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jquery.Ajax() method calls Asp.Net background method analysis
jquery.Ajax() method calls Asp.Net background method analysis
Using JQuery’s $.ajax() can easily call asp.net’s background methods.
Let’s warm up with a simple example first.
1. Method call without parameters
asp.net code:
using System.Web.Script.Services;
[WebMethod]
public static string SayHello()
{
return "Hello Ajax!";
}
using System.Web.Script.Services;
[WebMethod]
public static string SayHello()
{
return "Hello Ajax!";
}Note: 1. The method must be a static method and must have the declaration of [WebMethod]
JQuery code:
/// <reference path="jquery-1.4.2-vsdoc.js"/>
$(function() {
$("#btnOK").click(function() {
$.ajax({
//要用post方式
type: "Post",
//方法所在页面和方法名
url: "data.aspx/SayHello",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(data) {
//返回的数据用data.d获取内容
alert(data.d);
},
error: function(err) {
alert(err);
}
});
//禁用按钮的提交
return false;
});
});
/// <reference path="jquery-1.4.2-vsdoc.js"/>
$(function() {
$("#btnOK").click(function() {
$.ajax({
//要用post方式
type: "Post",
//方法所在页面和方法名
url: "data.aspx/SayHello",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(data) {
//返回的数据用data.d获取内容
alert(data.d);
},
error: function(err) {
alert(err);
}
});
//禁用按钮的提交
return false;
});
});Result:
2. Method call with parameters
asp.net code:
using System.Web.Script.Services;
[WebMethod]
public static string GetStr(string str, string str2)
{
return str + str2;
}
using System.Web.Script.Services;
[WebMethod]
public static string GetStr(string str, string str2)
{
return str + str2;
}JQuery code:
/// <reference path="jquery-1.4.2-vsdoc.js"/>
$(function() {
$("#btnOK").click(function() {
$.ajax({
type: "Post",
url: "data.aspx/GetStr",
//方法传参的写法一定要对，str为形参的名字,str2为第二个形参的名字
data: "{'str':'我是','str2':'XXX'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(data) {
//返回的数据用data.d获取内容
alert(data.d);
},
error: function(err) {
alert(err);
}
});
//禁用按钮的提交
return false;
});
});
/// <reference path="jquery-1.4.2-vsdoc.js"/>
$(function() {
$("#btnOK").click(function() {
$.ajax({
type: "Post",
url: "data.aspx/GetStr",
//方法传参的写法一定要对，str为形参的名字,str2为第二个形参的名字
data: "{'str':'我是','str2':'XXX'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(data) {
//返回的数据用data.d获取内容
alert(data.d);
},
error: function(err) {
alert(err);
}
});
//禁用按钮的提交
return false;
});
});Running result:
Enter the advanced application below
3. Calling the method that returns an array
asp.net code:
using System.Web.Script.Services;
[WebMethod]
public static List<string> GetArray()
{
List<string> li = new List<string>();
for (int i = 0; i < 10; i++)
li.Add(i + "");
return li;
}
using System.Web.Script.Services;
[WebMethod]
public static List<string> GetArray()
{
List<string> li = new List<string>();
for (int i = 0; i < 10; i++)
li.Add(i + "");
return li;
}JQuery code :
/// <reference path="jquery-1.4.2-vsdoc.js"/>
$(function() {
$("#btnOK").click(function() {
$.ajax({
type: "Post",
url: "data.aspx/GetArray",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(data) {
//插入前先清空ul
$("#list").html("");
//递归获取数据
$(data.d).each(function() {
//插入结果到li里面
$("#list").append("<li>" + this + "</li>");
});
alert(data.d);
},
error: function(err) {
alert(err);
}
});
