用C#绘制曲线图.doc

用C#绘制曲线图照例先上图:比以前Cool吧?呵呵,其实就是根据数据自动计算边距和字体等./自动根据参数调整图像大小/Public void Fit()/计算字体距离intFontSpace=FontSize+5;/计算图像边距Float fltSpace=Math.Min(Width/6, Height/6);XSpace=fltSpace;YSpace=fltSpace;/计算X轴刻度宽度XSlice=(Width-2*XSpace)/(Keys.Length-1);/计算Y轴刻度宽度和Y轴刻度开始值float fltMinValue=0;float fltMaxValue=0;for(int i=0;iValues.Length;i+)if(ValuesifltMaxValue)fltMaxValue=Valuesi;if(YSliceBeginfltMinValue)YSliceBegin= fltMinValue;int intYSliceCount=(int)(fltMaxValue/YSliceValue);if(fltMaxValue%YSliceValue!=0)intYSliceCount+;YSlice=(Height-2*YSpace)/intYSliceCount;看我把数据缩小一个级别的效果:因为代码里面充斥了大量注释,也不敲太多文字了.完整代码奉上:usingSystem;usingSystem.Collections.Generic;usingSystem.Text;usingSystem.Drawing;usingSystem.Data;usingSystem.Drawing.Drawing2D;namespaceSarchPMS.Business.DrawpublicclassDrawingCurve:DrawingChart/画曲线图/publicoverrideBitmapDrawImage(DataSetdsParameter)Curve2Dcuv2D=newCurve2D();cuv2D.Fit();returncuv2D.CreateImage();publicclassCurve2DprivateGraphicsobjGraphics;/Graphics类提供将对象绘制到显示设备的方法privateBitmapobjBitmap;/位图对象privatefloatfltWidth=480;/图像宽度privatefloatfltHeight=248;/图像高度privatefloatfltXSlice=50;/X轴刻度宽度privatefloatfltYSlice=50;/Y轴刻度宽度privatefloatfltYSliceValue=20;/Y轴刻度的数值宽度privatefloatfltYSliceBegin=0;/Y轴刻度开始值privatefloatfltTension=0.5f;privatestringstrTitle=曲线图;/标题privatestringstrXAxisText=月份;/X轴说明文字privatestringstrYAxisText=万元;/Y轴说明文字privatestringstrsKeys=newstring一月,二月,三月,四月,五月,六月,七月,八月,九月,十月,十一月,十二月;/键privatefloatfltsValues=newfloat20.0f,30.0f,50.0f,55.4f,21.6f,12.8f,99.5f,36.4f,78.2f,56.4f,45.8f,66.5f,99.5f,36.4f,78.2f,56.4f,45.8f,66.5f,20.0f,30.0f,50.0f,55.4f,21.6f,12.8f;/值privateColorclrBgColor=Color.Snow;/背景色privateColorclrTextColor=Color.Black;/文字颜色privateColorclrBorderColor=Color.Black;/整体边框颜色privateColorclrAxisColor=Color.Black;/轴线颜色privateColorclrAxisTextColor=Color.Black;/轴说明文字颜色privateColorclrSliceTextColor=Color.Black;/刻度文字颜色privateColorclrSliceColor=Color.Black;/刻度颜色privateColorclrsCurveColors=newColorColor.Red,Color.Blue;/曲线颜色privatefloatfltXSpace=100f;/图像左右距离边缘距离privatefloatfltYSpace=100f;/图像上下距离边缘距离privateintintFontSize=9;/字体大小号数privatefloatfltXRotateAngle=30f;/X轴文字旋转角度privatefloatfltYRotateAngle=0f;/Y轴文字旋转角度privateintintCurveSize=2;/曲线线条大小privateintintFontSpace=0;/intFontSpace是字体大小和距离调整出来的一个比较适合的数字#region公共属性/图像的宽度/publicfloatWidthsetif(value100)fltWidth=100;elsefltWidth=value;getif(fltWidth=100)return100;elsereturnfltWidth;/图像的高度/publicfloatHeightsetif(value100)fltHeight=100;elsefltHeight=value;getif(fltHeight=100)return100;elsereturnfltHeight;/X轴刻度宽度/publicfloatXSlicesetfltXSlice=value;getreturnfltXSlice;/Y轴刻度宽度/publicfloatYSlicesetfltYSlice=value;getreturnfltYSlice;/Y轴刻度的数值宽度/publicfloatYSliceValuesetfltYSliceValue=value;getreturnfltYSliceValue;/Y轴刻度开始值/publicfloatYSliceBeginsetfltYSliceBegin=value;