1

我有一个中继器，它将我所有的图像放在一个文件夹中并显示它。但是我必须进行哪些代码更改才能只允许说 Image1.jpg 和 Image2.jpg 显示在我的转发器中。我不希望中继器显示我文件夹中的所有图像。

我的中继器

<asp:Repeater ID="repImages" runat="server" OnItemDataBound="repImages_ItemDataBound">
<HeaderTemplate><p></HeaderTemplate>
<ItemTemplate>
    <asp:HyperLink ID="hlWhat" runat="server" rel="imagebox-bw">
    <asp:Image ID="imgTheImage" runat="server" />
    </asp:HyperLink>
</ItemTemplate>
<FooterTemplate></p></FooterTemplate>
</asp:Repeater>

我的代码背后 - 页面加载

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string sBasePath = System.Web.HttpContext.Current.Request.ServerVariables["APPL_PHYSICAL_PATH"];
            if ( sBasePath.EndsWith("\\"))
                sBasePath = sBasePath.Substring(0,sBasePath.Length-1);

            sBasePath = sBasePath + "\\" + "pics";

            System.Collections.Generic.List<string> oList = new System.Collections.Generic.List<string>();
            foreach (string s in System.IO.Directory.GetFiles(sBasePath, "*.*"))
            {
                //We could do some filtering for example only adding .jpg or something
                oList.Add( System.IO.Path.GetFileName( s ));

            }
            repImages.DataSource = oList;
            repImages.DataBind();
        }

    }

My Code behind - Repeater 的 ItemDataBound 事件代码

protected void repImages_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.AlternatingItem ||
            e.Item.ItemType == ListItemType.Item)
        {
            string sFile = e.Item.DataItem as string;

            //Create the thumblink
            HyperLink hlWhat = e.Item.FindControl("hlWhat") as HyperLink;
            hlWhat.NavigateUrl = ResolveUrl("~/pics/" + sFile  );
            hlWhat.ToolTip = System.IO.Path.GetFileNameWithoutExtension(sFile);
            hlWhat.Attributes["rel"] = "imagebox-bw";

            Image oImg = e.Item.FindControl("imgTheImage") as Image;
            oImg.ImageUrl = ResolveUrl("~/createthumb.ashx?gu=/pics/" + sFile + "&xmax=100&ymax=100" );


        }

    }

回答：

我更新的页面加载

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string sBasePath = System.Web.HttpContext.Current.Request.ServerVariables["APPL_PHYSICAL_PATH"];
            if ( sBasePath.EndsWith("\\"))
                sBasePath = sBasePath.Substring(0,sBasePath.Length-1);

            sBasePath = sBasePath + "\\" + "pics";

            System.Collections.Generic.List<string> oList = new System.Collections.Generic.List<string>();

            string[] extensions = { "*.jpg", "*.png" };

            List<string> files = new List<string>(); 

            foreach (string filter in extensions) 
            {
                files.AddRange(System.IO.Directory.GetFiles(sBasePath, filter)); 
                oList.Add(System.IO.Path.GetFileName(filter));
            }


            repImages.DataSource = oList;
            repImages.DataBind();
        }
4

3 回答 3

4

您要显示的图像名称是什么格式？如果您知道可以构造一个过滤器以在列出目录内容时使用：

string[] files = Directory.GetFiles(folder, "*1.jpg");

将列出所有以“1”结尾的 jpg 文件

编辑：

而不是：

foreach (string s in System.IO.Directory.GetFiles(sBasePath, "*.*"))
{
    //We could do some filtering for example only adding .jpg or something
    oList.Add( System.IO.Path.GetFileName( s ));
}

你会有：

string[] files = System.IO.Directory.GetFiles(sBasePath, "*.jpg")
foreach (string s in files)
{
    oList.Add( System.IO.Path.GetFileName( s ));
}

编辑2：

我进行了快速搜索，看起来 Get Files 不会采用多个扩展名，因此您必须分别搜索每种类型的扩展名：

string[] extensions = {"*.jpg" , "*.png" };

List<string> files = new List<string>();
foreach(string filter in extensions)
{
    files.AddRange(System.IO.Directory.GetFiles(path, filter));
}
foreach (string s in files)
{
    oList.Add( System.IO.Path.GetFileName( s ));
}
于 2009-04-07T10:21:21.890 回答
2

最简单的方法是将它们全部加载到 List<> 中，然后使用 Linq 过滤掉你想要的。

VS2005

public class GetFiles
{

    public static void Main(string[] args)
    {
        FileInfo[] files = 
            new DirectoryInfo(@"D:\downloads\_Installs").GetFiles();
        ArrayList exefiles = new ArrayList();

        foreach (FileInfo f in files)
        {
            if (f.Extension == ".exe") // or whatever matching you want to do.
            {
                exefiles.Add(f);
            }
        }

        foreach (FileInfo f in exefiles)
        {
            Console.WriteLine(f.FullName);
        }
        Console.ReadKey();
    }
}

VS2008

public class GetFiles
{
    public static void Main(string[] args)
    {
        FileInfo[] files = 
            new DirectoryInfo(@"D:\downloads\_Installs").GetFiles();

        var exefiles = from FileInfo f in files 
                       where f.Extension == ".exe" 
                       select f;

        foreach (FileInfo f in exefiles)
        {
            Console.WriteLine(f.FullName);
        }

        Console.ReadKey();
    }
}
于 2009-04-07T11:39:27.210 回答
0

您需要做的是在将列表绑定到转发器控件之前过滤掉所有您不想显示的图像。

于 2009-04-07T10:12:52.253 回答