 10:09

pbalaga

25-Dec-09 10:09

Oh, excellent remark. LoadComponent() is working flawlessly from now on.

Thank you for your help and time.

Create Radio Button!!

Sr...Frank22-Dec-09 4:08

Sr...Frank

22-Dec-09 4:08

I am really new for WPF, I am trying to create Radiobuttons,checkbox and textbox control at run time.
Is it possible to create controls at runtime in WPF,if yes then please let me know good link or sample code.
Thanks for taking your time!

I am using C# and VisualStudio2008.

Re: Create Radio Button!!

Mark Salsbery22-Dec-09 5:59

Mark Salsbery

22-Dec-09 5:59

Sr...Frank wrote:
Is it possible to create controls at runtime in WPF

Of course. Elements declared in markup (XAML) are created
just like any other CLR objects.

Sr...Frank wrote:
,if yes then please let me know good link or sample code

//C#

using System.Windows.Controls;
...
RadioButton radiobutton = new RadioButton();
CheckBox checkbox = new CheckBox();
TextBox textbox = new TextBox();

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Create Radio Button!!

Sr...Frank22-Dec-09 6:24

Sr...Frank

22-Dec-09 6:24

How to bound them with windows form in WPF?

Re: Create Radio Button!!

Mark Salsbery23-Dec-09 6:21

Mark Salsbery

23-Dec-09 6:21

Sr...Frank wrote:
How to bound them with windows form in WPF?

I'm not sure what you're asking here...

If you're using Windows Forms, why use WPF controls?

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

ListBox Multi Selection without holding Shift Key?

Member 232448321-Dec-09 20:14

Member 2324483

21-Dec-09 20:14

Hi,

Any trick to select multiple items in WPF listbox without holding shift key? Multiple items should be selected on holding and dragging just left mouse button.

Thanks

Flow Layout versus Fixed Layout

Richard Andrew x6421-Dec-09 13:08

Richard Andrew x64

21-Dec-09 13:08

I'm learning that WPF is all about laying out your controls in a non-fixed fashion to be able to accomodate dynamic content. All well and good.

The application I need to write, however needs to display objects on a map in their precise locations. Does WPF provide enough support for fixed layout of objects so that I can implement my mapping application?

Re: Flow Layout versus Fixed Layout

Aviad P.21-Dec-09 20:05

Aviad P.

21-Dec-09 20:05

You can layout anything in a 'fixed' way by using a combination of the HorizontalAlighment VerticalAlignment and Margin properties, when used inside a Grid or a Canvas panel.

Resources and Deployment - App does not run

cutudi21-Dec-09 3:59

cutudi

21-Dec-09 3:59

Hi..
I created a WPF C# application.
I deployed it to an computer with the .Net 3.5 framework.
When I double-click on the EXE nothing happens.. ANd i have got this error:

EventType : clr20r3 P1 : firstc1.exe P2 : 1.0.0.0
P3 : 4b2f37b0 P4 : presentationframework P5 : 3.0.0.0 P6 : 488f142e
P7 : 6259 P8 : e1 P9 : system.windows.markup.xamlparse.
And i have defined in App.xaml thsi resource for my Main Windows:

<Application x:Class="FirstC1.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="Window1.xaml">
<Application.Resources>
<SolidColorBrush x:Key="base_color" Color="#FF007D5A" />
<SolidColorBrush x:Key="selection" Color="#FF00422F" />

<Style x:Key="chart_border" TargetType="{x:Type Border}">
<Setter Property="BorderBrush" Value="{StaticResource base_color}"/>
<Setter Property="CornerRadius" Value="5"/>
<Setter Property="BorderThickness" Value="2"/>
<Setter Property="Margin" Value="2"/>
<Setter Property="Padding" Value="2"/>
<Setter Property="Background">
<Setter.Value>
<LinearGradientBrush Opacity="0.25" StartPoint="0,0" EndPoint="1,1">
<GradientStop Color="Transparent" Offset="0"/>
<GradientStop Color="{Binding Source={StaticResource base_color},Path=Color}" Offset="1"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
</Style>


