C#.NET WinForm绘制饼图、直方图、曲线图代码

1、引用

 

using System;

 

using System.Data;

 

using System.Windows.Forms;

 

using System.Runtime.InteropServices;

 

using System.IO;

 

using System.Text;

 

using System.Data.SqlClient;

 

using System.Threading;

 

using System.Net;

 

using System.Web.Services.Description;

 

using System.CodeDom;

 

using Microsoft.CSharp;

 

using System.CodeDom.Compiler;

 

using System.Collections.Generic;

 

using System.ComponentModel;

 

using System.Drawing;

 

using System.Security.Cryptography;

 

using System.Drawing.Imaging;

 

using System.Collections;

 

2、构建类库

 

public class Func

 

{

 

private static AChart chart = new AChart();

 

private static Object[] ChartColor ={ Color.Red, Color.Blue, Color.Orange, Color.Green,Color.Cyan, Color.Purple, Color.Coral, Color.Chocolate, Color.Gray, Color.Gold, Color.Lavender, Color.Linen, Color.Magenta, Color.Moccasin, Color.Navy, Color.Olive, Color.Peru, Color.Plum, Color.Purple, Color.Salmon, Color.Sienna, Color.Silver, Color.Tan, Color.Tomato, Color.Violet, Color.Turquoise, Color.Transparent};

 

/// <summary>

 

/// 填充饼图、直方图、曲线图到容器里

 

/// </summary>

 

/// <param name="chartTitle">标题</param>

 

/// <param name="control">容器(Panel,Form,TabPage)</param>

 

/// <param name="dataSet">对Table[0]进行操作，饼图取最前两列，第一列为名字，第二列为值。单数据直方图取最前两列，第一列为横轴每列名称，第二列为值。多数据直方图第一列为横轴父项名称，然后依次取前一列为横轴每列名称，后一列为值。曲线图取第一列为横轴每列名称，往后每列都代表一条曲线，列名为曲线名称。</param>

 

/// <param name="chartType">图表类型</param>

 

/// <param name="minNumber">刻度最小值，此参数对饼图无效</param>

 

/// <param name="maxNumber">刻度最大值，此参数对饼图无效</param>

 

/// <param name="scale">刻度值，此参数对饼图无效</param>

 

/// <param name="unit">值的单位，此参数对饼图无效</param>

 

public static void DrawingChart(string chartTitle, Control control, DataSet dataSet, ChartType chartType, int minNumber, int maxNumber, int scale,string unit)

 

{

 

DrawingChartInclude(chartTitle, control, dataSet, chartType, minNumber, maxNumber, scale,unit);

 

}

 

/// <summary>

 

/// 填充饼图到容器里

 

/// </summary>

 

/// <param name="chartTitle">标题</param>

 

/// <param name="control">容器(Panel,Form,TabPage)</param>

 

/// <param name="dataSet">对Table[0]进行操作，取最前两列，第一列为名字，第二列为值</param>

 

public static void DrawingChart(string chartTitle,Control control, DataSet dataSet)

 

{

 

DrawingChartInclude(chartTitle, control, dataSet, ChartType.Piegraph, 0, 0, 0,"");

 

}

 

private static void DrawingChartInclude(string chartTitle, Control control, DataSet dataSet, ChartType chartType, int minNumber, int maxNumber, int scale,string unit)

 

{

 

if (control.Height < 230 || control.Width < 230)

 

{

 

Func.Msg("容器宽度或长度设置过小！（宽度和长度必须>=230）");

 

return;

 

}

 

if (control.GetType().Name.Equals("Form") || control.GetType().Name.Equals("TabPage") || control.GetType().Name.Equals("GroupBox") || control.GetType().Name.Equals("Panel"))

 

{

 

for (int i = 0; i < chart.Count; i++)

 

{

 

if (control == (Control)chart[i].crtObj)

 

{

 

chart.RemoveChart(i);

 

break;

 

}

 

}

 

chart.AddChart(chartTitle, control, chartType, dataSet, minNumber, maxNumber, scale,unit);

 

control.Paint += new PaintEventHandler(control_Paint);

 

control.Disposed += new EventHandler(control_Disposed);

 

control.Refresh();

 

}

 

else

 

{

 

Func.Msg("该容器不是Form,TabPage,GroupBox,Panel类型！");

