Extender controls may not be registered before PreRender.

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I am using AjaxToolkitcintol in webpage design . using in master page Toolkitscriptmanager in page .creating new page using MasterPege add calenderextender value will be saving in database eroor will come given below............................ Please give me Reply sir

I am trying re-install on AjaxToolkit and change scrprtmanager all any other solution Give Me.

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Server Error in '/' Application.
Extender controls may not be registered before PreRender.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Extender controls may not be registered before PreRender.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[InvalidOperationException: Extender controls may not be registered before PreRender.]
System.Web.UI.ScriptControlManager.RegisterExtenderControl(TExtenderControl extenderControl, Control targetControl) +432737
System.Web.UI.ScriptManager.RegisterExtenderControl(TExtenderControl extenderControl, Control targetControl) +95
System.Web.UI.ExtenderControl.RegisterWithScriptManager() +176
System.Web.UI.ExtenderControl.OnPreRender(EventArgs e) +19
AjaxControlToolkit.ExtenderControlBase.OnPreRender(EventArgs e) +36
System.Web.UI.Control.PreRenderRecursiveInternal() +103
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2496

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.225

Posted 23-Jun-14 16:03pm

SUBBU237

Updated 19-Apr-16 21:10pm

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DamithSL 23-Jun-14 22:34pm

where you put Toolkitscriptmanager? can you update the question with master page aspx code?

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SUBBU237 · Accepted Answer · 2016-04-19T21:10:00

Solution 2

I am not add references of ajax-toolkit in project solution. that's why i got the problem.

Posted 19-Apr-16 21:10pm

SUBBU237