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c#wpfcanvasuielement

How to change a value of UIElement

I have a WPF application and Canvas in there. In Canvas I have a Rectangle. How can I change his properties, like Height or Width while program is already processing? Something like: 

int index = 0; 
var childByIndex = canvas.Children[index]; 
childByIndex.SetValue(Height, 15);
Solution

  • You will have to tell which dp of which type you want to set like below:

    ((Rectangle)canvas.Children[index]).SetValue(Rectangle.HeightProperty, 15.0);