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  • 实例数据ajax无刷新的三级联动

    本篇文章笔者在上海游玩的时候突然想到的...之前就有想写几篇关于实例数据的笔记,所以回家到之后就奋笔疾书的写出来发表了

        <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title></title>
        <script src="Jquery1.7.js" type="text/javascript"></script>
        <script type="text/javascript">
            $(function () {
                $.ajax({
                    type: "post",
                    contentType: "application/json",
                    url: "WebService1.asmx/loadprovince",
                    data: "{}",
                    success: function (result) {
                        var ping;
                        for (var i = 0; i < result.d.length; i++) {
                            ping += "<option value=" + result.d[i].provinceID + ">";
                            ping += result.d[i].provincename;
                            ping += "</option>";

                        }
                        $('#Select1').append(ping);

        
                    }

        
                })
                $('#Select1').change(function () {
                    //第二次选时要记得清空市和县中的内容
                    $('#Select2 option:gt(0)').remove();
                    $('#Select3 option:gt(0)').remove();
                    //在省的改变事件里绑定下一个下来列表(要失掉省的id)

                    $.ajax({
                        type: "post",
                        contentType: "application/json",
                        url: "WebService1.asmx/loadcity",
                        data: "{fatherid:'" + $('#Select1 option:selected').val() + "'}",
                        success: function (result) {
                            var str2;
                            for (var i = 0; i < result.d.length; i++) {
                                str2 += "<option value=" + result.d[i].cityID + ">";
                                str2 += result.d[i].cityname;
                                str2 += "</option>";
                            }

                            $('#Select2').append(str2);
                        }
                    })
                })
                $('#Select2').change(function () {
                    $('#Select3 option:gt(0)').remove();

                    $.ajax({
                        type: "post",
                        contentType: "application/json",
                        url: "WebService1.asmx/loadarea",
                        data: "{fatherid:'" + $('#Select2 option:selected').val() + "'}",
                        success: function (result) {
                            var str3;
                            for (var i = 0; i < result.d.length; i++) {
                                str3 += "<option value=" + result.d.areaID + ">";
                                str3 += result.d[i].areaname;
                                str3 += result.d[i].father;
                              
                            }
                            $('#Select3').append(str3);
                        }
                    })
                })
            })
       
        </script>
    </head>
    <body>
       省:
        <select id="Select1">
            <option>--请选择--</option>
        </select>
        市:
        <select id="Select2">
            <option>--请选择--</option>
        </select>
        县:
        <select id="Select3">
            <option>--请选择--</option>
        </select>
    </body>
    </html>

        每日一道理
    成功的花朵开放在啊勤劳的枝头,失败的苦果孕育在懒惰的温床之中。

        webservice:

     [WebMethod]//加载省
            public List<Model.province> loadprovince()//为什么要用list因为这里出从前的值不可能一个实例是多个model实例,一个实例就是一条记载这样做防止字段错误
            {
                BLL.province bp = new BLL.province();
                List<Model.province> list=bp.getlistModel();
                return list;
            }
            [WebMethod]//加载市
            public List<Model.city> loadcity(string fatherid)
            {
                BLL.city bc = new BLL.city();
                List<Model.city> list = bc.getlistmodel(fatherid);
                return list;
            }
            [WebMethod]//加载县
            public List<Model.area> loadarea(string fatherid)
            {
                BLL.area ba = new BLL.area();
                List<Model.area> list = ba.getlistmodel(fatherid);
                return list;
               
            }
        }
    }

        DAL--area

     public System.Collections.Generic.List<Model.area> getlistmodel(string fatherid)
            {
                System.Collections.Generic.List<Model.area> list = new System.Collections.Generic.List<Model.area>();
                DataTable dt = GetList("father=" + fatherid + "").Tables[0];
                foreach (DataRow row in dt.Rows)
                {
                    Model.area ma = new Model.area();
                    ma.areaID = row["areaID"].ToString();
                    ma.areaname = row["areaname"].ToString();
                    ma.father = row["father"].ToString();
                    list.Add(ma);
                }
                return list;
            }

        Dal--city

     public System.Collections.Generic.List<Model.area> getlistmodel(string fatherid)
            {
                System.Collections.Generic.List<Model.area> list = new System.Collections.Generic.List<Model.area>();
                DataTable dt = GetList("father=" + fatherid + "").Tables[0];
                foreach (DataRow row in dt.Rows)
                {
                    Model.area ma = new Model.area();
                    ma.areaID = row["areaID"].ToString();
                    ma.areaname = row["areaname"].ToString();
                    ma.father = row["father"].ToString();
                    list.Add(ma);
                }
                return list;
            }
        }

        DAL-provience

     public System.Collections.Generic.List<Model.province> getlistModel()
            {
                //将要查的内容以实例的方式返回
                //这里要做的就是要建立list并将list用model实例填满,而model要用一个方法失掉数据并添加到model中
              //建list实例
                System.Collections.Generic.List<Model.province> list = new System.Collections.Generic.List<Model.province>();
                //已经有了的失掉数据的方法就不用自己写了通过调用Getlist的方法操纵数据库拿到数据
                DataTable dt = GetList("").Tables[0];
                //拿到数据后就需要将数据添加到model实例中了
               
                foreach (DataRow row in dt.Rows)
                {
                    //每一行都是个实例所以要将model的放在循环里面
                    Model.province mp = new Model.province();
                    mp.provinceID = row["provinceID"].ToString();
                    mp.provincename = row["provincename"].ToString();
                    list.Add(mp);//没添加完一个实例都要放到list中
                }
                return list;

      
            }

    文章结束给大家分享下程序员的一些笑话语录: 一个合格的程序员是不会写出 诸如 “摧毁地球” 这样的程序的,他们会写一个函数叫 “摧毁行星”而把地球当一个参数传进去。

    --------------------------------- 原创文章 By 实例和数据 ---------------------------------

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  • 原文地址:https://www.cnblogs.com/jiangu66/p/3095805.html
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