C#如何绘制饼状图和柱状图

这篇文章主要介绍C#如何绘制饼状图和柱状图，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！

具体内容如下

#代码如下：

using System;using System.Collections;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Data.SqlClient;using System.Drawing;using System.Drawing.Drawing2D;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace TEST3._2{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void Form1_Load(object sender, EventArgs e)        {            BarMap();        }        private void BitMap()//饼状图        {            int[] saleNum = { 300, 500, 400 };            int sum = 0, threeNum = 0, fourNum = 0, fiveNum = 0;            for (int i = 0; i < saleNum.Length; i++)            {                sum += saleNum[i];                if (i == 0)                    threeNum = saleNum[0];                else if (i == 1)                    fourNum = saleNum[1];                else                    fiveNum = saleNum[2];            }            int height = pictureBox1.Height, width = pictureBox1.Width;            Bitmap bitmap = new Bitmap(width, height);            Graphics g = Graphics.FromImage(bitmap);            g.Clear(Color.White);            Pen pen1 = new Pen(Color.Red);            Brush brush2 = new SolidBrush(Color.PowderBlue);            Brush brush3 = new SolidBrush(Color.Blue);            Brush brush4 = new SolidBrush(Color.Wheat);            Brush brush5 = new SolidBrush(Color.Orange);            Font font1 = new Font("Couriter New", 16, FontStyle.Bold);            Font font2 = new Font("Couriter New", 10);            g.FillRectangle(brush2, 0, 0, width, height);            g.DrawString("每月销售占比饼状图", font1, brush3, new Point(70, 20));            int piex = 100, piey = 60, piew = 200, pieh = 200;            float angle1 = Convert.ToSingle((360 / Convert.ToSingle(sum)) * Convert.ToSingle(threeNum));            float angle2 = Convert.ToSingle((360 / Convert.ToSingle(sum)) * Convert.ToSingle(fourNum));            float angle3 = Convert.ToSingle((360 / Convert.ToSingle(sum)) * Convert.ToSingle(fiveNum));            g.FillPie(brush3, piex, piey, piew, pieh, 0, angle1);            g.FillPie(brush4, piex, piey, piew, pieh, angle1, angle2);            g.FillPie(brush5, piex, piey, piew, pieh, angle1 + angle2, angle3);            g.DrawRectangle(pen1, 50, 300, 310, 130);            g.FillRectangle(brush3, 90, 320, 20, 10);            g.DrawString(string.Format("3月份销量占比：{0:P2}", Convert.ToSingle(threeNum) / Convert.ToSingle(sum)), font2, brush3, 120, 320);            g.FillRectangle(brush4, 90, 360, 20, 10);            g.DrawString(string.Format("4月份销量占比：{0:P2}", Convert.ToSingle(fourNum) / Convert.ToSingle(sum)), font2, brush3, 120, 360);            g.FillRectangle(brush5, 90, 400, 20, 10);            g.DrawString(string.Format("5月份销量占比：{0:P2}", Convert.ToSingle(fiveNum) / Convert.ToSingle(sum)), font2, brush3, 120, 400);                       this.groupBox1.Text = "饼状图";            this.pictureBox1.Width = bitmap.Width;            this.pictureBox1.Height = bitmap.Height;            this.pictureBox1.BackgroundImage = bitmap;        }        private void BarMap()//柱状图        {            int[] saleNum = { 300, 500, 400 };            int sum = saleNum[0]+ saleNum[1]+ saleNum[2];            float[] Y_Num ={ Convert.ToSingle(saleNum[0]) / Convert.ToSingle(sum),Convert.ToSingle(saleNum[1]) / Convert.ToSingle(sum),                    Convert.ToSingle(saleNum[2]) / Convert.ToSingle(sum) };            int height = pictureBox1.Height, width = pictureBox1.Width;            Bitmap image = new Bitmap(width, height);            //创建Graphics类对象            Graphics g = Graphics.FromImage(image);            try            {                //清空图片背景色                g.Clear(Color.White);                Font font = new Font("Arial", 10, FontStyle.Regular);                Font font1 = new Font("宋体", 20, FontStyle.Bold);                LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height),Color.Blue, Color.BlueViolet, 1.2f, true);                Font font2 = new System.Drawing.Font("Arial", 10, FontStyle.Bold);                SolidBrush mybrush = new SolidBrush(Color.Red);                SolidBrush mybrush3 = new SolidBrush(Color.Green);                Pen mypen = new Pen(brush, 1);                //绘制线条                //绘制横向线条                int x = 100;                Pen mypen1 = new Pen(Color.Blue, 2);                x = 60;                g.DrawLine(mypen1, x, 0, x, 300);                //绘制纵向线条                int y = 0;                for (int i = 0; i <11; i++)                {                    g.DrawLine(mypen, 45, y, 60, y);                    y = y + 30;                }               g.DrawLine(mypen1, 60, y-30, 620, y-30);                //x轴                String[] n = { "3月份", "4月份", "5月份"};                x = 100;                for (int i = 0; i < 3; i++)                {                    g.DrawString(n[i].ToString(), font, Brushes.Blue, x, 300); //设置文字内容及输出位置                    Console.WriteLine(300 - Y_Num[i] * 100 * 3);                    g.FillRectangle(mybrush, x, 300 - Y_Num[i] * 100 * 3, 20, Y_Num[i] * 100 * 3);                    g.DrawString(Y_Num[i].ToString(), font2, Brushes.Green, x, 300 - Y_Num[i] * 100 * 3 - 15);                    x = x + 100;                }                //y轴                String[] m = {"0","0.10","0.20", "0.30", "0.40", "0.50", "0.60", "0.70", " 0.80"," 0.90", " 1.00" };                y = 0;                for (int i = 10; i >= 0; i--)                {                    g.DrawString(m[i].ToString(), font, Brushes.Blue, 20, y); //设置文字内容及输出位置                    y = y + 30;                }                //绘制标识                Font font3 = new System.Drawing.Font("Arial", 10, FontStyle.Regular);                g.DrawRectangle(new Pen(Brushes.Blue), 170, 390, 250, 50); //绘制范围框                g.FillRectangle(Brushes.Red, 200, 410, 20, 10); //绘制小矩形                g.DrawString("月销量占比", font3, Brushes.Red, 292, 408);                this.button1.Text = "查看饼状图";                this.groupBox1.Text = "柱状图";                this.pictureBox1.Width = image.Width;                this.pictureBox1.Height = image.Height;                this.pictureBox1.BackgroundImage = image;             }            catch { }          }        private void Button1_Click(object sender, EventArgs e)        {            BitMap();            this.button1.Visible =false;//隐藏button        }         }}

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