• 利用JQuery的$.ajax()可以很方便的调用asp.net的后台方法


    先来个简单的实例热热身吧。

    1、无参数的方法调用

    asp.net code:

    view plaincopy to clipboardprint?
    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!";
    }

    注意:1.方法一定要静态方法,而且要有[WebMethod]的声明

    JQuery code:

    view plaincopy to clipboardprint?
    /// <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;
        });
    });

    结果:

    2、带参数的方法调用

    asp.net code:

    view plaincopy to clipboardprint?
    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:

    view plaincopy to clipboardprint?
    /// <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;
        });
    });

    运行结果:

    下面进入高级应用罗

    3、返回数组方法的调用

    asp.net code:

    view plaincopy to clipboardprint?
    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:

    view plaincopy to clipboardprint?
    /// <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;
        });
    });

    运行结果:

    4、返回Hashtable方法的调用

    asp.net code:

    view plaincopy to clipboardprint?
    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:

    view plaincopy to clipboardprint?
    /// <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;
        });
    });

    运行结果:

    5、操作xml

    XMLtest.xml:

    view plaincopy to clipboardprint?
    <?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:

    view plaincopy to clipboardprint?
    $(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;  
        });  
    });
    $(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;
        });
    });

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  • 原文地址:https://www.cnblogs.com/zzdxpq/p/2377382.html
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