jquery.Ajax() method calls Asp.Net background method analysis-C#.Net Tutorial-php.cn

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!"; }

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Note: 1. The method must be a static method and must have the declaration of [WebMethod]

JQuery code:

///  $(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; }); }); ///  $(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; }); });

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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; }

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JQuery code:

///  $(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; }); }); ///  $(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; }); });

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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 GetArray() { List li = new List(); for (int i = 0; i < 10; i++) li.Add(i + ""); return li; } using System.Web.Script.Services; [WebMethod] public static List GetArray() { List li = new List(); for (int i = 0; i < 10; i++) li.Add(i + ""); return li; }

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JQuery code :

///  $(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("" + this + "
"); }); alert(data.d); }, error: function(err) { alert(err); } }); //禁用按钮的提交 return false; }); }); ///  $(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("" + this + "
"); }); alert(data.d); }, error: function(err) { alert(err); } }); //禁用按钮的提交 return false; }); });

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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; }

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JQuery code:

///  $(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; }); }); ///  $(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; }); });

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Run result:

5. Operation xml
XMLtest.xml:

   1 qwe   2 asd      1 qwe   2 asd

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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("id:" + $(this).find("id").text() +"
"); $("#list").append("Name:"+ $(this).find("name").text() + "
"); }) }, 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("id:" + $(this).find("id").text() +"
"); $("#list").append("Name:"+ $(this).find("name").text() + "
"); }) }, 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; }); });

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[10.121.158.27:4002] Too many user code to run when -usercode_in_pthread is on

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