C# DataTable 转换成JSON数据

原文:C# DataTable 转换成JSON数据

 

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);

        }

    }

}