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POWhere is the Application.DoEvents() in WPF?
 

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  1. POWhere is the Application.DoEvents() in WPF?
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    <p>I have the following sample code that zooms each time a button is pressed:</p> <p>XAML:</p> <pre><code>&lt;Window x:Class="WpfApplication12.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"&gt; &lt;Canvas x:Name="myCanvas"&gt; &lt;Canvas.LayoutTransform&gt; &lt;ScaleTransform x:Name="myScaleTransform" /&gt; &lt;/Canvas.LayoutTransform&gt; &lt;Button Content="Button" Name="myButton" Canvas.Left="50" Canvas.Top="50" Click="myButton_Click" /&gt; &lt;/Canvas&gt; &lt;/Window&gt; </code></pre> <p>*.cs</p> <pre><code>public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } private void myButton_Click(object sender, RoutedEventArgs e) { Console.WriteLine("scale {0}, location: {1}", myScaleTransform.ScaleX, myCanvas.PointToScreen(GetMyByttonLocation())); myScaleTransform.ScaleX = myScaleTransform.ScaleY = myScaleTransform.ScaleX + 1; Console.WriteLine("scale {0}, location: {1}", myScaleTransform.ScaleX, myCanvas.PointToScreen(GetMyByttonLocation())); } private Point GetMyByttonLocation() { return new Point( Canvas.GetLeft(myButton), Canvas.GetTop(myButton)); } } </code></pre> <p>the output is:</p> <pre><code>scale 1, location: 296;315 scale 2, location: 296;315 scale 2, location: 346;365 scale 3, location: 346;365 scale 3, location: 396;415 scale 4, location: 396;415 </code></pre> <p>as you can see, there is a problem, that I thought solve by using <code>Application.DoEvents();</code> but... it does not exist <em>a priori</em> in .NET 4.</p> <p>What to do?</p>
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    1. COThreading? Application.DoEvents() was the poor man's substitute for writing properly multi-threaded applications and extremely poor practice in any event.
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    2. COI know that is poor and bad, but I prefer something that nothing at all.
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