 

return;

 

}

 

}

 

static void control_Paint(object sender, PaintEventArgs e)

 

{

 

try

 

{

 

for (int i = 0; i < chart.Count; i++)

 

{

 

if (chart[i].crtType == ChartType.None)

 

{

 

break;

 

}

 

else if (chart[i].crtObj != sender)

 

{

 

continue;

 

}

 

int x = 0;

 

int y = 0;

 

int diameter = Math.Min(((Control)chart[i].crtObj).Height, ((Control)chart[i].crtObj).Width) - 100;

 

if (((Control)chart[i].crtObj).Width >= ((Control)chart[i].crtObj).Height)

 

{

 

x = (((Control)chart[i].crtObj).Width - ((Control)chart[i].crtObj).Height) / 2 + 50;

 

y = 50;

 

}

 

else

 

{

 

x = 50;

 

y = (((Control)chart[i].crtObj).Height - ((Control)chart[i].crtObj).Width) / 2 + 50;

 

}

 

Pen line = new Pen(Color.Black, 2);

 

SolidBrush linesb = new SolidBrush(Color.DarkGreen);

 

Rectangle rect = new Rectangle(x, y, diameter, diameter);

 

Pen title = new Pen(Color.Blue, 2);

 

SolidBrush B = new SolidBrush(Color.Blue);

 

StringFormat Ll = new StringFormat();

 

Ll.Alignment = System.Drawing.StringAlignment.Near;

 

int height = ((Control)chart[i].crtObj).Height - 20;

 

RectangleF RectTitle = new RectangleF(5, 5, diameter, diameter);

 

e.Graphics.DrawString(chart[i].crtTitle, new Font("Arial", 14), B, RectTitle, Ll);

 

#region 饼图

 

if (chart[i].crtType == ChartType.Piegraph)

 

{

 

float total = 0;

 

float fontWidth = 0;

 

for (int j = 0; j < chart[i].crtDataSet.Tables[0].Rows.Count; j++)

 

{

 

total += (float)Convert.ToDouble(chart[i].crtDataSet.Tables[0].Rows[j][1].ToString());

 

if (fontWidth < e.Graphics.MeasureString(chart[i].crtDataSet.Tables[0].Rows[j][0].ToString(), new Font("Arial", 10)).Width)

 

{

 

fontWidth = e.Graphics.MeasureString(chart[i].crtDataSet.Tables[0].Rows[j][0].ToString(), new Font("Arial", 10)).Width;

 

}

 

}

 

float next = 0;

 

for (int j = 0; j < chart[i].crtDataSet.Tables[0].Rows.Count; j++)

 

{

 

SolidBrush sb = new SolidBrush((Color)ChartColor[j % ChartColor.Length]);

 

float tmp = (float)(Convert.ToDouble(chart[i].crtDataSet.Tables[0].Rows[j][1].ToString()) / total * 100 * 3.6);

 

e.Graphics.FillPie(sb, rect, next, tmp);

 

RectTitle = new RectangleF(5, height, diameter, diameter);

 

B = new SolidBrush(Color.Black);

 

e.Graphics.DrawString(chart[i].crtDataSet.Tables[0].Rows[j][0].ToString(), new Font("Arial", 10), B, RectTitle, Ll);

 

RectTitle = new RectangleF(5 + (int)fontWidth + 2, height, 10, 12);

 

e.Graphics.FillRectangle(sb, RectTitle);

 

RectTitle = new RectangleF(x + diameter + 2, height, 10, 12);

 

e.Graphics.FillRectangle(sb, RectTitle);

 

RectTitle = new RectangleF(x + diameter + 14, height, diameter, diameter);

 

e.Graphics.DrawString(Convert.ToString(Math.Round((Convert.ToDouble(chart[i].crtDataSet.Tables[0].Rows[j][1].ToString()) / total * 100), 0)) + "%", new Font("Arial", 10), B, RectTitle, Ll);

 

height -= 20;

 

next += tmp;

 

}

 

}

 

#endregion

 

#region 直方图

 

else if (chart[i].crtType == ChartType.Histogram)

 

{

 

e.Graphics.DrawLine(line, x, y, x, y + diameter);

 

height = y + diameter - 12;

