C#公共帮助类JsonHelper 操作帮助类
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四个主要操作类：JsonConverter 、JsonHelper 、JsonSplit 、AjaxResult
一、JsonConverter：
自定义查询对象转换动态类、object动态类转换json包、json转换object动态类、DataReader转换为Json、DataSet转换为Json、DataTable转成Json、Datatable转换为Json 、格式化字符型日期型布尔型、过滤特殊字符等
using System; using System.Collections.Generic; using System.Text; using System.Data; using System.Linq; using System.Web.Script.Serialization; using System.Collections; namespace Common { public class JsonConverter { /// <summary> /// 自定义查询对象转换动态类 /// add yuangang by 2015-05-19 /// </summary> /// <param name="obj"></param> /// <returns></returns> public static dynamic JsonClass(object obj) { return ConvertJson(Serialize(obj, true)); } /// <summary> /// object动态类转换json包 /// add yuangang by 2015-05-19 /// </summary> /// <param name="obj">对象</param> /// <param name="DateConvert">时间戳是否转换成日期类型</param> /// <returns></returns> public static string Serialize(object obj, bool DateConvert = false) { javascriptSerializer jss = new JavaScriptSerializer(); var str = jss.Serialize(obj); if (DateConvert) { str = System.Text.RegularExpressions.Regex.Replace(str, @"\\\\/Date\\((\\d+)\\)\\\\/", match => { DateTime dt = new DateTime(1970, 1, 1); dt = dt.AddMilliseconds(long.Parse(match.Groups[1].Value)); dt = dt.ToLocalTime(); return dt.ToString("yyyy-MM-dd HH:mm:ss"); }); } return str; } /// <summary> /// json转换object动态类 /// add yuangang by 2015-05-19 /// </summary> /// <param name="json"></param> /// <returns></returns> public static dynamic ConvertJson(string json) { JavaScriptSerializer jss = new JavaScriptSerializer(); jss.RegisterConverters(new JavaScriptConverter[] { new DynamicJsonConverter() }); dynamic dy = jss.Deserialize(json, typeof(object)) as dynamic; return dy; } /// <summary> /// DataReader转换为Json /// </summary> /// <param name="dataReader">DataReader对象</param> /// <returns>Json字符串</returns> public static string ToJson(IDataReader dataReader) { try { StringBuilder jsonString = new StringBuilder(); jsonString.Append("["); while (dataReader.Read()) { jsonString.Append("{"); for (int i = 0; i < dataReader.FieldCount; i++) { Type type = dataReader.GetFieldType(i); string strKey = dataReader.GetName(i); string strValue = dataReader[i].ToString(); jsonString.Append("\\"" + strKey + "\\":"); strValue = StringFormat(strValue, type); if (i < dataReader.FieldCount - 1) { jsonString.Append(strValue + ","); } else { jsonString.Append(strValue); } } jsonString.Append("},"); } if (!dataReader.IsClosed) { dataReader.Close(); } jsonString.Remove(jsonString.Length - 1, 1); jsonString.Append("]"); if (jsonString.Length == 1) { return "[]"; } return jsonString.ToString(); } catch (Exception ex) { throw ex; } } /// <summary> /// DataSet转换为Json /// add yuangang by 2015-05-19 /// </summary> /// <param name="dataSet">DataSet对象</param> /// <returns>Json字符串</returns> public static string ToJson(DataSet dataSet) { string jsonString = "{"; foreach (DataTable table in dataSet.Tables) { jsonString += "\\"" + table.TableName + "\\":" + ToJson(table) + ","; } jsonString = jsonString.TrimEnd(\',\'); return jsonString + "}"; } /// <summary> /// DataTable转成Json /// add yuangang by 2015-05-19 /// </summary> /// <param name="jsonName"></param> /// <param name="dt"></param> /// <returns></returns> public static string ToJson(DataTable dt, string jsonName) { StringBuilder Json = new StringBuilder(); if (string.IsNullOrEmpty(jsonName)) jsonName = dt.TableName; Json.Append("{\\"" + jsonName + "\\":["); if (dt.Rows.Count > 0) { for (int i = 0; i < dt.Rows.Count; i++) { Json.Append("{"); for (int j = 0; j < dt.Columns.Count; j++) { Type type = dt.Rows[i][j].GetType(); Json.Append("\\"" + dt.Columns[j].ColumnName.ToString() + "\\":" + StringFormat(dt.Rows[i][j] is DBNull ? string.Empty : dt.Rows[i][j].ToString(), type)); if (j < dt.Columns.Count - 1) { Json.Append(","); } } Json.Append("}"); if (i < dt.Rows.Count - 1) { Json.Append(","); } } } Json.Append("]}"); return Json.ToString(); } /// <summary> /// Datatable转换为Json /// add yuangang by 2015-05-19 /// </summary> /// <param name="table">Datatable对象</param> /// <returns>Json字符串</returns> public static string ToJson(DataTable dt) { StringBuilder jsonString = new StringBuilder(); jsonString.Append("["); DataRowCollection drc = dt.Rows; for (int i = 0; i < drc.Count; i++) { jsonString.Append("{"); for (int j = 0; j < dt.Columns.Count; j++) { string strKey = dt.Columns[j].ColumnName; string strValue = drc[i][j].ToString(); Type type = dt.Columns[j].DataType; jsonString.Append("\\"" + strKey + "\\":"); strValue = StringFormat(strValue, type); if (j < dt.Columns.Count - 1) { jsonString.Append(strValue + ","); } else { jsonString.Append(strValue); } } jsonString.Append("},"); } jsonString.Remove(jsonString.Length - 1, 1); jsonString.Append("]"); if (jsonString.Length == 1) { return "[]"; } return jsonString.ToString(); } /// <summary> /// 格式化字符型、日期型、布尔型 /// add yuangang by 2015-05-19 /// </summary> /// <param name="str"></param> /// <param name="type"></param> /// <returns></returns> private static string StringFormat(string str, Type type) { if (type != typeof(string) && string.IsNullOrEmpty(str)) { str = "\\"" + str + "\\""; } else if (type == typeof(string)) { str = String2Json(str); str = "\\"" + str + "\\""; } else if (type == typeof(DateTime)) { str = "\\"" + str + "\\""; } else if (type == typeof(bool)) { str = str.ToLower(); } else if (type == typeof(byte[])) { str = "\\"" + str + "\\""; } else if (type == typeof(Guid)) { str = "\\"" + str + "\\""; } return str; } /// <summary> /// 过滤特殊字符 /// add yuangang by 2015-05-19 /// </summary> /// <param name="s"></param> /// <returns></returns> public static string String2Json(String s) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < s.Length; i++) { char c = s.ToCharArray()[i]; switch (c) { case \'\\"\': sb.Append("\\\\\\""); break; case \'\\\\\': sb.Append("\\\\\\\\"); break; case \'/\': sb.Append("\\\\/"); break; case \'\\b\': sb.Append("\\\\b"); break; case \'\\f\': sb.Append("\\\\f"); break; case \'\\n\': sb.Append("\\\\n"); break; case \'\\r\': sb.Append("\\\\r"); break; case \'\\t\': sb.Append("\\\\t"); break; case \'\\v\': sb.Append("\\\\v"); break; case \'\\0\': sb.Append("\\\\0"); break; default: sb.Append(c); break; } } return sb.ToString(); } public static string GetDataGridJsonByDataSet(DataSet ds, string totalProperty, string root) { return GetDataGridJsonByDataTable(ds.Tables[0], totalProperty, root); } public static string GetDataGridJsonByDataTable(DataTable dt, string totalProperty, string root) { StringBuilder jsonBuilder = new StringBuilder(); jsonBuilder.Append("({\\"" + totalProperty + "\\":\\"" + dt.Rows.Count + "\\","); jsonBuilder.Append("\\""); jsonBuilder.Append(root); 