Gets or sets the user-defined data of this AnnObject.

Syntax

Visual Basic (Declaration)
Public Overridable Property UserData As Object

Visual Basic (Usage)	Copy Code
`Dim instance As AnnObject Dim value As Object instance.UserData = value value = instance.UserData`

C#
public virtual object UserData {get; set;}

Managed Extensions for C++
public: __property virtual Object* get_UserData(); public: __property virtual void set_UserData( Object* value );

C++/CLI
public: virtual property Object^ UserData { Object^ get(); void set (Object^ value); }

Return Value

The user-defined data of this AnnObject.

Example

This example will use a user-defined class to store extra information with each annotation object.

Visual Basic Copy Code

Visual Basic	Copy Code
' This is the main method in your application to create a container Private Function AnnObject_UserData() As AnnContainer ' create the container and subclass to its Objects.ItemAdded event Dim container As AnnContainer = New AnnContainer() AddHandler container.Objects.ItemAdded, AddressOf Objects_ItemAdded ' Add an item to the container Dim ellipse As AnnEllipseObject = New AnnEllipseObject() ellipse.Bounds = New AnnRectangle(100, 100, 100, 100, AnnUnit.Pixel) ellipse.Pen = New AnnPen(Color.Green, New AnnLength(2, AnnUnit.Pixel)) ellipse.Brush = New AnnSolidBrush(Color.Yellow) ellipse.Name = "Ellipse" container.Objects.Add(ellipse) Return container End Function ' A private class in your application to store the user name as well as the date/time an annotation object was created. Public Class MyUserData Public Sub New(ByVal userName_Renamed As String) _userName = userName_Renamed _dateCreated = DateTime.Now End Sub Private _userName As String Public Property UserName() As String Get Return _userName End Get Set(ByVal value As String) _userName = Value End Set End Property Private _dateCreated As DateTime Public Property DateCreated() As DateTime Get Return _dateCreated End Get Set(ByVal value As DateTime) _dateCreated = Value End Set End Property End Class Private Sub Objects_ItemAdded(ByVal sender As Object, ByVal e As RasterCollectionEventArgs(Of AnnObject)) ' get the object Dim obj As AnnObject = CType(IIf(TypeOf e.Item Is AnnObject, e.Item, Nothing), AnnObject) ' store the current user name and date/time this object was created in the object Dim userData As MyUserData = New MyUserData("MyUserName") obj.UserData = userData End Sub

' This is the main method in your application to create a container

Private Function AnnObject_UserData() As AnnContainer

   ' create the container and subclass to its Objects.ItemAdded event

   Dim container As AnnContainer = New AnnContainer()

   AddHandler container.Objects.ItemAdded, AddressOf Objects_ItemAdded



   ' Add an item to the container

   Dim ellipse As AnnEllipseObject = New AnnEllipseObject()

   ellipse.Bounds = New AnnRectangle(100, 100, 100, 100, AnnUnit.Pixel)

   ellipse.Pen = New AnnPen(Color.Green, New AnnLength(2, AnnUnit.Pixel))

   ellipse.Brush = New AnnSolidBrush(Color.Yellow)

   ellipse.Name = "Ellipse"

   container.Objects.Add(ellipse)





   Return container

End Function



' A private class in your application to store the user name as well as the date/time an annotation object was created.

Public Class MyUserData

   Public Sub New(ByVal userName_Renamed As String)

      _userName = userName_Renamed

      _dateCreated = DateTime.Now

   End Sub



   Private _userName As String

   Public Property UserName() As String

      Get

         Return _userName

      End Get

      Set(ByVal value As String)

         _userName = Value

      End Set

   End Property



   Private _dateCreated As DateTime

   Public Property DateCreated() As DateTime

      Get

         Return _dateCreated

      End Get

      Set(ByVal value As DateTime)

         _dateCreated = Value

      End Set

   End Property

End Class



Private Sub Objects_ItemAdded(ByVal sender As Object, ByVal e As RasterCollectionEventArgs(Of AnnObject))

