C#中如何把Json数据转为DataTable

本篇内容介绍了"C#中如何把Json数据转为DataTable"的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！

简单

        /// 
        /// 将json转换为DataTable        /// 
        /// 得到的json        ///         public static DataTable JsonToDT(string strJson)        {            //转换json格式            strJson = strJson.Replace(",\"", "*\"").Replace("\":", "\"#").ToString();            //取出表名               var 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)                    {                        var dc = new DataColumn();                        string[] strCell = str.Split('#');                        if (strCell[0].Substring(0, 1) == "\"")                        {                            int a = strCell[0].Length;                            dc.ColumnName = strCell[0].Substring(1, a - 2);                        }                        else                        {                            dc.ColumnName = strCell[0];                        }                        tb.Columns.Add(dc);                    }                    tb.AcceptChanges();                }                //增加内容                   DataRow dr = tb.NewRow();                for (int r = 0; r < strRows.Length; r++)                {                    dr[r] = strRows[r].Split('#')[1].Trim().Replace("，", ",").Replace("：", ":").Replace("\"", "");                }                tb.Rows.Add(dr);                tb.AcceptChanges();            }            return tb;        }

处理不规则

        /// 
        /// Json 字符串 转换为 DataTable数据集合        /// 
        ///         ///         public static DataTable ToDataTable(string json)        {            DataTable dataTable = new DataTable();  //实例化            DataTable result;            try            {                dataTable.Columns.Add("id");                dataTable.Columns.Add("mac");                dataTable.Columns.Add("rssi");                dataTable.Columns.Add("ch");                dataTable.Columns.Add("ts");                dataTable.Columns.Add("tmc");                dataTable.Columns.Add("tc");                dataTable.Columns.Add("ds");                dataTable.Columns.Add("essid");                JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();                javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值                ArrayList arrayList = javaScriptSerializer.Deserialize(json);                if (arrayList.Count > 0)                {                    foreach (Dictionary dictionary in arrayList)                    {                        if (dictionary.Keys.Count() == 0)                        {                            result = dataTable;                            return result;                        }//Rows                        string root = "";                        foreach (string current in dictionary.Keys)                        {                            if (current != "data")                                root = current;                            else                            {                                ArrayList list = dictionary[current] as ArrayList;                                foreach (Dictionary dic in list)                                {                                    DataRow dataRow = dataTable.NewRow();                                    dataRow[root] = dictionary[root];                                    foreach (string key in dic.Keys)                                    {                                        dataRow[key] = dic[key];                                    }                                    dataTable.Rows.Add(dataRow);                                }                            }                        }                    }                }            }            catch            {            }            result = dataTable;            return result;        }

处理复杂

        /// 
        /// Json 字符串 转换为 DataTable数据集合        /// 
        ///         ///         public static DataTable ToDataTable(string json)        {            DataTable dataTable = new DataTable();  //实例化            DataTable result;            try            {                JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();                javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值                ArrayList arrayList = javaScriptSerializer.Deserialize(json);                if (arrayList.Count > 0)                {                    foreach (Dictionary dictionary in arrayList)                    {                        if (dictionary.Keys.Count() == 0)                        {                            result = dataTable;                            return result;                        }                        //Columns                        if (dataTable.Columns.Count == 0)                        {                            foreach (string current in dictionary.Keys)                            {                                if (current != "data")                                    dataTable.Columns.Add(current, dictionary[current].GetType());                                else                                {                                    ArrayList list = dictionary[current] as ArrayList;                                    foreach (Dictionary dic in list)                                    {                                        foreach (string key in dic.Keys)                                        {                                            dataTable.Columns.Add(key, dic[key].GetType());                                        }                                        break;                                    }                                }                            }                        }                        //Rows                        string root = "";                        foreach (string current in dictionary.Keys)                        {                            if (current != "data")                                root = current;                            else                            {                                ArrayList list = dictionary[current] as ArrayList;                                foreach (Dictionary dic in list)                                {                                    DataRow dataRow = dataTable.NewRow();                                    dataRow[root] = dictionary[root];                                    foreach (string key in dic.Keys)                                    {                                        dataRow[key] = dic[key];                                    }                                    dataTable.Rows.Add(dataRow);                                }                            }                        }                    }                }            }            catch            {            }            result = dataTable;            return result;        }

"C#中如何把Json数据转为DataTable"的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注网站，小编将为大家输出更多高质量的实用文章！