CodeClass2.DerivedTypes Property

Definition

Namespace:

EnvDTE80

Assembly:

Microsoft.VisualStudio.Interop.dll

Package:

Microsoft.VisualStudio.Interop v17.12.40391

Gets a collection of objects derived from the code class. Not implemented in Visual C#.

public:
 property EnvDTE::CodeElements ^ DerivedTypes { EnvDTE::CodeElements ^ get(); };

[System.Runtime.InteropServices.DispId(44)]
public EnvDTE.CodeElements DerivedTypes { [System.Runtime.InteropServices.DispId(44)] [System.Runtime.InteropServices.TypeLibFunc(1024)] get; }

[<System.Runtime.InteropServices.DispId(44)>]
[<get: System.Runtime.InteropServices.DispId(44)>]
[<get: System.Runtime.InteropServices.TypeLibFunc(1024)>]
member this.DerivedTypes : EnvDTE.CodeElements

Public ReadOnly Property DerivedTypes As CodeElements

Property Value

CodeElements

A CodeElements collection.

Implements

DerivedTypes

Attributes

DispIdAttribute TypeLibFuncAttribute

Examples

[Visual Basic]

Sub DerivedTypesExample(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 cls As CodeClass = _  
            CType(sel.ActivePoint.CodeElement( _  
            vsCMElement.vsCMElementClass), CodeClass)  

        ' Find the namespace's children.  
        Dim types As String  
        Dim elem As CodeElement  
        For Each elem In cls.DerivedTypes  
            types &= elem.Name & vbCrLf  
        Next  

        MsgBox(cls.Name & " has the following derived types:" & _  
            vbCrLf & vbCrLf & types)  
    Catch ex As Exception  
        MsgBox(ex.Message)  
    End Try  
End Sub  

[C#]

public void DerivedTypesExample(DTE2 dte)  
{  
    // 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.  
        TextSelection sel =   
            (TextSelection)dte.ActiveDocument.Selection;  
        CodeClass cls =   
           (CodeClass)sel.ActivePoint.get_CodeElement(  
           vsCMElement.vsCMElementClass);  

        // Find the namespace's children.  
        string types = "";  

        foreach (CodeElement elem in cls.DerivedTypes)  
            types += elem.Name + "\r\n";  

        MessageBox.Show(cls.Name +   
            " has the following derived types:\r\n\r\n" + types);  
    }  
    catch (Exception ex)  
    {  
        MessageBox.Show(ex.Message);  
    }  
}  

Remarks

The DerivedTypes property returns a CodeElements collection of the types that derive from the code class. The DerivedTypes collection only returns types that derive from code classes within a single project, not across other projects or languages. If the code element is a vsCMElementInterface, then the returned collection also includes CodeClass objects that implement the interface.

Note

The values of code model elements such as classes, structs, functions, attributes, delegates, and so forth can be non-deterministic after making certain kinds of edits, meaning that their values cannot be relied upon to always remain the same. For more information, see the section Code Model Element Values Can Change in Discovering Code by Using the Code Model (Visual Basic).