<script type="text/javascript">

        $(document).ready(function() {

            $("#<%=btnSearch.ClientID%>").click(function() {

                var vusernamedesc = $("#<%=txtusernamedesc.ClientID%>").val();

                var vcustomerid = $("#<%=txtcustomerid.ClientID%>").val();

                var strjson = jquery.param({'usernamedesc':'vusernamedesc','customerid':'vcustomerid'});

                $.ajax({

                    type: "POST",

                    url: "Ajax.ashx",

                    data: strjson,

                    success: function(strvalue) {

                        if (strvalue == "true") {

                            alert("OK");

                        }

                        else {

                            view(data.msg);

                        }

                    },

                    error: function() {

                        alert("异常");

                    }

                });

            });

        });

    </script>

using System;

using System.Web;



public class Ajax : IHttpHandler {

    

    public  void ProcessRequest (HttpContext context)

    {

        context.Response.ContentType = "application/json";

        string struserDesc = context.Request.QueryString["usernamedesc"];

        string strcustomerid = context.Request.QueryString["customerid"];

        if (struserDesc == "" || strcustomerid == "")

        {

            string strQuery = "Select * from qxtdb.dbo.customer_login where username = '" + struserDesc + "' and customerid = '" + strcustomerid + "'";

        }

    }