.net Ajax与后台一般处理程序(ashx) 交互

时间:2022-09-27 16:55:05

    本文主要实现无动态刷新查询后台数据功能,主要用到ajax+ashx+sqlserver进行交互.

首先需要引用Jquery:

 <script language="javascript" type="text/javascript" src="../js/jquery.js">

html脚本:

<asp:TextBox ID="tb_corpName" runat="server" MaxLength="100" Width="369px"></asp:TextBox>

前台通过一个事件来调用ashx:

<script type="text/javascript">
$(function () {
$("#tb_corpName").blur(function () {    //鼠标失去焦点事件
var corpName = $("#tb_corpName").val();
$.ajax({
type: "post", //提交方式
url: "/ashx/FZGpyShowData.ashx", //一般处理程序的路径
data: { corpName: corpName }, //向后台传入的值
dataType: "json", //返回值格式
success: function (data) { //返回成功后将要做的事,这里是返回一个表
$("#tb_CreditCode").val(data[0].CreditCode);
$("#tb_corpCode").val(data[0].CorpCode);
$("#tb_linkTel").val(data[0].LinkPhone); $("#corpProvince option[text='" + data[0].StateName + "']").attr("selected", true);
showCity();
$("#corpCity option[text='" + data[0].AdminAreaName + "']").attr("selected", true); $("#tb_address").val(data[0].Address);
$("#tb_linkMan").val(data[0].LinkMan);
$("#tb_Mobile").val(data[0].LinkMobile);
}
});
})
})
</script>

后台来接收前台传过来的值,对其进行操作:

     public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
string corpName = context.Request["corpName"].Trim().ToString();      //接收前台传过来的参数
if (corpName != "")
{
string sql = @"select top 1 CorpName,CreditCode,CorpCode,LinkPhone,StateName,AdminAreaName,LinkMan,LinkMobile,Address from tbProductOrder as a
inner join tbStateDic as b on a.StateNum = b.StateNum
inner join tbAdminAreaClass on a.CityNum = AdminAreaClassID
where CorpName =@CorpName order by CorpName";
SqlParameter[] par = new SqlParameter[];
par[] = new SqlParameter("@CorpName", corpName);
DataSet ds = DBHerpler.Load(sql, par);
string json = SerializerHelper.ToJsonString(ds.Tables[]);    //返回json类型的数据
context.Response.Write(json);                      
context.Response.End();
}
}

SerializerHelper类的定义:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using System.IO;
using System.Xml.Serialization;
using Newtonsoft.Json; /// <summary>
/// SerializerHelper 的摘要说明
/// </summary>
public static class SerializerHelper
{
/// <summary>
/// 反序列化XML文件
/// </summary>
public static T LoadFromXmlFile<T>(string filepath) where T : class
{
using (FileStream stream = new FileStream(filepath, FileMode.Open, FileAccess.Read))
{
XmlSerializer serializer = new XmlSerializer(typeof(T));
return (T)serializer.Deserialize(stream);
}
} /// <summary>
/// 反序列化XML字符串
/// </summary>
public static T LoadFromXmlString<T>(string xml) where T : class
{
XmlSerializer serializer = new XmlSerializer(typeof(T));
byte[] bytes = Encoding.UTF8.GetBytes(xml); using (MemoryStream stream = new MemoryStream(bytes))
{
return (T)serializer.Deserialize(stream);
}
} /// <summary>
/// 序列化XML对象
/// </summary>
public static string SaveToXmlString<T>(T entity) where T : class
{
using (MemoryStream stream = new MemoryStream())
{
XmlSerializer serializer = new XmlSerializer(typeof(T));
serializer.Serialize(stream, entity);
return Encoding.UTF8.GetString(stream.ToArray());
}
} /// <summary>
/// 序列化Json对象
/// </summary>
public static string ToJsonString(object obj)
{
return ToJsonString<object>(obj);
} /// <summary>
/// 序列化Json对象
/// </summary>
public static string ToJsonString<T>(T obj) where T : class
{
string text = JsonConvert.SerializeObject(obj);
return text;
} /// <summary>
/// 反序列化Json字符串
/// </summary>
public static T ToJsonObject<T>(string text) where T : class
{
T obj = (T)JsonConvert.DeserializeObject(text, typeof(T));
return obj;
}
}

如果向后台传入多个参数在data里面用逗号分割可写多个参数:

    data: { corpName: corpName , corpName2: corpName2}