asp.net+ajax的Post請(qǐng)求實(shí)例

//一個(gè)ajax的Post請(qǐng)求  
    function submitInfo() { 
        $(".warn").hide(); //剛提交的時(shí)候隱藏錯(cuò)誤的信息 
        var data = $("#formData").serialize(); //將表單的數(shù)據(jù)通過(guò)序列化表單值，創(chuàng)建 URL 編碼文本字符串。形成一個(gè)表單元素集合的 jQuery 對(duì)象
        $.post("/login/checkLoginInfo", data, function (ajaxObj) { //將數(shù)據(jù)提交到login控制器下的CheckLOginInfo方法。參數(shù)是data。  如果請(qǐng)求成功，function就是請(qǐng)求成功時(shí)執(zhí)行的回調(diào)函數(shù)。ajaxObj是checkLoginInfo方法的返回?cái)?shù)據(jù) 
            //回傳內(nèi)容{status: 1(success)/0(fail),} 
            if (ajaxObj.status == 0 || status == null) { //如果返回狀態(tài)為0或者為null  
                $(".warn").show(); //將錯(cuò)誤信息顯示出來(lái) 
            } else { 
                //登陸成功，跳轉(zhuǎn)都制定頁(yè)面 
                window.location = '/HotelList/Index'; 
            } 
        }, "json"); 
}

$.post("/ajax/UserLogin.ashx",
    { "username": username, "password": password },
    loginFinish);

html xmlns="http://www.w3.org/1999/xhtml"> 
head runat="server"> 
    title>/title> 
    link href="/css/ui-lightness/jquery-ui-1.8.2.custom.css" rel="stylesheet" type="text/css" /> 
    script src="/js/jquery-1.4.2.js" type="text/javascript">/script> 
    script src="/js/jquery-ui-1.8.2.custom.js" type="text/javascript">/script> 
    script type="text/javascript"> 
        //向服務(wù)器請(qǐng)求當(dāng)前登錄狀態(tài)，然后切換登錄區(qū)域的顯示 
        var checkLogin = function () { 
            $.post("/ajax/CheckLogin.ashx", function (data) { 
                var strs = data.split("|"); 
                if (strs[0] == "no") { 
                    //alert("木有登陸"); 
                    $("#divLoginArea").show(); //如果沒(méi)有登陸就顯示"登陸" 
                    $("#divLoginOutArea").hide(); //隱藏"注銷(xiāo)" 
                } 
                else { 
                    //切換“登錄”、“注銷(xiāo)”的兩個(gè)層 
                    $("#divLoginArea").hide(); //隱藏"登陸" 
                    $("#divLoginOutArea").show(); //顯示 "注銷(xiāo)" 
                    $("#spanUserName").text(strs[1]);//把當(dāng)前登錄用戶(hù)名顯示出來(lái) 
                } 
            }); 
        } 
 
        var loginFinish = function (data) {  //這是一個(gè)回調(diào)函數(shù) 
            if (data == "ok") { 
                //alert("成功"); 
                $("#divLogin").dialog("close"); //登錄成功關(guān)閉窗口 
                checkLogin();//登錄成功，刷新登錄區(qū)域的顯示 
            } 
            else { 
                alert("用戶(hù)名密碼錯(cuò)誤"); 
            } 
        }; 
        $(function () { 
            $("#btnShowLoginDlg").click(function () { 
                $("#divLogin").dialog({ 
                    height: 200, 
                    modal: true 
                }); 
            }); 
            $("#btnLogin").click(function () {  //當(dāng)用戶(hù)點(diǎn)擊"登陸" 控件觸發(fā)事件 
                //todo:檢驗(yàn)用戶(hù)名、密碼不能為空 
                var username = $("#txtUserName").val(); 
                var password = $("#txtPwd").val(); 
                $.post("/ajax/UserLogin.ashx",//----------------------請(qǐng)關(guān)注這條$.Post()請(qǐng)求的參數(shù)與回調(diào)函數(shù) 
                    { "username": username, "password": password }, 
                    loginFinish); 
            }); 
        }); 
 
        $(function () { 
            checkLogin();//剛進(jìn)入頁(yè)面的時(shí)候也是先向服務(wù)器查詢(xún)當(dāng)前登錄狀態(tài) 
            $("#btnLogout").click(function () { 
                $.post("/ajax/Logout.ashx", function () { 
                    checkLogin();//刷新顯示 
                }); 
            }); 
        }); 
    /script> 
    asp:ContentPlaceHolder ID="head" runat="server"> 
    /asp:ContentPlaceHolder> 
/head> 
body> 
    form id="form1" runat="server"> 
    div> 
        div id="divLoginArea" style="display:none">input type="button" value="登錄" id="btnShowLoginDlg" />/div> 
        div id="divLoginOutArea" style="display:none"> 
            span id="spanUserName">/span> 
            input type="button" value="注銷(xiāo)" id="btnLogout" /> 
        /div> 
        div id="divLogin" title="登錄窗口"  style="display:none"> 
            table> 
                tr>td>用戶(hù)名：/td>td>input type="text"  id="txtUserName"/>/td>/tr> 
                tr>td>密碼：/td>td>input type="password"  id="txtPwd"/>/td>/tr> 
                tr>td colspan="2">input type="button" value="登錄" id="btnLogin" />/td>/tr> 
            /table> 
        /div> 
        br /> 
        asp:ContentPlaceHolder ID="placeHolderMain" runat="server"> 
        /asp:ContentPlaceHolder> 
        br /> 
         尾部br /> 
    /div> 
    /form> 
/body> 
/html>