EXTJS 资料 Ext.Ajax.request 获取返回数据

下面是一个登陆页面调用的EXTJS

login function，通过  url: '/UI/HttpHandlerData/Login/Login.ashx',获取返回登陆账户和密码！

Ext.onReady(function () {



    login = function (target) {

        if (eval(document.getElementById('TxtUserName')).value == "") {

            alert("提示! 请输入账户!"); return false;

        }

        else if (eval(document.getElementById('TxtPassword')).value == "") {

            alert("提示!请输入密码!"); return false;

        }

        else {

            var username = eval(document.getElementById('TxtUserName')).value;

            var password = eval(document.getElementById('TxtPassword')).value;



            Ext.Ajax.request({

                url: '/UI/HttpHandlerData/Login/Login.ashx',

                method: 'POST',

                clientValidation: true,

                waitMsg: '正在提交数据...',

                waitTitle: '提示',

                params: {

                    username: username,

                    password: password

                },

                success: function (response) {

                    var data = Ext.decode(response.responseText);

                    //设置Cookie

                    new Extjs.cookie.set(data.userid, data.username);

                    window.location.href = "../Page/InformationManagement/Index.html";

                },

                failure: function () {

                    Ext.Msg.alert("提示", "登陆失败，请与管理员联系！");

                }

            });

        }

    }

});

后台代码：

这是在一般处理程序中的代码：

  public void ProcessRequest(HttpContext context)

        {





            string username = context.Request.Form["username"];

            string password = context.Request.Form["password"];

            int intUserID = 0;

            DataSet ds = saBLL.Login(username, password);



            //客户端输出变量

            string strResult = string.Empty;

            if (ds.Tables[0].Rows.Count > 0)

            {

                //用户不存在

                if (ds == null)

                    strResult = "{success:true,flag:false,msg:'用户不存在!'}";

                //用户密码不正确

                else if (ds.Tables[0].Rows[0]["Password"].ToString() != password)

                    strResult = "{success:true,flag:false,msg:'用户密码不正确!'}";

                //正确

                else

                {

                    intUserID = Convert.ToInt32(ds.Tables[0].Rows[0]["AccountId"].ToString());

                    strResult = "{success:'true',flag:'true',userid:'" + intUserID + "',username:'" + ds.Tables[0].Rows[0]["LoginName"] + "'}";

                }

            }

            else

            {

                strResult = "{success:true,flag:false,msg:'用户不存在!'}";

            }



            //客户端输出

            context.Response.Write(strResult);



        }