ASP.NET jquery ajax传递参数的实例

function LoadBar(id) { 
  var project = id; 
  var month = $("#txtMonth").val(); 
  $.ajax({ 
    type: "GET", 
    async: false, 
    url: 'GetProjectScore.aspx"(" + subtitle + ")"); 
        optionBar.subtitle = t.subtitle; 
        chart = new Highcharts.Chart(optionBar); 
      } 
    }, 
    error: function () { 
      alert('出错了啦!'); 
    } 
  });

$("input[name=returnfile]").click(function () { 
           var returnflag = $(this).val(); 
           var guid = $(this).prev().html(); 
           $.ajax({ 
             type: "POST", 
             async: "false", 
             url: "returndata.aspx", 
             data: "flag=" + returnflag + "&guid="+guid+"", 
             success: function () { 
             } 
           }); 
         })

$("input[name=returnfile]").click(function () { 
           var returnflag = $(this).val(); 
           var guid = $(this).prev().html(); 
           var str = "{'flag':'" + returnflag + "','guid':'" + guid + "'}"; 
           var json = eval("(" + json + ")"); 
           $.ajax({ 
             type: "POST", 
             async: "false", 
             url: "khdf_returndata.aspx",

             dataType:”JSON” 
             data: json, 
             success: function () { 
             } 
           }); 
         })

$(function () {
      $("#btnLogin").click(function () {
        // var username = $("#txtUserName").val();
        // var password = $("#txtPassword").val();
        // var paras = "username=" + username + "&password=" + password;
        // alert(paras);
        var data = {
          username: $("#txtUserName").val(),
          password:$("#txtPassword").val()
        }
        $.post("Home/CheckLogin", data, function (data) {
          alert(data);
        })
      })
    })

[HttpPost]
    public ActionResult CheckLogin(string username,string password)
    {
      string name = username;
      string pwd = password;
      return View();
    }