Jquery 相关技术累积

Jquery 文章积累

转自：http://www.cnblogs.com/yangtongnet/archive/2010/05/20/1740200.html

　　博主用JQuery+XML、JQuery+JSON两种方式列出了，处理后台数据的方法。很好，收藏了！

【Jquery + Xml】
      如下代码是我查询IPInfo表中前10条数据，并以XML格式输出：
代码
public void XmlToAjax()
{
   DataTable dt = SQLHelper.ExecuteDataTable(SQLHelper.conStrings, CommandType.Text, "select top(10) * from IPInfo");
   DataSet ds = new DataSet();
   ds.Tables.Add(dt);
   //Console
   Response.ContentType = "text/xml";
   Response.Charset = "UTF-8";
   Response.Clear();
   Response.Write("<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n " + ds.GetXml());
   Response.End();
}

     我在前台接收到数据后进行如下处理：
代码
function checkText() {
            var xmlT;
            if ($.trim($("#txtID").val()) == "") {
                $("#sm").text("请输入XML条件");
                $("#txtID").focus();
                return false;
            }
            else {
                $("#sm").text("");
                $.ajax({
                    type: "GET", 
                  //contentType: "application/json", //WebService 会返回Json类型
                    url: "../Ajax/Ajax1.aspx",
                    dataType: "xml",
                    data: "",  //这里是要传递的参数，格式为 data: "{paraName:paraValue}",下面将会看到      
                    success: function(result) {     //回调函数，result，返回值
                        var ID = '';
                        $(result).find("Table1").each(function() {
                            ID += $(this).children("IPid").text() + "<br>";
                        });
                        $("#divMsg").html(ID);
                    }
                });
            }

        }

     下面是输出结果：
     result.xml 的结果集为：

代码
result.xml
"<?xml version="1.0"?>
<NewDataSet>
    <Table1>
        <IPid>1</IPid>
        <IPFrom>0.0.0.0        </IPFrom>
        <IPTo>0.255.255.255  </IPTo>
        <IPLocation>IANA  CZ88.NET</IPLocation>
        <IPToNumber>16777215</IPToNumber>
        <IPFromNumber>0</IPFromNumber>
    </Table1>
    <Table1>
        <IPid>2</IPid>
        <IPFrom>1.0.0.0        </IPFrom>
        <IPTo>1.255.255.255  </IPTo>
        <IPLocation>IANA  CZ88.NET</IPLocation>
        <IPToNumber>33554431</IPToNumber>
        <IPFromNumber>16777216</IPFromNumber>
    </Table1>
    <Table1>
        <IPid>3</IPid>
        <IPFrom>2.0.0.0        </IPFrom>
        <IPTo>2.255.255.255  </IPTo>
        <IPLocation>IANA  CZ88.NET</IPLocation>
        <IPToNumber>50331647</IPToNumber>
        <IPFromNumber>33554432</IPFromNumber>
    </Table1>
    <Table1>
        <IPid>4</IPid>
        <IPFrom>3.0.0.0        </IPFrom>
        <IPTo>3.255.255.255  </IPTo>
        <IPLocation>美国 新泽西通用电气公司</IPLocation>
        <IPToNumber>67108863</IPToNumber>
        <IPFromNumber>50331648</IPFromNumber>
    </Table1>
    <Table1>
        <IPid>5</IPid>
        <IPFrom>4.0.0.0        </IPFrom>
        <IPTo>4.9.255.255    </IPTo>
        <IPLocation>美国  CZ88.NET</IPLocation>
        <IPToNumber>67764223</IPToNumber>
        <IPFromNumber>67108864</IPFromNumber>
    </Table1>
    <Table1>
        <IPid>6</IPid>
        <IPFrom>4.10.0.0       </IPFrom>
        <IPTo>4.10.255.255   </IPTo>
        <IPLocation>美国 新泽西州立大学</IPLocation>
        <IPToNumber>67829759</IPToNumber>
        <IPFromNumber>67764224</IPFromNumber>
    </Table1>
    <Table1>
        <IPid>7</IPid>
        <IPFrom>4.11.0.0       </IPFrom>
        <IPTo>4.11.255.255   </IPTo>
        <IPLocation>美国 夏威夷</IPLocation>
        <IPToNumber>67895295</IPToNumber>
        <IPFromNumber>67829760</IPFromNumber>
    </Table1>
    <Table1>
        <IPid>8</IPid>
        <IPFrom>4.12.0.0       </IPFrom>
        <IPTo>4.19.77.255    </IPTo>
        <IPLocation>美国  CZ88.NET</IPLocation>
        <IPToNumber>68374015</IPToNumber>
        <IPFromNumber>67895296</IPFromNumber>
    </Table1>
    <Table1>
        <IPid>9</IPid>
        <IPFrom>4.19.78.0      </IPFrom>
        <IPTo>4.19.78.255    </IPTo>
        <IPLocation>美国 西南政法大学</IPLocation>
        <IPToNumber>68374271</IPToNumber>
        <IPFromNumber>68374016</IPFromNumber>
    </Table1>
    <Table1>
        <IPid>10</IPid>
        <IPFrom>4.19.79.0      </IPFrom>
        <IPTo>4.19.79.63     </IPTo>
        <IPLocation>美国 Armed Forces Radio/Television</IPLocation>
        <IPToNumber>68374335</IPToNumber>
        <IPFromNumber>68374272</IPFromNumber>
    </Table1>
</NewDataSet>
"

