一、准备工作·Customer类public class Customer
{
public int Unid { get; set; }
public string CustomerName { get; set; }
public string Memo { get; set; }
public string Other { get; set; }
}
二、定义：jQuery.post( url, [data], [callback], [type] )·url：加载页的地址
·data(optional)：k/v对或序列化的字符串（.serialize()），参数
·callbakc(optional)：数据成功加载后的执行函数
·type(optional)：请求返回的数据格式，串型
（1）请求单实体数据这里不对返回的数据做显式的序列化
·Ashx
Customer customer = new Customer
{ Unid = 1, CustomerName = "宋江", Memo = "天魁星", Other = "黑三郎" };
context.Response.Write(customer);
·ajax post
function GetCustomer_Ashx() {
$.post(
"webdata/post_1.ashx",
function(data) {
var sx = $.JsonToObject(data);
var tt = "";
$.each(sx, function(k, v) {
tt += k + "：" + v + "<br/ >";
})
$("#divmessage").html(tt);
},
"json"
);}
（2）请求实体集合·ashx文件
Customer customer = new Customer
{ Unid = 1, CustomerName = "宋江", Memo = "天魁星", Other = "黑三郎" };
Customer customer2 = new Customer
{ Unid = 2, CustomerName = "吴用", Memo = "天机星", Other = "智多星" };
List<Customer > _list = new List<Customer >();
_list.Add(customer);
_list.Add(customer2);
string strJson = Newtonsoft.Json.JsonConvert.SerializeObject(_list);
context.Response.Write(strJson);
·ajax post
function GetCustomer_AshxList() {
$.post(
"webdata/post_1.ashx",
function(data) {
var jsonObjects = $.jsonToObject(data);
var tt = "";
$.each(jsonObjects, function(k, v) {
$.each(v, function(kk, vv) {
tt += kk + "：" + vv + "<br/ >";
});
});
$("#divmessage").html(tt);
},
"json"
);
}
（3）带参数的请求
在前者基础上添加了对请求参数的获取语句，并添加了linq查询
·ashx文件
int iCustomerId = Convert.ToInt32(context.Request["iUnid"]);
var cus = from q in _list
where q.Unid == iCustomerId
select q;
string strJson = Newtonsoft.Json.JsonConvert.SerializeObject(cus);
·ajax post
function GetCustomer_AshxWithPara() {
$.post(
"webdata/post_1.ashx",
{ iUnid: 1 },
function(data) {
var tt = "";
$.each(data, function(k, v) {
$.each(v, function(kk, vv) {
tt += kk + "：" + vv + "<br/ >";
});
});
$("#divmessage").html(tt);
},
"json"
);}
注意，这里返回的直接是json对象[object,object]，可以直接解析。
这种参数传递的方法是以k/v对格式传递，post还有一种方式，那就是.serialize()之后的字串。
（二）Web Service （1）Hello
[WebMethod]
public string HelloWorld()
{
return "Hello World";
}
·ajax post
function WebService_Hello() {
$.post(
"post_1.asmx/HelloWorld",
function(data) {
alert(data.text);
$("#divmessage").html(data);
},
"json"
);}
这个web方法返回一个单独的字串。这是一个纯正的字串，对于客户端来说，这是一个object对象，但也可以
理解为一个[object,object]对象，而它完整的数据格式可以理解为：{text: "Hello World"
所以这里对它进行访问，可以如下：
·data.text 这种方式对应于Object.Property
·data["text"] 这种方式对应于Object["key"]
（2）json串[WebMethod]
public string HelloWorld_Json()
{
string strJson=
@"{Unid:1,CustomerName:""宋江"",Memo:""天魁星"",Other:""黑三郎""}";
return strJson;
}
·ajax post
function WebService_HelloJsonString() {
$.post(
"post_1.asmx/HelloWorld_Json",
function(data) {
var jsonString = data.text;
var jsonObject = $.jsonToObject(jsonString);
var tt = "";
$.each(jsonObject, function(k, v) {
tt += k + "：" + v + "<br/ >";
})
$("#divmessage").html(tt);
},
"json"
);}
虽然服务方法返回的是string类型的数据：
{Unid:1,CustomerName:"宋江",Memo:"天魁星",Other:"黑三郎"}但客户端得到的数据却是object类型，可以理解为[object,object]，也就是{text:’{Unid:1,CustomerName:"宋江",Memo:"天魁星",Other:"黑三郎"} 客户端请求到的数据取到json字串，然后转换为json对象，后进行解析。所以，在请求web服务方法时，如果方法返回字串类型，先要通过data.text得到做为唯一k/v对的v值，也就是json字串，然后再进行下一步操作。
（3）通过串行化返回json字串的web方法
[WebMethod]
public string GetCustomer_Json()
{
Customer customer = new Customer
{ Unid = 1, CustomerName = "宋江", Memo = "天魁星", Other = "黑三郎" };
string strJson = Newtonsoft.Json.JsonConvert.SerializeObject(customer);
return strJson;
}
·ajax post
function WebService_CustomerJsonString() {
$.post(
"post_1.asmx/GetCustomer_Json",
function(data) {
var jsonString = data.text;
var jsonObject = $.jsonToObject(jsonString);
var tt = "";
$.each(jsonObject, function(k, v) {
tt += k + "：" + v + "<br/ >";
})
$("#divmessage").html(tt);
},
"json"
);}
这个方法与（2）相同道理。
（4）客户集[WebMethod]
public string GetCustomerList_Json()
{
Customer customer = new Customer
{ Unid = 1, CustomerName = "宋江", Memo = "天魁星", Other = "黑三郎" };
Customer customer2 = new Customer
{ Unid = 2, CustomerName = "吴用", Memo = "天机星", Other = "智多星" };
List<Customer > _list = new List<Customer >();
_list.Add(customer);
_list.Add(customer2);
string strJson = Newtonsoft.Json.JsonConvert.SerializeObject(_list);
return strJson;
}
·ajax post
function WebService_CustomerListJsonString() {
$.post(
"post_1.asmx/GetCustomerList_Json",
function(data) {
var jsonString = data.text;
var jsonObject = $.jsonToObject(jsonString);
var tt = "";
$.each(jsonObject, function(k, v) {
$.each(v, function(kk, vv) {
tt += kk + "：" + vv + "<br/ >";
});
});
$("#divmessage").html(tt);
},
"json"
);}
其实得到了json字串，也就能正常解析出来。主要是理解返回的数据对象的格式。
（5）带参数[WebMethod]
public string GetCustomerList_JsonPara(int iUnid)
{
Customer customer = new Customer
{ Unid = 1, CustomerName = "宋江", Memo = "天魁星", Other = "黑三郎" };
Customer customer2 = new Customer
{ Unid = 2, CustomerName = "吴用", Memo = "天机星", Other = "智多星" };
List<Customer > _list = new List<Customer >();
_list.Add(customer);
_list.Add(customer2);
var cus = from q in _list
where q.Unid == iUnid
select q;
string strJson = Newtonsoft.Json.JsonConvert.SerializeObject(cus);
return strJson;
}
·ajax post
function WebService_CustomerListJsonStringWithPara() {
$.post("post_1.asmx/GetCustomerList_JsonPara",
{iUnid:2},
function(data) {
var jsonString = data.text;
var jsonObject = $.jsonToObject(jsonString);
var tt = "";
$.each(jsonObject, function(k, v) {
$.each(v, function(kk, vv) {
tt += kk + "：" + vv + "<br/ >";
});
});
$("#divmessage").html(tt);
}
);}
带参数的post时，post函数的type部分不能以json格式请求返回。可以省略。