《ASP.NET1200例》分页显示图片

aspx页面代码

<asp:DataList ID="dlPhoto" runat="server" Height="137px" 
             Width="277px" onitemcommand="dlPhoto_ItemCommand" RepeatDirection="Horizontal">         
            <ItemTemplate>
                <%# DataBinder.Eval(Container.DataItem, "imageUrl") %>
                <asp:ImageButton ID="ImageButton1" ImageUrl="image/20131128.jpg" Height="100px" Width ="200px" runat="server" /><br />
                <asp:Label ID="Label1" runat="server" >相册名称</asp:Label>
                <asp:ImageButton id="ProductImage" ImageUrl='<%# DataBinder.Eval(Container.DataItem, "imageUrl") %>' Height="100px" Width ="200px" runat="server"/>
            </ItemTemplate>
             <FooterTemplate>
                <asp:LinkButton ID="LinkButton1" CommandName="first" runat="server" >首页</asp:LinkButton>
                <asp:LinkButton ID="LinkButton2" CommandName="pre" runat="server">上一页</asp:LinkButton>
                <asp:LinkButton ID="LinkButton3" CommandName="next" runat="server">下一页</asp:LinkButton>
                <asp:LinkButton ID="LinkButton4"  CommandName="last" runat="server">末页</asp:LinkButton>
                <asp:TextBox ID="txtPage" runat="server" Height="18px" Width="34px"></asp:TextBox>
                <asp:LinkButton ID="LinkButton5"  CommandName="search" runat="server">Go</asp:LinkButton>
            </FooterTemplate>
        </asp:DataList>

 

aspx.cs

 public partial class _232DataList : System.Web.UI.Page
    {
        PagedDataSource pds = new PagedDataSource();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                bindDL(0);

            }
        }
        public void bindDL(int curPage)
        {
           
            pds.AllowPaging = true;
            pds.PageSize = 2;
            pds.CurrentPageIndex = curPage;

            //绑定数据源
            ShowImageBll ShowImageBll = new BLL.ShowImageBll();
            DataSet ds=ShowImageBll.GetList();
            pds.DataSource = ds.Tables[0].DefaultView;
            dlPhoto.DataSource = pds;
            dlPhoto.DataBind();

        }

        protected void dlPhoto_ItemCommand(object source, DataListCommandEventArgs e)
        {
           
            switch (e.CommandName)
            {
                case "first":
                    if (pds.CurrentPageIndex != 0)
                    {
                        pds.CurrentPageIndex = 0;
                    }
                    else
                    {
                        Response.Write("<script language=javascript>" + "alert(\"已经是第一页\")" + "</script>");
                    }
                    bindDL(pds.CurrentPageIndex);
                    break;
                case "pre":
                    if (pds.CurrentPageIndex > 0) {
                        pds.CurrentPageIndex = pds.CurrentPageIndex - 1;
                        bindDL(pds.CurrentPageIndex);
                    }
                    else
                    {
                        Response.Write("<script language=javascript>" + "alert(\"已经是第一页\")" + "</script>");
                    }
                    
                    break;
                case "next":
                    if (pds.CurrentPageIndex < pds.PageCount - 1)
                    {
                        pds.CurrentPageIndex = pds.CurrentPageIndex + 1;
                        bindDL(pds.CurrentPageIndex);
                    }
                    else
                    {
                        Response.Write("<script language=javascript>" + "alert(\"已经是最后一页\")" + "</script>");
                    }
                   
                    break;
                case "last":
                    if (pds.CurrentPageIndex != pds.PageCount - 1)
                    {
                        pds.CurrentPageIndex = pds.PageCount - 1;

                    }
                    else
                    {
                        Response.Write("<script language=javascript>" + "alert(\"已经是最后一页\")" + "</script>");
                    }
                    bindDL(pds.CurrentPageIndex);
                    break;
                case "search":
                    if (e.Item.ItemType == ListItemType.Footer)
                    {
                        int pageCount = int.Parse(pds.PageCount.ToString ());
                        TextBox txtPage = e.Item.FindControl("txtPage") as TextBox;
                        int myPage = 0;
                        if(txtPage .Text !=null)
                        {
                          myPage = int.Parse(txtPage .Text.Trim ().ToString ());
                        
                        }
                        if (myPage <=0||myPage >pageCount ) {
                            Response .Write ("<script>alert('请输入正确的页面数！')</script>");
                        
                        }
                        bindDL(myPage-1); 
                    
                    
                    }
                    break;   
            } 
        }

    }

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