MDI children form background : MDI : GUI Windows Forms C# Examples

    
using  System;
using  System.Collections.Generic;
using  System.ComponentModel;
using  System.Data;
using  System.Drawing;
using  System.Text;
using  System.Windows.Forms;

public  partial  class  ChildForm  :  Form
{
        public  ChildForm()
        {
                InitializeComponent();
        }

        private  void  settoRedToolStripMenuItem_Click(object  sender,  EventArgs  e)
        {
                this.BackColor  =  Color.Red;
        }

        private  void  settoBlueToolStripMenuItem_Click(object  sender,  EventArgs  e)
        {
                this.BackColor  =  Color.Blue;
        }

        private  void  settoGreenToolStripMenuItem_Click(object  sender,  EventArgs  e)
        {
                this.BackColor  =  Color.Green;
        }

        public  void  Save()
        {
                MessageBox.Show("I  have  saved  my  data!");
        }
}
partial  class  ChildForm
{
        private  void  InitializeComponent()
        {
                this.menuStrip1  =  new  System.Windows.Forms.MenuStrip();
                this.specialToolStripMenuItem  =  new  System.Windows.Forms.ToolStripMenuItem();
                this.settoRedToolStripMenuItem  =  new  System.Windows.Forms.ToolStripMenuItem();
                this.settoBlueToolStripMenuItem  =  new  System.Windows.Forms.ToolStripMenuItem();
                this.settoGreenToolStripMenuItem  =  new  System.Windows.Forms.ToolStripMenuItem();
                this.menuStrip1.SuspendLayout();
                this.SuspendLayout();
                //  
                //  menuStrip1
                //  
                this.menuStrip1.Items.AddRange(new  System.Windows.Forms.ToolStripItem[]  {
                this.specialToolStripMenuItem});
                this.menuStrip1.Location  =  new  System.Drawing.Point(0,  0);
                this.menuStrip1.Name  =  "menuStrip1";
                this.menuStrip1.Size  =  new  System.Drawing.Size(534,  24);
                this.menuStrip1.TabIndex  =  0;
                this.menuStrip1.Text  =  "menuStrip1";
                //  
                //  specialToolStripMenuItem
                //  
                this.specialToolStripMenuItem.DropDownItems.AddRange(new  System.Windows.Forms.ToolStripItem[]  {
                this.settoRedToolStripMenuItem,
                this.settoBlueToolStripMenuItem,
                this.settoGreenToolStripMenuItem});
                this.specialToolStripMenuItem.Name  =  "specialToolStripMenuItem";
                this.specialToolStripMenuItem.Text  =  "&Special";
                //  
                //  settoRedToolStripMenuItem
                //  
                this.settoRedToolStripMenuItem.ImageTransparentColor  =  System.Drawing.Color.Magenta;
                this.settoRedToolStripMenuItem.Name  =  "settoRedToolStripMenuItem";
                this.settoRedToolStripMenuItem.Text  =  "Set  to  Red";
                this.settoRedToolStripMenuItem.Click  +=  new  System.EventHandler(this.settoRedToolStripMenuItem_Click);
                //  
                //  settoBlueToolStripMenuItem
                //  
                this.settoBlueToolStripMenuItem.ImageTransparentColor  =  System.Drawing.Color.Magenta;
                this.settoBlueToolStripMenuItem.Name  =  "settoBlueToolStripMenuItem";
                this.settoBlueToolStripMenuItem.Text  =  "Set  to  Blue";
                this.settoBlueToolStripMenuItem.Click  +=  new  System.EventHandler(this.settoBlueToolStripMenuItem_Click);
                //  
                //  settoGreenToolStripMenuItem
                //  
                this.settoGreenToolStripMenuItem.ImageTransparentColor  =  System.Drawing.Color.Magenta;
                this.settoGreenToolStripMenuItem.Name  =  "settoGreenToolStripMenuItem";
                this.settoGreenToolStripMenuItem.Text  =  "Set  to  Green";
                this.settoGreenToolStripMenuItem.Click  +=  new  System.EventHandler(this.settoGreenToolStripMenuItem_Click);
                //  
                //  ChildForm
                //  
                this.AutoScaleDimensions  =  new  System.Drawing.SizeF(6F,  13F);
                this.AutoScaleMode  =  System.Windows.Forms.AutoScaleMode.Font;
                this.ClientSize  =  new  System.Drawing.Size(534,  541);
                this.Controls.Add(this.menuStrip1);
                this.MainMenuStrip  =  this.menuStrip1;
                this.Name  =  "ChildForm";
                this.Text  =  "ChildForm";
                this.menuStrip1.ResumeLayout(false);
                this.ResumeLayout(false);
                this.PerformLayout();

        }

        private  System.Windows.Forms.MenuStrip  menuStrip1;
        private  System.Windows.Forms.ToolStripMenuItem  specialToolStripMenuItem;
        private  System.Windows.Forms.ToolStripMenuItem  settoRedToolStripMenuItem;
        private  System.Windows.Forms.ToolStripMenuItem  settoBlueToolStripMenuItem;
        private  System.Windows.Forms.ToolStripMenuItem  settoGreenToolStripMenuItem;
}

