Implementation code for datasets, strings, DataTable, and objects in C # converted to JSON

C # objects, strings, dataTable, DataReader, datasets, object collections are converted to JSON string methods.

public class Convertjson {#region Private method///<summary>//filter special characters///</summary>//<param name= "s" ; string </param>//<returns>json string </returns> private static string String2json (string s) {Stringbui   Lder 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>//<para M name= "type" ></param>///<returns></returns> PrivAte static 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 to JSON//<summary>//List to JSON///</summary>//<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= "T1" ></typeparam>///< param name= "list" ></param>//<param name= "P" ></param>//<returns></returns> private static string listtojson<t> (ilist<t> list, string jsonname) {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///&LT;/SUmmary>//<param name= "Jsonobject" >json objects </param>///<returns>json strings </returns> Public   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.tostring ()) + "'";    } else if (ObjectValue is IEnumerable) {value = ToJson ((IEnumerable) objectValue);    } 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///</summary>//<param name= "Array" &G T; object collection </param>///<returns>json string </returns> public static string ToJson (IEnumerable array) {Stri   Ng 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///</summary>//<param name= "Arra Y "> Collection Object </param>//<returns>json string </returns> public static string toarraystring (IEnumerable ar   Ray) {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 T   Ojson (DataSet 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>//&LT;PA Ram Name= "table" >datatable objects </param>///<returns>json strings </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 ("]");  return jsonstring.tostring (); }///<summary>//DataTable converted to JSON///</summary> public static string ToJson (DataTable dt, String J   Sonname) {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>//&lt ;p Aram Name= "DataReader" >datareader objects </param>///<returns>json strings </returns> public static Stri   Ng ToJson (DbDataReader dataReader) {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 ("},");   } datareader.close ();   Jsonstring.remove (jsonstring.length-1, 1);   Jsonstring.append ("]");  return jsonstring.tostring (); } #endregion}