DataTable、Dataset转Json

DataTable、Dataset转Json

一、DataTable转Json

  public static string DataTableToJson1(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();
        }

二、Dataset转Json

      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();
        }

      public static string DataTableToJson2(DataTable dt)
        {
            StringBuilder Json = new StringBuilder();
            Json.Append("{\"" + dt.TableName + "\":[");
            if (dt.Rows.Count > 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    Json.Append("\r\n" + "{\"device\":" + "\r\n" + "{");
                    for (int j = 0; j < dt.Columns.Count; j++)
                    {
                        string columName = dt.Columns[j].ColumnName.ToString();
                        string columValue = dt.Rows[i][j].ToString();
                        if (j == 9)//"radios":{"wifiMAC":~~},
                            Json.Append("\"radios\":{\"" + columName + "\":\"" + columValue + "\"}");
                        else if (j == 10 || j == 11)//"partDetails":{"mainLogicBoardSerialNumber":~~, "batterySerialNumber":~~ }      
                        {
                            if (j == 10)
                                Json.Append("\"partDetails\":{\"" + columName + "\":\"" + columValue + "\"");
                            else
                                Json.Append("\"" + columName + "\":\"" + columValue + "\"}}");
                        }
                        else if (j == 12)
                            Json.Append("\"order\":{\"" + columName + "\":\"" + columValue + "\"");
                        else if (j == 16)
                            Json.Append("\"" + columName + "\":\"" + columValue + "\"}");
                        else
                            Json.Append("\"" + columName + "\":\"" + columValue + "\"");

                        if (j < dt.Columns.Count - 1 )
                            Json.Append(",");
                    }
                    Json.Append("}");
                    if (i < dt.Rows.Count - 1)
                    {
                        Json.Append(",");
                    }
                }
            }
            Json.Append("\r\n" + "]}");
            return Json.ToString();
        }