应用GDI+生成3D柱图的程序
按照老板的要求做的生成3D柱图的程序
使用方法如下：
如：在窗口Form1加上一个pictureBox1控件
效果如图所示：
1
using System;
2using System.Collections;
3using System.Drawing;
4using System.Drawing.Imaging;
5using System.Drawing.Drawing2D;
6using System.Drawing.Text;
7
8namespace Chart
9
{
10
/// <summary>
11
/// ColumnChart 的摘要说明。
12
/// </summary>
13 public class ColumnChart
14 {
15 public int Width = 420; //图形的宽
16 public int Height = 200; //图形的高
17 public int iLeftTopX = 35; //数据区左上角的X
18 public int iLeftTopY = 35; //数据区左上角的Y
19 public float iSectY = 100; //数据
20 public Color BackColor = Color.White;
21 public int iBottomHeight = 10;
22 public float iLegWidth = 80;
23 public int iGroupNum = 1;
24
25 public Color[] ColorArray
26 = new Color[]{Color.Blue,Color.Red,Color.Yellow,Color.Purple,Color.Orange,
27 Color.Brown,Color.Gray,Color.Maroon,Color.AliceBlue,
28 Color.AntiqueWhite,Color.Aquamarine, Color.Azure,
29 Color.YellowGreen,Color.Bisque,Color.Black,Color.BlanchedAlmond,
30 Color.BlueViolet,Color.BurlyWood,Color.CadetBlue,Color.Chartreuse,Color.Chocolate};
31
32 private ArrayList chartValues = new ArrayList(); //点数组
33 private float iYdivs = 10; //y轴分成iYdivs等份
34 private string strUnit = "";
35 private string strTitle = "";
36 private float iBottom; //最小点的在Y轴上的位置
37 private float iSymbolLeg; //标记的x轴开始位置
38 private float iValueWidth; // 数据区的宽
39 private float iValueHeight; // 数据区的高
40 private float iValueMaxY = 0; //Y轴最大值
41 private float iValueMinY = 0; //Y轴最小值
42 private float iPointZeroX = 0;
43 private float iPointZeroY = 0; //坐标零点，如果没有负值，就是最小点的坐标
44 private float iDeep = 10; //柱子的深度
45 private int iWidth = 40; //每个柱占据的宽度，包括它右边的空格在内
46
47 private Graphics objGraphics;
48 /// <summary>
49 /// 标题
50 /// </summary>
51 public string Title
52 {
53 get
54 {
55 return strTitle;
56 }
57 set
58 {
59 strTitle = value;
60 }
61 }
62
63
64 /// <summary>
65 /// Y轴的数值的单位
66 /// </summary>
67 public string Unit
68 {
69 get
70 {
71 return strUnit;
72 }
73 set
74 {
75 strUnit = value;
76 }
77 }
78
79
80 class dataPole
81 {
82 public float Value;
83 public string Name;
84 public string Type;
85 public float ValuePoint;
86 }
87
88 /// <summary>
89 /// 向图中添加一个值
90 /// </summary>
91 /// <param name="myValue">值的大小</param>
92 /// <param name="myName">值的名称</param>
93 public void AddValue(float myValue, string myName)
94 {
95 dataPole myData = new dataPole();
96 myData.Value = myValue;
97 myData.Name = myName;
98 myData.Type = myName;
99 myData.ValuePoint = 0;
100
101 chartValues.Add(myData);
102 }
103
104 /// <summary>
105 /// 向图中添加一个值
106 /// </summary>
107 /// <param name="myValue">值的大小</param>
108 /// <param name="myName">值的名称，写在右方</param>
109 /// <param name="myType">值的类型，如一月二月，写在下方</param>
110 public void AddValue(float myValue, string myName, string myType)
111 {
112 dataPole myData = new dataPole();
113 myData.Value = myValue;
114 myData.Name = myName;
115 myData.Type = myType;
116 myData.ValuePoint = 0;
117
118 chartValues.Add(myData);
119 }
120
121 /// <summary>
122 ///
123 /// </summary>
124 public ColumnChart(int myWidth, int myHeight, Graphics myGraphics ,string myUnit,string myTitle)
125 {
126 strTitle = myTitle;
127 strUnit = myUnit;
128
129 Width = myWidth;
130 Height = myHeight;
131
132 objGraphics = myGraphics;
133 }
134
135 /// <summary>
136 /// 计算一些需要用到的值
137 /// </summary>
138 protected void CalculateValue()
139 {
140 float iRightLegWidth = 5;
141 foreach(dataPole myPole in chartValues)
142 {
143 SizeF size = objGraphics.MeasureString(myPole.Name,new Font("宋体", 9));
144 if(iRightLegWidth < size.Width + 5 )
145 {
146 iRightLegWidth = size.Width + 5;
147 }
148 }
149 iLegWidth = iRightLegWidth + 25;
150 iSymbolLeg = Width - iLegWidth;
151
152 if(this.iGroupNum ==1)
153 {
154 iBottomHeight = 10;
155 }
156 else
157 {
158 iBottomHeight = 25;
159 }
160 iBottom = Height - iBottomHeight;
161
162 iValueWidth = iSymbolLeg - iLeftTopX - iDeep - 10;
163 iValueHeight = iBottom - iLeftTopY;
164 //-------------------------------------------------------------------------------------
165 //算最大值
166 foreach(dataPole myPole in chartValues)
167 {
168 for(;iValueMaxY < myPole.Value;iValueMaxY = iValueMaxY + iSectY);
169 }
170 //算最小值iValueMinY
