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Is it possible to use Multiple Script Manager in the Web page?

Posted By :Narayanan     Posted Date :October 23, 2011    Points :40   Category :ASP.Net 
No , I think, It is not possible to use it .But Single Script manager is enough.

You can also find related Interview Question to Is it possible to use Multiple Script Manager in the Web page?  below: 

Can we add multiple script managers on a single page?

No it will throw error, a page can contain only one ScriptManager control in its hierarchy. To register services and scripts for nested pages, user controls, or components when the parent page already has a ScriptManager control, use the ScriptManagerProxy control.

The purpose of ScriptManager is just to enables AJAX In Your Web Application. so adding multiple ScriptManager doesn't make any sense. (More...)

Which property needs to be set for script manager control to extend the time before throwing time out expection if no response is received from the server?

AsyncPostBackTimeout Property needs to set which gets or sets a value that indicates the time, in seconds, before asynchronous postback time out if no response is received from the server.

The default value of this property is 90 second. We can also set the user defined error message using asyncpostbackerrormessage property (as shown in above code) for time out. (More...)

How can you cache Multiple Versions of a Page?

Using output cache you can cache multiple versions of the page.

We can either use,.

- @ OutputCache directive at design time declaratively for Declarative Approach

- Response.Cacheclass at runtime for Programmatic Approach .

With @ OutputCache directive four parameters of VaryByParam , VaryByControl, VaryByHeader, VaryByCustom allows user to cache page depending on query string, control value, request's HTTP header, request's HTTP header respectively.

For an example:

To turn off caching,

Declarative Approach:
<%@ OutputCache Location="None" VaryByParam="None" %>

Programmatic Approach:

To cache the output for each HTTP request that arrives with a different ID:

Declarative Approach:
<%@ OutputCache duration="60" varybyparam=" ID" %>

Programmatic Approach:
Response.Cache.VaryByParams["ID"] = true; (More...)

Is Multiple Pages possible In Single asp.net Page?

We can achieve this in simple way by using FrameSet .... (More...)

Can we use multiple ScriptManager on a page?

No. You can use only one ScriptManager on a page.

What is update panel and script manager in .NET

Update panel is used when you are working with some of the asp.net controls like dropdown box, buttons and you don't want the whole page to get refreshed after each event then put that section of controls inside the update panel. And script manager is used to support the update panel. You can define script manager directly from the .net tool box-

And update panel you can use like this-


Can we have multiple document.ready() function on the same page?

YES. We can have any number of document.ready() function on the same page. (More...)

Can code inside multiple catch block be executed?

No, Code can not execute in mutiple catch block (More...)

Does C# support multiple inheritance?


C# does not support multiple inheritance. A class can inherit from maximum one base class, although it can implement any number of interfaces. Like Java, C# does not support multiple inheritance, meaning that classes cannot inherit from more than one class (More...)

Explain the life cycle of an ASP .NET page.

Life cycle of ASP.Net Web Form
Page Request >> Start >> Page Init >> Page Load >> Validation >>
PostBack Event Handling >> Page Rendering >> Page Unload
Page Request - When the page is requested ASP.Net determines
whether the page is to be parsed and compiled or a cached verion
of the page is to be sent without running the page.
Start - Page propertied REQUEST and RESPONSE are SET, if the
page is pastback request then the IsPostBack property is SET and
in addition to this UICulture property is also SET.
Page Initilization - In this the UniqueID of each property is SET.
If the request was postback the data is not yet loaded from the
Page Load - If it was a postback request then the data gets loaded
in the control from the ViewState and control property are set.
Validation - If any control validation present, they are performed
and IsValid property is SET for each control.
PostBack Event Handling - If it was a postback request then any
event handlers are called.
Page Rendering - Before this the viewstate is saved from the page
and RENDER method of each page is called.
Page Unload - Page is fully rendered and sent to the client(Browser)
and is discarded. Page property RESPONSE and REQUEST are unloaded. (More...)

Can we have multiple threads in one App domain ?

One or more threads run in an AppDomain. An AppDomain is a runtime representation of a logical process within a physical process. Each AppDomain is started with a single thread, but can create additional threads from any of its threads.
Note :- All threading classes are defined in System.Threading namespace. (More...)

cross page posting in ASP.NET2.0???

When we have to post data from one page to another in application we used server.transfer method but in this the URL remains the same but in cross page posting there is little different there is normal post back is done but in target page we can access values of server control in the source page.This is quite simple we have to only set the PostBackUrl property of Button,LinkButton or imagebutton which specifies the target page.In target page we can access the PreviousPage property.And we have to use the @PreviousPageType directive.We can access control of PreviousPage by using the findcontrol method.When we set the PostBackURL property ASP.NET framework bind the HTML and Javascript function automatically. (More...)

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