asp.net how to convert a dataset to Josn and output _ practical tips

 public class Jsonutil {public string Tojson (DataSet DataSet) {string jsonstring 
= "{"; 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 (); 
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 = String.Format (strvalue, type); 

Jsonstring.append ("" "" + strvalue + "" ","); 
} jsonstring.append ("},"); 
} jsonstring.remove (jsonstring.length-1, 1); 
Jsonstring.append ("]"); 
return jsonstring.tostring (); } 
}

Use

Jsonutil ju = new Jsonutil (); 
Response.Write (Ju. Tojson (DS));

If parsing has problems, you can replace the "" "" "in the code with" \ "