Hi, I have to display images from a folder in imagefield. I am using following code but its not showing the image. Please help!

DataTable dt = new DataTable();
// dt.Columns.Add("S.No", typeof(string));
dt.Columns.Add("NeckLace", typeof(string));
DataRow dr;
int i = 1;
foreach (string file in Directory.GetFiles(Server.MapPath(@"NeckLace\")))
{
//string nm = Path.GetFileName(file);
dr = dt.NewRow();
// dr[0] = i.ToString();
dr[0] = ResolveUrl(file);
dt.Rows.Add(dr);
i += 1;
}
GridView1.DataSource = dt;
GridView1.DataBind();