打开后切换focus/activate另一个应用程序

Question

我添加了“使用 Photoshop 编辑”按钮，并使用以下代码成功打开了带有文件的 Photoshop：

Type PhotoshopType = Type.GetTypeFromProgID("Photoshop.Application");
object PhotoshopInst = Activator.CreateInstance(PhotoshopType);                    
PhotoshopType.InvokeMember("Open", BindingFlags.InvokeMethod, null, PhotoshopInst, new object[1] { "c:\files\image.jpg" });

但我未能激活（聚焦）Photoshop，因此用户不必手动切换。关于如何完成它的任何想法？

Answer 1

这通常是 UIAutomation 技术的 use-case。这是执行此操作的示例 C# 控制台应用程序：

dynamic instance = Activator.CreateInstance(Type.GetTypeFromProgID("Photoshop.Application"));
instance.Open(@"c:\files\image.jpg");

// add a COM reference to "UIAutomationClient"
// uncheck "Embed interop types" in the UIAutomationClient Reference properties (or redeclare the ids manually)
var uia = new UIAutomationClient.CUIAutomation();
var root = uia.GetRootElement();

// find Photoshop window (it's a top level window)
var ps = root.FindFirst(UIAutomationClient.TreeScope.TreeScope_Children,
    uia.CreateAndCondition(
            uia.CreatePropertyCondition(UIAutomationClient.UIA_PropertyIds.UIA_LocalizedControlTypePropertyId, "window"),
            uia.CreatePropertyCondition(UIAutomationClient.UIA_PropertyIds.UIA_ClassNamePropertyId, "Photoshop")
            )
    );

if (ps != null)
{
    // this is not to be confused with Win32's SetFocus API
    // it does a lot more
    ps.SetFocus();
}

要确定如何搜索 Photoshop，您可以使用 Inspect tool from Windows SDK，您将看到如下内容：

其中“本地化控件类型”为“window”，ClassName 为“Photoshop”。

打开后切换focus/activate另一个应用程序

Switch focus/activate another Application after opening it

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