    看到这一串代码，那我接下来面对的问题就是去分析这一串代码，取出我所需要的数据，以前一直都是这样处理的（），就像这一段代码：
    $(result).find("Table1").each(function() {    ID += $(this).children("IPid").text() + "<br>"; });  是要取出XML中的所有IPid的数据。
     （顺便插入一句：因为用Jquery操作XML，所以代码相对比较简洁，如果用JS的话会较之麻烦一些。）
    那我们接下来再看看Jquery是如何处理Json格式的数据的：
   【Jquery + Json】
    在处理之前，首先我们要做一件事，就是将数据库取出的数据转换成Json格式，可能已存在有多种转换方法，这里呢我就先说下自己的Json转换方法：
    首先创建一个JsonHelper的类如下：
代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Web;
using System.Runtime.Serialization.Json;

namespace LinqModel
{
    public static class JsonHelper
    {
        /// <summary>
        /// 格式化成Json字符串
        /// </summary>
        /// <param name="obj">需要格式化的对象</param>
        /// <returns>Json字符串</returns>
        public static string ToJson(this object obj)
        {
            // 首先，当然是JSON序列化
            DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());

            // 定义一个stream用来存发序列化之后的内容
            Stream stream = new MemoryStream();
            serializer.WriteObject(stream, obj);

            // 从头到尾将stream读取成一个字符串形式的数据，并且返回
            stream.Position = 0;
            StreamReader streamReader = new StreamReader(stream);
            return streamReader.ReadToEnd();
        }
    }
}

当然这里我们需要引用两个DLL文件（System.Runtime.Serialization.Json，System.ServiceModel.Web），当然这里直接添加添加.net引用，找到这两个DLL就OK了，然后我们需要创建一个实体类，以便用泛型操作，代码如下：

代码
/// <summary>
    /// 实体类IPInfo 。(属性说明自动提取数据库字段的描述信息)
    /// </summary>
    [DataContract]
    public class IPInfo
    {
        public IPInfo()
        { }
        #region Model
        private long _ipid;
        private string _ipfrom;
        private string _ipto;
        private string _iplocation;
        private string _ipcity;
        private string _iptonumber;
        private string _ipfromnumber;
        /// <summary>
        /// Key
        /// </summary>
        [DataMember]
        public long IPid
        {
            set { _ipid = value; }
            get { return _ipid; }
        }
        /// <summary>
        /// 区间开始
        /// </summary>
        [DataMember]
        public string IPFrom
        {
            set { _ipfrom = value; }
            get { return _ipfrom; }
        }
        /// <summary>
        /// 区间结束
        /// </summary>
        [DataMember]
        public string IPTo
        {
            set { _ipto = value; }
            get { return _ipto; }
        }
        /// <summary>
        /// 位置
        /// </summary>
        [DataMember]
        public string IPLocation
        {
            set { _iplocation = value; }
            get { return _iplocation; }
        }
        /// <summary>
        /// 城市
        /// </summary>
        [DataMember]
        public string IPCity
        {
            set { _ipcity = value; }
            get { return _ipcity; }
        }
        /// <summary>
        ///
        /// </summary>
        [DataMember]
        public string IPToNumber
        {
            set { _iptonumber = value; }
            get { return _iptonumber; }
        }
        /// <summary>
        ///
        /// </summary>
        [DataMember]
        public string IPFromNumber
        {
            set { _ipfromnumber = value; }
            get { return _ipfromnumber; }
        }
        #endregion Model

    }

注意：如果要对该类进行序列化，一定要在类前面添加上“[DataContract]”，在属性前面添加上“[DataMember]”，这样才能被“DataContractJsonSerializer”序列化成JSON。
下面我们来看如何调用这个方法转换成Json格式的数据：
代码
public void JsonToAjax()
        {
            using (SqlDataReader reader = SQLHelper.ExecuteReader(SQLHelper.conStrings, CommandType.Text, "select top(10) * from IPInfo"))
            {
                List<LinqModel.IPInfo> list = new List<LinqModel.IPInfo>();
                while (reader.Read())
                {
                    LinqModel.IPInfo model = new LinqModel.IPInfo();
                    model.IPCity = reader["IPCity"].ToString();
                    model.IPFrom = reader["IPFrom"].ToString();
                    model.IPFromNumber = reader["IPFromNumber"].ToString();
                    model.IPid = long.Parse(reader["IPid"].ToString());
                    model.IPLocation = reader["IPLocation"].ToString();
                    model.IPTo = reader["IPTo"].ToString();
                    model.IPToNumber = reader["IPToNumber"].ToString();
                    list.Add(model);
                }
                //list.ToJson();
                Response.Write(list.ToJson());
                Response.End();
            }

