Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

How can I serialize an ASP.NET User Control?

Posted on 2006-10-27
3
2,700 Views
Last Modified: 2010-04-30
I am programmatically adding user controls from an .ascx file into my application on Page_Load, which is necessary because the controls are populated with a database query and the query may return the need for any number of controls to be added.  I want to maintain these controls in the ViewState so that on post-back I can re-add the objects while maintaining the updated values from any changes a user might have made (selecting an item from a drop-down, for example).  When I try to add these controls to the ViewState, however, I get the following exception, which basically tells me that the Serializable attribute is not applied to my control's class:
System.Runtime.Serialization.SerializationException: Type 'ASP.MyClass' in Assembly 'App_Web_pf3y4e1h, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' is not marked as serializable.

If this were a standard vb class, then I would simply apply the <Serializable()> attribute just before the class declaration, but here the class declaration is implicit in the first line of the file:  
<%@ Control Language="VB" ClassName="MyClass" %>

I have accomplished my ultimate goal here before by manually creating a hashtable object with each of the properties of the control, and then manually re-adding the controls on post-back.  This, however, seems inefficient, since I already have an object to house this data.  How can I apply the Serializable attribute to my control?
0
Comment
Question by:BofADev
3 Comments
 
LVL 10

Accepted Solution

by:
jnhorst earned 125 total points
ID: 17822484
Have you tried putting the <Serializable()> attribute in front of the class delcaration for the UserControl(s) (in their codebehind)?

John
0
 

Author Comment

by:BofADev
ID: 17906085
thanks for helping me think outside the box.  i typically try to avoid code-behinds, as they only make more files and more complexity.  however, this is a case when they're necessary, i suppose.
0
 

Expert Comment

by:cyclides
ID: 22531870
Try to use <Serializable()> for the class and for the properties:
<System.ComponentModel.DesignerSerializationVisibility(System.ComponentModel.DesignerSerializationVisibility.Content)>

Omar
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Lots of people ask this question on how to extend the “MembershipProvider” to make use of custom authentication like using existing database or make use of some other way of authentication. Many blogs show you how to extend the membership provider c…
IntroductionWhile developing web applications, a single page might contain many regions and each region might contain many number of controls with the capability to perform  postback. Many times you might need to perform some action on an ASP.NET po…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question