 

int scaleBS = diameter / ((chart[i].crtMaxNumber - chart[i].crtMinNumber) / chart[i].crtScale);

 

float fontWidth = e.Graphics.MeasureString(chart[i].crtMaxNumber.ToString(), new Font("Arial", 10)).Width;

 

for (int j = chart[i].crtMinNumber; j <= chart[i].crtMaxNumber; j += chart[i].crtScale)

 

{

 

RectangleF RectScaleHeightLine = new RectangleF(x - fontWidth - 1, height, diameter, diameter);

 

e.Graphics.DrawString(j.ToString(), new Font("Arial", 10), linesb, RectScaleHeightLine, Ll);

 

height -= scaleBS;

 

}

 

height = y + diameter;

 

int width = x + 10;

 

for (int j = 0; j < chart[i].crtDataSet.Tables[0].Rows.Count; j++)

 

{

 

if (chart[i].crtDataSet.Tables[0].Columns.Count <= 2)

 

{

 

SolidBrush sb = new SolidBrush((Color)ChartColor[j % ChartColor.Length]);

 

RectangleF RectScale = new RectangleF(width, height, diameter, diameter);

 

e.Graphics.DrawString(chart[i].crtDataSet.Tables[0].Rows[j][0].ToString(), new Font("Arial", 10), sb, RectScale, Ll);

 

double aa = Convert.ToDouble(chart[i].crtDataSet.Tables[0].Rows[j][1].ToString()) / chart[i].crtScale * scaleBS;

 

RectScale = new RectangleF(width, y + diameter - (int)aa, 20, (int)aa);

 

e.Graphics.FillRectangle(sb, RectScale);

 

RectScale = new RectangleF(width, y + diameter - (int)aa - 15, diameter, diameter);

 

e.Graphics.DrawString(chart[i].crtDataSet.Tables[0].Rows[j][1].ToString() + chart[i].crtUnit, new Font("Arial", 10), sb, RectScale);

 

}

 

else

 

{

 

int sbnum = 0;

 

RectangleF RectScale = new RectangleF(width, height + 24, diameter, diameter);

 

e.Graphics.DrawString(chart[i].crtDataSet.Tables[0].Rows[j][0].ToString(), new Font("Arial", 10), B, RectScale, Ll);

 

for (int k = 1; k < chart[i].crtDataSet.Tables[0].Columns.Count; k += 2)

 

{

 

SolidBrush sb = new SolidBrush((Color)ChartColor[sbnum % ChartColor.Length]);

 

sbnum++;

 

RectScale = new RectangleF(width, height + (sbnum % 2) * 12, diameter, diameter);

 

e.Graphics.DrawString(chart[i].crtDataSet.Tables[0].Rows[j][k].ToString(), new Font("Arial", 8), sb, RectScale, Ll);

 

double aa = Convert.ToDouble(chart[i].crtDataSet.Tables[0].Rows[j][k + 1].ToString()) / chart[i].crtScale * scaleBS;

 

RectScale = new RectangleF(width, y + diameter - (int)aa, 20, (int)aa);

 

e.Graphics.FillRectangle(sb, RectScale);

 

RectScale = new RectangleF(width, y + diameter - (int)aa - 15, diameter, diameter);

 

e.Graphics.DrawString(chart[i].crtDataSet.Tables[0].Rows[j][k + 1].ToString() + chart[i].crtUnit, new Font("Arial", 8), sb, RectScale);

 

width += 30;

 

}

 

}

 

if ((fontWidth + e.Graphics.MeasureString(chart[i].crtUnit, new Font("Arial", 10)).Width) >= 30)

 

{

 

width += (int)fontWidth + (int)e.Graphics.MeasureString(chart[i].crtUnit, new Font("Arial", 10)).Width + 10;

 

}

 

else

 

{

 

width += 30;

 

}

 

}

 

e.Graphics.DrawLine(line, x, y + diameter, width, y + diameter);

 

}

 

#endregion

 

#region 曲线图

 

else if (chart[i].crtType == ChartType.Polygram)

 

{

 

int width = x;

 

int scaleBS = diameter / ((chart[i].crtMaxNumber - chart[i].crtMinNumber) / chart[i].crtScale);

 

int scaleWidthBS = diameter / chart[i].crtDataSet.Tables[0].Rows.Count;

