Simple example of JQuery Ajax WebService passing parameters

When using jQuery to implement Ajax in Asp.NET, aspx, ashx, and WebService can be used on the server side. I recently studied the WebService method. This post gives a very detailed example of jQuery Ajax method call jQuery Ajax method call Asp.Net WebService detailed example code, but does not give a detailed explanation. There were several details that I didn't pay attention to at first, but it took a lot of effort to solve them:

1) The key field name in the client data must be strictly consistent with the server-side method parameters.

For example, the client:

//有参数调用
   $(document).ready(function () {
     $("#btn2").click(function () {
       $.ajax({
         type: "POST",
         contentType: "application/json",
         url: "WebService.asmx/GetWish",
         data: "{value1:'心想事成',value2:'万事如意',value3:'牛牛牛',value4:2009}",
         dataType: 'json',
         success: function (result) {
           $('#dictionary').append(result.d);
         }
       });
     });
   });

The GetWish function parameters on the server side must be written as value1, value2, value3, value4:

[WebMethod]
public string GetWish(string value1, string value2, string value3, int value4)
{
  return string.Format("祝您在{3}年里 {0}、{1}、{2}", value1, value2, value3, value4);
}

2) The method for the client to pass objects to the server:

Client Code:

//传入对象
   $(function () {
     $("#btn6").click(function () {
       obj = new Object();
       obj.ID = "1";
       obj.Value = "aaa";
       //'{"obj":{"ID":"1",Value:"Horse"}}'
       var d = '{"obj":' + JSON.stringify(obj) + '}';
       $.ajax({
         type: "POST",  //访问WebService使用Post方式请求
         contentType: "application/json", //WebService 会返回Json类型
         url: "WebService.asmx/ParmsObject", //调用WebService的地址和方法名称组合 ---- WsURL/方法名
         data: d,     //这里是要传递的参数，格式为 data: "{paraName:paraValue}",下面将会看到   
         dataType: 'json',
         success: function (result) {
           alert(result.d);
         },
         error: function (result) {
           alert("fail");
         }
       });
     });
 
   });

Server-side code:

[WebMethod]
public string ParmsObject(Class1 obj)
{
 
  return obj.ID + ":" + obj.Value;
}

Debugging environment: VS2010+jquery-1.3.2.min.js