C# GDI 画 柱形图 折线图 饼状图

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;

namespace drawData
{
class DrawData
{
//绘制饼形图
static public Image DrawEllipse(int imageWidth,string DataName, string DataValue)
{
//string dataName = "a,b,c,d,e";
//string dataValue = "6,2,3,9,3";
string dataName = DataName;
string dataValue = DataValue;
int dataValueSum = 0;
int dataCnt = dataName.Split(',').Length;
float[] arrDataPercentage = new float[dataCnt];

string[] arrDataName = new string[dataCnt];
int[] arrDataValue = new int[dataCnt];

Random rand = new Random();
arrDataName = dataName.Split(',');
for (int i = 0; i < dataCnt; i++)
{
arrDataValue[i] = Convert.ToInt32(dataValue.Split(',')[i]);
dataValueSum += arrDataValue[i];
}

for (int i = 0; i < dataCnt; i++)//计算百分率
{
arrDataPercentage[i] = Convert.ToSingle(arrDataValue[i]) / dataValueSum;
}

//int imgWidth = 400, imgHeight = 600;
int imgWidth = imageWidth;
Image image = new Bitmap(imgWidth, imgWidth + 20 * dataCnt + 5);
//BorderStyle
Rectangle rectBorder = new Rectangle(1, 1, imgWidth - 3, imgWidth - 3);
Rectangle rectBorder2 = new Rectangle(1, imgWidth - 3, imgWidth - 3, 20 * dataCnt + 5);
Pen borderColor = new Pen(Color.Blue);
//PieStyle
SolidBrush[] arrbrush = new SolidBrush[dataCnt];
for (int i = 0; i < dataCnt; i++)
{
arrbrush[i] = new SolidBrush(Color.FromArgb(rand.Next(255), rand.Next(255), rand.Next(255)));
}

//startGraphics
Graphics g = Graphics.FromImage(image);
g.Clear(Color.White);
//GraphicsLine
g.DrawRectangle(borderColor, rectBorder);
g.DrawRectangle(borderColor, rectBorder2);
//GraphicsPie
float startPosition = 0.0f;
Rectangle rectPie = new Rectangle(rectBorder.Location.X + 2, rectBorder.Location.Y + 2, rectBorder.Width - 4, rectBorder.Height - 4);
for (int i = 0; i < dataCnt; i++)
{
g.FillPie(arrbrush[i], rectPie, startPosition, arrDataPercentage[i] * 360);
startPosition += arrDataPercentage[i] * 360;
}
//GraphicsString
for (int i = 0; i < dataCnt; i++)
{
g.FillRectangle(arrbrush[i], new Rectangle(20, i * 20 + rectBorder.Width + 5, 15, 15));
string str = string.Format("{0}——{1:p}", arrDataName[i], arrDataPercentage[i]);
g.DrawString(str, new Font("", 9), arrbrush[i], new Point(40, i * 20 + rectBorder.Width + 5));
}

return image;
}

//绘制折线图
//例如DrawData.DrawPolyonLine(pictureBox1.Width,pictureBox1.Height ,"2000-3000年比例","6,8,10,12,14,16,18,20,22","个","1,2,3,4,5,6,7,8,9,10,11,12","年","12,6,8,10,12,14,16,18,20,2,11,11");
static public Image DrawPolyonLine(int ImgWidth, int ImgHeight, string Title, string LeftName,int LeftMinNum,int LeftAvgNum, string BottomName, string Data)
{
int imgWidth = 600, imgHeight = 400;
string title = "2000-3000年比例";
string leftName = "6个,8个,10个,12个,14个,16个,18个,20个,22个";

string bottomName = "1年,2年,3年,4年,5年,6年,7年,8年,9年,10年,11年,12年";

string data = "12,6,8,10,12,14,16,18,20,2,11,11";
int leftMinNum = 6;
int leftAvgNum = 2;

imgWidth = ImgWidth;
imgHeight = ImgHeight;
title = Title;
leftName = LeftName;
leftMinNum = LeftMinNum;
leftAvgNum = LeftAvgNum;
bottomName = BottomName;

data = Data;

int horizontalLineCnt = leftName.Split(',').Length + 1;
int verticalLineCnt = bottomName.Split(',').Length;

int[] xPosition = new int[verticalLineCnt];
int[] yPosition = new int[horizontalLineCnt];

string[] arrLeftName = leftName.Split(',');
string[] arrBottomName = bottomName.Split(',');
string[] arrdata = data.Split(',');

