C# 无法在后面的代码中设置图像源
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Cannot set image source in code behind
提问by KMC
There are numerous questions and answers regarding setting image source in code behind, such as this Setting WPF image source in code.
关于在代码中设置图像源的问题和答案有很多，例如在代码中设置 WPF 图像源。
I have followed all these steps and yet not able to set an image. I code in WPF C# in VS2010. I have all my image files under a folder named "Images" and all the image files are set to Copy always. And Build Actionis set to Resource, as instructed from documentation.
我已遵循所有这些步骤，但无法设置图像。我在 VS2010 中用 WPF C# 编码。我的所有图像文件都位于名为“ Images”的文件夹下，并且所有图像文件都设置为“始终复制”。并生成操作设置为资源，从文档要求。
My code is as follow. I set a dog.pngin XAML and change it to cat.pngin code behind.
我的代码如下。我在 XAML 中设置了一个dog.png并在后面的代码中将其更改为cat.png。
// my XAML
<Image x:Name="imgAnimal" Source="Images/dog.png" />
// my C#
BitmapImage img = new BitmapImage();
img.UriSource = new Uri(@"pack://application:,,,/FooApplication;component/Images/cat.png");
imgAnimal.Source = img;
Then I get a empty, blank image of emptiness. I do not understand why .NET makes setting an image so complicated..w
然后我得到一个空虚的空白图像。我不明白为什么 .NET 使设置图像如此复杂..w
[EDIT]
[编辑]
So the following works
所以下面的作品
imgAnimal.Source = new BitmapImage(new Uri(@"pack://application:,,,/FooApplication;component/Images/cat.png"));
It works, but I do not see any difference between the two code. Why the earlier doesn't work and the latter does? To me they are the same..
它有效，但我看不出这两个代码之间有任何区别。为什么前者不起作用而后者起作用？对我来说他们是一样的..
采纳答案by Marcin
Try following:
尝试以下操作：
imgAnimal.Source = new BitmapImage(new Uri("/FooApplication;component/Images/cat.png", UriKind.Relative));
Default UriKindis Absolute, you should rather use Relativeone.
默认UriKind是Absolute，你应该使用相对的。
[EDIT]
[编辑]
Use BeginInitand EndInit:
使用BeginInit和EndInit：
BitmapImage img = new BitmapImage();
img.BeginInit();
img.UriSource = new Uri(@"pack://application:,,,/FooApplication;component/Images/cat.png");
img.EndInit();
imgAnimal.Source = img;
