How to call Javascript method from code behind

Question

I am a beginner in Javascript.

I have a javascript function

Print: function () {
......
}

in my "testing.js" file.

now I need to call this "Print" function from a code behind method. How to do...?

I tried all the below but failed every time

http://forums.asp.net/t/1785410.aspx?how+to+call+javascript+function+from+code+behind+cs+file+

How to call this javascript function from code behind

and many many..... but didnot get a solution..Any help me to come out from this?

I was working for a day in this and all in vain.

Is the 'mvc' tag referring to ASP.NET MVC? If it is, then there's no real notion of 'code behind' in ASP.NET MVC... — Patryk Ćwiek
– Patryk Ćwiek, Commented Mar 17, 2014 at 12:08
@PatrykĆwiek: HI, yes ASP.NET MVC, I would like to have a method name print and in that method i would like to call this JS "Print" function — Uthistran Selvaraj.
– Uthistran Selvaraj., Commented Mar 17, 2014 at 12:13
You don't call javascript functions directly from server code, it's completely separate domains. The javascript page doesn't even exist yet unless the server code is invoked from Ajax. — asawyer
– asawyer, Commented Mar 17, 2014 at 12:16
It may be helpful to get a better picture of what you are trying to accomplish. When you say "code behind", are you wanting the server to tell the browser to print? Or are you wanting a button on your page to call the print function? Or something else? — Claies
– Claies, Commented Mar 17, 2014 at 12:27
your question suffers from the XY problem. You should ask how to solve your problem, rather than ask why your solution doesn't work. meta.stackexchange.com/questions/66377/what-is-the-xy-problem — Claies
– Claies, Commented Mar 17, 2014 at 12:33

knightsb · Accepted Answer · 2014-03-17 12:50:29Z

asp.net mvc and asp.net win-forms are different technologies. in mvc you do not have a code behind, there is a better isolation between server and client side. there for there are some options depend on you'r status :

1)if the trigger happens on client you can bind this trigger to a js or jquery function

jquery Example:

$('#IDOFButton').bind('click',function(){
   //call print function
   print();
});

2)if the trigger happens on server you can send back a js in a script tag to run immediately as it returns to client

public JavaScriptResult Print()
        {
            JavaScriptResult js = new JavaScriptResult();
            js.Script = "alert('hello');";
            return js;
        }

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