ApiInformation.IsEventPresent(String, String) 方法

定义

命名空间:

Windows.Foundation.Metadata

返回 true 或 false 以指示指定类型是否存在指定事件。

public:
 static bool IsEventPresent(Platform::String ^ typeName, Platform::String ^ eventName);

 static bool IsEventPresent(winrt::hstring const& typeName, winrt::hstring const& eventName);

public static bool IsEventPresent(string typeName, string eventName);

function isEventPresent(typeName, eventName)

Public Shared Function IsEventPresent (typeName As String, eventName As String) As Boolean

参数

typeName

String

Platform::String

winrt::hstring

类型的命名空间限定名称。

eventName

String

Platform::String

winrt::hstring

事件的名称。

返回

Boolean

bool

如果类型存在指定的事件，则为 True;否则为 false。

示例

if (Windows.Foundation.Metadata.ApiInformation.IsEventPresent("Windows.Media.Core.AudioTrack", "OpenFailed"))
{
    Debug.WriteLine("Windows.Media.Core.AudioTrack.OpenFailed event found");
}
else
{
    Debug.WriteLine("Windows.Media.Core.AudioTrack.OpenFailed event NOT found");
}