CodeElement2 介面

發行項
08/21/2008

更新：2007 年 11 月

代表原始程式檔中的程式碼項目或建構。

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

語法

<GuidAttribute("F03DCCE8-233B-43D7-A66B-A66EFC1F85C3")> _
Public Interface CodeElement2 _
    Implements CodeElement

Dim instance As CodeElement2

[GuidAttribute("F03DCCE8-233B-43D7-A66B-A66EFC1F85C3")]
public interface CodeElement2 : CodeElement

[GuidAttribute(L"F03DCCE8-233B-43D7-A66B-A66EFC1F85C3")]
public interface class CodeElement2 : CodeElement

public interface CodeElement2 extends CodeElement

備註

程式碼項目可以是程式碼的任何片段，不過通常，語言中的每一定義或宣告式語法都有一個 CodeElement2 物件。這表示對於檔案中大部分的最上層定義或宣告，或類別定義中的任何語法形式等而言，都會有對應的 CodeElement2 物件。

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

Sub IsCodeTypeExample(ByVal dte As DTE2)

    ' NOTE: This example requires a reference to the System.Text 
    '       namespace.

    ' Before running this example, open a code document from a project.
    Dim item As ProjectItem = dte.ActiveDocument.ProjectItem
    Dim sb As New StringBuilder

    RecurseElements(item.FileCodeModel.CodeElements, 0, sb)

    MsgBox(item.Name & " contains the following elements:" & vbCrLf & _
        vbCrLf & sb.ToString())

End Sub

Sub RecurseElements(ByVal elems As CodeElements, _
    ByVal level As Integer, ByVal sb As StringBuilder)

    Dim elem As CodeElement
    For Each elem In elems
        ' Add element to the list of names.
        sb.Append(" "c, level * 8)
        sb.Append(elem.Name & " [" & elem.Kind.ToString() & "]" & _
            vbCrLf)

        ' Call this function recursively if element has children.
        If elem.Kind = vsCMElement.vsCMElementNamespace Then
            RecurseElements(CType(elem, CodeNamespace).Members, _
                level + 1, sb)
        ElseIf elem.IsCodeType Then
            RecurseElements(CType(elem, CodeType).Members, _
                level + 1, sb)
        End If
    Next
End Sub

public void IsCodeTypeExample(DTE2 dte)
{
    // NOTE: This example requires a reference to the System.Text 
    //       namespace.

    // Before running this example, open a code document from a 
    // project.
    ProjectItem item = dte.ActiveDocument.ProjectItem;
    StringBuilder sb = new StringBuilder();

    RecurseElements(item.FileCodeModel.CodeElements, 0, sb);

    MessageBox.Show(item.Name + " contains the following elements:" + 
        Environment.NewLine + Environment.NewLine + sb.ToString());
}

void RecurseElements(CodeElements elems, int level, StringBuilder sb)
{
    foreach (CodeElement elem in elems)
    {
        // Add element to the list of names.
        sb.Append(' ', level * 8);
        sb.Append(elem.Name + " [" + elem.Kind.ToString() + "]" + 
            Environment.NewLine);

        // Call this function recursively if element has children.
        if (elem.Kind == vsCMElement.vsCMElementNamespace)
            RecurseElements(((CodeNamespace)elem).Members, 
                level + 1, sb);
        else if (elem.IsCodeType)
            RecurseElements(((CodeType)elem).Members, level + 1, sb);
    }
}