171 iValueMinY = iValueMaxY;
172 foreach(dataPole myPole in chartValues)
173 {
174 for(;iValueMinY > myPole.Value;iValueMinY = iValueMinY - iSectY);
175 }
176 //以上两个最大最小值是用来计算iYdivs的
177
178 iYdivs = (iValueMaxY - iValueMinY)/iSectY;
179 float fltemp = iSectY;
180 for(;iYdivs > 10;iSectY += fltemp)
181 {
182 iYdivs = (iValueMaxY - iValueMinY)/iSectY;
183 }
184
185 //因为iSectY的值发生变化，所以要重新计算最大最小值。
186 iValueMaxY = 0;
187 //算最大值
188 foreach(dataPole myPole in chartValues)
189 {
190 for(;iValueMaxY < myPole.Value;iValueMaxY = iValueMaxY + iSectY);
191 }
192 //算最小值iValueMinY
193 iValueMinY = iValueMaxY;
194 foreach(dataPole myPole in chartValues)
195 {
196 for(;iValueMinY > myPole.Value;iValueMinY = iValueMinY - iSectY);
197 }
198 //--------------------------------------------------------------------------------------------
199
200 //最大值加上一段，这样不会顶在上面，留有一点余地
201 iValueMaxY += iSectY;
202 iPointZeroX = iLeftTopX;
203 if(iValueMinY < 0 )
204 { //最小值减去一段，这样最短的不会只有一点，稍长一点，好看一些，
205 //而且如果有负数，这样不会顶到下面
206 iValueMinY -= iSectY;
207 iPointZeroY = iLeftTopY + iValueHeight*(iValueMaxY/(iValueMaxY - iValueMinY));
208 }
209
210 else if(iValueMinY > 0 )
211 {
212 iValueMinY -= iSectY;
213 iPointZeroY = iBottom;
214 }
215 else
216 { //如果iSectY大于所有值中的最小值，就会出现iValueMinY等于0的情况，
217 //这个时候如果再将iValueMinY减去iSectY
218 //就会得到iValueMinY为负数，应该屏蔽这种情况
219 iPointZeroY = iBottom;
220 }
221
222 iYdivs = (iValueMaxY - iValueMinY)/iSectY;
223
224 //iWidth是每个数值的宽度
225 if(chartValues.Count!=0)
226 {
227 iWidth = (int)(iValueWidth - 40)/chartValues.Count;
228 }
229
230 if(iWidth > 40)
231 {
232 iWidth = 40;
233 }
234 else if(iWidth < 5)
235 {
236 iWidth = 5;
237 }
238
239 if(iDeep > (iWidth-iDeep)*7/10)
240 {
241 iDeep = (iWidth-iDeep)*7/10;
242 }
243
244
245 //得到相对应的值需要在图上画出的点数。画图的时候用ValuePoint，
246 //取值的时候用Value，取名字的时候用Name
247 if(iValueMinY >= 0)
248 {
249 foreach(dataPole myPole in chartValues)
250 {
251 myPole.ValuePoint = System.Convert.ToInt32(iValueHeight * (myPole.Value - iValueMinY) / (iValueMaxY - iValueMinY));
252 }
253 }
254 else
255 {
256 foreach(dataPole myPole in chartValues)
257 {
258 myPole.ValuePoint = System.Convert.ToInt32((iPointZeroY- iLeftTopY) * (myPole.Value) / (iValueMaxY));
259 }
260 }
261
262 }
263
264 /// <summary>
265 /// 画图；
266 /// </summary>
267 public void Draw()
268 {
269 CalculateValue();
270
271 int i;
272
273 //objGraphics.ScaleTransform(1,1);
274 //设定平滑为无锯齿
275 //objGraphics.SmoothingMode = SmoothingMode.AntiAlias;
276 objGraphics.CompositingQuality = CompositingQuality.GammaCorrected;
277 objGraphics.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
278
279 //清除整个绘图面并以指定White为背景色进行填充。
280 objGraphics.Clear(BackColor);
281
282 //----------绘制统计图标题--------------------------------------------------------------------------------------------
283 //在画布（objBitMap对象），用指定的Brush（画笔）对象和Font（字体）对象绘制统计图标题。
284 SizeF size = objGraphics.MeasureString(strTitle,new Font("宋体", 12, FontStyle.Bold));
285 objGraphics.DrawString(strTitle, new Font("宋体", 12, FontStyle.Bold), Brushes.Black, (iSymbolLeg - size.Width)/2, 10);
286
287 //------------画横线，方便用户查看-----------------------------------------------------------------------------------------------
288 float x = iLeftTopX,y=0;
289 string myLabel;
290 Pen SilverPen = new Pen(Color.Silver, 1);
291 Pen BlackPen = new Pen(Color.Black, 1);
292 for(i = 0;i<=iYdivs;i++)
293 {
294 y = iBottom - (i * iValueHeight / iYdivs);
295 myLabel = System.Convert.ToString(Math.Round(iValueMinY + ((iValueMaxY - iValueMinY) * i / iYdivs),2));
296 //写左边的坐标的值
297 objGraphics.DrawString(myLabel, new Font("宋体", 9), new SolidBrush(Color.Black), 5, y - 6);
298
299 //画线
300 objGraphics.DrawLine(SilverPen, x, y, x+iDeep , y -iDeep);
301 objGraphics.DrawLine(SilverPen, x +iDeep , y -iDeep , x + iValueWidth +iDeep, y -iDeep);
302 objGraphics.DrawLine(BlackPen, x-2, y, x, y);
303 }
304 //写出y轴的单位
305 myLabel = "单位：" + strUnit;
306 objGraphics.DrawString(myLabel, new Font("宋体", 9), new SolidBrush(Color.Black), 3, y - iDeep -13);
307 //-----------------------------------------------------------------------------------------------------------------------------------
308
