using System;

using System.Drawing;

using System.Windows.Forms;

​

namespace TestProgressBar

{

    public partial class Form1 : Form

    {

        VerticalProgressBar vp = new VerticalProgressBar();

        public Form1()

        {

            InitializeComponent();

​

            vp.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)

            | System.Windows.Forms.AnchorStyles.Left)

            | System.Windows.Forms.AnchorStyles.Right)));

            vp.Location = new System.Drawing.Point(3, 3);

            vp.Name = "progressBar1";

            vp.Size = new System.Drawing.Size(382, 207);

            vp.Style = System.Windows.Forms.ProgressBarStyle.Continuous;

            vp.TabIndex = 0;

​

            this.tableLayoutPanel1.Controls.Add(vp, 1, 1);

        }

​

        private void trackBar1_ValueChanged(object sender, EventArgs e)

        {

            progressBar1.Value = trackBar1.Value;

            vp.Value = trackBar1.Value;

        }

    }

​

​

​

    public class VerticalProgressBar : ProgressBar

    {

        int Threshold = 70;

        Brush brush;

        public new int Value

        {

            get

            {

                return base.Value;

            }

            set

            {

                base.Value = value;

                if (value > Threshold)

                    brush = Brushes.Green;

                else

                    brush = Brushes.Red;

            }

        }

        public VerticalProgressBar()

        {

            this.SetStyle(ControlStyles.UserPaint, true);

            brush = Brushes.Green;

        }

        protected override void OnPaint(PaintEventArgs e)

        {

            int y_base = e.ClipRectangle.Height;

            Rectangle rec = e.ClipRectangle;

            rec.Height = (int)(y_base - (rec.Height * ((double)Value / Maximum)));

            if (ProgressBarRenderer.IsSupported)

                ProgressBarRenderer.DrawHorizontalBar(e.Graphics, e.ClipRectangle);

            rec.Width = rec.Width - 4;

            e.Graphics.FillRectangle(brush, 2, rec.Height, rec.Width, y_base);

        }

    }

}