Question

Can I get the Height and Width of an Image, if it has been Stretched by UniformToFill?

I tried Width and Height properties but they are always NaN.

Answer 1

If you want to know the dimensions of the image control, this is the way:

double theHeight = this.ActualHeight - img.Margin.Top - img.Margin.Bottom;
double theWidth = this.ActualWidth - img.Margin.Left - img.Margin.Right;

(img is the image control name in the code above, and in the codes below)

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And if you want to know actual size of image (before it being stretched) you may try this:

BitmapSource SourceData = (BitmapSource)img.Source;
double imgWidth = SourceData.PixelWidth;
double imgHeight = SourceData.PixelHeight;

(I’ve Found this here)

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Also this will get you the dimensions of image after resizing (But before uniforming):

double actWidth = img.ActualWidth;
double actHeight = img.ActualHeight;

So, one of those variables (actWidth or actHeight) must be equal to image control dimension, and the other will be higher than it.

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Please note that the second and the third codes are not working if you call them in Window_Loaded event, since images are not loaded at that moment. You should use it after everything is loaded.