Image image = new Bitmap(imgWidth, imgHeight);
Graphics g = Graphics.FromImage(image);
g.Clear(Color.White);
//标题
SolidBrush brushStr = new SolidBrush(Color.Blue);
Font fontTitle = new Font("Arial", 20);
SizeF sf = g.MeasureString(title, fontTitle);
g.DrawString(title, new Font("Arial", 20), brushStr, new Point((int)(image.Width - sf.Width) / 2, 0));
//确定背景线的位置
int lineWidth = image.Width * 8 / 10;
int lineHeight = image.Height * 8 / 10;
Point startPosition = new Point(image.Width / 10, image.Height / 10);
Point endPostion = new Point(image.Width * 9 / 10, image.Height * 9 / 10);
int horizontalBetween = lineHeight / horizontalLineCnt;
int verticalBetween = lineWidth / verticalLineCnt;
//确定x点做标
for (int h = 0; h < horizontalLineCnt; h++)
{
yPosition[h] = (h + 1) * horizontalBetween + startPosition.Y;
}
for (int v = 0; v < verticalLineCnt; v++)
{
xPosition[v] = (v) * verticalBetween + startPosition.X;
}
//画背景线
Pen pen = new Pen(Color.Blue);
for (int h = 0; h < horizontalLineCnt; h++)
{
g.DrawLine(pen, startPosition.X, yPosition[h], startPosition.X + lineWidth, yPosition[h]);
lineHeight = (h + 1) * horizontalBetween;
}

for (int v = 0; v < verticalLineCnt; v++)
{
g.DrawLine(pen, xPosition[v], startPosition.Y, xPosition[v], startPosition.Y + lineHeight);
}
//画汉字
Font font = new Font("arial", 9);
for (int s = 0; s < arrBottomName.Length; s++)
{
string str = arrBottomName[s];
g.DrawString(str, font, Brushes.Blue, new Point(xPosition[s] + 5, endPostion.Y + 5));
}
for (int s = 0; s < arrLeftName.Length; s++)
{
int cnt = arrLeftName.Length - 1;
string str = arrLeftName[cnt - s];
int ix = startPosition.X - 5 - (int)g.MeasureString(str, font).Width;
int iy = yPosition[s] - 15;

g.DrawString(str, font, Brushes.Blue, new Point(ix, iy));
}

//画折线效果
//数据每一个为x像素

float fdataHeight = horizontalBetween / leftMinNum;
float fdataAverageHeight = horizontalBetween / leftAvgNum;
Point[] arrDataPoint = new Point[arrdata.Length];
for (int l = 0; l < arrBottomName.Length; l++)
{
arrDataPoint[l].X = xPosition[l];
if (Convert.ToInt32(arrdata[l]) > LeftMinNum)
{

arrDataPoint[l].Y = yPosition[horizontalLineCnt - 1] - (int)((Convert.ToInt32(arrdata[l]) - leftMinNum) * fdataAverageHeight + horizontalBetween);
}
else
{
arrDataPoint[l].Y = yPosition[horizontalLineCnt - 1] - (int)(Convert.ToInt32(arrdata[l]) * fdataHeight);
}
}
g.DrawLines(Pens.YellowGreen, arrDataPoint);
return image;
}
//绘制柱形图
//例如: DrawData.DrawPillar(pictureBox1.Width, pictureBox1.Height, "2000-3000年比例", "1,2,3,4,5", "23,11,44,22,11");
static public Image DrawPillar(int ImgWidth, int ImgHeight, string Title, string BottomName, string Data)
{
int imgWidth = 600, imgHeight = 400;
string title = "2000-3000年比例";
string leftName = "0%,10%,20%,30%,40%,50%,60%,70%,80%,90%,100%";
string bottomName = "1,2,3,4,5,6,7,8,9,10,11,12";
string data = "12,6,8,10,12,14,16,18,20,2,11,11";

