Calling C# function through Javascript (without Json)

Question

I have a function named \"callfunction()\" in JavaScript(Mypage.aspx) .This function should call another function \"func()\" in C# (Mypage.aspx.cs )

Something like

Answer 1

If it's a webforms project (not MVC) and you don't want to use AJAX, you can use __doPostBack.

<script type="text/javascript">
 function callfunction(parameter)
 {
     __doPostBack('func', parameter)
 }
</script>

C#:

public void Page_Load(object sender, EventArgs e)
{
  string parameter = Request["__EVENTARGUMENT"]; // parameter
  var senderObject = Request["__EVENTTARGET"]; // func
  if(senderObject == "func")
  {
     //call your function here, or write the implementation
  }
}

Answer 2

below are the options available to you

1. If your using asp.net then use Ajax tools to create this

2. if you don’t want to user Ajax toolkit use JavaScript __doPostBack

3. or other option write server side function in the web service and call web method using JavaScript

Answer 3

Ok....Try using page methods

First add a script manager on your aspx page

  <asp:ScriptManager ID="scpt" runat="server" EnablePageMethods="true">
</asp:ScriptManager>

Then go to your aspx.cs page and declare a function something like

[System.Web.Services.WebMethod]
    public static string ValidateUser(string emailId, string password)
    {
        //Your logic code
        return returnString;
    }

Then from your javascript call the c# method like

 PageMethods.ValidateUser(email, password, CallSuccess_Login, CallFailed_Login);

And also in ur javascript create 2 call back functions CallSuccess_Login and CallFailed_Login

Hope it helps