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<asp:DataList ID="imageList" runat="server" RepeatColumns="3" Width="200px">
<ItemTemplate>
<asp:Image ImageUrl='<%# Eval("Name","~/UpLoad/{0}") %>' ID="image1" runat="server" />
</ItemTemplate>
</asp:DataList>
<br />
<asp:FileUpload ID="Fupload" runat="server" />
<asp:Button ID="btnAdd" Text="upload" runat="server" OnClick="btnAdd_Click" />
protected void Page_PreRender()
{
string upFolder = Server.MapPath("~/UpLoad/");
DirectoryInfo dir = new DirectoryInfo(upFolder);
this.imageList.DataSource = dir.GetFiles();
this.imageList.DataBind();
}