 

height = y + diameter - ((chart[i].crtMaxNumber - chart[i].crtMinNumber) / chart[i].crtScale) * scaleBS;

 

float fontWidth = e.Graphics.MeasureString(chart[i].crtMaxNumber.ToString(), new Font("Arial", 10)).Width;

 

for (int j = 0; j <= chart[i].crtDataSet.Tables[0].Rows.Count; j++)

 

{

 

e.Graphics.DrawLine(line, width, height, width, y + diameter);

 

width += scaleWidthBS;

 

}

 

height = y + diameter - 12;

 

for (int j = chart[i].crtMinNumber; j <= chart[i].crtMaxNumber; j += chart[i].crtScale)

 

{

 

e.Graphics.DrawLine(line, x, height + 12, x + scaleWidthBS * chart[i].crtDataSet.Tables[0].Rows.Count, height + 12);

 

RectangleF RectScaleHeightLine = new RectangleF(x - fontWidth - 1, height, diameter, diameter);

 

e.Graphics.DrawString(j.ToString(), new Font("Arial", 10), linesb, RectScaleHeightLine, Ll);

 

height -= scaleBS;

 

}

 

width = x;

 

height = y + diameter;

 

double nowheight = 0;

 

for (int j = 0; j < chart[i].crtDataSet.Tables[0].Rows.Count; j++)

 

{

 

height = y + diameter;

 

SolidBrush textsb = new SolidBrush(Color.Black);

 

RectangleF rectText = new RectangleF(width + scaleWidthBS, height + 2 + (j % 2) * 12, diameter, diameter);

 

e.Graphics.DrawString(chart[i].crtDataSet.Tables[0].Rows[j][0].ToString(), new Font("Arial", 10), textsb, rectText);

 

//

 

for (int k = 1; k < chart[i].crtDataSet.Tables[0].Columns.Count; k++)

 

{

 

Pen polygramLine = new Pen((Color)ChartColor[(k - 1) % ChartColor.Length]);

 

SolidBrush valueSB = new SolidBrush((Color)ChartColor[(k - 1) % ChartColor.Length]);

 

double aa = y + diameter;

 

if (j > 0)

 

{

 

aa = y + diameter - Convert.ToDouble(chart[i].crtDataSet.Tables[0].Rows[j - 1][k].ToString()) / chart[i].crtScale * scaleBS;

 

}

 

nowheight = y + diameter - Convert.ToDouble(chart[i].crtDataSet.Tables[0].Rows[j][k].ToString()) / chart[i].crtScale * scaleBS;

 

e.Graphics.DrawLine(polygramLine, width, (int)aa, width + scaleWidthBS, (int)nowheight);

 

RectangleF RectScale = new RectangleF(width + scaleWidthBS, (int)nowheight - 12, diameter, diameter);

 

e.Graphics.DrawString(chart[i].crtDataSet.Tables[0].Rows[j][k].ToString() + chart[i].crtUnit, new Font("Arial", 10), valueSB, RectScale);

 

}

 

width += scaleWidthBS;

 

}

 

fontWidth = 0;

 

for (int j = 1; j < chart[i].crtDataSet.Tables[0].Columns.Count; j++)

 

{

 

if (fontWidth < e.Graphics.MeasureString(chart[i].crtDataSet.Tables[0].Columns[j].ColumnName.ToString(), new Font("Arial", 10)).Width)

 

{

 

fontWidth = e.Graphics.MeasureString(chart[i].crtDataSet.Tables[0].Columns[j].ColumnName.ToString(), new Font("Arial", 10)).Width;

 

}

 

}

 

height = y + diameter;

 

for (int j = 1; j < chart[i].crtDataSet.Tables[0].Columns.Count; j++)

 

{

 

RectTitle = new RectangleF(5, height, diameter, diameter);

 

B = new SolidBrush(Color.Black);

 

SolidBrush valueSB = new SolidBrush((Color)ChartColor[(j - 1) % ChartColor.Length]);

 

e.Graphics.DrawString(chart[i].crtDataSet.Tables[0].Columns[j].ColumnName.ToString(), new Font("Arial", 10), B, RectTitle, Ll);

 

RectTitle = new RectangleF(5 + (int)fontWidth + 2, height, 15, 12);

 

e.Graphics.FillRectangle(valueSB, RectTitle);

