显示文件夹下所有图片

string[] strImage = Directory.GetFiles(Server.MapPath("~/userphoto/"));

DataTable dt_image = new DataTable();
dt_image.Columns.Add("images");
foreach (string str in strImage)
{
    string strUrl = "userphoto/" + str.Substring(str.LastIndexOf("\\"), str.Length - str.LastIndexOf("\\"));
    dt_image.Rows.Add(strUrl.Replace("/\\", "/"));
   
}
dlContent.DataSource = dt_image;
dlContent.DataBind();