extends DomainUpDown : DomainUpDown « System.Windows.Forms « C# / C Sharp by API

1. C# / C Sharp by API
2. System.Windows.Forms
3. DomainUpDown

extends DomainUpDown

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

    public class UpDownDerived : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Label label1;
        private MyUpDownControl mDC = null ; 
        public UpDownDerived()
        {
            this.mDC = new MyUpDownControl();
            this.label1 = new System.Windows.Forms.Label();
            this.SuspendLayout();

            this.mDC.Items.Add("FRANCE");
            this.mDC.Items.Add("ITALY");
            this.mDC.Items.Add("USA");
            this.mDC.Items.Add("UK");
            this.mDC.Items.Add("AUSTRALIA");
            this.mDC.Items.Add("INDIA");
            this.mDC.Items.Add("ZAMBIA");
            this.mDC.Items.Add("MALASYIA");
            this.mDC.Location = new System.Drawing.Point(40, 40);

            this.label1.Location = new System.Drawing.Point(16, 16);
            this.label1.Size = new System.Drawing.Size(200, 16);
            this.label1.Text = "Derived DomainUpDown Controller";

            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(248, 85);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.label1,
                                                                          this.mDC});
            this.Name = "UpDownDerived";
            this.Text = "My Domain Controller";
            this.Load += new System.EventHandler(this.UpDownDerived_Load);
            this.ResumeLayout(false);

        }
        static void Main() 
        {
            Application.Run(new UpDownDerived());
        }

        private void UpDownDerived_Load(object sender, System.EventArgs e)
        {
        }
    }

    public class MyUpDownControl : System.Windows.Forms.DomainUpDown  
    {
        private int currentPos  =0;
        private string DisplayText ="";
        public MyUpDownControl()
        {
            Items.Add("FRANCE");
            Items.Add("ITALY");
            Items.Add("USA");
            Items.Add("UK");
            Items.Add("AUSTRALIA");
            Items.Add("INDIA");
            Items.Add("ZAMBIA");
            Items.Add("MALASYIA");
        
        }

        public override void DownButton()
        {
            // Check if the Down Arrow is clicked
            currentPos ++;
            if ( currentPos >= Items.Count )
                currentPos = 0 ; 
            UpdateEditText();
        }

        public override void UpButton()
        {
            // Check if the Up Arrow is clicked
            currentPos -- ; 
            if ( currentPos < 0 ) currentPos = Items.Count-1 ; 
            UpdateEditText();
        }

        protected override void UpdateEditText()
        {
            // Update the EditBox 
            DisplayText = (string)this.Items[currentPos ];
            this.Text = DisplayText; 
        }

        public void Sort()
        {
            if ( this.Sorted ) 
                this.Sorted= false ;
            else
                this.Sorted= true ;

            if ( this.Sorted ) 
                this.Sort() ;
            
            UpdateEditText() ;
        }
    }

   
  

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