private void addclass_Load(object sender, EventArgs e) { System.Globalization.CultureInfo inp = new System.Globalization.CultureInfo("fa-IR"); InputLanguage.CurrentInputLanguage = InputLanguage.FromCulture(inp); cur_date = Date.currentDate_Getter(); Courses co = new Courses(); DataTable dtname = new DataTable(); dtname = co.Search("SELECT coursename FROM courses"); txtartcourse.DataSource = dtname; txtartcourse.DisplayMember = "coursename"; txtartcourse.ValueMember = "coursename"; teachers te = new teachers(); DataTable dttename = new DataTable(); dttename = te.Search("SELECT name FROM teachers"); txtteacher.DataSource = dttename; txtteacher.DisplayMember = "name"; txtteacher.ValueMember = "name"; FillDataSetAndView(); if (objCurrencyManager.Count == 0) { foreach (Control c in grpinfo_box.Controls) { if (c.GetType() == typeof(NormalTextbox) || c.GetType() == typeof(NormalCombobox) || c.GetType() == typeof(TimeMaskedTextbox) || c.GetType() == typeof(DateMaskedTextbox)) { c.Enabled = false; } } txtopen_date.Text = cur_date; btnAdd.Enabled = false; btnMoveFirst.Enabled = false; btnMovePrevious.Enabled = false; btnMoveNext.Enabled = false; btnMoveLast.Enabled = false; btnUpdate.Enabled = false; btnNew.Visible = true; txtRecordPosition.Text = "No Record"; toolStripStatusLabel1.Text = "آماده ایجاد رکورد جدید"; } else { BindFields(); objCurrencyManager.Position = objCurrencyManager.Count - 1; ShowPosition(); btnAdd.Enabled = false; } std st = new std(); DataTable dtstdname = new DataTable(); dtstdname = st.Search("SELECT name, stdno FROM std order by name"); txtstdname.DataSource = dtstdname; txtstdname.DisplayMember = "name"; txtstdname.ValueMember = "name"; txtstdno.DataBindings.Clear(); txtstdno.DataBindings.Add("Text", dtstdname, "stdno"); }