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POWPF Canvas.GetLeft() always receive NaN value
 

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  1. POWPF Canvas.GetLeft() always receive NaN value
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    <p>I'm trying to getLeft of a control in WPF. But I always received the NaN value instead of double value. Here is what I'm trying:</p> <p>XAML:</p> <pre><code>&lt;Canvas Canvas.Left="230" Name="cnvSaver"&gt; &lt;Border Focusable="False" BorderBrush="#7FBFA379" BorderThickness="0 1" Width="460" Height="460"&gt; &lt;Canvas Background="#3FFFFFFF" AllowDrop="True" Name="cnvViewerLower" Drop="cnvViewerLower_Drop" Height="460" Width="460"&gt; &lt;/Canvas&gt; &lt;/Border&gt; &lt;Border Focusable="False" Name="borUpper" BorderBrush="#7FBFA379" BorderThickness="1 0"&gt; &lt;Border.RenderTransform&gt; &lt;TranslateTransform x:Name="borUpperTranslate" X="0"/&gt; &lt;/Border.RenderTransform&gt; &lt;Border.Triggers&gt; &lt;EventTrigger RoutedEvent="RadioButton.Checked"&gt; &lt;BeginStoryboard&gt; &lt;Storyboard Name="stbUpperTranslate" Storyboard.TargetName="borUpperTranslate" Storyboard.TargetProperty="X"&gt; &lt;DoubleAnimation RepeatBehavior="Forever" Name="dbaUpperTranslate" From="230" To="0" Duration="0:0:3" AutoReverse="True"/&gt; &lt;/Storyboard&gt; &lt;/BeginStoryboard&gt; &lt;/EventTrigger&gt; &lt;/Border.Triggers&gt; &lt;Canvas Background="#3FEEDBB3" Drop="cnvViewerUpper_Drop" MouseLeftButtonDown="cnvViewerUpper_MouseLeftButtonDown" MouseMove="cnvViewerUpper_MouseMove" MouseLeftButtonUp="cnvViewerUpper_MouseLeftButtonUp" AllowDrop="True" Width="460" Height="460" Name="cnvViewerUpper"&gt;&lt;/Canvas&gt; &lt;/Border&gt; &lt;/Canvas&gt; </code></pre> <p>Code behind C#:</p> <pre><code>Point p = e.GetPosition(cnvSaver); if (x &gt; p.X) { // Move to Left Border br = cnvViewerUpper.Parent as Border; double left = Canvas.GetLeft(br) - Math.Abs(p.X - x); if(left &gt; 0){ Canvas.SetLeft(br, left); } MessageBox.Show("move to left"); } else if (x == p.X) { MessageBox.Show("standing"); } else { // Move to Right double left = Canvas.GetLeft(borUpper); if (left &gt; 0) { Canvas.SetLeft(borUpper, left); } MessageBox.Show("move to right"); } </code></pre> <p>Thanks in advance.</p>
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    1. COHave you seen this post http://stackoverflow.com/questions/669071/canvas-gettop-returning-nan?rq=1 ??
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