How to call multiple images id wise from folder.

i want to call images id wise from folder by using Asp:Data List

i am confuse, that where to pass id to get files from folder

{
string[] filePaths = Directory.GetFiles(Server.MapPath("~/DistributorShopImages/" ));
List<listitem> files = new List<listitem>();
foreach (string filePath in filePaths)
{
string fileName = Path.GetFileName(filePath);
files.Add(new ListItem(fileName, "~/DistributorShopImages/" + fileName));
}
DataList1.DataSource = files;
DataList1.DataBind();
}