//切换右上角 人次／人数时，需要调用此方法
public void BindCategoryList()
{
categoryEntityList = NewService.GetStudentCategoryList(CurrUserInfo.SchoolId).Where(p => p.DataType == dataType).ToList();
categoryList = new List <string>(categoryEntityList.Select(t => t.CategoryName).ToArray());
searchCagetory = categoryList[0];
tv_cagetory.Text = searchCagetory;
//重置查询弹框，否则adapter不会更新
popCategory = null;
}