dhl:C# KeyValuePair 的基本用法及结合泛型的用法

C# KeyValuePair<TKey,TValue>的用法。结构体，定义可设置或检索的键/值对。也就是说我们可以通过 它记录一个键/值对这样的值。比如我们想定义一个ID(int类型)和Name(string类型)这样的键/值对，那么可以这 样使用。

model:

    [Serializable]

    public  class LessonClassModels

    {

        public long LessonID { get; set; }

        public long ClassID { get; set; }

        public string ClassName { get; set; }

        public int TeacherUIN { get; set; }

        public int LessonsNum { get; set; }

        public long KID { get; set; }

        /// <summary>

        /// 班级的上课时间列表（第一个为上课时间，第二个为下课时间）

        /// </summary>

        public List<KeyValuePair<DateTime, DateTime>> ClassTimeList { get; set; }            

    }

 

 

 

 业务：

public List<LessonClassModels> GetLessonClassGroupList(long lessonId)

        {

            var repository = RepositoryFactory.GetInstance().GetTaokeRepository();

            IList<LessonClass> lessonClasses = repository.GetAllLessonClassByLessonId(lessonId);

            IEnumerable<IGrouping<long, LessonClass>> groupBy = lessonClasses.GroupBy(u => u.ClassID);



            var list = new List<LessonClassModels>();

            foreach (IGrouping<long, LessonClass> grouping in groupBy)

            {

                var models = new LessonClassModels();

                var classTimeList = new List<KeyValuePair<DateTime, DateTime>>();

                models.ClassID = grouping.Key;

                foreach (LessonClass lessonClass in grouping)

                {

                    models.ClassName = lessonClass.ClassName;

                    models.KID = lessonClass.KID;

                    models.LessonsNum = lessonClass.LessonsNum;

                    models.TeacherUIN = lessonClass.TeacherUIN;

                    var keyPair = new KeyValuePair<DateTime, DateTime>(lessonClass.AttendClassTime, lessonClass.FinishClassTime);                     classTimeList.Add(keyPair);

                    models.ClassTimeList = classTimeList;

                }

                list.Add(models);

            }

            return list;

        }

 

 

 

 

 

 

页面：

 

代码

   
     

    
      
    
      <%
    
      
 List
    
      <
    
      LessonClassModels
    
      >
    
       classList 
    
      =
    
       Model.LessonClassList;
 
    
      if
    
       (classList !
    
      =
    
       
    
      null
    
       
    
      &&
    
       classList.Count 
    
      >
    
       
    
      0
    
      )
 {
 foreach (var c in classList)
{

    
      %>
    
      
 
    
      <
    
      tr
    
      >
    
      
 
    
      <
    
      td 
    
      valign
    
      ="top"
    
       style
    
      ="padding:5px 5px;line-height:22px;"
    
      ><
    
      strong
    
      >
    
      <%
    
      =
    
      c.ClassName
    
      %>
    
      </
    
      strong
    
      ><
    
      br 
    
      />
    
      
 每课时
    
      <%
    
      =
    
      lessonSingle.Lesson.LessonTime
    
      %>
    
      分钟
    
      <
    
      br 
    
      />
    
      
 课时费：￥
    
      <%
    
      =
    
      lessonSingle.Lesson.Price 
    
      %>
    
      /课时
    
      <
    
      br 
    
      />
    
      
 课时数：
    
      <%
    
      =
    
      lessonSingle.Lesson.TotalHours
    
      %>
    
      <
    
      br 
    
      />
    
      
 学费合计：￥
    
      <%
    
      =
    
      lessonSingle.Lesson.TotalPrice
    
      %>
    
      </
    
      td
    
      >
    
      
 
    
      <
    
      td 
    
      valign
    
      ="top"
    
       style
    
      ="padding:5px 5px;line-height:22px;text-align:center;"
    
      >
    
      <%
    
      =
    
      c.ClassName
    
      %>
    
      -
    
      <
    
      br 
    
      />
    
      
 
    
      <%
    
      =
    
      c.ClassID
    
      %>
    
      </
    
      td
    
      >
    
      
 
    
      <
    
      td 
    
      valign
    
      ="top"
    
       style
    
      ="padding:5px 5px;line-height:22px;text-align:center;"
    
      >
    
      
 
    
      <%
    
      
 foreach(var 
    
      time
    
       in c.ClassTimeList)
 {
 
    
      %>
    
      
 
    
      <%
    
      =
    
      time
    
      .Key.ToString(
    
      "
    
      MM月dd日
    
      "
    
      )
    
      %>
    
       
    
      <%
    
      =
    
      time
    
      .Key.ToShortTimeString()
    
      %>
    
      ~
    
      <%
    
      =
    
      time
    
      .Value.ToShortTimeString()
    
      %>
    
      <
    
      br 
    
      />
    
      
 
    
      <%
    
      
 }

    
      %>
    
      
 11月25日 14:00~15:00
    
      <
    
      br 
    
      />
    
      
 
 （注：授课时间可以调整）
    
      </
    
      td
    
      >
    
      
 
    
      <
    
      td 
    
      style
    
      ="padding:5px 5px;line-height:22px;"
    
      ><
    
      table 
    
      width
    
      ="120"
    
       border
    
      ="0"
    
       cellspacing
    
      ="0"
    
       cellpadding
    
      ="0"
    
      >
    
      
 
    
      <
    
      tr
    
      >
    
      
 
    
      <
    
      td 
    
      height
    
      ="40"
    
       style
    
      ="text-align:center;"
    
      ><
    
      img 
    
      src
    
      ="/images/baoming.gif"
    
       width
    
      ="92"
    
       height
    
      ="28"
    
       
    
      /></
    
      td
    
      >
    
      
 
    
      </
    
      tr
    
      >
    
      
 
    
      <
    
      tr
    
      >
    
      
 
    
      <
    
      td 
    
      height
    
      ="40"
    
       style
    
      ="text-align:center;"
    
      ><
    
      img 
    
      src
    
      ="/images/sqsy.gif"
    
       width
    
      ="92"
    
       height
    
      ="28"
    
       
    
      /></
    
      td
    
      >
    
      
 
    
      </
    
      tr
    
      >
    
      
 
    
      <
    
      tr
    
      >
    
      
 
    
      <
    
      td 
    
      height
    
      ="40"
    
       style
    
      ="text-align:center;"
    
      ><
    
      img 
    
      src
    
      ="/images/pts2.gif"
    
       width
    
      ="92"
    
       height
    
      ="28"
    
       
    
      /></
    
      td
    
      >
    
      
 
    
      </
    
      tr
    
      >
    
      
 
    
      </
    
      table
    
      ></
    
      td
    
      >
    
      
 
    
      </
    
      tr
    
      >
    
      
 
    
      <%
    
      
}
}
 
    
      else
    
      
 {
 Response.Write(
    
      "
    
      <tr><td></td><td>无班级</td><td></td><td></td></tr>
    
      "
    
      );
 }

    
      %>