I have a master template with a script manager and update panel (AjAX extensions, .Net 2.0).

I have created a web form to do Product Info updating using the master template. Within the page, it has a few text boxes with validation controls such as Required and Custom Validator. Before a post-back, whenever there is an error, the validators will trigger and display the intended message accordingly. I have attched a sample of it. 

After a successful post-back with the record being updated, the validators are still working but it won't display the error message anymore in the validation summary. I am not sure if it is due to the Local Resource Key or what. Pls enlighten me. Thks.

Controls that Are Not Compatible with UpdatePanel Controls

The following ASP.NET controls are not compatible with partial-page updates, and are therefore not supported inside an UpdatePanel control:

• TreeView and Menu controls.

• Web Parts controls. For more information, see ASP.NET Web Parts Controls.

• FileUpload controls when they are used to upload files as part of an asynchronous postback.

• GridView and DetailsView controls when their EnableSortingAndPagingCallbacks property is set to true. The default is false.

• Login, PasswordRecovery, ChangePassword, and CreateUserWizard controls whose contents have not been converted to editable templates.

• The Substitution control.

• Validation controls, which includes the BaseCompareValidator, BaseValidator, CompareValidator, CustomValidator, RangeValidator, RegularExpressionValidator, RequiredFieldValidator, and ValidationSummary control

 See this link for more info

http://weblogs.asp.net/scottgu/archive/2007/01/25/links-to-asp-net-ajax-1-0-resources-and-answers-to-some-common-questions.aspx

Here is compatible Validation Controls

http://blogs.msdn.com/mattgi/archive/2007/01/23/asp-net-ajax-validators.aspx

DragonBall Z  ... I'm Goku ... =)

first off, I recently encountered something similar. My textboxes and <asp:RequiredFiledValidator were inside the UpdatePanel ... at every postback, these errorMessages disappear. What I did was, I move them outside the UpdatePanel, I only leave the textboxes inside and it works ... try that ...

Good Luck .....

Indeed, it has resolved the issue. Thks.

If issue is resolved then try to set "Mark asAnswer" so it will help for others...

Hi,

   Is there any fix for FileUpload control like Validation controls?

Ryan 

Check this link

http://www.codeproject.com/useritems/simpleajaxupload.asp

Hi,
1)I am having same issuse.ie., I have a Textbox,Button,RequireFieldValidation inside an update panel.
  First time it is working properly and my error message is shown.
2)After page load ,RequireFieldValidation is working but i am not able to see my error message.
3)When i remove my update panel it is working fine.So i though ,this issuse is with update panel.
4)As you post in this link, i downloaded all that validation controls and place its dll in my Bin folder.
  and also i added tagmapping in my web.config file and added that control to my web page.

5)My code is below :-

Sample.Web.UI.Compatibility.RequiredFieldValidator Rqfdv = new Sample.Web.UI.Compatibility.RequiredFieldValidator();

Rqfdv.ID = "rfv" ;

Rqfdv.ControlToValidate = "$txtInput";

Rqfdv.ToolTip = "txtInput Cannot be blank.";

Rqfdv.ErrorMessage = "*";

Rqfdv.ValidationGroup = "FooterGroup";

cell.Controls.Add(Rqfdv);

6)But now same thing happening ie., after Postback it is firing but not showing error message.
7)Can you please help me.