PageMethods In ASP.NET AJAX
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by Suresh Kumar Goudampally
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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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User Comments

Title: zhe   
Name: li
Date: 2012-12-18 8:10:18 PM
Comment:
test how
Title: akakakak   
Name: pusing
Date: 2012-12-05 11:40:34 PM
Comment:
buseeeeeeeeeeeee
Title: wqeqw   
Name: dasdas
Date: 2012-12-05 2:59:03 AM
Comment:
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Title: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaassssssssssssssssssssssssssssssssssddddddddddddddddddddddddddddddddddddddddddxxxxxxxxxxxxxxxxxxxxxxx   
Name: wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwdddddddddddddddddddddddddddddddaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Date: 2012-11-28 4:18:36 AM
Comment:
asdddddddddddddddddddddddddcas testing#1
Title: thx   
Name: thx
Date: 2012-11-28 4:16:33 AM
Comment:
thx
Title: aaa   
Name: sss
Date: 2012-11-19 7:25:12 AM
Comment:
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Title: سيش   
Name: سشي
Date: 2012-10-23 8:31:23 AM
Comment:
سيش
Title: Mr.   
Name: Farooque
Date: 2012-10-19 10:05:08 AM
Comment:
sfsdf
Title: u   
Name: hgj
Date: 2012-10-17 7:36:06 AM
Comment:
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Title: ddd   
Name: dd
Date: 2012-10-16 6:29:48 AM
Comment:
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Title: hefrhfb   
Name: dfnejdfklndg
Date: 2012-09-04 2:59:42 AM
Comment:
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Title: zz   
Name: zz
Date: 2012-08-30 9:53:06 AM
Comment:
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Title: tttyu   
Name: fdfdghf
Date: 2012-08-11 8:41:57 AM
Comment:
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Title: dgfdsg   
Name: dsgdsg
Date: 2012-07-26 2:00:31 AM
Comment:
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Title: rty   
Name: rty
Date: 2012-07-19 7:36:48 PM
Comment:
rty
Title: wwt   
Name: kevin
Date: 2012-06-09 12:21:15 AM
Comment:
dfaklj
Title: ds   
Name: ds
Date: 2012-06-06 3:15:53 PM
Comment:
sds
Title: bmbnnnnmbnm   
Name: nbmbnm
Date: 2012-05-18 6:07:18 AM
Comment:
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Title: Excellent   
Name: Srinivasa Rao D
Date: 2011-12-23 1:05:20 AM
Comment:
U save my day..!
Title: Invalid Method Name   
Name: Prakash
Date: 2011-07-08 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: 2011-02-01 7:43:14 AM
Comment:
Understandable for those who are beginner for PageMethods....
Title: Nice Article   
Name: HPR
Date: 2011-01-24 8:41:55 PM
Comment:
Nice informative article.
Title: aa   
Name: aaa
Date: 2011-01-18 5:34:27 AM
Comment:
very nice
Title: why does not work in firefox and safai while javascript is enable?   
Name: AKM
Date: 2010-11-26 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: 2010-11-22 5:37:58 AM
Comment:
Too good....
Title: A question..   
Name: Dario
Date: 2010-11-14 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: 2010-08-10 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: 2010-04-29 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: 2010-04-28 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: 2010-03-26 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: 2010-03-25 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: 2010-03-22 3:19:51 AM
Comment:
Very good article.
Title: GetStatus   
Name: Suresh Kumar
Date: 2010-03-10 4:07:24 AM
Comment:
i am referring to sample method GetStatus in the article.
Title: Interesting, but a bit confusing   
Name: Woho
Date: 2010-03-10 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: 2010-03-09 2:04:48 PM
Comment:
Nice article.






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