Datasets, strings, DataTable, and objects in C # are converted to JSON

 <summary>///provide methods to convert other types to JSON//</summary> public static class Converttojson {#reg Ion Private Method///<summary>///filter special characters///</summary>//<param name= "S" > string <            /param>//<returns>json string </returns> private 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 DEFAULT:SB. Append (c);                Break }} return sb.        ToString (); }///<summary>//format character, date, Boolean///</summary>//<param name= "str" >< /param>//<param name= "type" ></param>///<returns></returns> Private St                Atic string StringFormat (String str, type type) {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 (String) && string.            IsNullOrEmpty (str)) {str = "\" "+ str +" \ ";        } return str; } #endregion #region List into JSON///<summary>//List to JSON//&LT;/SUMMARY&G        T <typeparam name= "T" ></typeparam>//<param name= "list" ></param>//<returns  ></returns> public static string listtojson<t> (Ilist<t> list) {Object obj =            LIST[0]; return listtojson<t> (list, obj. GetType ().        Name); }//<summary>//list converted to JSON///</summary>//<typeparam name= "T" ></        typeparam>//<param name= "list" ></param>///<param name= "Jsonname" ></param> <returns></returns> private static string listtojson<t> (ilist<t> list, string Json Name)       {StringBuilder Json = new StringBuilder (); if (string. IsNullOrEmpty (jsonname)) Jsonname = List[0]. GetType ().            Name;            Json.append ("{\" "+ Jsonname +" \ ": ["); if (list. Count > 0) {for (int i = 0; i < list. Count;                    i++) {T obj = activator.createinstance<t> (); propertyinfo[] pi = obj. GetType ().                    GetProperties ();                    Json.append ("{"); for (int j = 0; J < Pi. Length; J + +) {Type type = Pi[j]. GetValue (List[i], null).                        GetType (); Json.append ("\" "+ pi[j"). Name.tostring () + "\": "+ StringFormat (Pi[j]. GetValue (List[i], null).                        ToString (), type)); if (J < Pi.                        Length-1) {json.append (",");       }} json.append ("}");             if (I < list.                    Count-1) {json.append (",");            }}} json.append ("]}");        return json.tostring ();        Convert #endregion #region object to JSON///<summary>//object to JSON///</summary> <param name= "Jsonobject" >json objects </param>///<returns>json Strings </returns> Pub            Lic static string ToJson (object jsonobject) {string jsonstring = "{"; propertyinfo[] PropertyInfo = Jsonobject.gettype ().            GetProperties (); for (int i = 0; i < propertyinfo.length; i++) {Object objectValue = Propertyinfo[i]. Getgetmethod ().                Invoke (jsonobject, NULL); String value = String.                Empty;  if (ObjectValue is DateTime | | ObjectValue are GUID | | ObjectValue is TimeSpan) {value = "'" + objectvalUe.                ToString () + "'"; } else if (ObjectValue is string) {value = "'" + ToJson (objectvalue.tost                Ring ()) + "'"; } else if (ObjectValue is IEnumerable) {value = ToJson ((IEnumerable) obje                Ctvalue);                } else {value = ToJson (objectvalue.tostring ()); } jsonstring + = "\" + ToJson (propertyinfo[i).            Name) + "\": "+ Value +", ";            } jsonstring.remove (Jsonstring.length-1, jsonstring.length);        return jsonstring + "}"; Convert #endregion #region Object collection to JSON///<summary>//object collection to JSON//&LT;/SUMMARY&G        T <param name= "Array" > Object collection </param>//<returns>json string </returns> public static St     Ring ToJson (IEnumerable array) {string jsonstring = "{";       foreach (object item in array) {jsonstring + = ToJson (item) + ",";            } jsonstring.remove (Jsonstring.length-1, jsonstring.length);        return jsonstring + "]"; } #endregion #region Normal collection conversion JSON///<summary>//General collection conversion JSON//</summ          ary>//<param name= "Array" > Collection object </param>//<returns>json string </returns>            public static string toarraystring (IEnumerable array) {string jsonstring = "["; foreach (object item in array) {jsonstring = ToJson (item.            ToString ()) + ",";            } jsonstring.remove (Jsonstring.length-1, jsonstring.length);        return jsonstring + "]"; } #endregion #region DataSet to JSON///<summary>//DataSet to JSON// </summary>//<param name= "DataSet" >DataSet object </param>///<returns>json string </returns> public static string ToJson (Datase            T dataSet) {string jsonstring = "{"; foreach (DataTable table in dataset.tables) {jsonstring + = "\" + table.            TableName + "\": "+ ToJson (table) +", ";            } jsonstring = Jsonstring.trimend (', ');        return jsonstring + "}";             } #endregion convert #region DataTable to JSON///<summary>//DataTable to JSON </summary>//<param name= "DT" >datatable objects </param>//<returns>json String </returns> public static string ToJson (DataTable dt) {StringBuilder jsonstring = n            EW 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 ("]");        return jsonstring.tostring (); }///<summary>//DataTable converted to JSON///</summary> public static str ing 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].                        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 ();             } #endregion convert #region DataReader to JSON//<summary>//DataReader to JSON </summary>//<param name= "DataReader" >datareader objects </param>//<ret Urns>json string </returns> public static string ToJson (DbDataReader dataReader) {Stringbu            Ilder 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 ("},");            } datareader.close ();            Jsonstring.remove (jsonstring.length-1, 1);            Jsonstring.append ("]");        return jsonstring.tostring (); } #endregion}

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