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POIn XAML, What is the correct XML namespace for VisualStateManager?
 

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    <p>I'm trying to restyle a few ToggleButtons. Apparently I cannot simply set the background to a new color, because there is a "Control Template" that provides the ToggleButton's visual behavior. So what I need to do is specify in XAML a replacement "ControlTemplate" for the ToggleButton that provides different visual behavior, beyond the simple background color.<br> <strong>Q1</strong>. Is this correct? </p> <hr> <p>I figured to start with the "default" controltemplate for the ToggleButton, which I grabbed <a href="http://msdn.microsoft.com/en-us/library/cc296245%28v=VS.95%29.aspx" rel="nofollow noreferrer">from here</a>, and then modify it. Actually that is the default ControlTemplate for Silverlight, I guess, and I am not using Silverlight, I'm using WPF. But... <a href="http://msdn.microsoft.com/en-us/library/ff468212.aspx" rel="nofollow noreferrer">The corresponding doc page for WPF</a> does not include a specification of the default controltemplate. It provides "a" ControlTemplate, which is not what I want.<br> <strong>Q2</strong>. I'm not sure if it matters that I am using the thing from Silverlight. Does it?</p> <hr> <p>In the Silverlight example, there is an XML namespace prefix of of vsm applied to the VisualStateManager. Apparently the xml namespace is </p> <pre><code> xmlns:vsm = "clr-namespace:System.Windows;assembly=System.Windows" </code></pre> <p>... but somewhere else I read that this XML namespace "is no longer necessary." </p> <p>This is all very very confusing. </p> <p>In the Googlespace, <a href="http://www.codeproject.com/KB/smart/SongBird.aspx" rel="nofollow noreferrer">there are references to something called "The WPF toolkit"</a> which I have had prior exposure to - <a href="https://stackoverflow.com/q/2338690/48082">I used it for an autocomplete textbox</a> prior to the release of WPF V4. I am guessing that some of the WPF Toolkit stuff was rolled into WPF for .NET v4.0, and that is why I no longer have to specify the WPF toolkit.<br> <strong>Q3</strong>. If someone could confirm that understanding I'd appreciate it.</p> <hr> <p>Ok, now starting with the "default" ControlTemplate for ToggleButton, my first step was to compile it, before making any changes. It does not compile, failing with</p> <blockquote> <p>c:\dev...\ToggleButtonStyle1.xaml(23,14): error MC3074: The tag 'VisualStateManager.VisualStateGroups' does not exist in XML namespace '<a href="http://schemas.microsoft.com/winfx/2006/xaml/presentation" rel="nofollow noreferrer">http://schemas.microsoft.com/winfx/2006/xaml/presentation</a>'. Line 23 Position 14. </p> </blockquote> <p>Clear enough. I then looked at the documentation for specifying VisualStateManager in XAML. It, confusingly enough, specifies two xml namespaces, one of them is the one I actually used. </p> <p><img src="https://i.stack.imgur.com/PiCjj.png" alt="enter image description here"></p> <p><strong>Q4</strong> Um, which of these am I supposed to use? One of them, I DID use, and it didn't work. The documentation is completely unclear on what it means to specify <em>TWO XML namespaces</em>. (off with their heads!)</p> <p>I have a reference to PresentationFramework.dll in the project file: </p> <pre><code> &lt;ItemGroup&gt; .... &lt;Reference Include="PresentationFramework" /&gt; &lt;/ItemGroup&gt; </code></pre> <p>I am not using Visual Studio here; I'm using a text editor. I want to understand how it works, not what buttons to push. </p> <p>Thanks for any help y'all can provide.</p> <hr> <p>Just a side comment - this all seems very very complicated. All I want to do is change the color of a ToggleButton when it is ON. It really shouldn't be this complicated. </p>
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