309 //--------画图形区域---------------------------------------------------------------------------------------------------------
310 //这四个点是左边的坐标面
311 PointF p1 = new PointF(iLeftTopX,iLeftTopY);
312 PointF p2 = new PointF(iLeftTopX+ iDeep, iLeftTopY - iDeep);
313 PointF p3 = new PointF(iLeftTopX,iLeftTopY + iValueHeight);
314 PointF p4 = new PointF(iLeftTopX +iDeep,iLeftTopY + iValueHeight -iDeep);
315 //这四个点是0点的横的坐标面
316 PointF p5 = new PointF(iPointZeroX,iPointZeroY);
317 PointF p6 = new PointF(iPointZeroX + iDeep,iPointZeroY - iDeep);
318 PointF p7 = new PointF(iPointZeroX + iValueWidth,iPointZeroY);
319 PointF p8 = new PointF(iPointZeroX + iValueWidth + iDeep,iPointZeroY -iDeep);
320
321 PointF[] ptsArray1 ={p1, p3, p4, p2};
322 PointF[] ptsArray2 ={p5, p7, p8, p6};
323
324 //左边的坐标面
325 objGraphics.DrawPolygon(BlackPen,ptsArray1);
326 //0点的横的坐标面
327 objGraphics.DrawPolygon(BlackPen,ptsArray2);
328 //数据区
329 objGraphics.DrawRectangle(BlackPen, iLeftTopX+ iDeep, iLeftTopY - iDeep, iValueWidth, iValueHeight);
330 //----------------------------------------------------------------------------------------------------------------------------------
331
332 //----------创建图例文字--------------------------------------------------------------------------------------------------------
333 PointF symbolLeg = new PointF(iSymbolLeg, 5);
334 PointF descLeg = new PointF(iSymbolLeg + 25, 2);
335 //画出图例。
336 //当iGroupNum!=1的时候，只用画出iGroupNum个图例就可以了。
337 //利用objGraphics图形对象的三个方法画出图例：
338 //FillRectangle()方法画出填充矩形，DrawRectangle()方法画出矩形的边框，
339 //DrawString()方法画出说明文字。这三个图形对象的方法在 .NET 框架类库类库中均已重载，
340 //可以很方便根据不同的参数来画出图形。
341 i = 0;
342 foreach(dataPole myPole in chartValues)
343 { //画出填充矩形。
344 objGraphics.FillRectangle(new SolidBrush(GetColor(i,iGroupNum)), symbolLeg.X, symbolLeg.Y, 20, 10);
345 //画出矩形边框。
346 objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20, 10);
347 //画出图例说明文字。
348 //objGraphics.DrawString(arrValueNames[i].ToString(), new Font("宋体", 10), Brushes.Black, descLeg);
349 objGraphics.DrawString(myPole.Name.ToString(), new Font("宋体", 9), Brushes.Black, descLeg);
350 //移动坐标位置，只移动Y方向的值即可。
351 symbolLeg.Y += 15;
352 descLeg.Y += 15;
353 //-------
354 i++;
355 if(iGroupNum ==1)
356 {
357 continue;
358 }
359 else if(iGroupNum !=1 &&
360 i>=iGroupNum)
361 {
362 break;
363 }
364 }
365
366
367 //----------遍历数据源的每一项数据，并根据数据的大小画出矩形图（即柱形图的柱）----------------------------------------------------------
368 //画出三维柱图
369 i=0;
370 foreach(dataPole myPole in chartValues)
371 {
372 if(myPole.Value>=0)
373 {
374 DrawCell(GetColor(i,iGroupNum),(i * iWidth) + iLeftTopX + 20, iPointZeroY - myPole.ValuePoint, iWidth-4, myPole.ValuePoint,iDeep);
375 }
376 else
377 {
378 DrawCell(GetColor(i,iGroupNum),(i * iWidth) + iLeftTopX + 20, iPointZeroY, iWidth-4, Math.Abs(myPole.ValuePoint),iDeep);
379 }
380 i++;
381 }
382 i=0;
383 foreach(dataPole myPole in chartValues)
384 {
385 //在每个柱的上方显示大小 因为怕被前面的矩形挡住，所以分开来画
386 if(myPole.Value>=0)
387 {
388 objGraphics.DrawString(myPole.Value.ToString(), new Font("宋体", 9), Brushes.Black, (i * iWidth) + iLeftTopX + 20 + 6, iPointZeroY - myPole.ValuePoint-iDeep-15);
389 if(iGroupNum != 1 && i%iGroupNum ==0)
390 {
391 objGraphics.DrawString(myPole.Type.ToString(), new Font("宋体", 9), Brushes.Black, (i * iWidth) + iLeftTopX + 20, iPointZeroY -iDeep+15);
392 }
393 }
394 else
395 {
396 objGraphics.DrawString(myPole.Value.ToString(), new Font("宋体", 9), Brushes.Black, (i * iWidth) + iLeftTopX + 20 + 6, iPointZeroY - myPole.ValuePoint-iDeep+15);
397 if(iGroupNum != 1&& i%iGroupNum ==0)
398 {
399 objGraphics.DrawString(myPole.Type.ToString(), new Font("宋体", 9), Brushes.Black, (i * iWidth) + iLeftTopX + 20, iPointZeroY -iDeep-15);
400 }
401 }
402 i++;
403 }
404 }
405
406 /// <summary>
407 ///
408 /// </summary>
409 /// <param name="itemIndex"></param>
410 /// <returns></returns>
411 private Color GetColor(int itemIndex,int iGroupNum)
412 {
413 Color objColor = Color.White;
414 int j = 0;
415 if(iGroupNum == 1)
416 {
417 j = itemIndex%ColorArray.Length;
418 }
419 else
420 {
421 j = itemIndex%iGroupNum;
422 }
423 objColor = ColorArray[j];
424
425 return objColor;
426 }
427
428
429 /// <summary>
430 /// 画三维柱图
431 /// </summary>