imgWidth = ImgWidth;
imgHeight = ImgHeight;
title = Title;
bottomName = BottomName;
data = Data;

int dataSum = 0;

float[] arrDataPercentage = new float[data.Split(',').Length];

int horizontalLineCnt = leftName.Split(',').Length;
int verticalLineCnt = data.Split(',').Length;

int[] xPosition = new int[verticalLineCnt];
int[] yPosition = new int[horizontalLineCnt];

string[] arrLeftName = leftName.Split(',');
string[] arrBottomName = bottomName.Split(',');
string[] arrdata = data.Split(',');

foreach (string s in arrdata)
{
dataSum += Convert.ToInt32(s);

}
for (int d = 0; d < arrdata.Length; d++)
{
arrDataPercentage[d] = Convert.ToSingle(arrdata[d]) / dataSum;

}

Image image = new Bitmap(imgWidth, imgHeight);
Graphics g = Graphics.FromImage(image);
g.Clear(Color.White);
//标题
SolidBrush brushStr = new SolidBrush(Color.Blue);
Font fontTitle = new Font("Arial", 20);
SizeF sf = g.MeasureString(title, fontTitle);
g.DrawString(title, new Font("Arial", 20), brushStr, new Point((int)(image.Width - sf.Width) / 2, 0));
//确定背景线的位置
int lineWidth = image.Width * 8 / 10;
int lineHeight = image.Height * 8 / 10;
Point startPosition = new Point(image.Width / 10, image.Height / 10);
Point endPostion = new Point(image.Width * 9 / 10, image.Height * 9 / 10);
int horizontalBetween = lineHeight / horizontalLineCnt;
int verticalBetween = lineWidth / verticalLineCnt;
//确定x点做标
for (int h = 0; h < horizontalLineCnt; h++)
{
yPosition[h] = (h + 1) * horizontalBetween + startPosition.Y;
}
for (int v = 0; v < verticalLineCnt; v++)
{
xPosition[v] = (v) * verticalBetween + startPosition.X;
}
//画背景线
Pen pen = new Pen(Color.Blue);
for (int h = 0; h < horizontalLineCnt; h++)
{
g.DrawLine(pen, startPosition.X, yPosition[h], startPosition.X + lineWidth, yPosition[h]);
lineHeight = (h + 1) * horizontalBetween;
}

for (int v = 0; v < verticalLineCnt; v++)
{
g.DrawLine(pen, xPosition[v], startPosition.Y, xPosition[v], startPosition.Y + lineHeight);
}
//画汉字
Font font = new Font("arial", 9);
for (int s = 0; s < verticalLineCnt; s++)
{
string str = arrBottomName[s];
g.DrawString(str, font, Brushes.Blue, new Point(xPosition[s] + 5, endPostion.Y + 5));
}
for (int s = 0; s < arrLeftName.Length; s++)
{
int cnt = arrLeftName.Length - 1;
string str = arrLeftName[cnt - s];
int ix = startPosition.X - 5 - (int)g.MeasureString(str, font).Width;
int iy = yPosition[s] - 10;

g.DrawString(str, font, Brushes.Blue, new Point(ix, iy));
}

//画柱形图
//数据每一个为x像素
float fdataWidth = verticalBetween / 2;
for (int i = 0; i < verticalLineCnt; i++)
{
int rectHeight = (int)(arrDataPercentage[i] * 100 * horizontalBetween / 10);
g.FillRectangle(Brushes.Blue, xPosition[i] + (int)fdataWidth / 2, yPosition[horizontalLineCnt - 1] - rectHeight, fdataWidth, rectHeight);
}
return image;
}
}
}