using System;using System.Collections.Generic;using System.Data;using System.Linq;using System.Text;using System.Web;using System.Web.Script.Serialization;namespace WsDemo{    public class DataTableConvertJson    {        #region dataTable转换成Json格式        /// <summary>          /// dataTable转换成Json格式          /// </summary>          /// <param name="dt"></param>          /// <returns></returns>          public static string DataTable2Json(DataTable dt)        {            StringBuilder jsonBuilder = new StringBuilder();            jsonBuilder.Append("{\"");            jsonBuilder.Append(dt.TableName);            jsonBuilder.Append("\":[");            jsonBuilder.Append("[");            for (int i = 0; i < dt.Rows.Count; i++)            {                jsonBuilder.Append("{");                for (int j = 0; j < dt.Columns.Count; j++)                {                    jsonBuilder.Append("\"");                    jsonBuilder.Append(dt.Columns[j].ColumnName);                    jsonBuilder.Append("\":\"");                    jsonBuilder.Append(dt.Rows[i][j].ToString());                    jsonBuilder.Append("\",");                }                jsonBuilder.Remove(jsonBuilder.Length - 1, 1);                jsonBuilder.Append("},");            }            jsonBuilder.Remove(jsonBuilder.Length - 1, 1);            jsonBuilder.Append("]");            jsonBuilder.Append("}");            return jsonBuilder.ToString();        }        #endregion dataTable转换成Json格式        #region DataSet转换成Json格式        /// <summary>          /// DataSet转换成Json格式          /// </summary>          /// <param name="ds">DataSet</param>         /// <returns></returns>          public static string Dataset2Json(DataSet ds)        {            StringBuilder json = new StringBuilder();            foreach (DataTable dt in ds.Tables)            {                json.Append("{\"");                json.Append(dt.TableName);                json.Append("\":");                json.Append(DataTable2Json(dt));                json.Append("}");            } return json.ToString();        }        #endregion        /// <summary>        /// Msdn        /// </summary>        /// <param name="jsonName"></param>        /// <param name="dt"></param>        /// <returns></returns>        public static string DataTableToJson(string jsonName, DataTable dt)        {            StringBuilder Json = new StringBuilder();            Json.Append("{\"" + jsonName + "\":[");            if (dt.Rows.Count > 0)            {                for (int i = 0; i < dt.Rows.Count; i++)                {                    Json.Append("{");                    for (int j = 0; j < dt.Columns.Count; j++)                    {                        Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":\"" + dt.Rows[i][j].ToString() + "\"");                        if (j < dt.Columns.Count - 1)                        {                            Json.Append(",");                        }                    }                    Json.Append("}");                    if (i < dt.Rows.Count - 1)                    {                        Json.Append(",");                    }                }            }            Json.Append("]}");            return Json.ToString();        }        /// <summary>        /// 将datatable转换为json          /// </summary>        /// <param name="dtb">Dt</param>        /// <returns>JSON字符串</returns>        public static string Dtb2Json(DataTable dtb)        {            JavaScriptSerializer jss = new JavaScriptSerializer();            System.Collections.ArrayList dic = new System.Collections.ArrayList();            foreach (DataRow dr in dtb.Rows)            {                System.Collections.Generic.Dictionary<string, object> drow = new System.Collections.Generic.Dictionary<string, object>();                foreach (DataColumn dc in dtb.Columns)                {                    drow.Add(dc.ColumnName, dr[dc.ColumnName]);                }                dic.Add(drow);            }            //序列化              return jss.Serialize(dic);        }    }}