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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace ConsoleApplication4 { class AForm : Form { Label gt; TextBox textbox; Button btn; Menu menu; TextBox textbox2, kq; public AForm() { /* textbox = new TextBox(); textbox.Location = new System.Drawing.Point(10,10); //textbox.TextAlign = this.Controls.Add(textbox); textbox2 = new TextBox(); textbox2.Location = new System.Drawing.Point(10, 50); //textbox2.TextAlign = ("Nhap so a"); this.Controls.Add(textbox2); btn = new Button(); btn.Location = new System.Drawing.Point(10, 80); btn.Text = "Tong"; this.Controls.Add(btn); this.btn.Click += new EventHandler(btn_Click); kq = new TextBox(); kq.Location = new System.Drawing.Point(10, 110); kq.Text = ""; this.Controls.Add(kq); */ RichTextBox richTB = new RichTextBox(); richTB.Size=new System.Drawing.Size(this.Height,this.Width); this.Controls.Add(richTB); gt = new Label(); gt.Text = ""; gt.Anchor = AnchorStyles.Bottom; this.Controls.Add(gt); MainMenu menu = new MainMenu(); MenuItem file = new MenuItem(); file.Text = "&File"; MenuItem format = new MenuItem(); format.Text = "&Format"; MenuItem edit = new MenuItem(); edit.Text = "&Edit"; MenuItem file_new = new MenuItem(); file_new.Text = "&New"; MenuItem file_open = new MenuItem(); file_open.Text = "&Open"; file.MenuItems.Add(file_new); file.MenuItems.Add(file_open); menu.MenuItems.Add(file); menu.MenuItems.Add(format); menu.MenuItems.Add(edit); file_open.ShowShortcut = true; file_open.Shortcut = Shortcut.CtrlO; file_new.ShowShortcut = true; file_new.Shortcut = Shortcut.CtrlN; file_open.Click += new EventHandler(open_click); file_new.Click += new EventHandler(new_click); file_open.Select += new EventHandler(ShowInfo); file_new.Select += new EventHandler(ShowInfo); this.Menu=menu; } public void ShowInfo(Object o, EventArgs e) { MenuItem item= (MenuItem)o; String name = item.Text; // MessageBox.Show(name); this.gt.Text = name; } public void open_click(Object o, EventArgs e) { MessageBox.Show("Đã nhấn Open"); } public void new_click(Object o, EventArgs e) { MessageBox.Show("Đã nhấn New"); } public void btn_Click(Object o, EventArgs e) { double a, b; if (double.TryParse(this.textbox.Text,out a) == false || double.TryParse(this.textbox2.Text, out b) == false) { MessageBox.Show("VUi long nhap dung dinh dang"); return; } //double a = double.Parse(this.textbox.Text); //double b = double.Parse(this.textbox2.Text); kq.Text = ((a + b).ToString()); } } class Program { static void Main(string[] args) { AForm f = new AForm(); Application.Run(f); } } }

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