<Visibility x:Key="uiVisibilty">
Visible
</Visibility>
<Style TargetType="{x:Type TabItem}" x:Key="tree">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Grid>
<Border
Name="Border"
BorderBrush="Black"
Background="Gold"
BorderThickness="1,1,1,1"
CornerRadius="25,5,0,0">
<ContentPresenter x:Name="ContentSite"
VerticalAlignment="Center"
HorizontalAlignment="Center"
ContentSource="Header"
Margin="12,0,12,0" />

</Border>

</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter TargetName="Border" Property="Background" Value="White" />
</Trigger>
<Trigger Property="IsSelected" Value="False">
<Setter TargetName="Border" Property="Background" Value="LightGray" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<DataTemplate x:Key="FirstCell">
<StackPanel Orientation="Horizontal">
<CheckBox Name="chk1" IsChecked="{Binding Path=IsSelected,
RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListViewItem}}}"/>
</StackPanel>
</DataTemplate>
</Application.Resources>
</Application>

Thanks in advance.

Re: Resources and Deployment - App does not run

Pete O'Hanlon21-Dec-09 4:13

Pete O'Hanlon

21-Dec-09 4:13

And what have Visifire said?

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

My blog | My articles | MoXAML PowerToys | Onyx

Re: Resources and Deployment - App does not run

cutudi21-Dec-09 4:19

cutudi

21-Dec-09 4:19

To use visifire, it's important to create a chart in a constructor or windows before use it in other function in a csharp code. I have so many errors in deploymnt of my application in WPF. Do you think in this case that it's an error in my app.xaml, specifically in a gradientbrush?

System.Net.HttpWebRequest missing members

Siberz21-Dec-09 3:43

Siberz

21-Dec-09 3:43

I am building a Silverlight 3 application using MSBuild. I am attempting to POST data in a HttpWebRequest, and I get error CS1061:
'System.Net.HttpWebRequest' does not contain a definition for 'ContentLength'. Here is a code snippet:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "POST";
// Create POST data and convert it to a byte array.
string postData = "&amp;items=7";
postData += "&amp;data="+String.Format("{0}", recnbr);
postData += "&amp;delay=false";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
request.ContentLength = byteArray.Length; [ERROR HERE]
request.ContentType = "application/x-www-form-urlencoded";

I also get the same error for 'GetRequestStream'.

Searching the Internet, I found no answers. Can anyone help?

Re: System.Net.HttpWebRequest missing members

Mark Salsbery21-Dec-09 13:20

Mark Salsbery

21-Dec-09 13:20

Siberz wrote:
'System.Net.HttpWebRequest' does not contain a definition for 'ContentLength'.

Correct. This property is not available in the
Silverlight .NET Framework. I believe the system sets
this for you based on how much data is written to the
request stream. See the "Remarks" section here:
HttpWebRequest.Headers Property[^]

Siberz wrote:
I also get the same error for 'GetRequestStream'.

You'll need to use BeginGetRequestStream() and EndGetRequestStream()
in Silverlight.

Siberz wrote:
Searching the Internet, I found no answers.

Silverlight Documentation[^]
HttpWebRequest Members[^]

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Translate transform in code

AghaKhan21-Dec-09 1:52

AghaKhan

21-Dec-09 1:52

I have a class which builds cubes.One of its properties is to translate to diffrent part of the screen.
testCube is object of that class.

testCube.Translate = new TranslateTransform3D(0, -1, 1);

I would like to set binding for Translation, but I am having hard time.
Looking the book WPF in Action I found this code for Rotation.