432 /// <param name="myColor">颜色，不透明之前</param>
433 /// <param name="x">长方体的前面一个面的左上角的坐标x点</param>
434 /// <param name="y">长方体的前面一个面的左上角的坐标y点</param>
435 /// <param name="width">长方体的前面一个面的宽</param>
436 /// <param name="height">长方体的前面一个面的高</param>
437 /// <param name="iDeep">长方体的深，后面一个面的X坐标为 前面一个面的x + iDeep </param>
438 private void DrawCell(Color myColor,float x,float y,float width,float height,float iDeep)
439 {
440 Rectangle Frect =
441 new Rectangle((int)x, (int)y, (int)width, (int)height);
442 Rectangle Brect =
443 new Rectangle(Frect.X + (int)iDeep, Frect.Y -(int)iDeep, Frect.Width, Frect.Height);
444
445 PointF p1 = new PointF((float)Frect.X, (float)Frect.Y);
446 PointF p2 = new PointF((float)Frect.X, (float)(Frect.Y + Frect.Height));
447 PointF p3 = new PointF((float)(Frect.X + Frect.Width), (float)(Frect.Y + Frect.Height));
448 PointF p4 = new PointF((float)(Frect.X + Frect.Width), (float)Frect.Y);
449
450 PointF p5 = new PointF((float)Brect.X, (float)Brect.Y);
451 PointF p6 = new PointF((float)Brect.X, (float)(Brect.Y + Brect.Height));
452 PointF p7 = new PointF((float)(Brect.X + Brect.Width), (float)(Brect.Y + Brect.Height));
453 PointF p8 = new PointF((float)(Brect.X + Brect.Width), (float)Brect.Y);
454
455 // Create points for polygon.
456 PointF[] ptsArray1 = //left
457 {
458 p1, p2, p6, p5
459 };
460
461 PointF[] ptsArray2 = //bottom
462 {
463 p2, p3, p7, p6
464 };
465
466 PointF[] ptsArray3 = //right
467 {
468 p4, p3, p7, p8
469 };
470
471 PointF[] ptsArray4 = //top
472 {
473 p1, p4, p8, p5
474 };
475 //
476 //myColor = Color.FromArgb(164,164,251);
477 //颜色的问题正在测试中。。。。。颜色太难看了。。。。：（
478
479 SolidBrush defaultBrush = //164,164,251
480 new SolidBrush(Color.FromArgb(128,myColor.R,myColor.G,myColor.B));
481 int r,g,b;
482 r = myColor.R - 37;
483 g = myColor.G - 37;
484 b = myColor.B - 45;
485 if (r<0) r=0;
486 if (g<0) g=0;
487 if (b<0) b=0;
488 SolidBrush topBrush = // 127,127,206 37,37,45
489 new SolidBrush(Color.FromArgb(188,r,g,b));
490 int r1,g1,b1;
491
492
493 r1 = myColor.R - 52;
494 g1 = myColor.G - 52;
495 b1 = myColor.B - 88;
496 if (r1<0) r1=0;
497 if (g1<0) g1=0;
498 if (b1<0) b1=0;
499 SolidBrush rightBrush = //112,112,163 52,52,88
500 new SolidBrush(Color.FromArgb(220,r1,g1,b1));
501
502
503 SolidBrush invisibleBrush =
504 new SolidBrush(Color.FromArgb(111,myColor.R,myColor.G,myColor.B));
505 SolidBrush visibleBrush =
506 new SolidBrush(Color.FromArgb(188,myColor.R,myColor.G,myColor.B));
507 SolidBrush FrectBrush =
508 new SolidBrush(Color.FromArgb(220,myColor.R,myColor.G,myColor.B));
509
510
511 // Fill recntagle1
512 //objGraphics.FillRectangle(invisibleBrush, Brect);
513 objGraphics.FillRectangle(defaultBrush, Brect);
514 objGraphics.DrawRectangle(Pens.Black, Brect);
515
516 // Fill Polygon1
517 //objGraphics.FillPolygon(invisibleBrush, ptsArray1);
518 objGraphics.FillPolygon(defaultBrush, ptsArray1);
519 objGraphics.DrawPolygon(Pens.Black, ptsArray1);
520 // Fill Polygon2
521 //objGraphics.FillPolygon(invisibleBrush, ptsArray2);
522 objGraphics.FillPolygon(defaultBrush, ptsArray2);
523 objGraphics.DrawPolygon(Pens.Black, ptsArray2);
524 // Fill Polygon3
525 //objGraphics.FillPolygon(visibleBrush, ptsArray3);
526 objGraphics.FillPolygon(rightBrush, ptsArray3);
527 objGraphics.DrawPolygon(Pens.Black, ptsArray3);
528 // Fill Polygon4
529 //objGraphics.FillPolygon(visibleBrush, ptsArray4);
530 objGraphics.FillPolygon(topBrush, ptsArray4);
531 objGraphics.DrawPolygon(Pens.Black, ptsArray4);
532
533 // Fill recntagle2
534 objGraphics.FillRectangle(FrectBrush, Frect);
535 objGraphics.DrawRectangle(Pens.Black, Frect);
536
537 invisibleBrush.Dispose();
538 visibleBrush.Dispose();
539 FrectBrush.Dispose();
540 }
541 }
542
}
using System;2
using System.Collections;3
using System.Drawing;4
using System.Drawing.Imaging;5
using System.Drawing.Drawing2D;6
using System.Drawing.Text;7
8
namespace Chart9
{
10
/// <summary>
11
/// ColumnChart 的摘要说明。12
/// </summary>13
public class ColumnChart14
{15
public int Width = 420; //图形的宽16
public int Height = 200; //图形的高17
public int iLeftTopX = 35; //数据区左上角的X18
public int iLeftTopY = 35; //数据区左上角的Y 19
public float iSectY = 100; //数据20
public Color BackColor = Color.White;21
