PageMethods In ASP.NET AJAX: ASP Alliance

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PageMethods In ASP.NET AJAX

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by Suresh Kumar Goudampally
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Article Contents:

Conclusion

Advantages

· This approach is easier and the code is shorter and reliable.

· It provides greater compatibility since it is easy to change fast.

· Less work for developer to write client script and a server method.

· Page parameters become strongly typed and automatically validated.

· You don't have to parse and convert parameters by yourself. In ASP.NET, parameters passed on URLs are available through Request.QueryString, only as strings.

· No need to look at a target page's code to know how to call it. No need for separate documentation about ways to call a page.

· Page parameters are automatically validated and become strongly typed.

· As we don’t to post entire viewstate of the page using Page Methods we achieve the bandwidth benefits.

Key Points to Remember

· The Page Method should be static using the attribute [WebMethod].

· The Page Method can be in the code behind file of the page and in aspx file as well.

· The EnablePageMethods property of the script manger should be marked as “True”.

· The call back methods are mandatory to receive the processed result on the client side.

· Page Methods don’t support all the datatypes to return to client.

· We can access the Session. Application and Cache variables using Page Methods.

References

http://randomactsofcoding.blogspot.com/2007/10/introduction-to-pagemethods.html

http://metasapiens.com/PageMethods/features.aspx

http://blogs.msdn.com/sburke/archive/2006/10/21/hint-components-that-use-web-services-with-asp-net-ajax-v1-0-beta.aspx

http://www.singingeels.com/Articles/Using_Page_Methods_in_ASPNET_AJAX.aspx

http://blogs.msdn.com/mattgi/archive/2006/11/15/accessing-session-data-from-javascript.aspx

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Title: bmbnnnnmbnm
Name: nbmbnm
Date: 5/18/2012 6:07:18 AM
Comment:
nnnnnmbbbbbbbbbmmmmmmmmmmmmmmbbmbbbbbbbbbbbbbbmmmmmm

Title: Excellent
Name: Srinivasa Rao D
Date: 12/23/2011 1:05:20 AM
Comment:
U save my day..!

Title: Invalid Method Name
Name: Prakash
Date: 7/8/2011 4:53:41 AM
Comment:
Please change method name as GetPageMethod instead of GetStatus(). Those who are copying this code, that code wont run. check befor every one run. Thanks.

Title: Good One
Name: sachin
Date: 2/1/2011 7:43:14 AM
Comment:
Understandable for those who are beginner for PageMethods....

Title: Nice Article
Name: HPR
Date: 1/24/2011 8:41:55 PM
Comment:
Nice informative article.

Title: aa
Name: aaa
Date: 1/18/2011 5:34:27 AM
Comment:
very nice

Title: why does not work in firefox and safai while javascript is enable?
Name: AKM
Date: 11/26/2010 7:02:35 AM
Comment:
Work in IE but,why does not work in firefox and safari while javascript is enable on both browser?

Title: Feedback
Name: Atul Tiwari
Date: 11/22/2010 5:37:58 AM
Comment:
Too good....

Title: A question..
Name: Dario
Date: 11/14/2010 9:16:49 AM
Comment:
Is it possible for the page method to return a structure instead a simple string?
And how to read it on client side?
Thank you!

Title: Not clear yet
Name: M
Date: 8/10/2010 6:27:42 AM
Comment:
The article could be better structured. It's all a bit chaotic and confusing...

Title: clear now
Name: Babak Sekandari
Date: 4/29/2010 9:58:30 AM
Comment:
OK, I understand now.
public static string GetStatus(string s1, string s2){ . . . appears later.
It's better to view the whole article at once.
Very good explanations by the way. Thank you very much.

Title: confused
Name: Babak Sekandari
Date: 4/28/2010 6:59:47 PM
Comment:
The page method call is: PageMethods.GetStatus(onSucceed, onError);
But the code behind sample is public static string GetPageMethod()

As Woho stated, I don't understand why one is GetPageMethod() and the other is GetStatus()

Title: setting control value
Name: suresh kumar
Date: 3/26/2010 12:08:31 AM
Comment:
that would be a logical error, have you tried to debug onsucceed method and check the value before it is assigned to textbox. Can you send me the code?

Title: setting control value
Name: Maulik
Date: 3/25/2010 9:14:31 PM
Comment:
Hi,

OnSucceed event, I want to set the result value to a textbox. For that, I find the textbox and assign result to textbox's "value" property. I receive the expected value for result but textbox has an empty value..any reason?? I use onblur event of another textbox and do the same thing and at that time textbox shows result value..any idea??

Title: Good
Name: NNN
Date: 3/22/2010 3:19:51 AM
Comment:
Very good article.

Title: GetStatus
Name: Suresh Kumar
Date: 3/10/2010 4:07:24 AM
Comment:
i am referring to sample method GetStatus in the article.

Title: Interesting, but a bit confusing
Name: Woho
Date: 3/10/2010 2:33:07 AM
Comment:
You keep referring to the method GetStatus, but I guess you really mean GetPageMethod? Otherwise it doesn't make any sense...
Interesting article although, but feels a bit like "ugly coding" (the concept, not your code :) ).

Title: Good one
Name: Bijith K B
Date: 3/9/2010 2:04:48 PM
Comment:
Nice article.