CodeDelegate2.IsDerivedFrom 屬性 (String)

發行項
08/12/2011

指出 CodeDelegate2 物件是否具有另一個物件做為基底。

命名空間： EnvDTE80
組件： EnvDTE80 (在 EnvDTE80.dll 中)

語法

'宣告
ReadOnly Property IsDerivedFrom ( _
    FullName As String _
) As Boolean
    Get

bool this[
    string FullName
] { get; }

property bool IsDerivedFrom[String^ FullName] {
    bool get (String^ FullName);
}

abstract IsDerivedFrom : bool

JScript 不支援索引屬性。

參數

FullName
型別：System.String
必要項。要在此委派世系中搜尋的型別。

屬性值

型別：System.Boolean
布林值，如果委派有另一個物件當做基底，則為 true，否則為傳回 false。

實作

CodeDelegate.IsDerivedFrom[String]

備註

注意事項
在特定類型的編輯之後，程式碼模型項目 (例如類別、結構、函式、屬性、委派等) 的值可能不具決定性，表示其值不一定維持相同。如需詳細資訊，請參閱使用程式碼模型探索程式碼 (Visual Basic) 的＜程式碼模型項目值可以變更＞一節。

範例

在執行這個範例之前，請先載入具有類別的專案，並在範例程式碼中插入以下程式碼行。當這個程式碼行和範例程式碼都加入之後，請按一下 [Delegate] 這一行並將插入點置於此，接著再執行這個範例。

[VisualBasic]

Delegate Sub MySubDelegate(ByVal x As Integer)

[C#]

public delegate void MySubDelegate(int x);

[VisualBasic]

Public Sub CodeDelegateExample(ByVal dte As DTE2)
    ' Before running this example, open a code document from a 
    ' project and place the insertion point inside a class 
    ' definition.
    Try
        ' Retrieve the CodeClass at the insertion point.
        Dim sel As TextSelection = _
            CType(DTE.ActiveDocument.Selection, TextSelection)
        Dim del As CodeDelegate2 = _
            CType(sel.ActivePoint.CodeElement( _
        vsCMElement.vsCMElementDelegate), CodeDelegate2)
        Dim elem As CodeElement2
        Dim sb As New System.Text.StringBuilder

        ' Display the baseclass name of the delegate.
        sb.AppendLine("Delegate base class name: " & _
          del.BaseClass.Name)
        sb.AppendLine("Delegate's access: " & del.Access.ToString)
        sb.AppendLine("Children: " & del.Children.Count & "  _
          Name: " & del.Children.Item(1).Name)
        sb.AppendLine("Collection: " & del.Collection.Count)
        sb.AppendLine("Delegates:")
        For Each elem In del.Collection
            sb.AppendLine("    - " & elem.Name)
        Next
        sb.AppendLine("Comment: " & del.Comment)
        sb.AppendLine("Doc Comment: " & del.DocComment)
        sb.AppendLine("DTE Parent: " & del.DTE.Name)
        sb.AppendLine("Endpoint location: " & _
          del.EndPoint.AbsoluteCharOffset)
        sb.AppendLine("Infolocation: " & del.InfoLocation.ToString)
        sb.AppendLine("Can provide CodeType object? " & _
          del.IsCodeType.ToString)
        sb.AppendLine("Is Delegate derived? " & _
          del.IsDerivedFrom("EnvDTE80"))
        sb.AppendLine("Is Delegate a generic? " & del.IsGeneric)
        sb.AppendLine("Kind: " & del.Kind.ToString)
        sb.AppendLine("Authoring language: " & _
          del.Language.ToString)
        sb.AppendLine("Name: " & del.Name)
        sb.AppendLine("Namespace: " + del.Namespace.Name);
        sb.AppendLine("Parameters: " & del.Parameters.Item(1).Name)
        sb.AppendLine("Project containing the delegate: " & _
          del.ProjectItem.Name)
        sb.AppendLine("Prototype for delegate: " & del.Prototype)
        sb.AppendLine("Delegate start point offset: " & _
          del.StartPoint.LineCharOffset)
        sb.AppendLine("Type: " & del.Type.TypeKind.ToString)
        MsgBox(sb.ToString)

    Catch ex As System.Exception
        MsgBox(ex.ToString)
    End Try
End Sub

[C#]

public void CodeDelegateExample(DTE2 DTE)
{
    try
    {
        // Retrieve the CodeClass at the insertion point.
        TextSelection sel = (TextSelection) 
          DTE.ActiveDocument.Selection;
        CodeDelegate2 del = (CodeDelegate2) 
          sel.ActivePoint.get_CodeElement
          (vsCMElement.vsCMElementDelegate);
        System.Text.StringBuilder sb = new System.Text.StringBuilder();
        // Display the baseclass name of the delegate.
        sb.AppendLine("Delegate base class name: " + 
          del.BaseClass.Name);
        sb.AppendLine("Delegate's access: " + del.Access);
        sb.AppendLine("Children: "+del.Children.Count+"  Name: 
          "+del.Children.Item(1).Name);
        sb.AppendLine("Collection: "+del.Collection.Count);
        sb.AppendLine("Delegates:");
        foreach (CodeElement2 elem in del.Collection )
        {
            sb.AppendLine("    - "+elem.Name);
        }
        sb.AppendLine("Comment: "+del.Comment);
        sb.AppendLine("Attributes:"); 
        foreach (CodeElement2 elem in del.Attributes)
        {
            sb.AppendLine("    - " + elem.Name);
        }
        sb.AppendLine("Bases:");
        foreach (CodeElement2 elem in del.Bases)
        {
            sb.AppendLine("    - " + elem.Name);
        } 
        sb.AppendLine("Doc Comment: " + del.DocComment);
        sb.AppendLine("DTE Parent: "+del.DTE.Name);
        sb.AppendLine("Endpoint location: 
          "+del.EndPoint.AbsoluteCharOffset);
        sb.AppendLine("Infolocation: "+del.InfoLocation);
        sb.AppendLine("Can provide CodeType object? "+del.IsCodeType);
        sb.AppendLine("Is Delegate derived? 
          "+del.get_IsDerivedFrom("EnvDTE80"));
        sb.AppendLine("Is Delegate a generic? "+del.IsGeneric);
        sb.AppendLine("Kind: "+del.Kind);
        sb.AppendLine("Authoring language: "+del.Language);
        sb.AppendLine("Name: "+del.Name);
        sb.AppendLine("Parameters: "+del.Parameters.Item(1).Name);
        sb.AppendLine("Namespace: " + del.Namespace.Name);
        sb.AppendLine("Project containing the delegate: 
          "+del.ProjectItem.Name);
        sb.AppendLine("Delegate start point offset: 
          "+del.StartPoint.LineCharOffset);
        sb.AppendLine("Type: "+del.Type.TypeKind);
          MessageBox.Show(sb.ToString());
    }
    catch(System.Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}