 

height -= 20;

 

}

 

}

 

#endregion

 

break;

 

}

 

}

 

catch

 

{

 

return;

 

}

 

}

 

static void control_Disposed(object sender, EventArgs e)

 

{

 

for (int i=0;i<chart.Count;i++)

 

{

 

if ((Control)sender == (Control)chart[i].crtObj)

 

{

 

chart.RemoveChart(i);

 

break;

 

}

 

}

 

}

 

}

 

public class pChart

 

{

 

public Object crtObj;

 

public ChartType crtType;

 

public DataSet crtDataSet;

 

public string crtTitle = "";

 

public int crtMinNumber = 0;

 

public int crtMaxNumber = 0;

 

public int crtScale = 0;

 

public string crtUnit = "";

 

public pChart(string chartTitle,Object chartObject, ChartType chartType, DataSet chartDataSet, int minNumber, int maxNumber, int scale,string unit)

 

{

 

crtObj = chartObject;

 

crtType = chartType;

 

crtDataSet = chartDataSet;

 

crtTitle = chartTitle;

 

crtMinNumber = minNumber;

 

crtMaxNumber = maxNumber;

 

crtScale = scale;

 

crtUnit = unit;

 

}

 

}

 

public class AChart : System.Collections.CollectionBase

 

{

 

public AChart()

 

{ }

 

public void AddChart(string chartTitle, Object chartObject, ChartType chartType, DataSet chartDataSet, int minNumber, int maxNumber, int scale,string unit)

 

{

 

List.Add(new pChart(chartTitle,chartObject,chartType,chartDataSet,minNumber,maxNumber,scale,unit));

 

}

 

public void RemoveChart(int index)

 

{

 

if (index > Count - 1 || index < 0)

 

{

 

MessageBox.Show("Index not valid!");

 

}

 

else

 

{

 

List.RemoveAt(index);

 

}

 

}

 

public AChart Item

 

{

 

get

 

{

 

return this;

 

}

 

}

 

[System.Runtime.CompilerServices.IndexerName("item")]

 

public pChart this[int index]

 

{

 

get

 

{

 

return (pChart)List[index];

 

}

 

}

 

}

 

/// <summary>

 

/// 图表类型

 

/// </summary>

 

public enum ChartType

 

{

 

/// <summary>

 

/// 直方图

 

/// </summary>

 

Histogram,

 

/// <summary>

 

/// 饼图

 

/// </summary>

 

Piegraph,

 

/// <summary>

 

/// 曲线图

 

/// </summary>

 

Polygram,

 

/// <summary>

 

/// None

 

/// </summary>

 

None

 

}

3、测试用例：

 

private void button1_Click(object sender, EventArgs e)

 

{

 

DataSet ds = new DataSet();

 

ds = Func.DBbind("select '甲' as name,50 as value union all select '乙',60 union all select '丙',70 union all select '丁',80");

 

Func.DrawingChart("饼图测试", this.panel1, ds);

 

}

 

private void button2_Click(object sender, EventArgs e)

 

{

 

DataSet ds = new DataSet();

 

ds = Func.DBbind("select '甲' as name,50 as value union all select '乙',60 union all select '丙',70 union all select '丁',80");

 

Func.DrawingChart("直方图一测试", this.panel1, ds,ChartType.Histogram,0,100,10,"万");

 

}

 

private void button3_Click(object sender, EventArgs e)

 

{

 

DataSet ds = new DataSet();

 

ds = Func.DBbind("select '一月' as 月份,'甲' as name,50 as value,'乙' as name2,60 as value2 union all select '二月' as 月份,'甲',70,'乙',80");

 

Func.DrawingChart("直方图一测试", this.panel1, ds, ChartType.Histogram, 0, 100, 10, "万");

 

}

 

private void button4_Click(object sender, EventArgs e)

 

{

 

DataSet ds = new DataSet();

 

ds = Func.DBbind("select '一月' as 月份,50 as 甲,60 as 乙 union all select '二月', 60,40 union all select '三月',70,50 union all select '四月',30,60 union all select '五月',40,80 union all select '六月',70,90");

 

Func.DrawingChart("曲线图测试", this.panel1, ds, ChartType.Polygram, 0, 100, 10, "瓦");

 

}

4、实验结果展示