c#分页显示服务器上指定目录下的所有图片示例

程序员文章站 2024-02-12 09:31:37

c#分页显示服务器上指定目录下的所有图片复制代码代码如下:<%@ page language="c#" enableviewstate="false" %>...

c#分页显示服务器上指定目录下的所有图片

<%@ 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 = "~/";// 网站根目录下的所有图像
protected void page_load(object sender, eventargs e)
{

    //总页数
    int totalpages = 0;
    //每页显示的数量
    int pageitem = 4;
    //当前页号
    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 + "张图片共" + totalpages + "页第" + pageindex + "页";
}
</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">上一页</asp:hyperlink>
<asp:hyperlink id="nextpage" runat="server">下一页</asp:hyperlink>
<asp:label id="label1" runat="server" text=""></asp:label>
</form>
</body>
</html>

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