aspx代码：
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<html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <script src="http://code.jquery.com/jquery-latest.js" type="text/javascript"></script> <script type="text/javascript"> $(function () { $("#ajax").click(function () { $.post("Ajax1.aspx", { action: "check", name: "2013" }, function (data) { var json = eval("(" + data + ")"); alert(json.ID); }); }); }); </script> </head> <body> <form id="form1" runat="server"> <div> <input type="button" id="ajax" value="Ajax1" /> </div> </form> </body> </html>
.cs代码：
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public partial class Ajax1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (Request["action"] != null) { Check(); } } private void Check() { WriteJson("ID",Request["name"]); } /// <param name="key"></param> /// <param name="val"></param> private static void WriteJson(string key, string val) { HttpContext.Current.Response.Write(GetJSON(key, val)); HttpContext.Current.Response.ContentType = "text/plain"; //设置MIME格式 HttpContext.Current.Response.End(); } /// <summary> /// 获取JSON字符串 /// </summary> /// <param name="dic"></param> /// <returns></returns> private static string GetJSON(string key, string val) { return string.Format("{{\"{0}\":\"{1}\"}}", key, val); } }