Repeater 分页的实现

想法：想让REPATER实现分页的功能并让已有的REPEATER控件比较复用。

做法: 继承OUT OF BOX的REPEATER，然后利用PAGEDDATASOURCE这种类型的数据源实现分页。最后定义了一个FOOTTEMPLATE类来实现ITEMPLATE接口实现分页的FOOTER CONTROL

PagedRepeater.cs //这个类主要是继承默认的Repeater 然后增加了一个PAGEDDATASOURCE 属性

[Designer("PagedRepeater")]
  public class PagedRepeater: Repeater
  {
      public PagedDataSource pds
      {
          get;
          set;
      }
      private int _pageSize;
      public int PageSize
      {
          set
          {
              _pageSize = value;
          }
          get
          {
              if (pds != null)
              {
                  return pds.PageSize;
              }
              else
              {
                  return 0;
              }
          }
      }
      private int _currentPageIndex;
      public int CurrentPageIndex
      {

          get
          {
              if (ViewState["CurrentPageIndex"] != null)
              {
                  _currentPageIndex = Int32.Parse(ViewState["CurrentPageIndex"].ToString());
                  return _currentPageIndex;
              }
              else
              {
                  return 0;
              }
          }
          set
          {
              _currentPageIndex = value;
              ViewState["CurrentPageIndex"] = _currentPageIndex;
          }
      }
      public int PageCount
      {
          get {
              if (pds != null)
              {
                  return pds.PageCount;
              }
              else
              {
                  return 0;
              }
          }
      }
      public override void DataBind()
      {
          if (HttpContext.Current.Request.Form["__EVENTTARGET"]!=null&&HttpContext.Current.Request.Form["__EVENTTARGET"].ToLower().Contains("pagedrp"))
          {
              string postbackdata = HttpContext.Current.Request.Form["__EVENTARGUMENT"];
               CurrentPageIndex = Int32.Parse(postbackdata);
          }
          pds.CurrentPageIndex = CurrentPageIndex;
          pds.AllowPaging = true;
          pds.PageSize = 10;
          this.DataSource = pds;
          this.FooterTemplate = new FooterTemplate(CurrentPageIndex, PageSize, PageCount);
          base.DataBind();

      }
      protected override void OnInit(EventArgs e)
      {
          base.OnInit(e);
          pds = new PagedDataSource();
      }
  }

FooterTemplate.cs // 这个实现ITEMPLATE 接口

public class FooterTemplate:ITemplate
  {
       public int PageSize
       {
           get;
           set;
       }
      public int CurrentPageIndex
      {
          get;
          set;
      }


      public int PageCount
      {
          get;
          set;
      }

       public FooterTemplate(int pageCurrentIndex, int pageSize, int pageCount)
       {
           this.PageSize = pageSize;
           this.CurrentPageIndex = pageCurrentIndex;
           this.PageCount = pageCount;
       }

       public string LinkTemplate
       {
           get
           {
               return "<a onclick='" + "javascript:__doPostBack(\"pagedrp\",{1})'" + ">{0}</a>";
           }

       }

       public virtual Control GenerateHyperLink()
       {
           var control = new LiteralControl();
           for (int i = 1; i <= this.PageCount; i++)
           {
               control.Text = control.Text + string.Format(LinkTemplate, i,i-1);
           }
           return control;
       }
      public void InstantiateIn(Control container)
      {
          container.Controls.Add(GenerateHyperLink());
      }
  }

调用

 

    protected override void OnPreRender(EventArgs e)
     {
         base.OnPreRender(e);
         List<YourClass> list = GetYourClassList();
         repeater1.pds.DataSource = list;
         repeater1.DataBind();
     }

结果：

这样一个简单的分页功能就能够实现了， 希望大家多多指教！