getreturnfltYSliceBegin;/张力系数/publicfloatTensionsetif(value1.0f)fltTension=0.5f;elsefltTension=value;getreturnfltTension;/标题/publicstringTitlesetstrTitle=value;getreturnstrTitle;/键，X轴数据/publicstringKeyssetstrsKeys=value;getreturnstrsKeys;/值，Y轴数据/publicfloatValuessetfltsValues=value;getreturnfltsValues;/背景色/publicColorBgColorsetclrBgColor=value;getreturnclrBgColor;/文字颜色/publicColorTextColorsetclrTextColor=value;getreturnclrTextColor;/整体边框颜色/publicColorBorderColorsetclrBorderColor=value;getreturnclrBorderColor;/轴线颜色/publicColorAxisColorsetclrAxisColor=value;getreturnclrAxisColor;/X轴说明文字/publicstringXAxisTextsetstrXAxisText=value;getreturnstrXAxisText;/Y轴说明文字/publicstringYAxisTextsetstrYAxisText=value;getreturnstrYAxisText;/轴说明文字颜色/publicColorAxisTextColorsetclrAxisTextColor=value;getreturnclrAxisTextColor;/刻度文字颜色/publicColorSliceTextColorsetclrSliceTextColor=value;getreturnclrSliceTextColor;/刻度颜色/publicColorSliceColorsetclrSliceColor=value;getreturnclrSliceColor;/曲线颜色/publicColorCurveColorssetclrsCurveColors=value;getreturnclrsCurveColors;/X轴文字旋转角度/publicfloatXRotateAnglegetreturnfltXRotateAngle;setfltXRotateAngle=value;/Y轴文字旋转角度/publicfloatYRotateAnglegetreturnfltYRotateAngle;setfltYRotateAngle=value;/图像左右距离边缘距离/publicfloatXSpacegetreturnfltXSpace;setfltXSpace=value;/图像上下距离边缘距离/publicfloatYSpacegetreturnfltYSpace;setfltYSpace=value;/字体大小号数/publicintFontSizegetreturnintFontSize;setintFontSize=value;/曲线线条大小/publicintCurveSizegetreturnintCurveSize;setintCurveSize=value;#endregion/自动根据参数调整图像大小/publicvoidFit()/计算字体距离intFontSpace=FontSize+5;/计算图像边距floatfltSpace=Math.Min(Width/6,Height/6);XSpace=fltSpace;YSpace=fltSpace;/计算X轴刻度宽度XSlice=(Width-2*XSpace)/(Keys.Length-1);/计算Y轴刻度宽度和Y轴刻度开始值floatfltMinValue=0;floatfltMaxValue=0;for(inti=0;iValues.Length;i+)if(ValuesifltMaxValue)fltMaxValue=Valuesi;if(YSliceBeginfltMinValue)YSliceBegin=fltMinValue;intintYSliceCount=(int)(fltMaxValue/YSliceValue);if(fltMaxValue%YSliceValue!=0)intYSliceCount+;YSlice=(Height-2*YSpace)/intYSliceCount;接上文: /生成图像并返回bmp图像对象/publicBitmapCreateImage()InitializeGraph();intintKeysCount=Keys.Length;intintValuesCount=Values.Length;if(intValuesCount%intKeysCount=0)intintCurvesCount=intValuesCount/intKeysCount;for(inti=0;iintCurvesCount;i+)floatfltCurrentValues=newfloatintKeysCount;for(intj=0;jintKeysCount;j+)fltCurrentValuesj=Valuesi*intKeysCount+j;DrawContent(refobjGraphics,fltCurrentValues,clrsCurveColorsi);elseobjGraphics.DrawString(发生错误，Values的长度必须是Keys的整数倍!,newFont(宋体,FontSize+5),newSolidBrush(TextColor),newPoint(int)XSpace,(int)(Height/2);returnobjBitmap;/初始化和填充图像区域，画出边框，初始标题/privatevoidInitializeGraph()/根据给定的高度和宽度创建一个位图图像objBitmap=newBitmap(int)Width,(int)Height);/从指定的objBitmap对象创建objGraphics对象(即在objBitmap对象中画图)objGraphics=Graphics.FromImage(objBitmap);/根据给定