//禁用按钮的提交
return false;
});
});
/// <reference path="jquery-1.4.2-vsdoc.js"/>
$(function() {
$("#btnOK").click(function() {
$.ajax({
type: "Post",
url: "data.aspx/GetArray",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(data) {
//插入前先清空ul
$("#list").html("");
//递归获取数据
$(data.d).each(function() {
//插入结果到li里面
$("#list").append("<li>" + this + "</li>");
});
alert(data.d);
},
error: function(err) {
alert(err);
}
});
//禁用按钮的提交
return false;
});
});Run result:
4. Return the call of Hashtable method
asp.net code:
using System.Web.Script.Services;
using System.Collections;
[WebMethod]
public static Hashtable GetHash(string key,string value)
{
Hashtable hs = new Hashtable();
hs.Add("www", "yahooooooo");
hs.Add(key, value);
return hs;
}
using System.Web.Script.Services;
using System.Collections;
[WebMethod]
public static Hashtable GetHash(string key,string value)
{
Hashtable hs = new Hashtable();
hs.Add("www", "yahooooooo");
hs.Add(key, value);
return hs;
}JQuery code:
/// <reference path="jquery-1.4.2-vsdoc.js"/>
$(function() {
$("#btnOK").click(function() {
$.ajax({
type: "Post",
url: "data.aspx/GetHash",
//记得加双引号 T_T
data: "{ 'key': 'haha', 'value': '哈哈！' }",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(data) {
alert("key: haha ==> "+data.d["haha"]+"\n key: www ==> "+data.d["www"]);
},
error: function(err) {
alert(err + "err");
}
});
//禁用按钮的提交
return false;
});
});
/// <reference path="jquery-1.4.2-vsdoc.js"/>
$(function() {
$("#btnOK").click(function() {
$.ajax({
type: "Post",
url: "data.aspx/GetHash",
//记得加双引号 T_T
data: "{ 'key': 'haha', 'value': '哈哈！' }",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(data) {
alert("key: haha ==> "+data.d["haha"]+"\n key: www ==> "+data.d["www"]);
},
error: function(err) {
alert(err + "err");
}
});
//禁用按钮的提交
return false;
});
});Run result:
5. Operation xml
XMLtest.xml:
<?xml version="1.0" encoding="utf-8" ?>
<data>
<item>
<id>1</id>
<name>qwe</name>
</item>
<item>
<id>2</id>
<name>asd</name>
</item>
</data>
<?xml version="1.0" encoding="utf-8" ?>
<data>
<item>
<id>1</id>
<name>qwe</name>
</item>
<item>
<id>2</id>
<name>asd</name>
</item>
</data>JQuery code :
$(function() {
$("#btnOK").click(function() {
$.ajax({
url: "XMLtest.xml",
dataType: 'xml', //返回的类型为XML ，和前面的Json，不一样了
success: function(xml) {
//清空list
$("#list").html("");
//查找xml元素 KVM 网上购物 毛刷 网站建设 北京快递公司 超声波焊接机
$(xml).find("data>item").each(function() {
$("#list").append("<li>id:" + $(this).find("id").text() +"</li>");
$("#list").append("<li>Name:"+ $(this).find("name").text() + "</li>");
})
},
error: function(result, status) { //如果没有上面的捕获出错会执行这里的回调函数
alert(status);
}
});
//禁用按钮的提交
return false;
});
});
$(function() {
$("#btnOK").click(function() {
$.ajax({
url: "XMLtest.xml",
dataType: 'xml', //返回的类型为XML ，和前面的Json，不一样了
success: function(xml) {
//清空list
$("#list").html("");
//查找xml元素
$(xml).find("data>item").each(function() {
$("#list").append("<li>id:" + $(this).find("id").text() +"</li>");
$("#list").append("<li>Name:"+ $(this).find("name").text() + "</li>");
})
},
error: function(result, status) { //如果没有上面的捕获出错会执行这里的回调函数
alert(status);
}
});
//禁用按钮的提交
return false;
});
});[10.121.158.27:4002] Too many user code to run when -usercode_in_pthread is on
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