public int iBottomHeight = 10;22
public float iLegWidth = 80;23
public int iGroupNum = 1; 24
25
public Color[] ColorArray 26
= new Color[]{Color.Blue,Color.Red,Color.Yellow,Color.Purple,Color.Orange,27
Color.Brown,Color.Gray,Color.Maroon,Color.AliceBlue, 28
Color.AntiqueWhite,Color.Aquamarine, Color.Azure,29
Color.YellowGreen,Color.Bisque,Color.Black,Color.BlanchedAlmond,30
Color.BlueViolet,Color.BurlyWood,Color.CadetBlue,Color.Chartreuse,Color.Chocolate};31
32
private ArrayList chartValues = new ArrayList(); //点数组33
private float iYdivs = 10; //y轴分成iYdivs等份 34
private string strUnit = "";35
private string strTitle = ""; 36
private float iBottom; //最小点的在Y轴上的位置 37
private float iSymbolLeg; //标记的x轴开始位置 38
private float iValueWidth; // 数据区的宽39
private float iValueHeight; // 数据区的高 40
private float iValueMaxY = 0; //Y轴最大值41
private float iValueMinY = 0; //Y轴最小值42
private float iPointZeroX = 0;43
private float iPointZeroY = 0; //坐标零点，如果没有负值，就是最小点的坐标44
private float iDeep = 10; //柱子的深度45
private int iWidth = 40; //每个柱占据的宽度，包括它右边的空格在内46
47
private Graphics objGraphics;48
/// <summary>49
/// 标题50
/// </summary>51
public string Title52
{53
get54
{55
return strTitle;56
}57
set58
{59
strTitle = value;60
}61
}62
63
64
/// <summary>65
/// Y轴的数值的单位66
/// </summary>67
public string Unit68
{69
get70
{71
return strUnit;72
}73
set74
{75
strUnit = value;76
}77
} 78
79
80
class dataPole81
{82
public float Value;83
public string Name;84
public string Type;85
public float ValuePoint;86
}87
88
/// <summary>89
/// 向图中添加一个值90
/// </summary>91
/// <param name="myValue">值的大小</param>92
/// <param name="myName">值的名称</param>93
public void AddValue(float myValue, string myName) 94
{95
dataPole myData = new dataPole();96
myData.Value = myValue;97
myData.Name = myName;98
myData.Type = myName;99
myData.ValuePoint = 0;100
101
chartValues.Add(myData);102
}103
104
/// <summary>105
/// 向图中添加一个值106
/// </summary>107
/// <param name="myValue">值的大小</param>108
/// <param name="myName">值的名称，写在右方</param>109
/// <param name="myType">值的类型，如一月二月，写在下方</param>110
public void AddValue(float myValue, string myName, string myType) 111
{112
dataPole myData = new dataPole();113
myData.Value = myValue;114
myData.Name = myName;115
myData.Type = myType;116
myData.ValuePoint = 0;117
118
chartValues.Add(myData);119
}120
121
/// <summary>122
/// 123
/// </summary>124
public ColumnChart(int myWidth, int myHeight, Graphics myGraphics ,string myUnit,string myTitle) 125
{126
strTitle = myTitle;127
strUnit = myUnit;128
129
Width = myWidth; 130
Height = myHeight;131
132
objGraphics = myGraphics;133
}134
135
/// <summary>136
/// 计算一些需要用到的值137
/// </summary>138
protected void CalculateValue()139
{140
float iRightLegWidth = 5;141
foreach(dataPole myPole in chartValues) 142
{143
SizeF size = objGraphics.MeasureString(myPole.Name,new Font("宋体", 9));144
if(iRightLegWidth < size.Width + 5 )145
{146
iRightLegWidth = size.Width + 5;147
}148
}149
iLegWidth = iRightLegWidth + 25;150
iSymbolLeg = Width - iLegWidth; 151
152
if(this.iGroupNum ==1)153
{154
iBottomHeight = 10;155
}156
else 157
{158
iBottomHeight = 25;159
}160
iBottom = Height - iBottomHeight;161
162
iValueWidth = iSymbolLeg - iLeftTopX - iDeep - 10;163
iValueHeight = iBottom - iLeftTopY;164
//-------------------------------------------------------------------------------------165
//算最大值 166
foreach(dataPole myPole in chartValues) 167
{168
for(;iValueMaxY < myPole.Value;iValueMaxY = iValueMaxY + iSectY);169
}170
//算最小值iValueMinY171
iValueMinY = iValueMaxY;172
foreach(dataPole myPole in chartValues) 173
{174
for(;iValueMinY > myPole.Value;iValueMinY = iValueMinY - iSectY);175
}176
//以上两个最大最小值是用来计算iYdivs的177
178
iYdivs = (iValueMaxY - iValueMinY)/iSectY;179
float fltemp = iSectY;180
for(;iYdivs > 10;iSectY += fltemp)181
{182
iYdivs = (iValueMaxY - iValueMinY)/iSectY;183
}184
185
//因为iSectY的值发生变化，所以要重新计算最大最小值。186
iValueMaxY = 0;187
//算最大值188
foreach(dataPole myPole in chartValues) 189
{190
for(;iValueMaxY < myPole.Value;iValueMaxY = iValueMaxY + iSectY);191
}192
//算最小值iValueMinY193
iValueMinY = iValueMaxY;194
foreach(dataPole myPole in chartValues) 195
{196
for(;iValueMinY > myPole.Value;iValueMinY = iValueMinY - iSectY);197