颜色(LightGray)填充图像的矩形区域(背景)objGraphics.DrawRectangle(newPen(BorderColor,1),0,0,Width-1,Height-1);/画边框objGraphics.FillRectangle(newSolidBrush(BgColor),1,1,Width-2,Height-2);/填充边框/画X轴,注意图像的原始X轴和Y轴计算是以左上角为原点，向右和向下计算的floatfltX1=XSpace;floatfltY1=Height-YSpace;floatfltX2=Width-XSpace+XSlice/2;floatfltY2=fltY1;objGraphics.DrawLine(newPen(newSolidBrush(AxisColor),1),fltX1,fltY1,fltX2,fltY2);/画Y轴fltX1=XSpace;fltY1=Height-YSpace;fltX2=XSpace;fltY2=YSpace-YSlice/2;objGraphics.DrawLine(newPen(newSolidBrush(AxisColor),1),fltX1,fltY1,fltX2,fltY2);/初始化轴线说明文字SetAxisText(refobjGraphics);/初始化X轴上的刻度和文字SetXAxis(refobjGraphics);/初始化Y轴上的刻度和文字SetYAxis(refobjGraphics);/初始化标题CreateTitle(refobjGraphics);/初始化轴线说明文字/privatevoidSetAxisText(refGraphicsobjGraphics)floatfltX=Width-XSpace+XSlice/2-(XAxisText.Length-1)*intFontSpace;floatfltY=Height-YSpace-intFontSpace;objGraphics.DrawString(XAxisText,newFont(宋体,FontSize),newSolidBrush(AxisTextColor),fltX,fltY);fltX=XSpace+5;fltY=YSpace-YSlice/2-intFontSpace;for(inti=0;iYAxisText.Length;i+)objGraphics.DrawString(YAxisTexti.ToString(),newFont(宋体,FontSize),newSolidBrush(AxisTextColor),fltX,fltY);fltY+=intFontSpace;/字体上下距离/初始化X轴上的刻度和文字/privatevoidSetXAxis(refGraphicsobjGraphics)floatfltX1=XSpace;floatfltY1=Height-YSpace;floatfltX2=XSpace;floatfltY2=Height-YSpace;intiCount=0;intiSliceCount=1;floatScale=0;floatiWidth=(Width-2*XSpace)/XSlice)*50;/将要画刻度的长度分段，并乘以50，以10为单位画刻度线。floatfltSliceHeight=XSlice/10;/刻度线的高度objGraphics.TranslateTransform(fltX1,fltY1);/平移图像(原点)objGraphics.RotateTransform(XRotateAngle,MatrixOrder.Prepend);/旋转图像objGraphics.DrawString(Keys0.ToString(),newFont(宋体,FontSize),newSolidBrush(SliceTextColor),0,0);objGraphics.ResetTransform();/重置图像for(inti=0;i=iWidth;i+=10)/以10为单位Scale=i*XSlice/50;/即(i/10)*(XSlice/5)，将每个刻度分五部分画，但因为i以10为单位，得除以10if(iCount=5)objGraphics.DrawLine(newPen(newSolidBrush(AxisColor),fltX1+Scale,fltY1+fltSliceHeight*1.5f,fltX2+Scale,fltY2-fltSliceHeight*1.5f);/画网格虚线PenpenDashed=newPen(newSolidBrush(AxisColor);penDashed.DashStyle=DashStyle.Dash;objGraphics.DrawLine(penDashed,fltX1+Scale,fltY1,fltX2+Scale,YSpace-YSlice/2);/这里显示X轴刻度if(iSliceCountWidth-XSpace)break;elseobjGraphics.DrawLine(newPen(newSolidBrush(SliceColor),fltX1+Scale,fltY1+fltSliceHeight,fltX2+Scale,fltY2-fltSliceHeight);iCount+;/初始化Y轴上的刻度和文字/privatevoidSetYAxis(refGraphicsobjGraphics)floatfltX1=XSpace;floatfltY1=Height-YSpace;floatfltX2=XSpace;floatfltY2=Height-YSpace;intiCount=0;floatScale=0;intiSliceCount=1;floatiHeight=(Height-2*YSpace)/YSlice)*50;/将要画刻度的长度分段，并乘以50，以10为单位画刻度线。