WPF: 如何显示原始大小的图像？

我在 WPF 中显示图像时遇到了问题。

这是我的密码:

<Button HorizontalAlignment="Left" Grid.Column="1" Grid.Row="5" Margin="0,5">
<Button.Content>
<StackPanel Orientation="Horizontal" Margin="10,0">
<Image Source="/images/user_add.png" Stretch="None" HorizontalAlignment="Center" VerticalAlignment="Center" Width="24" Height="24" />
<TextBlock Text="添加" />
</StackPanel>
</Button.Content>
</Button>

我有一个原始大小为32 * 32的图像，但当我运行以上代码，图像将拉伸，以填补所有的空间，超出其原始大小。我还将“ Stretch”属性设置为“ None”，但它似乎不起作用。

那么，我该如何解决这个问题呢？ 谢谢！

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Try not specifying width or height, use it like this instead:

<Image Source="/images/user_add.png" Stretch="None" HorizontalAlignment="Center" VerticalAlignment="Center" />
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最佳答案

Here is a similar question. Generally setting Stretch="None" is enough.

It is also very important what DPI has the image set in metadata. It took me quite a while before figuring out that if the image's DPI is different from the monitor's DPI (usually 96), WPF will automatically resize the image, as it tries to be DPI-independent.

EDIT

The MSDN link is broken, here is the new link: MSDN Blog - Blurry Bitmaps. Let's keep the old link around to be used for archive.org, in case the new link stops working also.

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<Image Source="Images/Background.png" UseLayoutRounding="True" SnapsToDevicePixels="True" Width="600" Height="800" Stretch="Fill" />

This one works for me, for an image with 600x800 pixels and 96dpi.

@rishad2m8 If size is unknown one can detect the size first with https://msdn.microsoft.com/en-us/library/system.drawing.image.size(v=vs.110).aspx I'd guess.

小开

Adding to Paya's answer: to compensate WPF's attempt to adapt to the monitors resolution you should be able to set the Width and Height to the file's original dimensions and use Stretch="Fill". This worked for me.

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If you want to display the image with original size, but don't know the image size, I think the best way is to set the image as background of UIElement. Like this:

    <Button Height="100" Width="100">
<Button.Background>
<ImageBrush ImageSource="/images/user_add.png" Stretch="None"/>
</Button.Background>
</Button>

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