.net c#获取磁盘空间并画饼状图展示

以饼状图来展示当前电脑的磁盘空间

1.获取磁盘信息,想添加 System.Management 的引用.

引用后,读取当前的磁盘

            SelectQuery selectQuery = new SelectQuery("select * from win32_logicaldisk");
            ManagementObjectSearcher searcher = new ManagementObjectSearcher(selectQuery);
            foreach (ManagementObject disk in searcher.Get())
            {
                zcmb.Items.Add(disk["Name"].ToString());
            }
            if (zcmb.Items.Count > 0) { zcmb.SelectedIndex = 0; }

2.在当前控件,创建绘画区域进行绘画

获取Graphics区域,创建Pen画笔,然后画数据

        private void zcmb_SelectedIndexChanged(object sender, EventArgs e)
        {
            string name = zcmb.Text;
            if (string.IsNullOrEmpty(name)) { return; }
            DriveInfo dinfo = new DriveInfo(name);
            float tsize = dinfo.TotalSize;
            float fsize = dinfo.TotalFreeSpace;
            int y = zcmb.Location.Y + 45;
            Graphics graphics = this.CreateGraphics();
            graphics.Clear(Color.White);
            Pen pen1 = new Pen(Color.Red);
            Brush brush1 = new SolidBrush(Color.Green);
            Brush brush2 = new SolidBrush(Color.Blue);
            Font font1 = new Font("Courier New", 16, FontStyle.Bold);
            Font font2 = new Font("宋体", 9);
            graphics.DrawString("磁盘容量情况", font1, brush1, new Point(60, y));
            float angle1 = Convert.ToSingle((360 * (Convert.ToSingle(fsize / 100000000000) / Convert.ToSingle(tsize / 100000000000))));
            float angle2 = Convert.ToSingle((360 * (Convert.ToSingle((tsize - fsize) / 100000000000) / Convert.ToSingle(tsize / 100000000000))));
            graphics.FillPie(brush1, 60, y + 30, 150, 150, 0, angle1);
            graphics.FillPie(brush2, 60, y + 30, 150, 150, angle1, angle2);
            graphics.DrawRectangle(pen1, 30, y + 185, 200, 50);
            graphics.FillRectangle(brush1, 35, y + 195, 20, 10);
            graphics.DrawString("剩余容量:" + FormatFileSize(dinfo.TotalFreeSpace), font2, brush1, 55, y + 195);
            graphics.FillRectangle(brush2, 35, y + 215, 20, 10);
            graphics.DrawString("已用容量:" + FormatFileSize(dinfo.TotalSize - dinfo.TotalFreeSpace), font2, brush2, 55, y + 215);
        }

实现效果如下: