JQuery의 $.ajax()를 사용하면 asp.net의 백그라운드 메소드를 쉽게 호출할 수 있습니다.
간단한 예를 들어 살펴보겠습니다.
1. 매개변수 없는 메서드 호출
C# 배경 코드:
using System.Web.Services; [WebMethod] public static string sayHi() { return "Hi,Welcome to China!"; }
참고: 1. 메서드는 정적 메서드여야 하며 [WebMethod 선언이 있어야 합니다. ] .
html 코드:
<div> <asp:Button ID="btnClick" runat="server" Text="click me" /> <br /> <span id="msg"></span> </div>
jQuery 코드:
<script type="text/javascript"> $(document).ready( function() { $("#btnClick").bind("click", function() { $.ajax({ type: "post", url: "ajaxHandler.aspx/sayHi", contentType: "application/json; charset=utf-8", dataType: "json", success: function(data) { $("#msg").css("color", "#0000FF").html(data.d); }, error: function(err) { $("#msg").css("color", "#FF0000").html("access faield:" + err); } }); return false; }); }); </script>
실행 결과:
firebug를 통해 json이 반환한 데이터 형식을 명확하게 확인할 수 있으므로 데이터를 가져올 때 data.d가 필요합니다.
2. 매개변수를 사용한 메소드 호출
C# 배경 코드:
[WebMethod] public static string sayHi(string address, string name) { return "Hi," + address + " " + name; }
html 코드:
<div> <asp:Button ID="btnClick" runat="server" Text="click me" /> address:<asp:TextBox ID="txtAddress" runat="server"></asp:TextBox> family name:<asp:TextBox ID="txtName" runat="server"></asp:TextBox> <br /> <span id="msg"></span> </div>
jQuery 코드:
<script type="text/javascript"> $(document).ready( function() { $("#btnClick").bind("click", function() { var add = $("#txtAddress").val(); var txtname = $("#txtName").val(); $.ajax({ type: "post", url: "ajaxHandler.aspx/sayHi", data: "{'address':'" + add + "','name':'" + txtname + "'}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(data) { $("#msg").css("color", "#0000FF").html(data.d); }, error: function(err) { $("#msg").css("color", "#FF0000").html("access faield:" + err); } }); return false; }); }); </script>
결과 실행
3. List 수집 메소드 호출을 반환합니다
C# 배경 코드:
[WebMethod] public static List<string> sayHi(string address, string name) { List<string> list = new List<string>(); for (int i = 0; i < 10; i++) { list.Add("Hi:" + i.ToString()); } list.Add("Hi:" + address + " " + name); return list; }
html 코드:
<div> <asp:Button ID="btnClick" runat="server" Text="click me" /> address:<asp:TextBox ID="txtAddress" runat="server"></asp:TextBox> family name:<asp:TextBox ID="txtName" runat="server"></asp:TextBox> <br /> <ul id="msg"> </ul> </div>
jQuery 코드:
<script type="text/javascript"> $(document).ready( function() { $("#btnClick").bind("click", function() { var add = $("#txtAddress").val(); var txtname = $("#txtName").val(); $.ajax({ type: "post", url: "ajaxHandler.aspx/sayHi", data: "{'address':'" + add + "','name':'" + txtname + "'}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(data) { $("#msg").html(""); $(data.d).each(function() { $("#msg").append("<li>" + this + "</li>"); }); $("#msg").css("color", "#0000FF"); }, error: function(err) { $("#msg").css("color", "#FF0000").html("access faield:" + err); } }); return false; }); }); </script>
실행 결과:
4. SortedList
[WebMethod] public static SortedList<string, string> sayHi(string address, string name) { SortedList<string, string> sl = new SortedList<string, string>(); for (int i = 0; i < 10; i++) { sl.Add(i.ToString() + "_key", i.ToString() + "_value"); } sl.Add("_key", "_value " + address + " " + name); return sl; }
<div> <asp:Button ID="btnClick" runat="server" Text="click me" /> address:<asp:TextBox ID="txtAddress" runat="server"></asp:TextBox> family name:<asp:TextBox ID="txtName" runat="server"></asp:TextBox> <br /> <ul id="msg"> </ul> </div>
<script type="text/javascript"> $(document).ready( function() { $("#btnClick").bind("click", function() { var add = $("#txtAddress").val(); var txtname = $("#txtName").val(); $.ajax({ type: "post", url: "ajaxHandler.aspx/sayHi", data: "{'address':'" + add + "','name':'" + txtname + "'}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(data) { $("#msg").html(""); //这里只取部分键、值显示 $("#msg").append("<li>" + data.d["0_key"] + "</li>"); $("#msg").append("<li>" + data.d["1_key"] + "</li>"); $("#msg").append("<li>" + data.d["2_key"] + "</li>"); $("#msg").append("<li>" + data.d["_key"] + "</li>"); $("#msg").css("color", "#0000FF"); }, error: function(err) { $("#msg").css("color", "#FF0000").html("access faield:" + err); } }); return false; }); }); </script>
<?xml version="1.0" encoding="utf-8" ?> <books> <book> <name>ASP.NET 3.5高级程序设计(第2版)</name> <author>麦克唐纳博思工作室</author> <wordCount>2034000</wordCount> <price>76</price> </book> <book> <name>ASP.NET 3.5入门经典</name> <author>(荷兰)史潘加斯(Spaanjaars,I.)</author> <wordCount>1046000</wordCount> <price>78.5</price> </book> <book> <name>C#高级编程(第5版)上下卷</name> <author>(美)内格尔(Nagel.C) 等著</author> <wordCount>24770000</wordCount> <price>124</price> </book> <book> <name>ASP.NET AJAX实战</name> <author>(美)麦克卢尔,(美)格拉维奇,(美)欧尔 等著</author> <wordCount>511000</wordCount> <price>44</price> </book> <book> <name>ASP.NET程序开发范例宝典(C#)(第2版)</name> <author>张跃延,苏宇,贯伟红</author> <wordCount>1419000</wordCount> <price>71.2</price> </book> </books>
<div> <asp:Button ID="btnClick" runat="server" Text="click me" /> address:<asp:TextBox ID="txtAddress" runat="server"></asp:TextBox> family name:<asp:TextBox ID="txtName" runat="server"></asp:TextBox> <br /> <ul id="msg"> </ul> </div>
<script type="text/javascript"> $(document).ready( function() { $("#btnClick").bind("click", function() { $.ajax({ url: "books.xml", dataType: "xml", success: function(xmlData) { $("#msg").html(""); $(xmlData).find("books>book").each(function() { $("#msg").append("====new book===="); $("#msg").append("<li>name:" + $(this).find("name").text() + "</li>"); $("#msg").append("<li>author:" + $(this).find("author").text() + "</li>"); $("#msg").append("<li>wordCount:" + $(this).find("wordCount").text() + "</li>"); $("#msg").append("<li>price:" + $(this).find("price").text() + "</li>"); }); $("#msg").css("color", "#0000FF"); }, error: function(err) { $("#msg").css("color", "#FF0000").html("access faield:" + err); } }); return false; }); }); </script>