c#分頁顯示服務器上指定目錄下的所有圖片示例

2020-01-24 02:41:02

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c#分頁顯示服務器上指定目錄下的所有圖片

<%@ Page Language="C#" EnableViewState="false" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

String folder = "~/";// 網站根目錄下的所有圖像
protected void Page_Load(object sender, EventArgs e)
{

    //總頁數
    int TotalPages = 0;
    //每頁顯示的數量
    int pageItem = 4;
    //當前頁號
    int pageIndex = Convert.ToInt32(Request.QueryString["page"]);
    if (pageIndex == 0) pageIndex = 1;

System.IO.DirectoryInfo d = new System.IO.DirectoryInfo(Server.MapPath(folder));
System.IO.FileInfo[] fs = d.GetFiles("*.*").Where(file => file.Name.ToLower().EndsWith(".jpg") || file.Name.ToLower().EndsWith(".gif") || file.Name.ToLower().EndsWith(".bmp") || file.Name.ToLower().EndsWith(".png")).ToArray();

    if (fs.Length % pageItem == 0) TotalPages = fs.Length / pageItem;
    else
    {
      TotalPages = (int)Math.Ceiling((decimal)fs.Length / (decimal)pageItem);
    }
    if (pageIndex > TotalPages) pageIndex = TotalPages;

    System.IO.FileInfo[] fs2 = new System.IO.FileInfo[pageItem];
    int leftCount = pageItem;
    if (fs.Length - ((pageIndex - 1) * pageItem) < pageItem)
    {
      leftCount = fs.Length - (pageIndex - 1) * pageItem;
    }
    Array.Copy(fs, (pageIndex - 1) * pageItem, fs2, 0, leftCount);
    DataList1.DataSource = fs2;
    DataList1.DataBind();
    PrePage.NavigateUrl = Request.FilePath + "?page=" + (pageIndex - 1);
    NextPage.NavigateUrl = Request.FilePath + "?page=" + (pageIndex + 1);
    Label1.Text = fs.Length + "張圖片共" + TotalPages + "頁第" + pageIndex + "頁";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<body>
<form runat="server">
<asp:DataList ID="DataList1" runat="server" RepeatColumns="2" Border="1">
    <ItemTemplate>
      <img src='<%#Page.ResolveUrl(folder + Eval("Name"))%>' width="200" height="200" />
    </ItemTemplate>
    <AlternatingItemTemplate>
      <img src='<%#Page.ResolveUrl(folder + Eval("Name"))%>' width="200" height="200" />
    </AlternatingItemTemplate>
</asp:DataList>
<asp:HyperLink ID="PrePage" runat="server">上一頁</asp:HyperLink>
<asp:HyperLink ID="NextPage" runat="server">下一頁</asp:HyperLink>
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
</form>
</body>
</html>