Question

I have the following request:

var response = $.ajax({
    type: "POST",
    contentType: "application/x-www-form-urlencoded",
    url: this.AgentServiceUrl + "/" + methodName,
    data: data,
    async: this.Async,
    success: function (xml, textStatus) { if (successHandler != null) successHandler(state, $.xml2json(xml), textStatus); },
    error: function (xmlHttpRequest, textStatus, errorThrown) { if (errorHandler != null) errorHandler(state, xmlHttpRequest, textStatus, errorThrown); }
});

I want to add to a variable to this request header and consume it on C#,

I try many ways but I can’t consume it on C#:

1.  beforeSend: function (req)  
    {  
        req.setRequestHeader("AgentGUID", this.AgentGUID);  
    },
   

2. Pass parameters:

Can you help me? I don’t want to change the function at the C# part I just want to use something like:

(System.Web.HttpContext.Current.Request.Headers["someHeader"]

Answer 1

Your beforeSend should work as you wish, but the reason you are not getting the value on server side is that this.AgentGUID on this method call is undefined because this in that context is pointing to another object (most probably ajax request object).

By defining a variable outside your ajax call you issue will be fixed.

var me = this;
var response = $.ajax({
    ...
    beforeSend: function (req)
    {
        req.setRequestHeader("AgentGUID", me.AgentGUID);
    },
    ...
});