業務流程圖控件FlowChart.NET是一個通用的流程圖控件，提供了用于創建或編輯圖表的直觀的用戶交互模型。在上一篇文章創建自定義節點類型（一）和（二）中已經講解了一些創建自定義節點類型的步驟，本教程將繼續展示在FlowChart.NET如何創建自定義節點類型的步驟。

6、定義自定義屬性

    定義自定義屬性，比如IconNode定義屬性實現圖標和圖像的標簽。

C#

public Image Icon
{
    get { return icon; }
    set
    {
        icon = value;
        Bounds = new RectangleF(Bounds.Location, CalculateSize());
    }
}

public string Label
{
    get { return label; }
    set
    {
        label = value;
        Bounds = new RectangleF(Bounds.Location, CalculateSize());
    }
}

Visual Basic

Public Property Icon() As Image

    Get
        Return fIcon
    End Get

    Set(ByVal Value As Image)

        fIcon = Value
        Bounds = New RectangleF(Bounds.Location, CalculateSize())

    End Set

End Property

Public Property Label() As String

    Get
        Return fLabel
    End Get

    Set(ByVal Value As String)

        fLabel = Value
        Bounds = New RectangleF(Bounds.Location, CalculateSize())

    End Set

End Property

7、啟用系列化

    為了使得自定義項目類型可以序列化，調用RegisterItemClass方法。比如要使得IconNode對象的序列化，就需要添加下面的來自構造函數的代碼。

C#

// Enable serialization of IconNode instances
Diagram.RegisterItemClass(typeof(IconNode), "IconNode", 1);

Visual Basic

' Enable serialization of IconNode instances
Diagram.RegisterItemClass(GetType(IconNode), "IconNode", 1)