How to convert a dataset into Josn and output

  How to convert a dataset to Josn and output, this is a problem for many novice friends, and here's a good example to help you.

The code is as follows: public class jsonutil  {  public string Tojson (DataSet DataSet)   {  String jsonstring = "{"; &nb Sp foreach (DataTable table in dataset.tables)   {  jsonstring = "" "+ table. TableName + "": "+ tojson (table) +", "; }  jsonstring = Jsonstring.trimend (', ');  return jsonstring +"} " ; }  public string Tojson (DataTable dt)   {  StringBuilder jsonstring = new StringBuilder ();  Nstring.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 = String.Format (strvalue, type);    JS Onstring.append ("" "" + strvalue + "" ",");   }  jsonstring.append ("},");nbsp }  Jsonstring.remove (jsonstring.length-1, 1);  jsonstring.append ("]");  return jsonstring.tostring () ; } }    use   code as follows: Jsonutil ju = new Jsonutil ();  Response.Write (ju. Tojson (DS));    If there is a problem parsing, you can replace the "" "" "in the Code with" ""