string channelGroup=[{"SpType":"1","BaseInfoId":["xxx","xxx","xxx"]},{"SpType":"2","BaseInfoId":["xxx","xxx","xxx"]},{"SpType":"3","BaseInfoId":["xxx","xxx","xxx"]}]

需要先定义两个类

public struct ConfigCode {

　　public string SpType { get; set; }

　　public string[] BaseInfoId { get; set; }

}

public class JsonData {

　　public List<ConfigCode> ConfigCode;

}

 

 var tmp= Newtonsoft.Json.JsonConvert.DeserializeObject<List<ConfigCode>>(channelGroup);//处理json字符串，其中的类库需要自己添加引用Newtonsoft.Json.dll