5
我正在测试下面的示例代码,并且每当我尝试运行它时,我都会遇到下面显示的错误。但是,calc.exe进程执行成功,那么句柄如何可能为null或零?我希望你明白我想表达的意思。谢谢!该代码样品来自http://www.mathpirate.net/log/tag/system-windows-automation/Windows用户界面自动化
类型 “System.ArgumentException”的未处理的异常发生在 UIAutomationClient.dll 其他信息:HWND不能IntPtr.Zero或空。
//Launches the Windows Calculator and gets the Main Window's Handle.
Process calculatorProcess = Process.Start("calc.exe");
calculatorProcess.WaitForInputIdle();
IntPtr calculatorWindowHandle = calculatorProcess.MainWindowHandle;
//Here I use a window handle to get an AutomationElement for a specific window.
AutomationElement calculatorElement = AutomationElement.FromHandle(calculatorWindowHandle);
if(calculatorElement == null)
{
throw new Exception("Uh-oh, couldn't find the calculator...");
}
//Walks some of the more interesting properties on the AutomationElement.
Console.WriteLine("--------Element");
Console.WriteLine("AutomationId: {0}", calculatorElement.Current.AutomationId);
Console.WriteLine("Name: {0}", calculatorElement.Current.Name);
Console.WriteLine("ClassName: {0}", calculatorElement.Current.ClassName);
Console.WriteLine("ControlType: {0}", calculatorElement.Current.ControlType.ProgrammaticName);
Console.WriteLine("IsEnabled: {0}", calculatorElement.Current.IsEnabled);
Console.WriteLine("IsOffscreen: {0}", calculatorElement.Current.IsOffscreen);
Console.WriteLine("ProcessId: {0}", calculatorElement.Current.ProcessId);
//Commented out because it requires another library reference. However, it's useful to see that this exists.
//Console.WriteLine("BoundingRectangle: {0}", calculatorElement.Current.BoundingRectangle);
Console.WriteLine("Supported Patterns:");
foreach (AutomationPattern supportedPattern in calculatorElement.GetSupportedPatterns())
{
Console.WriteLine("\t{0}", supportedPattern.ProgrammaticName);
}
如果您使用的是白色,请注意它有几个问题;我发现那些对我目前的项目非常重要。你可以在http://white.codeplex.com/workitem/list/basic – 2010-07-02 02:53:35
看到白色问题列表,这是一个推荐的想法,使用UI自动化进行监控? 我有一个第三方应用程序,其中我想要监视的值和基于这些值,我想要执行一些操作,即UI操作,单击按钮,更改文本字段值等。 至于监视值,我必须单独监视每个控件吗? 谢谢! – user303907 2010-07-02 05:53:07