给你完整做了一个，留下email，采纳本回答，发给你

其他人如果也需要：https://download.csdn.net/download/caozhy/11296918

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

namespace Q768543
{
    public partial class CycleProgressBar : UserControl
    {
        public CycleProgressBar()
        {
            InitializeComponent();
            this.DoubleBuffered = true;
        }

        private double _percentage = 0;


        public double Percentage 
        {
            get { return _percentage; }
            set { _percentage = value; this.Refresh(); }
        }

        public string Caption
        {
            get { return base.Text; }
            set { base.Text = value; this.Refresh(); }
        }

        private void CycleProgressBar_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            float wid = 20;
            float x = 0;
            float y = 0;
            float w = this.Width - x - wid;
            float footer = 60;
            float h = this.Height - y - wid - footer;
            if (w > h)
            {
                w = h;
                x = (this.Width - w - wid) / 2;
            }
            else
            {
                h = w;
                y = (this.Height - footer - h - wid) / 2;
            }       
            Pen pen1 = new Pen(Color.Blue, wid);
            Pen pen2 = new Pen(Color.Gray, wid);
            g.DrawEllipse(pen2, x + wid / 2.0f, y + wid / 2.0f, w, h);
            g.DrawArc(pen1, x + wid / 2.0f, y + wid / 2.0f, w, h, -90, (float)(Percentage * 360 / 100.0));
            g.FillEllipse(new SolidBrush(Color.White), x + wid / 2.0f, y + wid / 2.0f, w, h);
            var size = g.MeasureString(Percentage.ToString() + " %", this.Font);
            //g.DrawString(Percentage.ToString() + " %", this.Font, new SolidBrush(Color.Black), 
            //    x + wid / 2.0f + w / 2.0f - size.Width / 2.0f, y + wid / 2.0f + h / 2.0f - size.Height / 2.0f);
            g.DrawString(Percentage.ToString() + " %", this.Font, new SolidBrush(Color.Black),
                Width / 2.0f - size.Width / 2.0f, y + wid / 2.0f + h / 2.0f - size.Height / 2.0f);
            size = g.MeasureString(Caption, this.Font);
            g.DrawString(Caption, this.Font, new SolidBrush(Color.Black),
                Width / 2.0f - size.Width / 2.0f, Height - footer / 2.0f - size.Height / 2.0f);
        }
    }
}

以上封装一个控件，代码你无需管，调用在下面，非常简单：

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

namespace Q768543
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.cycleProgressBar1.Font = new Font(this.Font.Name, 15);
            this.cycleProgressBar1.Percentage = 100;
            this.cycleProgressBar1.Caption = "电量";
            this.cycleProgressBar2.Font = new Font(this.Font.Name, 15);
            this.cycleProgressBar2.Percentage = 100;
            this.cycleProgressBar2.Caption = "库存";
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (this.cycleProgressBar1.Percentage > 0)
                cycleProgressBar1.Percentage -= 1.0;
            if (this.cycleProgressBar2.Percentage > 0)
                cycleProgressBar2.Percentage -= 0.5;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Enabled = !timer1.Enabled;
        }
    }
}