C# 中 Json 和 DataTable的转换方法

DataTable dt = null;
            dt = new DataTable();//实例化
            JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
            javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值
            ArrayList arrayList = javaScriptSerializer.Deserialize<ArrayList>(json);
            if (arrayList.Count > 0)
            {
                foreach (Dictionary<string, object> dictionary in arrayList)
                {
                    if (dictionary.Keys.Count<string>() == 0)
                    {
                        return dt;
                    }
                   
                        foreach (string current in dictionary.Keys)
                        {
                            if (dt.Columns.Contains(current))
                            {
                                continue;
                            }
                            dt.Columns.Add(current, dictionary[current].GetType());
                        }
                    

                    DataRow dataRow = dt.NewRow();
                    foreach (string current in dictionary.Keys)
                    {
                        dataRow[current] = dictionary[current];
                    }

                    dt.Rows.Add(dataRow); //循环添加行到DataTable中
                }
            }

            return dt;