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("]"); jsonBuilder.Append("})"); return jsonBuilder.ToString(); } public static string GetTreeJsonByDataSet(DataSet ds) { return GetTreeJsonByDataTable(ds.Tables[0]); } public static string GetTreeJsonByDataTable(DataTable dataTable) { DataTable dt = FormatDataTableForTree(dataTable); StringBuilder jsonBuilder = new StringBuilder(); jsonBuilder.Append("["); for (int i = 0; i < dt.Rows.Count; i++) { jsonBuilder.Append("{"); for (int j = 0; j < dt.Columns.Count; j++) { jsonBuilder.Append("\\\'"); if (dt.Columns[j].ColumnName == "leaf") { string leafValue = dt.Rows[i][j].ToString(); if (!string.IsNullOrEmpty(leafValue)) { jsonBuilder.Append(dt.Columns[j].ColumnName); jsonBuilder.Append("\\\':\\\'"); jsonBuilder.Append(dt.Rows[i][j].ToString()); jsonBuilder.Append("\\\',"); } else { jsonBuilder.Remove(jsonBuilder.Length - 1, 1); } } else if (dt.Columns[j].ColumnName == "customUrl") { jsonBuilder.Remove(jsonBuilder.Length - 1, 1); jsonBuilder.Append(dt.Columns[j].ColumnName); jsonBuilder.Append(":\\\'"); jsonBuilder.Append(dt.Rows[i][j].ToString()); jsonBuilder.Append("\\\',"); } else { 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("]"); return jsonBuilder.ToString(); } private static DataTable FormatDataTableForTree(DataTable dt) { DataTable dtTree = new DataTable(); dtTree.Columns.Add("id", typeof(string)); dtTree.Columns.Add("text", typeof(string)); dtTree.Columns.Add("leaf", typeof(string)); dtTree.Columns.Add("cls", typeof(string)); dtTree.Columns.Add("customUrl", typeof(string)); dtTree.AcceptChanges(); for (int i = 0; i < dt.Rows.Count; i++) { DataRow drTree = dtTree.NewRow(); drTree["id"] = dt.Rows[i]["id"].ToString(); drTree["text"] = dt.Rows[i]["text"].ToString(); if (dt.Rows[i]["leaf"].ToString() == "Y") { drTree["leaf"] = "true"; drTree["cls"] = "file"; } else { drTree["cls"] = "folder"; } drTree["customUrl"] = dt.Rows[i]["customUrl"].ToString(); dtTree.Rows.Add(drTree); } return dtTree; } } /// <summary> /// 动态JSON解析 /// add yuangang by 2015-05-19 /// </summary> public class DynamicJsonObject : System.Dynamic.DynamicObject { private IDictionary<string, object> Dictionary { get; set; } public DynamicJsonObject(IDictionary<string, object> dictionary) { this.Dictionary = dictionary; } public override bool TryGetMember(System.Dynamic.GetMemberBinder binder, out object result) { result = this.Dictionary[binder.Name]; if (result is IDictionary<string, object>) { result = new DynamicJsonObject(result as IDictionary<string, object>); } else if (result is ArrayList && (result as ArrayList) is IDictionary<string, object>) { result = new List<DynamicJsonObject>((result as ArrayList).ToArray().Select(x => new DynamicJsonObject(x as IDictionary<string, object>))); } else if (result is ArrayList) { result = new List<object>((result as ArrayList).ToArray()); } return this.Dictionary.ContainsKey(binder.Name); } } /// <summary> /// 动态JSON转换 /// add yuangang by 2015-05-19 /// </summary> public class DynamicJsonConverter : JavaScriptConverter { public override object Deserialize(IDictionary<string, object> dictionary, Type type, JavaScriptSerializer serializer) { if (dictionary == null) throw new ArgumentNullException("dictionary"); if (type == typeof(object)) { return new DynamicJsonObject(dictionary); } return null; } public override IDictionary<string, object> Serialize(object o以上是关于C#公共帮助类JsonHelper 操作帮助类的主要内容，如果未能解决你的问题，请参考以下文章