Get JSON string from datatable

        public static string GetJSONString(DataTable Dt)

        {

            string[] StrDc = new string[Dt.Columns.Count];

            string HeadStr = string.Empty;

            for (int i = 0; i < Dt.Columns.Count; i++)

            {

                StrDc[i] = Dt.Columns[i].Caption;

                HeadStr += "\"" + StrDc[i] + "\" : \"" + StrDc[i] + i.ToString() + "¾" + "\",";

            }

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

            StringBuilder Sb = new StringBuilder();

            Sb.Append("{\"" + Dt.TableName + "\" : [");

            for (int i = 0; i < Dt.Rows.Count; i++)

            {

                string TempStr = HeadStr;

                Sb.Append("{");

                for (int j = 0; j < Dt.Columns.Count; j++)

                {

                    TempStr = TempStr.Replace(Dt.Columns[j] + j.ToString() + "¾", Dt.Rows[i][j].ToString());

                }

                Sb.Append(TempStr + "},");

            }

            Sb = new StringBuilder(Sb.ToString().Substring(0, Sb.ToString().Length - 1));

            Sb.Append("]}");

            return Sb.ToString();

        }