CodeClass.AddBase(Object, Object) Method

Reference

Definition

Namespace:: EnvDTE

Assembly:: EnvDTE.dll

Assembly:: Microsoft.VisualStudio.Interop.dll

Package:: Microsoft.VisualStudio.Interop v17.12.40391

Important

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Adds an item to the list of inherited objects.

EnvDTE::CodeElement AddBase(winrt::Windows::Foundation::IInspectable const & Base, winrt::Windows::Foundation::IInspectable const & Position);

[System.Runtime.InteropServices.DispId(39)]
public EnvDTE.CodeElement AddBase (object Base, object Position);

[<System.Runtime.InteropServices.DispId(39)>]
abstract member AddBase : obj * obj -> EnvDTE.CodeElement

Public Function AddBase (Base As Object, Optional Position As Object) As CodeElement

Parameters

Base: Object

Required. The class from which to derive implementation.

For CodeClass objects, this is either a CodeClass or a fully qualified type name. Visual C++ requires the colon-separated (::) format for its fully qualified type names. All other languages support the period-separated format.

Position: Object

Optional. Default = 0. The code element after which to add the new element. If the value is a CodeElement, then the new element is added immediately after it.

If the value is a Long, then AddBase(Object, Object) indicates the element after which to add the new element.

Because collections begin their count at 1, passing 0 indicates that the new element should be placed at the beginning of the collection. A value of -1 means the element should be placed at the end.

Returns

CodeElement

A CodeElement object.

Attributes: DispIdAttribute

Examples

Sub AddBaseExample(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)  
        Dim cm As CodeModel = _  
            cls.ProjectItem.ContainingProject.CodeModel  

        ' Create a fully qualified base name.  
        Dim baseName As String = ConvertFullName(cm, _  
            "System.Collections.CollectionBase")  

        ' Add a base to the class.  
        cls.AddBase(baseName)  
    Catch ex As Exception  
        MsgBox(ex.Message)  
    End Try  

End Sub  

Function ConvertFullName(ByVal cm As CodeModel, _  
    ByVal fullName As String) As String  

    ' Convert a .NET type name into a C++ type name.  
    If (cm.Language = CodeModelLanguageConstants.vsCMLanguageVC) Or _  
        (cm.Language = CodeModelLanguageConstants.vsCMLanguageMC) Then  
        Return fullName.Replace(".", "::")  
    Else  
        Return fullName  
    End If  

End Function

public void AddBaseExample(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);  
        CodeModel cm = cls.ProjectItem.ContainingProject.CodeModel;  

        // Create a fully qualified base name.  
        string baseName = ConvertFullName(cm,   
            "System.Collections.CollectionBase");  

        // Add a base to the class.  
        cls.AddBase(baseName, -1);  
    }  
    catch (Exception ex)  
    {  
        MessageBox.Show(ex.Message);  
    }  
}  

string ConvertFullName(CodeModel cm, string fullName)  
{  
    // Convert a .NET type name into a C++ type name.  
    if ((cm.Language == CodeModelLanguageConstants.vsCMLanguageVC) ||   
        (cm.Language == CodeModelLanguageConstants.vsCMLanguageMC))  
        return fullName.Replace(".", "::");  
    else  
        return fullName;  
}

Remarks

AddBase returns a CodeElement object rather than a CodeType to accommodate Visual C++, and the Kind of the returned object is vsCMElementVCBase for the implementation of Visual C++.

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).

Applies to

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