C # asp.net MVC configuration allows cross-domain access

Add the following configuration under the System.webserver node in the Web.config file:

<system.web>
  <authentication mode= "None"/>
  <compilation debug= "true" targetframework= "4.5" />
  
 


Specify that sites allow Cross-domain access (base class)


Using System;
Using System.Collections.Generic;
Using System.Linq;
Using System.Web;

Using SYSTEM.WEB.MVC; Namespace Webapplication1.app_start {public class Alloworiginattribute {public static void Onexcute (Cont Rollercontext context, string[] Allowsites} {var origin = context.
            httpcontext.request.headers["Origin"]; Action action = () => {context.

            HttpContext.Response.AppendHeader ("Access-control-allow-origin", Origin);
            };
                if (allowsites!= null && allowsites.any ()) {if (Allowsites.contains (Origin))
                {action (); }}} public class Actionalloworiginattribute:actionfilterattribute {public
        String[] Allowsites {get; set;} public override void OnActionExecuting (System.Web.Mvc.ActionExecutingContext filtercontext) {Allowori GiNattribute.onexcute (Filtercontext, allowsites); Base.
        OnActionExecuting (Filtercontext); } public class Controlleralloworiginattribute:authorizeattribute {public string[] Allowsites {ge T Set } public override void Onauthorization (System.Web.Mvc.AuthorizationContext filtercontext) {Al
        Loworiginattribute.onexcute (Filtercontext, allowsites); }

    }
}
 

 

Specifies that controller allows cross-domain access


[Controlleralloworigin (allowsites = new string[] {"http://localhost:52559"})]
public class Citycontroller:controller
{}
 

 

Specifies that the action allows Cross-domain access


[HttpPost]
[Actionalloworigin (allowsites = new string[] {"http://localhost:52559"})]
Public ActionResult addcity (string userName, string password)
{
    var a = UserName;
    var b = password;

    Return Json (new
    {
        Code =,
        msg = "123",
        data = ""
    }, Jsonrequestbehavior.allowget);
 

 
HTML page 

 


@{Layout = null;} <! DOCTYPE html>  


XMLHttpRequest (native)


function Loginnew () {

    var barcode = document.getElementById ("barcode"). Value;
    var name = document.getElementById ("name"). Value;

    Console.log ("1:" + barcode + "; 2:" + name);

    Create asynchronous Object
    var xmlhttp = new XMLHttpRequest ();
    Sets the type of request and the URL
    xmlhttp.open (' Post ', ' http://localhost:52556/api/AssetOa?IsAddAsset=true ', true);

    Post requests must be added to the request header to do otherwise the error will be
    //xmlhttp.setrequestheader ("Content-type", "Application/json");
    Xmlhttp.setrequestheader ("Content-type", "application/x-www-form-urlencoded");

    Send Request
    //xmlhttp.send (' {"Barcode ': ' + Barcode + ', ' name ': ' + name + '} ');
    Xmlhttp.send (' {"barcode= ' + Barcode + ' &name= ' + Name + ' &assettypeid=1} ');
    Xmlhttp.onreadystatechange = function () {
        //This step is to determine if the server is responding correctly if
        (xmlhttp.readystate = 4 && Xmlhttp.status = =) {
            console.log (xmlhttp.responsetext);}}

 

 


 D:\MyFile\ test Project \solution1\webapplication1