WatiN NativeElement.GetElementBounds() - What is the unit of measurement?
- by Brian Schroer
When I'm testing with WatiN, I like to save screenshots. Sometimes I don't really need a picture of the whole browser window though - I just want a picture of the element that I'm testing.
My attempt to save a picture of an element with the code below resulted in a picture of a block box, because elementBounds.Top points to a pixel position way past the bottom of the screen. The elementBounds.Width and .Height values also appear to be about half what they should be.
Is this a WatiN bug, or are these properties in a different unit of measure that I have to convert to pixels somehow?
public static void SaveElementScreenshot
(WatiN.Core.IE ie, WatiN.Core.Element element, string screenshotPath)
{
ScrollIntoView(ie, element);
ie.BringToFront();
var ieClass = (InternetExplorerClass) ie.InternetExplorer;
Rectangle elementBounds = element.NativeElement.GetElementBounds();
int left = ieClass.Left + elementBounds.Left;
int top = ieClass.Top + elementBounds.Top;
int width = elementBounds.Width;
int height = elementBounds.Height;
using (var bitmap = new Bitmap(width, height))
{
using (Graphics graphics = Graphics.FromImage(bitmap))
{
graphics.CopyFromScreen
(new Point(left, top), Point.Empty, new Size(width, height));
}
bitmap.Save(screenshotPath, ImageFormat.Jpeg);
}
}
