wpf 来自 String 的 ImageSource 不起作用？
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ImageSource from String not working?
提问by user1189352
I have a bunch of *.tif images in a folder in my project..which i've also added to my visual studio project in a folder located "Templates\Team Logos"
我的项目中的文件夹中有一堆 *.tif 图像。
now if i set an image source to say:
现在，如果我将图像源设置为：
<Image Name="UL_Team1_Image" Grid.Row="1" Grid.Column="1" Margin="5" Source="Team Logos\ARI.tif"></Image>
That works. But now if i try:
那个有效。但现在如果我尝试：
UL_ImageArr[a].Source = (ImageSource)new ImageSourceConverter().ConvertFromString("Team Logos\ARI.tif");
that doesn't work. What gives? I get a NullReferenceException... but it doesn't make sense to me?
那行不通。是什么赋予了？我得到一个 NullReferenceException ......但对我来说没有意义？
回答by Hamlet Hakobyan
You can use this in your code-behind, I think, it is more faster than using ImageSourceConverter.
您可以在代码隐藏中使用它，我认为它比使用ImageSourceConverter.
BitmapImage bimage = new BitmapImage();
bimage.BeginInit();
bimage.UriSource = new Uri("Team Logos\ARI.tif", UriKind.Relative);
bimage.EndInit();
UL_ImageArr[a].Source = bimage
If you want to use ImageSourceConverteryou must refer to image file by pack-uri:
如果要使用ImageSourceConverter，必须通过pack-uri引用图像文件：
var converter = new ImageSourceConverter();
UL_ImageArr[a].Source =
(ImageSource)converter.ConvertFromString("pack://application:,,,/Team Logos/ARI.tif");
回答by Clemens
In code behind you will usually write the full pack URIto reference image resources.
在后面的代码中，您通常会编写完整的包 URI来引用图像资源。
So you either write
所以你要么写
UL_ImageArr[a].Source = (ImageSource)new ImageSourceConverter().ConvertFromString(
"pack://application:,,,/Team Logos/ARI.tif");
or
或者
UL_ImageArr[a].Source = new BitmapImage(new Uri(
"pack://application:,,,/Team Logos/ARI.tif"));
or
或者
UL_ImageArr[a].Source = BitmapFrame.Create(new Uri(
"pack://application:,,,/Team Logos/ARI.tif"));
回答by Daniel
If you are on WinRt, use this
如果您在WinRt 上，请使用此
string url = "ms-appx:///Assets/placeHolder.png";
return new BitmapImage(new Uri(url));
