CodeClass2.IsDerivedFrom[String] 属性
定义
重要
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获取一个值，该值指示代码类是否将另一个代码类作为基。
public:
property bool IsDerivedFrom[System::String ^] { bool get(System::String ^ FullName); };[System.Runtime.InteropServices.DispId(43)]
public bool IsDerivedFrom[string FullName] { [System.Runtime.InteropServices.DispId(43)] get; }[<System.Runtime.InteropServices.DispId(43)>]
[<get: System.Runtime.InteropServices.DispId(43)>]
member this.IsDerivedFrom(string) : boolPublic ReadOnly Property IsDerivedFrom(FullName As String) As Boolean参数
- FullName
- String
必需。 要在此类型的沿袭中搜索的类型。
属性值
一个布尔值， true 如果代码类将另一个代码类作为其基，则该值为; false 否则为。
实现
- 属性
示例
[Visual Basic]
Sub IsDerivedFromExample(ByVal dte As DTE2)
' Before running this example, open a code document from a project.
Try
Dim projItem As ProjectItem = dte.ActiveDocument.ProjectItem
Dim cm As CodeModel = projItem.ContainingProject.CodeModel
' Create a new class.
Dim cls1 As CodeClass = cm.AddClass("BaseClass", projItem.Name)
' Derive a class from the newly created class.
Dim bases() As Object = {cls1.FullName}
Dim cls2 As CodeClass = cm.AddClass("DerivedClass", _
projItem.Name, -1, bases)
Dim derived As String
If cls1.IsDerivedFrom(cls2.FullName) Then
derived &= cls1.Name & " is derived from " & _
cls2.Name & vbCrLf
Else
derived &= cls1.Name & " is not derived from " & _
cls2.Name & vbCrLf
End If
If cls2.IsDerivedFrom(cls1.FullName) Then
derived &= cls2.Name & " is derived from " & _
cls1.Name & vbCrLf
Else
derived &= cls2.Name & " is not derived from " & _
cls1.Name & vbCrLf
End If
MsgBox(derived)
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub
[C#]
public void IsDerivedFromExample(DTE2 dte)
{
// Before running this example, open a code document from
// a project.
try
{
ProjectItem projItem = dte.ActiveDocument.ProjectItem;
CodeModel cm = projItem.ContainingProject.CodeModel;
// Create a new class.
CodeClass cls1 = cm.AddClass("BaseClass", projItem.Name, -1,
null, null, vsCMAccess.vsCMAccessPublic);
// Derive a class from the newly created class.
object[] bases = {cls1.FullName};
CodeClass cls2 = cm.AddClass("DerivedClass", projItem.Name, -1,
bases, null, vsCMAccess.vsCMAccessPublic);
string derived = "";
if (cls1.get_IsDerivedFrom(cls2.FullName))
derived += cls1.Name + " is derived from " +
cls2.Name + "\n";
else
derived += cls1.Name + " is not derived from " +
cls2.Name + "\n";
if (cls2.get_IsDerivedFrom(cls1.FullName))
derived += cls2.Name + " is derived from " +
cls1.Name + "\n";
else
derived += cls2.Name + " is not derived from " +
cls1.Name + "\n";
MessageBox.Show(derived);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
注解
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。 有关详细信息，请参阅 "代码模型元素值在 使用代码模型查找代码时 可能发生变化" (Visual Basic) "。