1、页面script代码-【model数据、字符串】
<script type="text/javascript" charset="utf-8" src="Js/jquery-1.6.2.min.js"></script>
<script type="text/javascript">
//提交验证
function ChekFrom()
{
var msg = "";
//取值
var UserName = $("#txtUserName").val();
//验证
if (UserName == "") {
msg += "用户名为空！/r/n";
} else {
$.ajax({
type: "POST",
url: "/Controller/UserHandler.ashx",
data: { Action: "IsUserName", UserName: UserName },
cache: false, //设置时候从浏览器中读取 缓存 true 表示 是
datatype: "json",
async: false,
success: function (result) {
if (result.code == 1) {
msg += "该用户名已存在！/r/n";
}
}
});
}
if (msg == "") {
return true;
} else {
alert(msg);
return false;
}
}
//总计金额 可以写成js方法
function BuyTotal() {
var Total = $.ajax({
type: "POST",
dataType: text,//xml html script json
url: "/Controller/UserHandler.ashx",
data: { Action: "BuyTotal" },
async: false
}).responseText;
return Total;
}
</script>
2、返回Model的handler代码
<%@ WebHandler Language="C#" Class="UserHandler" %>
using System;
using System.Web;
using ECS.Utility;
using System.Collections.Generic;
//使用session的时候必须继承IRequiresSessionState接口：, System.Web.SessionState.IRequiresSessionState
public class UserHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
//全局默认返回信息
string Json = JsonUtil.Serialize(new { code = 0, msg = "" });
//取值
string Action = context.Request.Form["Action"] == null ? "" : context.Request.Form["Action"].ToString().Trim();
string UserName = context.Request.Form["UserName"] == null ? "" : context.Request.Form["UserName"].ToString().Trim();
//判断
if (!string.IsNullOrEmpty(Action))
{
//验证用户
if (Action.Equals("IsUserName"))
{
//验证
if (IsExistUser(UserName))
{
Json = JsonUtil.Serialize(new { code = 1, msg = "用户名已存在！" });
}
else
{
Json = JsonUtil.Serialize(new { code = 0, msg = "用户名可以注册！" });
}
}
//计算金额
if (Action.Equals("BuyTotal"))
{
//Json格式
//Json = JsonUtil.Serialize(new { code = 1, msg = "成功", Total = 100 });
//
Json = "100";
}
else
{ //Json格式
//Json = JsonUtil.Serialize(new { code = 0, msg = "失败", Total = 0 });
Json = "0";
}
}
//最终返回信息
context.Response.Write(Json);
}
/// <summary>
/// 判断UserName是否存在
/// </summary>
/// <param name="userName">用户名</param>
/// <returns>返回true or false</returns>
public bool IsExistUser(string userName)
{
List<LSY.Model.A_User> UserList = new LSY.BLL.A_User().GetList(null, "UserName='" + userName.Trim() + "'and Type=0", null);
if (UserList.Count > 0)
{
return true;
}
else
{
return false;
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
3、页面script代码-【DataTable、List】
//查询城市
function getCity(CityVal) {
var DDL_Province = $("#DDL_Province");
var DDL_City = $("#DDL_City");
DDL_City.empty();
DDL_City.append("<option value=\"0\">市/区</option>");
$.ajax(
{
type: "post",
url: "/UserCart/Controller/CityAreas.ashx",
data: { "type": "city", "provinceID": DDL_Province.val() },
dataType: "json",
async: false,
success: function (msg) {
for (var i = 0; i < msg.length; i++) {
if (CityVal == msg[i].CityName) {
if (msg[i].IsCOD == 1) {
DDL_City.append("<option value=" + msg[i].CityID + " selected=\"selected\">" + msg[i].CityName + "*</option>");
} else {
DDL_City.append("<option value=" + msg[i].CityID + " selected=\"selected\">" + msg[i].CityName + "</option>");
}
} else {
if (msg[i].IsCOD == 1) {
DDL_City.append("<option value=" + msg[i].CityID + " >" + msg[i].CityName + "*</option>");
} else {
DDL_City.append("<option value=" + msg[i].CityID + " >" + msg[i].CityName + "</option>");
}
}
}
getArea('');
GetAddreesSpan();
}
})
};
4、返回数据集Handler代码
<%@ WebHandler Language="C#" Class="CityAreas" %>
using System;
using System.Web;
using System.Collections.Generic;
public class CityAreas : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
if (context.Request["type"] == "city")
{
context.Response.Write(select2(context.Request["provinceID"]));
}
else if (context.Request["type"] == "district")
{
context.Response.Write(select3(context.Request["cityID"]));
}
}
public string select2(string id)
{
string str = string.Empty;
if (!string.IsNullOrEmpty(id))
{
List<ECS.Model.A_CityAreas> list = new ECS.BLL.A_CityAreas().GetList(null, "deep=2 and ParentID=" + id, null);
if (list != null && list.Count > 0)
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
sb.Append("[");
foreach (ECS.Model.A_CityAreas item in list)
{
sb.Append("{");
sb.Append("\"CityID\":\"" + item.id + "\",\"CityName\":\"" + item.AreaName + "\",\"IsCOD\":\"" + item.IsCOD + "\"");
sb.Append("},");
}
sb.Remove(sb.Length - 1, 1);
sb.Append("]");
str = sb.ToString();
}
}
return str;
}
public string select3(string id)
{
string str = string.Empty;
if (!string.IsNullOrEmpty(id))
{
List<ECS.Model.A_CityAreas> list = new ECS.BLL.A_CityAreas().GetList(null, "deep=3 and ParentID=" + id, null);
if (list != null && list.Count > 0)
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
sb.Append("[");
foreach (ECS.Model.A_CityAreas item in list)
{
sb.Append("{");
sb.Append("\"DistrictID\":\"" + item.id + "\",\"DistrictName\":\"" + item.AreaName + "\",\"IsCOD\":\"" + item.IsCOD + "\"");
sb.Append("},");
}
sb.Remove(sb.Length - 1, 1);
sb.Append("]");
str = sb.ToString();
}
}
return str;
}
public bool IsReusable
{
get
{
return false;
}
}
}