MultipleDocumentInterface

Windows Forms - Muliple Document Interface

https://www.youtube.com/watch?v=s4omgpKfimw

File Form1.Design.cs

namespace WindowsFormsApp4
{
    partial class Form1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.menuStrip1 = new System.Windows.Forms.MenuStrip();
            this.fileToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.newToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.openToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.saveToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.saveAsToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.exitToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.aboutToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.formDisplayToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.form2ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.menuStrip1.SuspendLayout();
            this.SuspendLayout();
            // 
            // menuStrip1
            // 
            this.menuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.fileToolStripMenuItem,
            this.aboutToolStripMenuItem,
            this.formDisplayToolStripMenuItem});
            this.menuStrip1.Location = new System.Drawing.Point(0, 0);
            this.menuStrip1.Name = "menuStrip1";
            this.menuStrip1.Size = new System.Drawing.Size(800, 24);
            this.menuStrip1.TabIndex = 0;
            this.menuStrip1.Text = "menuStrip1";
            // 
            // fileToolStripMenuItem
            // 
            this.fileToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.newToolStripMenuItem,
            this.openToolStripMenuItem,
            this.saveToolStripMenuItem,
            this.saveAsToolStripMenuItem,
            this.exitToolStripMenuItem});
            this.fileToolStripMenuItem.Name = "fileToolStripMenuItem";
            this.fileToolStripMenuItem.Size = new System.Drawing.Size(37, 20);
            this.fileToolStripMenuItem.Text = "&File";
            // 
            // newToolStripMenuItem
            // 
            this.newToolStripMenuItem.Name = "newToolStripMenuItem";
            this.newToolStripMenuItem.ShortcutKeys = ((System.Windows.Forms.Keys)((System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.N)));
            this.newToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
            this.newToolStripMenuItem.Text = "&New";
            // 
            // openToolStripMenuItem
            // 
            this.openToolStripMenuItem.Name = "openToolStripMenuItem";
            this.openToolStripMenuItem.ShortcutKeys = ((System.Windows.Forms.Keys)((System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.O)));
            this.openToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
            this.openToolStripMenuItem.Text = "&Open";
            // 
            // saveToolStripMenuItem
            // 
            this.saveToolStripMenuItem.Name = "saveToolStripMenuItem";
            this.saveToolStripMenuItem.ShortcutKeys = ((System.Windows.Forms.Keys)((System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.S)));
            this.saveToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
            this.saveToolStripMenuItem.Text = "&Save";
            // 
            // saveAsToolStripMenuItem
            // 
            this.saveAsToolStripMenuItem.Name = "saveAsToolStripMenuItem";
            this.saveAsToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
            this.saveAsToolStripMenuItem.Text = "S&ave As";
            this.saveAsToolStripMenuItem.Click += new System.EventHandler(this.saveAsToolStripMenuItem_Click);
            // 
            // exitToolStripMenuItem
            // 
            this.exitToolStripMenuItem.Name = "exitToolStripMenuItem";
            this.exitToolStripMenuItem.ShortcutKeys = ((System.Windows.Forms.Keys)((System.Windows.Forms.Keys.Alt | System.Windows.Forms.Keys.F4)));
            this.exitToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
            this.exitToolStripMenuItem.Text = "&Exit";
            // 
            // aboutToolStripMenuItem
            // 
            this.aboutToolStripMenuItem.Name = "aboutToolStripMenuItem";
            this.aboutToolStripMenuItem.Size = new System.Drawing.Size(52, 20);
            this.aboutToolStripMenuItem.Text = "&About";
            // 
            // formDisplayToolStripMenuItem
            // 
            this.formDisplayToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.form2ToolStripMenuItem});
            this.formDisplayToolStripMenuItem.Name = "formDisplayToolStripMenuItem";
            this.formDisplayToolStripMenuItem.Size = new System.Drawing.Size(85, 20);
            this.formDisplayToolStripMenuItem.Text = "FormDisplay";
            // 
            // form2ToolStripMenuItem
            // 
            this.form2ToolStripMenuItem.Name = "form2ToolStripMenuItem";
            this.form2ToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
            this.form2ToolStripMenuItem.Text = "Form2";
            this.form2ToolStripMenuItem.Click += new System.EventHandler(this.form2ToolStripMenuItem_Click);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(800, 450);
            this.Controls.Add(this.menuStrip1);
            this.IsMdiContainer = true;
            this.MainMenuStrip = this.menuStrip1;
            this.Name = "Form1";
            this.Text = "Form1";
            this.WindowState = System.Windows.Forms.FormWindowState.Maximized;
            this.menuStrip1.ResumeLayout(false);
            this.menuStrip1.PerformLayout();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.MenuStrip menuStrip1;
        private System.Windows.Forms.ToolStripMenuItem fileToolStripMenuItem;
        private System.Windows.Forms.ToolStripMenuItem newToolStripMenuItem;
        private System.Windows.Forms.ToolStripMenuItem openToolStripMenuItem;
        private System.Windows.Forms.ToolStripMenuItem saveToolStripMenuItem;
        private System.Windows.Forms.ToolStripMenuItem saveAsToolStripMenuItem;
        private System.Windows.Forms.ToolStripMenuItem exitToolStripMenuItem;
        private System.Windows.Forms.ToolStripMenuItem aboutToolStripMenuItem;
        private System.Windows.Forms.ToolStripMenuItem formDisplayToolStripMenuItem;
        private System.Windows.Forms.ToolStripMenuItem form2ToolStripMenuItem;
    }
}

File Form1.cs

using System;
using System.Windows.Forms;

namespace WindowsFormsApp4
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

        private void form2ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Form2 f2 = new Form2();
            f2.MdiParent = this;
            f2.Show();
        }
    }
}