protected void Page_Load(object sender, EventArgs e) { if (Session["userId"] == null) { //Response.Redirect("index.aspx"); } else { var sessionUserId = Session["userId"].ToString(); //EntityDataSource1.Where = "it.[user_id] = '" + sessionUserId + "'"; studymsl_dbEntities db = new studymsl_dbEntities(); GridView1.DataSource = db.progresses.Where(a => a.user_id.Contains(sessionUserId)).ToList(); GridView1.DataBind(); } }