PerformanceCounterCategory.CategoryHelp 屬性

定義

命名空間:

System.Diagnostics

組件:

System.Diagnostics.PerformanceCounter.dll

套件:

System.Diagnostics.PerformanceCounter v8.0.0

來源:

PerformanceCounterCategory.cs

取得分類的說明文字。

public:
 property System::String ^ CategoryHelp { System::String ^ get(); };

public string CategoryHelp { get; }

member this.CategoryHelp : string

Public ReadOnly Property CategoryHelp As String

屬性值

String

這個分類所測量的效能物件的描述。

例外狀況

InvalidOperationException

CategoryName 屬性為 null。 取得分類說明之前，分類名稱必須先設定。

Win32Exception

對基礎系統 API 的呼叫失敗。

範例

下列程式代碼範例會 PerformanceCounterCategory 使用 PerformanceCounterCategory()建立 。 它會提示使用者輸入 PerformanceCounterCategory 和 計算機名稱，然後從輸入的值設定 CategoryName 和 MachineName 屬性。 然後，它會顯示、 和屬性的值CategoryName，如果無法存取，則會顯示錯誤訊息PerformanceCounterCategory。CategoryHelpMachineName

public static void Main(string[] args)
{
    string categoryName = "";
    string machineName = "";
    PerformanceCounterCategory pcc = new PerformanceCounterCategory();

    // Prompt for fields and set the corresponding properties.
    while (categoryName.Length==0)
    {
        Console.Write("Please enter a non-blank category name: ");
        categoryName = Console.ReadLine().Trim();
        if (categoryName.Length>0)
        {
            pcc.CategoryName = categoryName;
        }
    }
    while (machineName.Length==0)
    {
        Console.Write("Enter a non-blank computer name ['.' for local]: ");
        machineName = Console.ReadLine().Trim();
        if (machineName.Length>0)
        {
            pcc.MachineName = machineName;
        }
    }

    // Display the properties of the PerformanceCounterCategory object.
    try
    {
        Console.WriteLine("  Category:  {0}", pcc.CategoryName);
        Console.WriteLine("  Computer:  {0}", pcc.MachineName);
        Console.WriteLine("  Help text: {0}", pcc.CategoryHelp);
    }
    catch(Exception ex)
    {
        Console.WriteLine("Error getting the properties of the " +
            "PerformanceCounterCategory object:");
        Console.WriteLine(ex.Message);
    }
}

Sub Main(ByVal args() As String)
    Dim categoryName As String = ""
    Dim machineName As String = ""
    Dim pcc As New PerformanceCounterCategory

    ' Prompt for fields and set the corresponding properties.
    While categoryName.Length = 0
        Console.Write("Please enter a non-blank category name: ")
        categoryName = Console.ReadLine().Trim
        If categoryName.Length > 0 Then
            pcc.CategoryName = categoryName
        End If
    End While
    While machineName.Length = 0
        Console.Write( _
            "Enter a non-blank computer name ['.' for local]: ")
        machineName = Console.ReadLine().Trim
        If machineName.Length > 0 Then
            pcc.MachineName = machineName
        End If
    End While

    ' Display the properties of the PerformanceCounterCategory object.
    Try
        Console.WriteLine("  Category:  {0}", pcc.CategoryName)
        Console.WriteLine("  Computer:  {0}", pcc.MachineName)
        Console.WriteLine("  Help text: {0}", pcc.CategoryHelp)
    Catch ex As Exception
        Console.WriteLine("Error getting the properties of the " & _
            "PerformanceCounterCategory object:")
        Console.WriteLine(ex.Message)
    End Try
End Sub

另請參閱

• CategoryName
• MachineName
• PerformanceCounter
• CounterHelp