C#中如何把Json数据转为DataTable
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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
/// <summary> /// 将json转换为DataTable /// </summary> /// <param name="strJson">得到的json</param> /// <returns></returns> 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
/// <summary> /// Json 字符串 转换为 DataTable数据集合 /// </summary> /// <param name="json"></param> /// <returns></returns> 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<ArrayList>(json); if (arrayList.Count > 0) { foreach (Dictionary<string, object> dictionary in arrayList) { if (dictionary.Keys.Count<string>() == 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<string, object> 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
/// <summary> /// Json 字符串 转换为 DataTable数据集合 /// </summary> /// <param name="json"></param> /// <returns></returns> 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<ArrayList>(json); if (arrayList.Count > 0) { foreach (Dictionary<string, object> dictionary in arrayList) { if (dictionary.Keys.Count<string>() == 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<string, object> 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<string, object> 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编程网网站，小编将为大家输出更多高质量的实用文章！
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