DataTable ,XML和JSON相互转化
网上搜集的,保留下来了,有需要的拿去!
private string DataTable2Xml(DataTable dt) { StringBuilder xmlBuilder = new StringBuilder(); xmlBuilder.Append("<?xml version=\"1.0\" encoding=\"utf-8\" ?>"); xmlBuilder.Append("<documentElement>"); xmlBuilder.Append("<" + dt.TableName + ">"); for (int i = 0; i < dt.Rows.Count; i++) { //xmlBuilder.Append("<" + dt.TableName + ">"); for (int j = 0; j < dt.Columns.Count; j++) { xmlBuilder.Append("<" + dt.Columns[j].ColumnName + ">"); xmlBuilder.Append(dt.Rows[i][j].ToString()); xmlBuilder.Append("</" + dt.Columns[j].ColumnName + ">"); } //xmlBuilder.Append("</" + dt.TableName + ">"); } xmlBuilder.Append("</" + dt.TableName + ">"); xmlBuilder.Append("</documentElement>"); return xmlBuilder.ToString(); } private string DataTable2Json(DataTable dt,bool withTableName) { StringBuilder jsonBuilder = new StringBuilder(); if (withTableName) { jsonBuilder.Append("{\""); jsonBuilder.Append(dt.TableName); jsonBuilder.Append("\":"); } jsonBuilder.Append("["); for (int i = 0; i < dt.Rows.Count; i++) { jsonBuilder.Append("{"); for (int j = 0; j < dt.Columns.Count; j++) { jsonBuilder.Append("\""); jsonBuilder.Append(dt.Columns[j].ColumnName); jsonBuilder.Append("\":\""); jsonBuilder.Append(dt.Rows[i][j].ToString()); jsonBuilder.Append("\","); } jsonBuilder.Remove(jsonBuilder.Length - 1, 1); jsonBuilder.Append("},"); } jsonBuilder.Remove(jsonBuilder.Length - 1, 1); jsonBuilder.Append("]"); if(withTableName)jsonBuilder.Append("}"); return jsonBuilder.ToString(); }
#region DataTable 转换为Json 字符串 /// <summary> /// DataTable 对象 转换为Json 字符串 /// </summary> /// <param name="dt"></param> /// <returns></returns> public static string ToJson(this DataTable dt) { JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer(); javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值 ArrayList arrayList = new ArrayList(); foreach (DataRow dataRow in dt.Rows) { Dictionary<string, object> dictionary = new Dictionary<string, object>(); //实例化一个参数集合 foreach (DataColumn dataColumn in dt.Columns) { dictionary.Add(dataColumn.ColumnName, dataRow[dataColumn.ColumnName].ToStr()); } arrayList.Add(dictionary); //ArrayList集合中添加键值 } return javaScriptSerializer.Serialize(arrayList); //返回一个json字符串 } #endregion #region Json 字符串 转换为 DataTable数据集合 /// <summary> /// Json 字符串 转换为 DataTable数据集合 /// </summary> /// <param name="json"></param> /// <returns></returns> public static DataTable ToDataTable(this 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; } if (dataTable.Columns.Count == 0) { foreach (string current in dictionary.Keys) { dataTable.Columns.Add(current, dictionary[current].GetType()); } } DataRow dataRow = dataTable.NewRow(); foreach (string current in dictionary.Keys) { dataRow[current] = dictionary[current]; } dataTable.Rows.Add(dataRow); //循环添加行到DataTable中 } } } catch { } result = dataTable; return result; } #endregion
/// <summary> /// 将json转换为DataTable /// </summary> /// <param name="strJson">得到的json</param> /// <returns></returns> private DataTable JsonToDataTable(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; }
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(); 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; }
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