CodeFunction2.MustImplement 属性

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定义

命名空间:

EnvDTE80

程序集:

EnvDTE80.dll

程序集:

获取或设置一个值，该值指示是否声明此项为抽象并需要实现。

public:
 property bool MustImplement { bool get(); void set(bool value); };

public:
 property bool MustImplement { bool get(); void set(bool value); };

[System.Runtime.InteropServices.DispId(41)]
public bool MustImplement { [System.Runtime.InteropServices.DispId(41)] get; [System.Runtime.InteropServices.DispId(41)] set; }

[<System.Runtime.InteropServices.DispId(41)>]
[<get: System.Runtime.InteropServices.DispId(41)>]
[<set: System.Runtime.InteropServices.DispId(41)>]
member this.MustImplement : bool with get, set

Public Property MustImplement As Boolean

属性值

Boolean

如果声明此方法为抽象并需要实现，则布尔值为 true；否则为 false。

实现

MustImplement

属性

DispIdAttribute

示例

Sub MustImplementExample(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 mustImpl As String  
        Dim elem As CodeElement  
        For Each elem In cls.Members  
            If (elem.Kind = vsCMElement.vsCMElementFunction) Then  
                Dim fun As CodeFunction = CType(elem, CodeFunction)  
                If fun.MustImplement Then  
                    mustImpl &= fun.Prototype( _  
                        vsCMPrototype.vsCMPrototypeParamNames Or _  
                        vsCMPrototype.vsCMPrototypeParamTypes Or _  
                        vsCMPrototype.vsCMPrototypeType) & vbCrLf  
                End If  
            End If  
        Next  

        MsgBox(cls.Name & " has the following abstract methods:" & _  
            vbCrLf & vbCrLf & mustImpl)  
    Catch ex As Exception  
        MsgBox(ex.Message)  
    End Try  

End Sub  

public void MustImplementExample(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);  
        string mustImpl = "";  

        foreach (CodeElement elem in cls.Members)  
        {  
            if (elem.Kind == vsCMElement.vsCMElementFunction)  
            {  
                CodeFunction fun = (CodeFunction)elem;  

                if (fun.MustImplement)  
                    mustImpl += fun.get_Prototype(  
                        (int)(vsCMPrototype.vsCMPrototypeParamNames |   
                        vsCMPrototype.vsCMPrototypeParamTypes |   
                        vsCMPrototype.vsCMPrototypeType)) + "\n";  
            }  
        }  

        MessageBox.Show(cls.Name +   
            " has the following abstract methods:\n\n" + mustImpl);  
    }  
    catch (Exception ex)  
    {  
        MessageBox.Show(ex.Message);  
    }  
}  

注解

MustImplement 返回或设置方法是在子类中实现还是需要实现。 请注意，对于某些语言，这可能始终是 false ，并且该设置 MustImplement 可能会失败，具体取决于语言。

备注

在进行了某些类型的编辑之后，代码模型元素（例如类、结构、函数、特性、委托等）的值可能变为非确定性的，这意味着不能确定它们的值始终保持不变。