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GetBitmap sometimes gets a blank content

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aplicaciones asked on 10 Apr 2018, 08:05 AM

blankcontent.jpeg

Hello,

I haven't found the same situation on the forum.

My scenario is the following one:

In a certain step of my web Automation Test, I need to capture what I am seeing on the web page. That's why I am using the GetBitmap() method.
Most of the times it works but sometimes, I don't know the reason, I get a blank content instead of what I am actually seeing. (Image attached)

Here is my code (is still a work in progress as I haven't made this work perfectly)

System.Drawing.Bitmap browserImage = null;
try
{
Manager.ActiveBrowser.RefreshDomTree();
Manager.ActiveBrowser.WaitUntilReady();

ActiveBrowser.Window.Show();
Manager.ActiveBrowser.Window.WaitForVisibility(true, 5000);
ActiveBrowser.Window.SetActive();
ActiveBrowser.Window.SetFocus();

//Operar sobre la Tabla para ver si con esto se fuerza que tenga el foco aquí
Pages.Atenea0.Table.Focus();
Pages.Atenea0.Table.Click();

ActiveBrowser.ContentWindow.Show();
ActiveBrowser.ContentWindow.SetActive();
ActiveBrowser.ContentWindow.SetFocus();

browserImage = ActiveBrowser.ContentWindow.GetBitmap();

if (browserImage == null)
{
ActiveBrowser.Window.RefreshChildren();
ActiveBrowser.ContentWindow.Show();
ActiveBrowser.ContentWindow.SetActive();
ActiveBrowser.ContentWindow.SetFocus();
browserImage = ActiveBrowser.ContentWindow.GetBitmap();
}
if (browserImage == null)
{

browserImage = ActiveBrowser.Capture();
}

I am a little bit lost as I said most of the times works but it's not acceptable for my goal to have something that randomly fails.
I hope you can help me with this.

Regards,
Sebastian

3 Answers, 1 is accepted

answered on 13 Apr 2018, 09:50 AM

Hello Ivaylo,

Unfortunately, I need to use IE. It's a constraint. So, even though it might work on other browsers it's not an option in my case.

On the other hand, I was able to sort this out (to capture an Image) Net Framework libraries.

Here I put some parts of my code that solve this:

//FoundElement is the element that I am intereted in Capturing
var foundElement = ActiveBrowser.WaitForElement(new HtmlFindExpression(findClauses), 4000, false);
if (foundElement != null)
{
foundElement.Focus();

captureBitmap = CapturarImagenDeElemento(foundElement);

if (captureBitmap != null)
{
IntegrarTasaEnSistema(sufijo, captureBitmap);
}
}
.....

//I use this piece of code instead of foundElement.Capture() or ActiveBrowser.ContentWindow.GetBitmap();

private static Bitmap CapturarImagenDeElemento(Element foundElement)
{
//Creating a Rectangle object which will capture our Current Screen
Rectangle captureRectangle = foundElement.GetRectangle();

//Creating a new Bitmap object
Bitmap captureBitmap = new Bitmap(captureRectangle.Width, captureRectangle.Height, PixelFormat.Format32bppArgb);

//Creating a New Graphics Object
Graphics captureGraphics = Graphics.FromImage(captureBitmap);

// Copying Image from The Screen
captureGraphics.CopyFromScreen(captureRectangle.Left, captureRectangle.Top, 0, 0, captureRectangle.Size);

return captureBitmap;
}

I hope that this could help you to solve the issue or at least to compare behaviors as the last method works fine.

Regards,
Sebastian