Question

Javascript Code:

function jsfunction ()
{
var sayi = 9999;
alert('<%= cfunction("'+sayi+'")%>');
} 

C# Code:

public string cfunction(string gelen)
{
 return gelen;
} 

Normally,There is should be 9999 value which is send to C# code from javascript code,but,this value returning as '+sayi+'.
Also,that’s gives me alert 9999.What am I wrong?

Answer 1

C# (server-side) can generate markup for client side, client side can’t call back up to server-side without some kind of Ajax type web request.

To do what you’re looking for you can create a C# webmethod

[WebMethod()]
public static string cfunction(string gelen)
{
    return gelen;
}

And consume the webmethod with a client-side jQuery.ajax() method (You’ll need the jQuery library script if you don’t have it already)

function jsfunction() {
    var sayi = 9999;
    $.ajax({
        type: "POST",
        url: "YOUR-ASPX-PAGE.aspx/cfunction",
        data: "{gelen:'" + sayi + "'}",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function(msg) {
            alert(msg.d);
        }
    });
}