floatfltSliceWidth=YSlice/10;/刻度线的宽度stringstrSliceText=string.Empty;objGraphics.TranslateTransform(XSpace-intFontSpace*YSliceBegin.ToString().Length,Height-YSpace);/平移图像(原点)objGraphics.RotateTransform(YRotateAngle,MatrixOrder.Prepend);/旋转图像objGraphics.DrawString(YSliceBegin.ToString(),newFont(宋体,FontSize),newSolidBrush(SliceTextColor),0,0);objGraphics.ResetTransform();/重置图像for(inti=0;iiHeight;i+=10)Scale=i*YSlice/50;/即(i/10)*(YSlice/5)，将每个刻度分五部分画，但因为i以10为单位，得除以10if(iCount=5)objGraphics.DrawLine(newPen(newSolidBrush(AxisColor),fltX1-fltSliceWidth*1.5f,fltY1-Scale,fltX2+fltSliceWidth*1.5f,fltY2-Scale);/画网格虚线PenpenDashed=newPen(newSolidBrush(AxisColor);penDashed.DashStyle=DashStyle.Dash;objGraphics.DrawLine(penDashed,XSpace,fltY1-Scale,Width-XSpace+XSlice/2,fltY2-Scale);/这里显示Y轴刻度strSliceText=Convert.ToString(YSliceValue*iSliceCount+YSliceBegin);objGraphics.TranslateTransform(XSpace-intFontSize*strSliceText.Length,fltY1-Scale);/平移图像(原点)objGraphics.RotateTransform(YRotateAngle,MatrixOrder.Prepend);/旋转图像objGraphics.DrawString(strSliceText,newFont(宋体,FontSize),newSolidBrush(SliceTextColor),0,0);objGraphics.ResetTransform();/重置图像iCount=0;iSliceCount+;elseobjGraphics.DrawLine(newPen(newSolidBrush(SliceColor),fltX1-fltSliceWidth,fltY1-Scale,fltX2+fltSliceWidth,fltY2-Scale);iCount+;/画曲线/privatevoidDrawContent(refGraphicsobjGraphics,floatfltCurrentValues,ColorclrCurrentColor)PenCurvePen=newPen(clrCurrentColor,CurveSize);PointFCurvePointF=newPointFKeys.Length;floatkeys=0;floatvalues=0;for(inti=0;iKeys.Length;i+)keys=XSlice*i+XSpace;values=(Height-YSpace)+YSliceBegin-YSlice*(fltCurrentValuesi/YSliceValue);CurvePointFi=newPointF(keys,values);objGraphics.DrawCurve(CurvePen,CurvePointF,Tension);/初始化标题/privatevoidCreateTitle(refGraphicsobjGraphics)objGraphics.DrawString(Title,newFont(宋体,FontSize),newSolidBrush(TextColor),newPoint(int)(Width-XSpace)-intFontSize*Title.Length,(int)(YSpace-YSlice/2-intFontSpace);一个较能通用的C#画曲线类源码如下，思想以后面机会再说明： 曲线类返回一个画好的图片曲线类源码开始using System;using System.Collections.Generic;using System.Text;using System.Drawing;namespace testPictureBox public class CurvePaint public CurvePaint() /刻度线条数 private int _X_KeduCount=12; private int _Y_KeduCount=12; /刻度值位置对应刻度线左移像素 private float _X_valueStrMoveleft=5f; private float _Y_valueStrMoveleft=45f; /格式化刻度值 private string _X_Format = #0.0; private string _Y_Format = #0.00; /X轴刻度值文字方向 private bool _X_DirectionVertical = false; public int XkeduCount get return _X_KeduCount; set _X_KeduCount = value; public int YkeduCount get return _Y_KeduCount; set _Y_KeduCount = value; public float XvalueStrMoveleft get return _X_valueStrMoveleft; set _X_valueStrMoveleft = value; public float YvalueStrMoveleft get return _Y_valueStrMoveleft; set _Y_valueStrMoveleft = value; public bool XdirectionVertical get return _X_DirectionVertical; set _X_DirectionVertical = value; public string Xformat get return _X_Format; set _X_Format = value; public string Yformat get return _Y_Format; set _Y_Format = value; private void setExtremeVal