protected void imgProject_Click(object sender, ImageClickEventArgs e) { ImageButton b = sender as ImageButton; string projectId = b.Attributes["projectId"]; string projectName = b.Attributes["projectName"]; lblProjectName.Text = projectName; lblProjectName.Visible = true; List <Photo> listphoto = SqlTask.GetPhotosByProject(projectId); string userid = listphoto.ElementAt(0).UserID; btnBackAllPhoto.PostBackUrl = "http://teambro.azurewebsites.net/" + SqlTask.GetUserUrlById(listphoto.ElementAt(0).UserID); btnBackAllPhoto.Visible = true; lstPhoto.DataSource = listphoto; lstPhoto.DataBind(); }