asp.net json和Datatable格式的相互转化

1.  #region 将datatable格式转换成 json格式
           public static string DataSetToJson(DataTable dt)
           {
               string json = string.Empty;
               try
               {
                   if (dt == null || dt.Rows.Count == 0)
                   {
                       return "";
                   }
                   json = "{";
                   json += "'table" + 1 + "':[";
                   for (int i = 0; i < dt.Rows.Count; i++)
                   {
                       json += "{";
                       for (int j = 0; j < dt.Columns.Count; j++)
                       {
                           json += "'" + dt.Columns[j].ColumnName + "':'" + dt.Rows[i][j].ToString() + "'";
                           if (j != dt.Columns.Count - 1)
                           {
                               json += ",";
                           }
                       }
                       json += "}";
                       if (i != dt.Rows.Count - 1)
                       {
                           json += ",";
                       }
                   }
                   json += "]";
                   json += "}";
               }
               catch (Exception ex)
               {
   
                   throw new Exception(ex.Message);
               }
               return json;
           }
           #endregion
   

2.   #region 将json格式解析成datatable格式
           public static DataTable JsonToDataTable(string strJson)
           {
   
               //取出表名  
               Regex rg = new Regex(@"(?<={)[^:]+(?=:/\[)", RegexOptions.IgnoreCase);
               string strName = rg.Match(strJson).Value;
               DataTable tb = null;
               //去除表名  
               strJson = strJson.Substring(strJson.IndexOf("[") + 1);
               strJson = strJson.Substring(0, strJson.IndexOf("]"));
   
               //获取数据  
               rg = new Regex(@"(?<={)[^}]+(?=})");
               MatchCollection mc = rg.Matches(strJson);
               for (int i = 0; i < mc.Count; i++)
               {
                   string strRow = mc[i].Value;
                   string[] strRows = strRow.Split(',');
   
                   //创建表  
                   if (tb == null)
                   {
                       tb = new DataTable();
                       tb.TableName = strName;
                       foreach (string str in strRows)
                       {
                           DataColumn dc = new DataColumn();
   
                           string[] strCell = str.Split(':');
                           dc.ColumnName = strCell[0].ToString().Trim().Replace("'", "");
                           // row[dc.ColumnName] = strCell[1].ToString();
                           tb.Columns.Add(dc);
                           // t .Columns[strCell[0].ToString()].te
                       }
   
                       tb.AcceptChanges();
                   }
                   DataRow row = tb.NewRow();
   
                   foreach (var item in strRows)
                   {
                       string[] strCell1 = item.Split(':');
                       string lie = strCell1[0].ToString().Trim().Replace("'", "");
                       string zhi = strCell1[1].ToString().Trim().Replace("'", "");
                       // row[strCell1[0].ToString()] = strCell1[1].ToString();
                       row[lie] = zhi;
                   }
                   tb.Rows.Add(row);
                   // t .Columns[strCell[0].ToString()].te
               }
               tb.AcceptChanges();
               return tb;
           }
           #endregion