Calling RadWindow from Server-Side

[Liji Jose]

Hi,


My requirement is to call the RadWindow - specifically RadAlert from server-side. I can achieve the same using the following code:

 Dim radalertscript As String = "<script language='javascript'>function f(){radalert('Duplicate Contract Found - Contract Selection Failed', 350, 150);};</script>"
   Me.Page.ClientScript.RegisterStartupScript(Page.GetType(), "radalert", radalertscript)

But my problem is when I invoke the above code after doing a __doPostBack() from client-side it is not working, the radAlert is not at all shown, where am i doing wrong, could you provide me with an idea?

-Liji Gilesh 

[Georgi Tunev]

Hello Liji,

Please check the following blog post - I believe that it would be of help:
http://blogs.telerik.com/supportdept/posts/09-05-05/executing_javascript_function_from_server-side_code.aspx


Greetings,
Georgi Tunev
the Telerik team

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[Princy]

Hi Liji,

Checkout the Knowledge Base which shows how to show radalert from code behind in different scenarios.
Calling radalert from codebehind

Regards,
Princy.

[Liji Jose]

Hi Georgi,

Thanks for your response.....

Again, could you tell me why the same code as mentioned in the blog is not working after an explicit __do PostBack() is done from client-side and invoked from a linkbutton click event...

I am so confused , i can't figure out the reason please help me ....

-Liji Gilesh

[Georgi Tunev]

Hi Liji,

To be able to help, I need to get a better view over your exact setup and logic. Please open a support ticket and send me a sample page where this issue could be reproduced. I will check it and get back to you right away.

Kind regards,
Georgi Tunev
the Telerik team

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[Liji Jose]

Hi Georgi,

I have opened a support ticket and uploaded my file.
Ticket ID: 304013

Please provide me a solution at the earliest.

Thanks in advance

-Liji Gilesh

[Georgi Tunev]

Hi Liji,

I have replied your support ticket. For convenience I am pasting my reply below:

---

The reason for this problem in your case is that you call a JavaScript function in the OnClientClick event handler which makes a postback to the server. You however, do not cancel the "original" postback - the one that happens when you click that button. What happens in your logic is that the JavaScript function is executed and a postback occurs (because of the __doPostback() function), but there is also a second postback that comes from the button itself.
To avoid that, you should cancel the original postback - OnClientClick ="fnOpenContractSelection(); return false;"

Another thing that I noticed is that you are trying to send a custom argument to the server (as a second parameter in the __doPostback() function) - note that in this case, you would get an event validation error because of the ASP.NET 2x / 3x security. To avoid that you should either set EnablePageValidation to false for that page, or use Page.ClientScript.RegisterForEventValidation() in Render.

Please note however that this issue is not related to the RadWindow control - you will get the same problem with any other standard controls.

---

Greetings,
Georgi Tunev
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[Liji Jose]

Hi Georgi,


Thanks for your reply and it solved my problem :)

Also thanks for the coding tip provided by you.

- Liji Gilesh