WPF: Get Canvas.Left and Top Attached Properties

[Lorenz]

Hi,

I have a requirement where I have to test the position of different Elements.
This position is set in our application using a Parent Cancas as container. Then our custom user controls are placed using Cancas attached properties: "Top" and "Left".

In our test scenario we tried to retrieve this value withe the following code:

var left = userControl.GetAttachedProperty<double>("Canvas", "Left");<br>var top = userControl.GetAttachedProperty<double>("Canvas", "Top");

But this code throw an exception:
[WPF Extension Error] Details: ArtOfTest.WebAii.Silverlight.NoSuchPropertyException: Unable to find attached property owner class 'Canvas'
   bei Telerik.TestingFramework.XamlExtension.ClientServices.GetAttachedPropertyValue(AutomationProperty property, Object obj)
   bei Telerik.TestingFramework.XamlExtension.ClientServices.GetRealProperty(AutomationReference reference, AutomationProperty property)
   bei Telerik.TestingFramework.XamlExtension.ClientProcessor.ProcessCommand(String command)

Do I do something wrong? Is there a way to test the position of UI elements ?

Thanks.
Benoît

[Lorenz]

I think it's possible to use the GetRectangle method by passing the relativeTo element (here it will be my canvas container).

This is not optimal in my case but I could be a workaround. If anybody knows a way to retrieve the Canvas.Left and Canvas.Top properties, please let know.

Thanks.
Benoît

[Boyan Boev]

Hi Benoit,

Your code looks correct. Could you please give us some demo or access to your application so we can try to reproduce the issue and give you a solution.

Also please double check that the property is of type double.

Hope to hear from you soon.

Regards,
Boyan Boev
Telerik

 

 

[Lorenz]

Hi Boyan,

Please find attached a VS solution containing a small WPF application, and some UI Automation tests (in UiAutomationTest.cs):

• When_RetrieveCanvasAttachedProperties

Thanks,
Benoît

[Boyan Boev]

Hi Benoit,

Thank you again for the sample.

You should use this syntax for the canvas:

var left = textblock.GetAttachedProperty<double>("System.Windows.Controls.Canvas", "Left");

Let me know if this helps.

Regards,
Boyan Boev
Telerik

 

 

[Lorenz]

Hi Boyan,

Sorry for my late feedback.
Good news, it works with your syntax!

Kind regards,
Benoît

[Boyan Boev]

Hello Benoit, 

Glad to hear that.

If you need further help please let us know.

Regards,
Boyan Boev
Telerik