}198
//--------------------------------------------------------------------------------------------199
200
//最大值加上一段，这样不会顶在上面，留有一点余地201
iValueMaxY += iSectY;202
iPointZeroX = iLeftTopX;203
if(iValueMinY < 0 )204
{ //最小值减去一段，这样最短的不会只有一点，稍长一点，好看一些，205
//而且如果有负数，这样不会顶到下面206
iValueMinY -= iSectY; 207
iPointZeroY = iLeftTopY + iValueHeight*(iValueMaxY/(iValueMaxY - iValueMinY));208
}209
210
else if(iValueMinY > 0 )211
{212
iValueMinY -= iSectY;213
iPointZeroY = iBottom;214
}215
else 216
{ //如果iSectY大于所有值中的最小值，就会出现iValueMinY等于0的情况，217
//这个时候如果再将iValueMinY减去iSectY218
//就会得到iValueMinY为负数，应该屏蔽这种情况219
iPointZeroY = iBottom;220
}221
222
iYdivs = (iValueMaxY - iValueMinY)/iSectY;223
224
//iWidth是每个数值的宽度225
if(chartValues.Count!=0)226
{227
iWidth = (int)(iValueWidth - 40)/chartValues.Count;228
}229
230
if(iWidth > 40)231
{232
iWidth = 40;233
}234
else if(iWidth < 5)235
{236
iWidth = 5;237
}238
239
if(iDeep > (iWidth-iDeep)*7/10)240
{241
iDeep = (iWidth-iDeep)*7/10;242
}243
244
245
//得到相对应的值需要在图上画出的点数。画图的时候用ValuePoint，246
//取值的时候用Value，取名字的时候用Name247
if(iValueMinY >= 0)248
{249
foreach(dataPole myPole in chartValues) 250
{251
myPole.ValuePoint = System.Convert.ToInt32(iValueHeight * (myPole.Value - iValueMinY) / (iValueMaxY - iValueMinY));252
}253
}254
else255
{256
foreach(dataPole myPole in chartValues) 257
{258
myPole.ValuePoint = System.Convert.ToInt32((iPointZeroY- iLeftTopY) * (myPole.Value) / (iValueMaxY));259
}260
}261
262
}263
264
/// <summary>265
/// 画图；266
/// </summary>267
public void Draw() 268
{269
CalculateValue(); 270
271
int i; 272
273
//objGraphics.ScaleTransform(1,1); 274
//设定平滑为无锯齿275
//objGraphics.SmoothingMode = SmoothingMode.AntiAlias; 276
objGraphics.CompositingQuality = CompositingQuality.GammaCorrected;277
objGraphics.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;278
279
//清除整个绘图面并以指定White为背景色进行填充。 280
objGraphics.Clear(BackColor); 281
282
//----------绘制统计图标题--------------------------------------------------------------------------------------------283
//在画布（objBitMap对象），用指定的Brush（画笔）对象和Font（字体）对象绘制统计图标题。284
SizeF size = objGraphics.MeasureString(strTitle,new Font("宋体", 12, FontStyle.Bold));285
objGraphics.DrawString(strTitle, new Font("宋体", 12, FontStyle.Bold), Brushes.Black, (iSymbolLeg - size.Width)/2, 10);286
287
//------------画横线，方便用户查看-----------------------------------------------------------------------------------------------288
float x = iLeftTopX,y=0;289
string myLabel; 290
Pen SilverPen = new Pen(Color.Silver, 1);291
Pen BlackPen = new Pen(Color.Black, 1); 292
for(i = 0;i<=iYdivs;i++)293
{294
y = iBottom - (i * iValueHeight / iYdivs);295
myLabel = System.Convert.ToString(Math.Round(iValueMinY + ((iValueMaxY - iValueMinY) * i / iYdivs),2));296
//写左边的坐标的值297
objGraphics.DrawString(myLabel, new Font("宋体", 9), new SolidBrush(Color.Black), 5, y - 6);298
299
//画线300
objGraphics.DrawLine(SilverPen, x, y, x+iDeep , y -iDeep);301
objGraphics.DrawLine(SilverPen, x +iDeep , y -iDeep , x + iValueWidth +iDeep, y -iDeep); 302
objGraphics.DrawLine(BlackPen, x-2, y, x, y);303
}304
//写出y轴的单位305
myLabel = "单位：" + strUnit;306
objGraphics.DrawString(myLabel, new Font("宋体", 9), new SolidBrush(Color.Black), 3, y - iDeep -13);307
//-----------------------------------------------------------------------------------------------------------------------------------308
309
//--------画图形区域---------------------------------------------------------------------------------------------------------310
//这四个点是左边的坐标面311
PointF p1 = new PointF(iLeftTopX,iLeftTopY);312
PointF p2 = new PointF(iLeftTopX+ iDeep, iLeftTopY - iDeep);313
PointF p3 = new PointF(iLeftTopX,iLeftTopY + iValueHeight);314
PointF p4 = new PointF(iLeftTopX +iDeep,iLeftTopY + iValueHeight -iDeep);315
//这四个点是0点的横的坐标面316
PointF p5 = new PointF(iPointZeroX,iPointZeroY);317
PointF p6 = new PointF(iPointZeroX + iDeep,iPointZeroY - iDeep);318
PointF p7 = new PointF(iPointZeroX + iValueWidth,iPointZeroY);319
PointF p8 = new PointF(iPointZeroX + iValueWidth + iDeep,iPointZeroY -iDeep);320
321
PointF[] ptsArray1 ={p1, p3, p4, p2};322
PointF[] ptsArray2 ={p5, p7, p8, p6};323
324
//左边的坐标面325
objGraphics.DrawPolygon(BlackPen,ptsArray1);326
