AJAX :: ScriptManager Will Not Perform Asynchronous Postbacks?
Jul 14, 2010
I am trying to integrate ASP .Net AJAX into an existing application, but so far I am striking out.After significant digging, I found that for some reason, the ScriptManager was set so that SupportsPartialRendering is false, overriding EnablePartialRendering. From looking at the MSDN documentation, it seems to me that this should not be the case.The rules for determiningrSupportsPartialRendering are (from MSDN):The W3CDomVersion property value must be greater than or equal to 1.0.The EcmaScriptVersion property value must be greater than or equal to 1.0.The SupportsCallback property value must be set totrue.Using Firefox 3.6 and IE7+, these tests should have passed. W3CDomVersion = 1.0, EcmaScriptVersion=1.4, and SupportsCallback=true.n an effort to see if I could get around it by setting the value myself, I overrode the OnInit function in the code behind to explicitly set SupportsPartialRendering to true.his appeared to attempt to start an async postback, but failed with the javascript error "this._postBackSettings.async' is null or not an object" from within the ASP.Net AJAX scripts.
Also, I created a sample application outside of my existing project and got it working exactly as I wanted. When I copied and pasted all the code from the sample project and put it into the existing solution (aspx and code behind) it experienced the same issue. I know that it has something to do with the existing solution, but I am at the end of my rope as to what it could be.Other relevant information:he solution I am trying to integrate this into was at one time upgraded from ASP .Net 2.0 to 3.5.The controls which trigger the async postback are in a repeater and are being registered with ScriptManager.RegisterAsyncPostBackControl during prerender by looping over the bound items in the repeater. This occurs after the Repeater is databound. At the same time, triggers are dynamically added to the UpdatePanel. Code snippet (taken from OnPreRender):
[Code]....
I think the "_postBackSettings.async is null" error is something of a red-herring and is an indication that I am headed down a wormhole, so I am not considering heading down the path of forcing SupportsPartialRendering to true for now. Does anyone know what else could be turning it off in the first place? Or what else could be preventing partial rendering from functioning as expected?
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[Code]....
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Source File: https://localtest.dk/layouts/site.aspx?_tsm_hiddenfield_=sitesscriptmanager_hiddenfield&_tsm_combinedscripts_=%3b%3bajaxcontroltoolkit%2c+version%3d3.5.40412.0%2c+culture%3dneutral%2c+publickeytoken%3d28f01b0e84b6d53e%3aen-us%3a1547e793-5b7e-48fe-8490-03a375b13a33%3a475a4ef5%3aeffe2a26%3a1d3ed089%3a5546a2b%3a497ef277%3aa43b07eb%3a751cdd15%3adfad98a5%3a3cf12cf1%3ad2e10b12%3af3d989c9
Line: 48
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Can anybody explain why cant you have more than one scriptmanager control in a page. Why gets emitted in the markup which creates a problem with two scriptmanager control on the page.
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