   ' get the object

   Dim obj As AnnObject = CType(IIf(TypeOf e.Item Is AnnObject, e.Item, Nothing), AnnObject)



   ' store the current user name and date/time this object was created in the object

   Dim userData As MyUserData = New MyUserData("MyUserName")

   obj.UserData = userData

End Sub

C# Copy Code

C#	Copy Code
// This is the main method in your application to create a container private AnnContainer AnnObject_UserData() { // create the container and subclass to its Objects.ItemAdded event AnnContainer container = new AnnContainer(); container.Objects.ItemAdded += new EventHandler<RasterCollectionEventArgs<AnnObject>>(Objects_ItemAdded); // Add an item to the container AnnEllipseObject ellipse = new AnnEllipseObject(); ellipse.Bounds = new AnnRectangle(100, 100, 100, 100, AnnUnit.Pixel); ellipse.Pen = new AnnPen(Color.Green, new AnnLength(2, AnnUnit.Pixel)); ellipse.Brush = new AnnSolidBrush(Color.Yellow); ellipse.Name = "Ellipse"; container.Objects.Add(ellipse); return container; } // A private class in your application to store the user name as well as the date/time an annotation object was created. public class MyUserData { public MyUserData(string userName) { _userName = userName; _dateCreated = DateTime.Now; } private string _userName; public string UserName { get { return _userName; } set { _userName = value; } } private DateTime _dateCreated; public DateTime DateCreated { get { return _dateCreated; } set { _dateCreated = value; } } } void Objects_ItemAdded(object sender, RasterCollectionEventArgs<AnnObject> e) { // get the object AnnObject obj = e.Item as AnnObject; // store the current user name and date/time this object was created in the object MyUserData userData = new MyUserData("MyUserName"); obj.UserData = userData; }

// This is the main method in your application to create a container 
private AnnContainer AnnObject_UserData() 
{ 
   // create the container and subclass to its Objects.ItemAdded event 
   AnnContainer container = new AnnContainer(); 
   container.Objects.ItemAdded += new EventHandler<RasterCollectionEventArgs<AnnObject>>(Objects_ItemAdded); 
 
   // Add an item to the container 
   AnnEllipseObject ellipse = new AnnEllipseObject(); 
   ellipse.Bounds = new AnnRectangle(100, 100, 100, 100, AnnUnit.Pixel); 
   ellipse.Pen = new AnnPen(Color.Green, new AnnLength(2, AnnUnit.Pixel)); 
   ellipse.Brush = new AnnSolidBrush(Color.Yellow); 
   ellipse.Name = "Ellipse"; 
   container.Objects.Add(ellipse); 
 
 
   return container; 
} 
 
// A private class in your application to store the user name as well as the date/time an annotation object was created. 
public class MyUserData 
{ 
   public MyUserData(string userName) 
   { 
      _userName = userName; 
      _dateCreated = DateTime.Now; 
   } 
 
   private string _userName; 
   public string UserName 
   { 
      get 
      { 
         return _userName; 
      } 
      set 
      { 
         _userName = value; 
      } 
   } 
 
   private DateTime _dateCreated; 
   public DateTime DateCreated 
   { 
      get 
      { 
         return _dateCreated; 
      } 
      set 
      { 
         _dateCreated = value; 
      } 
   } 
} 
 
void Objects_ItemAdded(object sender, RasterCollectionEventArgs<AnnObject> e) 
{ 
   // get the object 
   AnnObject obj = e.Item as AnnObject; 
 
   // store the current user name and date/time this object was created in the object 
   MyUserData userData = new MyUserData("MyUserName"); 
   obj.UserData = userData; 
}

Remarks

You can use this property to store any extra data with this AnnObject. However, to allow functionality that depends on serialization (such as loading/saving from file or memory, copy/paste to/from clipboard, undo/redo buffers, etc), you must make sure the data type you use with this property is serializable. For more information on serialization, refer to the SerializableAttribute and ISerializable interface.

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

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UserData Property
See Also Example

Syntax

Return Value

Example

Remarks

Requirements

See Also

Reference