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Код


<asp:Repeater runat="server" ID="Repeater1" >
            <ItemTemplate>
                <img src='<%# Eval("FilePath") %>' alt="Image" />
                <br />
            </ItemTemplate>
        </asp:Repeater>

Код


public partial class Home : System.Web.UI.Page
    {
        private List<Image> ImagesDataSource
        {
            get
            {
                return ViewState["ImagesDataSource"] as List<Image>;
            }
            set
            {
                ViewState["ImagesDataSource"] = value;
            }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                if (ImagesDataSource == null)
                {
                    UpdateImagesDataSource();
                    Repeater1.DataSource = ImagesDataSource;
                    Repeater1.DataBind();
                }
            }
        }

        private void UpdateImagesDataSource()
        {
            string imagesFileFilePath = Server.MapPath("~/App_Data/Images.txt");
            ImagesDataSource = (from filePath in File.ReadAllLines(imagesFileFilePath)
                                select new Image { FilePath = filePath }).ToList();
            string imagesFolderPath = Server.MapPath("~/Images/");
            ImagesDataSource.ForEach(image =>
            {
                if (!Uri.IsWellFormedUriString(image.FilePath, UriKind.Absolute))
                {
                    File.Copy(image.FilePath, Path.Combine(imagesFolderPath, Path.GetFileName(image.FilePath)), true);
                    image.FilePath = ResolveUrl(string.Format("~/Images/{0}", Path.GetFileName(image.FilePath)));
                }
            });
                
        }
    }

    [Serializable]
    public class Image
    {
        public string FilePath
        {
            get;
            set;
        }
    }