CodeDelegate2.IsDerivedFrom Property

Indicates whether or not a CodeDelegate2 object has another object as a base.

Namespace:  EnvDTE80
Assembly:  EnvDTE80 (in EnvDTE80.dll)

Syntax

'Declaration
ReadOnly Property IsDerivedFrom ( _
    FullName As String _
) As Boolean

bool this[
    string FullName
] { get; }

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

abstract IsDerivedFrom : 
        FullName:string -> bool with get

JScript does not support indexed properties.

Parameters

• FullName
  Type: String

  Required. The type to search for in the lineage of this delegate.

Property Value

Type: Boolean
A Boolean value that is true if a delegate has another delegate as a base; otherwise returns false.

Remarks

Examples

Before running this example, load a project with a class and insert the following line along with the example code. After both the line and the example code are added, click the Delegate line to place the insertion point there, and then run the example.

[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);
    }
}

.NET Framework Security

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

See Also

Reference

CodeDelegate2 Interface

EnvDTE80 Namespace

Other Resources

How to: Compile and Run the Automation Object Model Code Examples

Discovering Code by Using the Code Model (Visual Basic)

Discovering Code by Using the Code Model (Visual C#)