OSFeature.GetVersionPresent(Object) 方法

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

检索当前系统上可用的指定功能的版本。

public:
 override Version ^ GetVersionPresent(System::Object ^ feature);

public override Version? GetVersionPresent (object feature);

override this.GetVersionPresent : obj -> Version

Public Overrides Function GetVersionPresent (feature As Object) As Version

参数

feature

Object

请求其版本的功能，为 LayeredWindows 或 Themes。

返回

Version

Version 表示系统上当前可用的指定操作系统功能的版本；如果找不到该功能，则为 null。

示例

以下示例查询OSFeatureLayeredWindows功能。 检查版本以查看它是否为 null，以确定功能是否存在。 结果显示在文本框中。 此代码假定 textBox1 已创建并放置在窗体上。

private:
   void LayeredWindows()
   {
      // Gets the version of the layered windows feature.
      Version^ myVersion = OSFeature::Feature->GetVersionPresent(
         OSFeature::LayeredWindows );
      
      // Prints whether the feature is available.
      if ( myVersion != nullptr )
      {
         textBox1->Text = "Layered windows feature is installed.\n";
      }
      else
      {
         textBox1->Text = "Layered windows feature is not installed.\n";
      }
   }

private void LayeredWindows() {
   // Gets the version of the layered windows feature.
   Version myVersion =
       OSFeature.Feature.GetVersionPresent(OSFeature.LayeredWindows);

   // Prints whether the feature is available.
   if (myVersion != null)
      textBox1.Text = "Layered windows feature is installed.\n";
   else
      textBox1.Text = "Layered windows feature is not installed.\n";
}

Private Sub LayeredWindows()
    ' Gets the version of the layered windows feature.
    Dim myVersion As Version = _
       OSFeature.Feature.GetVersionPresent(OSFeature.LayeredWindows)
       
    ' Prints whether the feature is available.
    If (myVersion IsNot Nothing) Then
        textBox1.Text = "Layered windows feature is installed." & _
           ControlChars.CrLf
    Else
        textBox1.Text = "Layered windows feature is not installed." & _
           ControlChars.CrLf
    End If
End Sub

注解

Feature使用 属性（static此类中提供的 实例OSFeature）查询功能的版本号。

另请参阅

• Version
• Feature
• FeatureSupport
• LayeredWindows