Crainiate Community

hello,
  I'm trying your ERM Diagram 4.x product.
I create a complex shape,
class ActionShape:ComplexShape
  {
  public String vActionType = "";
  public String vActionSecType = "";  
   
  public ActionShape(String actionType, String secType,int seq)
  {  
  vActionType = actionType;
  //Set the shape appearance

  Size = new SizeF(120, 100);
  BorderWidth = 2;

  //Add the internal applicationshape
  SolidElement action = new SolidElement();
  action.Location = new PointF(10, 10);
  action.Height = 25;  
  action.Label = new TextLabel();
  action.Label.Color = Color.Blue;
  action.Label.Text = vActionType+"-"+secType;

  Children.Add("action", action);

  //Add another subshape
  action = new SolidElement();
  action.Location = new PointF(this.Width/2-25, this.Height-30);
  action.Height = 25;
  action.Width = 50;
  action.Label = new TextLabel();  
  action.Label.Text = seq.ToString();  

  Children.Add("actionSeq", action);
  }

  }

 and then I add the complex shape to the flowchart,

when I tryed to save the flowchart with

public void SaveToXml(String filename)
  {
  this.flowchart1.Save(@"c:\test.xml", SaveFormat.Xml);  
  }

then it popup an error say that, the class ActionShape is not marked as serializable.

when I add [Serializable] at head of ActionShape
as following:
[Serializable]
  class ActionShape:ComplexShape
  {
  .......
  }

then, It can save,
but when I load it with the following code:
  public void LoadFromXml(String filename)
  {  
  this.flowchart1.Open(filename);
  }

then, it report that:
未找到反序列化“WindowsApplication2.ActionShape”类型对象的构造函数。
means:can not find the deserialization "WindowsApplication2.ActionShape" class's constructor function.

How should I do?

Best Regards
----------------
weiqiang
 

I think you need a Public Sub New() constructor on your custom class.

This is from the "Creating a custom shape" section in the programmer's guide. You need a constructor that accepts serialization info and a context. If there is no additional information, just call the base implementation.

protected Server(SerializationInfo info, StreamingContext context): base(info, context)
{
mServerType = (ServerType) Enum.Parse(typeof(ServerType), info.GetString("ServerType"),true);
mAvailable = info.GetBoolean("Available");
}
 

public override void GetObjectData(SerializationInfo info, StreamingContext context)
{
    info.AddValue("ServerType",Convert.ToInt32(ServerType).ToString());
    info.AddValue("Available",mAvailable);
    base.GetObjectData (info, context);
}