//0点的横的坐标面327
objGraphics.DrawPolygon(BlackPen,ptsArray2);328
//数据区329
objGraphics.DrawRectangle(BlackPen, iLeftTopX+ iDeep, iLeftTopY - iDeep, iValueWidth, iValueHeight);330
//----------------------------------------------------------------------------------------------------------------------------------331
332
//----------创建图例文字-------------------------------------------------------------------------------------------------------- 333
PointF symbolLeg = new PointF(iSymbolLeg, 5);334
PointF descLeg = new PointF(iSymbolLeg + 25, 2);335
//画出图例。336
//当iGroupNum!=1的时候，只用画出iGroupNum个图例就可以了。337
//利用objGraphics图形对象的三个方法画出图例：338
//FillRectangle()方法画出填充矩形，DrawRectangle()方法画出矩形的边框，339
//DrawString()方法画出说明文字。这三个图形对象的方法在 .NET 框架类库类库中均已重载，340
//可以很方便根据不同的参数来画出图形。341
i = 0;342
foreach(dataPole myPole in chartValues) 343
{ //画出填充矩形。344
objGraphics.FillRectangle(new SolidBrush(GetColor(i,iGroupNum)), symbolLeg.X, symbolLeg.Y, 20, 10);345
//画出矩形边框。346
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20, 10);347
//画出图例说明文字。348
//objGraphics.DrawString(arrValueNames[i].ToString(), new Font("宋体", 10), Brushes.Black, descLeg);349
objGraphics.DrawString(myPole.Name.ToString(), new Font("宋体", 9), Brushes.Black, descLeg);350
//移动坐标位置，只移动Y方向的值即可。351
symbolLeg.Y += 15;352
descLeg.Y += 15;353
//-------354
i++;355
if(iGroupNum ==1)356
{357
continue;358
}359
else if(iGroupNum !=1 &&360
i>=iGroupNum)361
{362
break;363
}364
}365
366
367
//----------遍历数据源的每一项数据，并根据数据的大小画出矩形图（即柱形图的柱）----------------------------------------------------------368
//画出三维柱图369
i=0;370
foreach(dataPole myPole in chartValues) 371
{372
if(myPole.Value>=0)373
{374
DrawCell(GetColor(i,iGroupNum),(i * iWidth) + iLeftTopX + 20, iPointZeroY - myPole.ValuePoint, iWidth-4, myPole.ValuePoint,iDeep);375
}376
else377
{378
DrawCell(GetColor(i,iGroupNum),(i * iWidth) + iLeftTopX + 20, iPointZeroY, iWidth-4, Math.Abs(myPole.ValuePoint),iDeep);379
}380
i++;381
}382
i=0;383
foreach(dataPole myPole in chartValues) 384
{ 385
//在每个柱的上方显示大小 因为怕被前面的矩形挡住，所以分开来画386
if(myPole.Value>=0)387
{388
objGraphics.DrawString(myPole.Value.ToString(), new Font("宋体", 9), Brushes.Black, (i * iWidth) + iLeftTopX + 20 + 6, iPointZeroY - myPole.ValuePoint-iDeep-15);389
if(iGroupNum != 1 && i%iGroupNum ==0)390
{391
objGraphics.DrawString(myPole.Type.ToString(), new Font("宋体", 9), Brushes.Black, (i * iWidth) + iLeftTopX + 20, iPointZeroY -iDeep+15);392
}393
}394
else395
{396
objGraphics.DrawString(myPole.Value.ToString(), new Font("宋体", 9), Brushes.Black, (i * iWidth) + iLeftTopX + 20 + 6, iPointZeroY - myPole.ValuePoint-iDeep+15);397
if(iGroupNum != 1&& i%iGroupNum ==0)398
{399
objGraphics.DrawString(myPole.Type.ToString(), new Font("宋体", 9), Brushes.Black, (i * iWidth) + iLeftTopX + 20, iPointZeroY -iDeep-15);400
}401
}402
i++;403
}404
}405
406
/// <summary>407
/// 408
/// </summary>409
/// <param name="itemIndex"></param>410
/// <returns></returns>411
private Color GetColor(int itemIndex,int iGroupNum)412
{413
Color objColor = Color.White;414
int j = 0;415
if(iGroupNum == 1)416
{417
j = itemIndex%ColorArray.Length;418
}419
else420
{421
j = itemIndex%iGroupNum;422
}423
objColor = ColorArray[j];424
425
return objColor;426
}427
428
429
/// <summary>430
/// 画三维柱图431
/// </summary>432
/// <param name="myColor">颜色，不透明之前</param>433
/// <param name="x">长方体的前面一个面的左上角的坐标x点</param>434
/// <param name="y">长方体的前面一个面的左上角的坐标y点</param>435
/// <param name="width">长方体的前面一个面的宽</param>436
/// <param name="height">长方体的前面一个面的高</param>437
/// <param name="iDeep">长方体的深，后面一个面的X坐标为 前面一个面的x + iDeep </param>438
private void DrawCell(Color myColor,float x,float y,float width,float height,float iDeep)439
{440
Rectangle Frect = 441
new Rectangle((int)x, (int)y, (int)width, (int)height);442
Rectangle Brect = 443
new Rectangle(Frect.X + (int)iDeep, Frect.Y -(int)iDeep, Frect.Width, Frect.Height);444
445
PointF p1 = new PointF((float)Frect.X, (float)Frect.Y);446
PointF p2 = new PointF((float)Frect.X, (float)(Frect.Y + Frect.Height));447
PointF p3 = new PointF((float)(Frect.X + Frect.Width), (float)(Frect.Y + Frect.Height));448
PointF p4 = new PointF((float)(Frect.X + Frect.Width), (float)Frect.Y);449
450
