C#中Where及Select使用

1.Wherh

   //获取接口
    var sjzxayyay = InvokeAPI_Sensor_Relation_GetAll();
   //筛选传的参id值与接口中id值相同的有几条
    sjzxayyay = sjzxayyay.Where(p => p.SensorId ==Convert.ToString(SensorId)).ToList();

2.Select，取出sjzxayyay中所有条数的MItemId

var mIdList = sjzxayyay.Select(p => p.MItemId).ToArray();