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POWhy does WPF "height" property behaves like this, when it has "Auto" value?
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2013-10-01T12:33:11.427
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<p>Good afternoon!</p> <p>I hate to bother you guys, but I have little question about the window "height" property in WPF, when it has "Auto" value. Because I want to understand how the things work here. Here is the XAML code:</p> <pre><code><Window x:Class="WpfTest.MainWindow" x:Name="window" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Collapsed and Hidden buttons comparison" Width="500"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition/> <ColumnDefinition/> </Grid.ColumnDefinitions> <StackPanel Height="50" Grid.Column="0" Margin="5,0"> <Button Visibility="Collapsed">This is collapsed button</Button> <Button >Below collapsed button</Button> </StackPanel> <StackPanel Height="50" Grid.Column="1" Margin="5,0"> <Button Visibility="Hidden">This is hidden button</Button> <Button >Below hidden button</Button> </StackPanel> </Grid> </Window> </code></pre> <p>When I use explicit height like:</p> <pre><code>Height="300" </code></pre> <p>or </p> <pre><code> SizeToContent="WidthAndHeight" </code></pre> <p>before width everything is perfect, but when I don't type or delete default height, the window has this strange appearance.</p> <p><img src="https://i.stack.imgur.com/smd69.jpg" alt="enter image description here"></p> <p>In the properties "Height" has value "Auto". And when I use procedural code to get the actualHeight it is 526.</p> <pre><code>MessageBox.Show(Convert.ToString(window.Height),"Height of the window"); </code></pre> <p>Can somebody explain please why window behave like this (I mean from where it takes its Height). Thanks in advance.</p>
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Why does WPF "height" property behaves like this, when it has "Auto" value?
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