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(); pr足毂忍珩ivate 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