Json Datable Convert

 

把一个DataTable转换成JSON

abstract class JSONConverter

    {

        public JSONConverter()

        { }



        static public string GetJSONData(DataTable dtable)

        {

            StringBuilder JsonBuilder = new StringBuilder();

            StringBuilder content = new StringBuilder();



            foreach (DataRow dr in dtable.Rows)

            {

                content.Append("{").Append(GetRowData(dr)).Append("}, ");

            }



            if (content.Length > 0)

            {

                JsonBuilder.Append("{").AppendFormat("\"{0}\": ", dtable.TableName);



                if (content.ToString().Trim().EndsWith(","))

                {

                    JsonBuilder.AppendFormat("[ {0} ]", content.ToString().Substring(0, content.Length - 2)).Append("}");

                }

                else

                {

                    JsonBuilder.AppendFormat("[ {0} ]", content.ToString()).Append("}");

                }

            }

            return JsonBuilder.ToString();

        }



      static private string GetRowData(DataRow dr)

        {

            string sData = "";

            foreach (DataColumn col in dr.Table.Columns)

            {

                float val = 0;

                if ( float.TryParse(dr[col.ColumnName].ToString(), out val))

                {

                    sData = sData + "\"" + col.ColumnName + "\"" + ":" + val + ",";

                }

                else

                {

                    sData = sData + "\"" + col.ColumnName + "\"" + ":\"" + dr[col.ColumnName] + "\",";

                }

            }



            if (sData.EndsWith(","))

                sData = sData.Substring(0, sData.Length - 1);



            return sData;

        }



    }