CodeDelegate2.Children Property
Gets a collection of objects contained within this CodeDelegate2.
Namespace: EnvDTE80
Assembly: EnvDTE80 (in EnvDTE80.dll)
Syntax
'Declaration
ReadOnly Property Children As CodeElements
CodeElements Children { get; }
property CodeElements^ Children {
CodeElements^ get ();
}
abstract Children : CodeElements
function get Children () : CodeElements
Property Value
Type: EnvDTE.CodeElements
A CodeElements collection.
Implements
Remarks
If the delegate has no children, then Nothing is returned.
This property is used primarily by Visual C++. Children returns every object returnable from a code element. A class, for example, returns members, bases, implemented interfaces, attributes, comments, and so forth.
To iterate through the members of a namespace or type (class, struct, interface, and so forth), you must QI (query interface) or cast the CodeElement2 to a CodeNamespace and then use the Members property.
Children returns the collection of all related CodeElement2 objects that can be referenced via this delegate. For example, for a CodeClass, this might include the metadata code elements for the class and perhaps the Visual C++ declspecs, along with contributed code based on the Attributed Programming feature in Visual C++, template parameters, and so forth. A CodeFunction2 might include all of its parameters, contributed parameters based on the Attributed Programming feature in Visual C++, and so forth.
The Children property may return Nothing depending on the object and the language. There is no requirement to support this in Visual Studio.
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).
Examples
Before running this example, load a project with a class and insert the following line along with the example code. After both the line and the example code are added, click the Delegate line to place the insertion point there, and then run the example.
[VisualBasic]
Delegate Sub MySubDelegate(ByVal x As Integer)
[C#]
public delegate void MySubDelegate(int x);
[VisualBasic]
Public Sub CodeDelegateExample(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 del As CodeDelegate2 = _
CType(sel.ActivePoint.CodeElement( _
vsCMElement.vsCMElementDelegate), CodeDelegate2)
Dim elem As CodeElement2
Dim sb As New System.Text.StringBuilder
' Display the baseclass name of the delegate.
sb.AppendLine("Delegate base class name: " & _
del.BaseClass.Name)
sb.AppendLine("Delegate's access: " & del.Access.ToString)
sb.AppendLine("Children: " & del.Children.Count & " _
Name: " & del.Children.Item(1).Name)
sb.AppendLine("Collection: " & del.Collection.Count)
sb.AppendLine("Delegates:")
For Each elem In del.Collection
sb.AppendLine(" - " & elem.Name)
Next
sb.AppendLine("Comment: " & del.Comment)
sb.AppendLine("Doc Comment: " & del.DocComment)
sb.AppendLine("DTE Parent: " & del.DTE.Name)
sb.AppendLine("Endpoint location: " & _
del.EndPoint.AbsoluteCharOffset)
sb.AppendLine("Infolocation: " & del.InfoLocation.ToString)
sb.AppendLine("Can provide CodeType object? " & _
del.IsCodeType.ToString)
sb.AppendLine("Is Delegate derived? " & _
del.IsDerivedFrom("EnvDTE80"))
sb.AppendLine("Is Delegate a generic? " & del.IsGeneric)
sb.AppendLine("Kind: " & del.Kind.ToString)
sb.AppendLine("Authoring language: " & _
del.Language.ToString)
sb.AppendLine("Name: " & del.Name)
sb.AppendLine("Namespace: " + del.Namespace.Name);
sb.AppendLine("Parameters: " & del.Parameters.Item(1).Name)
sb.AppendLine("Project containing the delegate: " & _
del.ProjectItem.Name)
sb.AppendLine("Prototype for delegate: " & del.Prototype)
sb.AppendLine("Delegate start point offset: " & _
del.StartPoint.LineCharOffset)
sb.AppendLine("Type: " & del.Type.TypeKind.ToString)
MsgBox(sb.ToString)
Catch ex As System.Exception
MsgBox(ex.ToString)
End Try
End Sub
[C#]
public void CodeDelegateExample(DTE2 DTE)
{
try
{
// Retrieve the CodeClass at the insertion point.
TextSelection sel = (TextSelection)
DTE.ActiveDocument.Selection;
CodeDelegate2 del = (CodeDelegate2)
sel.ActivePoint.get_CodeElement
(vsCMElement.vsCMElementDelegate);
System.Text.StringBuilder sb = new System.Text.StringBuilder();
// Display the baseclass name of the delegate.
sb.AppendLine("Delegate base class name: " +
del.BaseClass.Name);
sb.AppendLine("Delegate's access: " + del.Access);
sb.AppendLine("Children: "+del.Children.Count+" Name:
"+del.Children.Item(1).Name);
sb.AppendLine("Collection: "+del.Collection.Count);
sb.AppendLine("Delegates:");
foreach (CodeElement2 elem in del.Collection )
{
sb.AppendLine(" - "+elem.Name);
}
sb.AppendLine("Comment: "+del.Comment);
sb.AppendLine("Attributes:");
foreach (CodeElement2 elem in del.Attributes)
{
sb.AppendLine(" - " + elem.Name);
}
sb.AppendLine("Bases:");
foreach (CodeElement2 elem in del.Bases)
{
sb.AppendLine(" - " + elem.Name);
}
sb.AppendLine("Doc Comment: " + del.DocComment);
sb.AppendLine("DTE Parent: "+del.DTE.Name);
sb.AppendLine("Endpoint location:
"+del.EndPoint.AbsoluteCharOffset);
sb.AppendLine("Infolocation: "+del.InfoLocation);
sb.AppendLine("Can provide CodeType object? "+del.IsCodeType);
sb.AppendLine("Is Delegate derived?
"+del.get_IsDerivedFrom("EnvDTE80"));
sb.AppendLine("Is Delegate a generic? "+del.IsGeneric);
sb.AppendLine("Kind: "+del.Kind);
sb.AppendLine("Authoring language: "+del.Language);
sb.AppendLine("Name: "+del.Name);
sb.AppendLine("Parameters: "+del.Parameters.Item(1).Name);
sb.AppendLine("Namespace: " + del.Namespace.Name);
sb.AppendLine("Project containing the delegate:
"+del.ProjectItem.Name);
sb.AppendLine("Delegate start point offset:
"+del.StartPoint.LineCharOffset);
sb.AppendLine("Type: "+del.Type.TypeKind);
MessageBox.Show(sb.ToString());
}
catch(System.Exception ex)
{
MessageBox.Show(ex.Message);
}
}
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.
See Also
Reference
Other Resources
How to: Compile and Run the Automation Object Model Code Examples