        }


就是如此调用：list.ToJson()，简单吧，下面看一下输出的结果：

代码
[{"IPCity":"","IPFrom":"0.0.0.0 ","IPFromNumber":"0","IPLocation":"IANA CZ88.NET","IPTo":"0.255.255.255 ","IPToNumber":"16777215","IPid":1},{"IPCity":"","IPFrom":"1.0.0.0 ","IPFromNumber":"16777216","IPLocation":"IANA CZ88.NET","IPTo":"1.255.255.255 ","IPToNumber":"33554431","IPid":2},{"IPCity":"","IPFrom":"2.0.0.0 ","IPFromNumber":"33554432","IPLocation":"IANA CZ88.NET","IPTo":"2.255.255.255 ","IPToNumber":"50331647","IPid":3},{"IPCity":"","IPFrom":"3.0.0.0 ","IPFromNumber":"50331648","IPLocation":"美国 新泽西通用电气公司","IPTo":"3.255.255.255 ","IPToNumber":"67108863","IPid":4},{"IPCity":"","IPFrom":"4.0.0.0 ","IPFromNumber":"67108864","IPLocation":"美国 CZ88.NET","IPTo":"4.9.255.255 ","IPToNumber":"67764223","IPid":5},{"IPCity":"","IPFrom":"4.10.0.0 ","IPFromNumber":"67764224","IPLocation":"美国 新泽西州立大学","IPTo":"4.10.255.255 ","IPToNumber":"67829759","IPid":6},{"IPCity":"","IPFrom":"4.11.0.0 ","IPFromNumber":"67829760","IPLocation":"美国 夏威夷","IPTo":"4.11.255.255 ","IPToNumber":"67895295","IPid":7},{"IPCity":"","IPFrom":"4.12.0.0 ","IPFromNumber":"67895296","IPLocation":"美国 CZ88.NET","IPTo":"4.19.77.255 ","IPToNumber":"68374015","IPid":8},{"IPCity":"","IPFrom":"4.19.78.0 ","IPFromNumber":"68374016","IPLocation":"美国 西南政法大学","IPTo":"4.19.78.255 ","IPToNumber":"68374271","IPid":9},{"IPCity":"","IPFrom":"4.19.79.0 ","IPFromNumber":"68374272","IPLocation":"美国 Armed Forces Radio\/Television","IPTo":"4.19.79.63 ","IPToNumber":"68374335","IPid":10}]

标准的Json格式，呵呵，看了上面的代码，是不是很方便，我想下面的操作就更简单了，看下面的Jquery代码：

代码
function checkText1() {
            var xmlT;
            if ($.trim($("#txtID1").val()) == "") {
                $("#sm1").text("请输入Json条件");
                $("#txtID1").focus();
                return false;
            }
            else {
                $("#sm1").text("");
                $.ajax({
                    type: "GET",   //访问WebService使用Post方式请求
                    contentType: "application/json", //WebService 会返回Json类型
                    url: "../Ajax/Ajax1.aspx", //调用WebService的地址和方法名称组合---WsURL/方法名
                    dataType: "json",
                    data: "",  //这里是要传递的参数，格式为 data: "{paraName:paraValue}",下面将会看到      
                    success: function(result) {     //回调函数，result，返回值
                        var aa = '';
                        aa += result[1]["IPid"] + "<br>";
                        aa += result[1]["IPFrom"] + "<br>";
                        aa += result[1]["IPTo"] + "<br>";
                        aa += result[1]["IPLocation"] + "<br>";
                        aa += result[1]["IPCity"] + "<br>";
                        aa += result[1]["IPToNumber"] + "<br>";
                        aa += result[1]["IPFromNumber"] + "<br>";
                        $("#divMsg").html(aa);
                    }
                });
            }

我们再来看一下 result的结果集：
result
{...}
    [0]: {...}
    [1]: {...}
    [2]: {...}
    [3]: {...}
    [4]: {...}
    [5]: {...}
    [6]: {...}
    [7]: {...}
    [8]: {...}
    [9]: {...}
result[0]
{...}
    IPCity: ""
    IPFrom: "0.0.0.0        "
    IPFromNumber: "0"
    IPid: 1
    IPLocation: "IANA  CZ88.NET"
    IPTo: "0.255.255.255  "
    IPToNumber: "16777215"
就像操作一个泛型一样简单，便捷。
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                                                                    mc