PointF p5 = new PointF((float)Brect.X, (float)Brect.Y);451
PointF p6 = new PointF((float)Brect.X, (float)(Brect.Y + Brect.Height));452
PointF p7 = new PointF((float)(Brect.X + Brect.Width), (float)(Brect.Y + Brect.Height));453
PointF p8 = new PointF((float)(Brect.X + Brect.Width), (float)Brect.Y);454
455
// Create points for polygon.456
PointF[] ptsArray1 = //left457
{458
p1, p2, p6, p5459
};460
461
PointF[] ptsArray2 = //bottom462
{463
p2, p3, p7, p6464
};465
466
PointF[] ptsArray3 = //right467
{468
p4, p3, p7, p8469
};470
471
PointF[] ptsArray4 = //top472
{473
p1, p4, p8, p5474
};475
//476
//myColor = Color.FromArgb(164,164,251);477
//颜色的问题正在测试中。。。。。颜色太难看了。。。。：（478
479
SolidBrush defaultBrush = //164,164,251 480
new SolidBrush(Color.FromArgb(128,myColor.R,myColor.G,myColor.B));481
int r,g,b;482
r = myColor.R - 37;483
g = myColor.G - 37;484
b = myColor.B - 45;485
if (r<0) r=0;486
if (g<0) g=0;487
if (b<0) b=0;488
SolidBrush topBrush = // 127,127,206 37,37,45489
new SolidBrush(Color.FromArgb(188,r,g,b));490
int r1,g1,b1;491
492
493
r1 = myColor.R - 52;494
g1 = myColor.G - 52;495
b1 = myColor.B - 88;496
if (r1<0) r1=0;497
if (g1<0) g1=0;498
if (b1<0) b1=0;499
SolidBrush rightBrush = //112,112,163 52,52,88500
new SolidBrush(Color.FromArgb(220,r1,g1,b1));501
502
503
SolidBrush invisibleBrush = 504
new SolidBrush(Color.FromArgb(111,myColor.R,myColor.G,myColor.B));505
SolidBrush visibleBrush = 506
new SolidBrush(Color.FromArgb(188,myColor.R,myColor.G,myColor.B));507
SolidBrush FrectBrush = 508
new SolidBrush(Color.FromArgb(220,myColor.R,myColor.G,myColor.B));509
510
511
// Fill recntagle1512
//objGraphics.FillRectangle(invisibleBrush, Brect);513
objGraphics.FillRectangle(defaultBrush, Brect);514
objGraphics.DrawRectangle(Pens.Black, Brect);515
516
// Fill Polygon1517
//objGraphics.FillPolygon(invisibleBrush, ptsArray1);518
objGraphics.FillPolygon(defaultBrush, ptsArray1);519
objGraphics.DrawPolygon(Pens.Black, ptsArray1);520
// Fill Polygon2521
//objGraphics.FillPolygon(invisibleBrush, ptsArray2);522
objGraphics.FillPolygon(defaultBrush, ptsArray2);523
objGraphics.DrawPolygon(Pens.Black, ptsArray2);524
// Fill Polygon3525
//objGraphics.FillPolygon(visibleBrush, ptsArray3);526
objGraphics.FillPolygon(rightBrush, ptsArray3); 527
objGraphics.DrawPolygon(Pens.Black, ptsArray3);528
// Fill Polygon4529
//objGraphics.FillPolygon(visibleBrush, ptsArray4);530
objGraphics.FillPolygon(topBrush, ptsArray4);531
objGraphics.DrawPolygon(Pens.Black, ptsArray4);532
533
// Fill recntagle2534
objGraphics.FillRectangle(FrectBrush, Frect); 535
objGraphics.DrawRectangle(Pens.Black, Frect);536
537
invisibleBrush.Dispose();538
visibleBrush.Dispose();539
FrectBrush.Dispose();540
}541
}542
}使用方法如下：
如：在窗口Form1加上一个pictureBox1控件
1private void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
2{
3 Chart.ColumnChart myChart = new Chart.ColumnChart(this.pictureBox1.Width,this.pictureBox1.Height
4 ,e.Graphics ,"分","高一(二)班各科成绩统计");
5 myChart.iLeftTopX = 45; //数据区左上角的X
6 myChart.iLeftTopY = 50; //数据区左上角的Y
7 myChart.iSectY = 2; //数据段大小
8 myChart.iGroupNum = 5; //分组数
9
10 myChart.AddValue(69,"语文","男生");
11 myChart.AddValue(82,"数学","男生");
12 myChart.AddValue(78,"英语","男生");
13 myChart.AddValue(80,"物理","男生");
14 myChart.AddValue(74,"化学","男生");
15
16 myChart.AddValue(77,"语文","女生");
17 myChart.AddValue(78,"数学","女生");
18 myChart.AddValue(80,"英语","女生");
19 myChart.AddValue(76,"物理","女生");
20 myChart.AddValue(69,"化学","女生");
21
22 myChart.Draw();
23}
private void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)2
{3
Chart.ColumnChart myChart = new Chart.ColumnChart(this.pictureBox1.Width,this.pictureBox1.Height4
,e.Graphics ,"分","高一(二)班各科成绩统计");5
myChart.iLeftTopX = 45; //数据区左上角的X6
myChart.iLeftTopY = 50; //数据区左上角的Y7
myChart.iSectY = 2; //数据段大小8
myChart.iGroupNum = 5; //分组数9
10
myChart.AddValue(69,"语文","男生");11
myChart.AddValue(82,"数学","男生");12
myChart.AddValue(78,"英语","男生");13
myChart.AddValue(80,"物理","男生");14
myChart.AddValue(74,"化学","男生");15
16
myChart.AddValue(77,"语文","女生");17
myChart.AddValue(78,"数学","女生");18
myChart.AddValue(80,"英语","女生");19
myChart.AddValue(76,"物理","女生");20
myChart.AddValue(69,"化学","女生");21
22
myChart.Draw();23
}效果如图所示：