AxisAngleRotation3D angleRot = new AxisAngleRotation3D(new Vector3D(0, 1, 0), 0);
RotateTransform3D rot = new RotateTransform3D(angleRot,new Point3D(-spaceToUseX + (spaceToUseX / 2), 0, -(barWidth / 2)));
Binding rotBind = new Binding("Value");
rotBind.Source = rotateSlider;
BindingOperations.SetBinding(angleRot,
AxisAngleRotation3D.AngleProperty, rotBind);
model.Transform = rot;

I wrote this code, but nothing happends.It runs, with no errors

Binding TransformBindingX = new Binding("CubeUnit");
TransformBindingX.Path = new PropertyPath("Translate.OffsetX");

Binding TransformBindingY = new Binding("CubeUnit");
TransformBindingY.Path = new PropertyPath("Translate.OffsetY");

Binding TransformBindingZ = new Binding("CubeUnit");
TransformBindingZ.Path = new PropertyPath("Translate.OffsetZ");

TranslateTransform3D translateTransform3D = new TranslateTransform3D();
BindingOperations.SetBinding(translateTransform3D, TranslateTransform3D.OffsetXProperty, TransformBindingX);
BindingOperations.SetBinding(translateTransform3D, TranslateTransform3D.OffsetYProperty, TransformBindingY);
BindingOperations.SetBinding(translateTransform3D, TranslateTransform3D.OffsetZProperty, TransformBindingZ);

Any Idea?

Best regards
Agha

Throw Errors while run a wpf animated application

damubooks21-Dec-09 1:46

damubooks

21-Dec-09 1:46

Hai to all,

I am developing a sample animation application. while i run this application it shows the following errors. I don't know why this error was occured. The application usage memory was increases simultaneously while running the application. How to solve this error. If anybody had the solution for this error please reply this post.

System.Windows.Media.Imaging.BitmapSourceSafeMILHandle.ComputeEstimatedSize(IntPtr bitmapObject)
at System.Windows.Media.Imaging.BitmapSourceSafeMILHandle.CalculateSize()
at System.Windows.Media.Imaging.UnmanagedBitmapWrapper..ctor(BitmapSourceSafeMILHandle bitmapSource)
at System.Windows.Media.Effects.BitmapEffect.GetOutput(SafeHandle unmanagedEffect, Int32 index, BitmapEffectRenderContext context)
at System.Windows.Media.Effects.BitmapEffect.GetOutput(BitmapEffectInput input)
at System.Windows.Media.Effects.BitmapEffectState.GetEffectOutput(Visual visual, RenderTargetBitmap& renderBitmap, Matrix worldTransform, Rect windowClip, Matrix& finalTransform)
at System.Windows.Media.Effects.BitmapEffectVisualState.RenderBitmapEffect(Visual visual, Channel channel)
at System.Windows.Media.Effects.BitmapEffectContent.ExecuteRealizationsUpdate()
at System.Windows.Media.RealizationContext.RealizationUpdateSchedule.Execute()
at System.Windows.Media.MediaContext.Render(ICompositionTarget resizedCompositionTarget)
at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.AnimatedRenderMessageHandler(Object resizedCompositionTarget)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
at System.Threading.ExecutionContext.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)
at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.Run()
at System.Windows.Application.RunDispatcher(Object ignore)
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run(Window window)
at System.Windows.Application.Run()
at AnimateApplication.App.Main()

damodharan

Re: Throw Errors while run a wpf animated application

AghaKhan21-Dec-09 6:50

AghaKhan

21-Dec-09 6:50

There are so many types of animations and without more information it looks no one able to help you.
Best regards
Agha

Unable to start debugging.

arun_pk21-Dec-09 0:07

arun_pk

21-Dec-09 0:07

when i try to run my silver light 3 application i m getting the following message
"The Silverlight managed debugging package isn't installed"

pls help me to get out of this mess

Re: Unable to start debugging.

Mark Salsbery21-Dec-09 13:22

Mark Salsbery

21-Dec-09 13:22

Have you installed the Silverlight Tools for
Visual Studio?

Silverlight: Get Started[^]

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Unable to start debugging.

Vimalsoft(Pty) Ltd7-May-10 3:56

Vimalsoft(Pty) Ltd

7-May-10 3:56

No you need the Developer runtime

Vuyiswa Maseko,

Spoted in Daniweb-- Sorry to rant. I hate websites. They are just wierd. They don't behave like normal code.

C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
http://www.vuyiswamaseko.com
vuyiswa@its.co.za
http://www.itsabacus.co.za/itsabacus/

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