net封装json

⑴ .net 如何把数据库里的数据写成json格式

先写成字符串，字符串格式为
var list=[{"xlid":"cxh","xldigitid":123456,"topscore":2000,"topplaytime":"2009-08-20"},{"xlid":"zd","xldigitid":123456,"topscore":1500,"topplaytime":"2009-11-20"}];
然后
var jsonList = eval(list);//对象化
jsonList即为json对象list