protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { ddlPhoto.DataSource = imagemanage.GetAllPhoto("tb_Image").Tables[0].DefaultView; ddlPhoto.DataTextField = "编号"; ddlPhoto.DataBind(); imagemanage.PhotoID = ddlPhoto.SelectedValue; imgPhoto.ImageUrl = imagemanage.FindPhotoByID(imagemanage, "tb_Image").Tables[0].Rows[0][1].ToString(); } }