DataTable转Json,Json转DataTable

// 页面加载时

    /// </summary>

    /// <param name="sender"></param>

    /// <param name="e"></param>

    protected void Page_Load(object sender, EventArgs e)

    {

        //判断是否异步请求

        if (Request.QueryString["ajax"] == "1")

        {

            ProcessRequest();

        }

    }

    /// <summary>

    /// 处理异步请求

    /// </summary>

    private void ProcessRequest()

    {

        Response.ContentType = "text/html";

        string json = Request.Form["json"];

        //反序列化DataTable

        DataTable newdtb = Json2Dtb(json);

        //序列化DataTable为JSON

        string back = Dtb2Json(newdtb);

        Response.Write(back);

        Response.End();

    }

    /// <summary>

    /// DataTable转Json

    /// </summary>

    /// <param name="dtb"></param>

    /// <returns></returns>

    private string Dtb2Json(DataTable dtb)

    {

        JavaScriptSerializer jss = new JavaScriptSerializer();

        ArrayList dic = new ArrayList();

        foreach (DataRow row in dtb.Rows)

        {

            Dictionary<string, object> drow = new Dictionary<string, object>();

            foreach (DataColumn col in dtb.Columns)

            {

                drow.Add(col.ColumnName, row[col.ColumnName]);

            }

            dic.Add(drow);

        }

        return jss.Serialize(dic);

    }

    /// <summary>

    /// Json转DataTable

    /// </summary>

    /// <param name="json"></param>

    /// <returns></returns>

    private DataTable Json2Dtb(string json)

    {

        JavaScriptSerializer jss = new JavaScriptSerializer();

        ArrayList dic = jss.Deserialize<ArrayList>(json);

        DataTable dtb = new DataTable();

        if (dic.Count > 0)

        {

            foreach (Dictionary<string, object> drow in dic)

            {

                if (dtb.Columns.Count == 0)

                {

                    foreach (string key in drow.Keys)

                    {

                        dtb.Columns.Add(key, drow[key].GetType());

                    }

                }

                DataRow row = dtb.NewRow();

                foreach (string key in drow.Keys)

                {

                    row[key] = drow[key];

                }

                dtb.Rows.Add(row);

            }

        }

        return dtb;

    }

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title></title>

    <script type="text/javascript" src="js/jquery-1.4.2.min.js"></script>

    <script type="text/javascript" src="js/json2.js"></script>

    <script type="text/javascript">

        //onload

        $(function() {

            //点击botton1

            $("#botton1").click(function() {

                var url = "default.aspx?ajax=1";

                var dtb = generateDtb();

                //序列化对象

                var postdata = JSON.stringify(dtb);

                //异步请求

                $.post(url, { json: postdata }, function(json) {

                    createTable(json);

                }, "json")

            });

        });

        //生成DataTable对象

        function generateDtb() {

            var dtb = new Array();

            for (var i = 0; i < 10; i  ) {

                var row = new Object();

                row.col1 = i;

                row.col2 = i % 2 == 0 ? true : false;

                row.col3 = i   "he\nll\"ow";

                dtb.push(row);

            }

            return dtb;

        }

        //显示Json中的数据

        function createTable(json) {

            var table = $("<table border='1'></table>");

            for (var i = 0; i < json.length; i  ) {

                o1 = json[i];

                var row = $("<tr></tr>");

                for (key in o1) {

                    var td = $("<td></td>");

                    td.text(o1[key].toString());

                    td.appendTo(row);

                }

                row.appendTo(table);

            }

            table.appendTo($("#back"));

        }

    </script>

</head>

<body>

    <form id="form1" runat="server">

    <div>

        <input id="botton1" type="button" value="button" />

        <div id="back">

        </div>

    </div>

    </form>

</body>

</html>
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DataTable转Json,Json转DataTable

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