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
}
}
}以上是“C#如何绘制饼状图和柱状图”这篇文章的所有内容，感谢各位的阅读！希望分享的内容对大家有帮助，更多相关知识，欢迎关注亿速云行业资讯频道！
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