asp.net如何将DataSet转换成josn并输出

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(); 
} 
}

 使用

jsonutil ju = new jsonutil(); 
response.write(ju.tojson(ds));

如果解析有问题可以把代码中的""""用"\""替换