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

        private  void  newToolStripMenuItem_Click(object  sender,  EventArgs  e)
        {
                ChildForm  child  =  new  ChildForm();
                child.MdiParent  =  this;
                child.Show();
        }



        private  void  saveToolStripMenuItem_Click(object  sender,  EventArgs  e)
        {
                ChildForm  formToSave  =  (ChildForm)this.ActiveMdiChild;
                formToSave.Save();
        }

        private  void  fileToolStripMenuItem_DropDownOpening(object  sender,  EventArgs  e)
        {
                if  (this.MdiChildren.Length  ==  0)
                        saveToolStripMenuItem.Enabled  =  false;
                else
                        saveToolStripMenuItem.Enabled  =  true;
        }
}

partial  class  Form1
{
        private  void  InitializeComponent()
        {
                this.menuStrip1  =  new  System.Windows.Forms.MenuStrip();
                this.fileToolStripMenuItem  =  new  System.Windows.Forms.ToolStripMenuItem();
                this.toolStripSeparator1  =  new  System.Windows.Forms.ToolStripSeparator();
                this.newToolStripMenuItem  =  new  System.Windows.Forms.ToolStripMenuItem();
                this.saveToolStripMenuItem  =  new  System.Windows.Forms.ToolStripMenuItem();
                this.exitToolStripMenuItem  =  new  System.Windows.Forms.ToolStripMenuItem();
                this.menuStrip1.SuspendLayout();
                this.SuspendLayout();
                //  
                //  menuStrip1
                //  
                this.menuStrip1.Items.AddRange(new  System.Windows.Forms.ToolStripItem[]  {
                this.fileToolStripMenuItem});
                this.menuStrip1.Location  =  new  System.Drawing.Point(0,  0);
                this.menuStrip1.Name  =  "menuStrip1";
                this.menuStrip1.Size  =  new  System.Drawing.Size(576,  24);
                this.menuStrip1.TabIndex  =  0;
                this.menuStrip1.Text  =  "menuStrip1";
                //  
                //  fileToolStripMenuItem
                //  
                this.fileToolStripMenuItem.DropDownItems.AddRange(new  System.Windows.Forms.ToolStripItem[]  {
                this.newToolStripMenuItem,
                this.saveToolStripMenuItem,
                this.toolStripSeparator1,
                this.exitToolStripMenuItem});
                this.fileToolStripMenuItem.Name  =  "fileToolStripMenuItem";
                this.fileToolStripMenuItem.Text  =  "&File";
                this.fileToolStripMenuItem.DropDownOpening  +=  new  System.EventHandler(this.fileToolStripMenuItem_DropDownOpening);
                //  
                //  toolStripSeparator1
                //  
                this.toolStripSeparator1.Name  =  "toolStripSeparator1";
                //  
                //  newToolStripMenuItem
                //  
                this.newToolStripMenuItem.ImageTransparentColor  =  System.Drawing.Color.Magenta;
                this.newToolStripMenuItem.Name  =  "newToolStripMenuItem";
                this.newToolStripMenuItem.Text  =  "&New";
                this.newToolStripMenuItem.Click  +=  new  System.EventHandler(this.newToolStripMenuItem_Click);
                //  
                //  saveToolStripMenuItem
                //  
                this.saveToolStripMenuItem.ImageTransparentColor  =  System.Drawing.Color.Magenta;
                this.saveToolStripMenuItem.Name  =  "saveToolStripMenuItem";
                this.saveToolStripMenuItem.Text  =  "&Save";
                this.saveToolStripMenuItem.Click  +=  new  System.EventHandler(this.saveToolStripMenuItem_Click);
                //  
                //  exitToolStripMenuItem
                //  
                this.exitToolStripMenuItem.ImageTransparentColor  =  System.Drawing.Color.Magenta;
                this.exitToolStripMenuItem.Name  =  "exitToolStripMenuItem";
                this.exitToolStripMenuItem.Text  =  "E&xit";
                //  
                //  Form1
                //  
                this.AutoScaleDimensions  =  new  System.Drawing.SizeF(6F,  13F);
                this.AutoScaleMode  =  System.Windows.Forms.AutoScaleMode.Font;
                this.ClientSize  =  new  System.Drawing.Size(576,  438);
                this.Controls.Add(this.menuStrip1);
                this.IsMdiContainer  =  true;
                this.MainMenuStrip  =  this.menuStrip1;
                this.Name  =  "Form1";
                this.Text  =  "Form1";
                this.menuStrip1.ResumeLayout(false);
                this.ResumeLayout(false);
                this.PerformLayout();

        }

        private  System.Windows.Forms.MenuStrip  menuStrip1;
        private  System.Windows.Forms.ToolStripMenuItem  fileToolStripMenuItem;
        private  System.Windows.Forms.ToolStripMenuItem  saveToolStripMenuItem;
        private  System.Windows.Forms.ToolStripSeparator  toolStripSeparator1;
        private  System.Windows.Forms.ToolStripMenuItem  exitToolStripMenuItem;
        private  System.Windows.Forms.ToolStripMenuItem  newToolStripMenuItem;
}

public  class  ChildFormBackGround
{
        [STAThread]
        static  void  Main()
        {
                Application.EnableVisualStyles();
                Application.Run(new  Form1());
        }
}