绘画曲线图。
最近工作中涉及到绘画曲线图的功能。
研究了一下，把代码贴出来，年纪大了，忘形大。
文件描述#region 文件描述
// -------------------------------------------------------------------------------------------------// 描述：绘画曲线图// 作者：郭锋// 日期：2007年3月 日// -------------------------------------------------------------------------------------------------
#endregion
using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Drawing;using System.Drawing.Imaging;using System.IO;namespace ColorFul.Infor.wwwroot.Class
{ public class Curve
{ private // 私有成员数据区#region private // 私有成员数据区 // --------------------------------------------------------------------------------------------- /**//// <summary> /// X轴长度
/// </summary> private int _xWidth; // X轴长度 /**//// <summary> /// Y轴长度 /// </summary> private int _yHeight; // Y轴长度 /**//// <summary> /// X轴大刻度间隔长度 /// </summary> private int _xBigSpace; // X轴大刻度间隔长度 /**//// <summary> /// X轴小刻度间隔长度 /// </summary> private int _xSmallSpace; // X轴小刻度间隔长度 /**//// <summary> /// Y轴刻度间隔长度 /// </summary> private int _ySpace; // Y轴刻度间隔长度 /**//// <summary> /// 曲线值间隔 /// </summary> private decimal _ySpaceValue; // 曲线值间隔 /**//// <summary> /// 原点X轴坐标 /// </summary> private int Origin_x; // 原点X轴坐标 /**//// <summary> /// 原点Y轴坐标 /// </summary> private int Origin_y; // 原点Y轴坐标 /**//// <summary> /// X轴大刻度数目 /// </summary> private int _xMaxScaleCount; // X轴大刻度数目 /**//// <summary> /// Y轴输入的最大值 /// </summary> private float _yMaxValue; // Y轴输入的最大值 /**//// <summary> /// Y轴输入的最小值 /// </summary> private float _yMinValue; //Y轴输入的最小值 /**//// <summary> /// Y轴刻度值预留长度 /// </summary> private int _yTextLength = 10; //Y轴刻度值预留长度 /**//// <summary> /// X轴刻度值预留高度 /// </summary> private int _xTextHeight = 10; //X轴刻度值预留高度 /**//// <summary> /// 标题行高 /// </summary> private int TitleHeight = 0; //标题行高 // --------------------------------------------------------------------------------------------- #endregion public //公共属性区域#region public //公共属性区域 // ----------------------------------------------------------------------------------------- public string ImgTitle // 图片标题#region public string ImgTitle // 图片标题 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 图片标题 /// </summary> private string _imgTitle; // 图片标题 /**//// <summary> /// 图片标题 /// </summary> public string ImgTitle { set { _imgTitle = value; } } // ----------------------------------------------------------------------------------------- #endregion public float[] Values //曲线数值#region public float[] Values //曲线数值 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 曲线数值 /// </summary> private float[] _values; // 曲线数值 /**//// <summary> /// 曲线数值 /// </summary> public float[] DataValues { set { _values = value; } } // ----------------------------------------------------------------------------------------- #endregion public int XMinScaleCount //X轴的最大范围#region public int XMinScaleCount //X轴的最大范围 // ----------------------------------------------------------------------------------------- /**//// <summary> /// X轴小刻度数目; /// </summary> private int _xMinScaleCount = 0; // X轴小刻度数目; /**//// <summary> /// X轴的最大范围 /// </summary> public int XMinScaleCount { set { _xMinScaleCount = value; } } // ----------------------------------------------------------------------------------------- #endregion public string XTitle // X轴坐标标题#region public string XTitle // X轴坐标标题 // ----------------------------------------------------------------------------------------- /**//// <summary> /// X轴文字 /// </summary> private string _xTitle="X轴标题"; // X轴文字 /**//// <summary> /// X轴坐标标题 /// </summary> public string XTitle { get { return _xTitle; } set { _xTitle = value; } } // ----------------------------------------------------------------------------------------- #endregion public string YTitle // Y轴坐标标题#region public string YTitle // Y轴坐标标题 // ----------------------------------------------------------------------------------------- /**//// <summary> /// Y轴文字 /// </summary> private string _yTitle="Y轴标题"; // Y轴文字 /**//// <summary> /// Y轴坐标标题 /// </summary> public string YTitle { get { return _yTitle; } set { _yTitle = value; } } // ----------------------------------------------------------------------------------------- #endregion public int ImgWidth //图片宽度#region public int ImgWidth //图片宽度 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 图片宽度 /// </summary> private int _imgWidth = 500; // 图片宽度 /**//// <summary> /// 图片宽度 /// </summary> public int ImgWidth { get { return _imgWidth; } set { _imgWidth = value; } } // ----------------------------------------------------------------------------------------- #endregion public int ImgHeight //图片高度#region public int ImgHeight //图片高度 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 图片高度 /// </summary> private int _imgHeight = 500; // 图片高度 /**//// <summary> /// 图片高度 /// </summary> public int ImgHeight { get { return _imgHeight; } set { _imgHeight = value; } } // ----------------------------------------------------------------------------------------- #endregion public Color ImgBgColor //图片背景颜色，默认白色#region public Color ImgBgColor //图片背景颜色，默认白色 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 图片背景颜色，默认白色 /// </summary> private Color _imgBgColor = Color.White; // 图片背景颜色，默认白色 /**//// <summary> /// 图片背景颜色，默认白色 /// </summary> public Color ImgBgColor { set { _imgBgColor = value; } } // ----------------------------------------------------------------------------------------- #endregion public Color ImgBorderColor //图片背景边框颜色，默认黑色#region public Color ImgBorderColor //图片背景边框颜色，默认黑色 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 图片背景边框颜色，默认黑色 /// </summary> private Color _imgBorderColor = Color.Black; // 图片背景边框颜色，默认黑色 /**//// <summary> /// 图片背景边框颜色，默认黑色 /// </summary> public Color ImgBorderColor { set { _imgBorderColor = value; } } // ----------------------------------------------------------------------------------------- #endregion public Color AxisColor //刻度线颜色，默认黑色#region public Color AxisColor //刻度线颜色，默认黑色 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 刻度线颜色，默认黑色 /// </summary> private Color _axisColor = Color.Black; // 刻度线颜色 /**//// <summary> /// 刻度线颜色，默认黑色 /// </summary> public Color AxisColor { set { _axisColor = value; } } // ----------------------------------------------------------------------------------------- #endregion public Color SliceTextColor //刻度文字颜色，默认黑色#region public Color SliceTextColor //刻度文字颜色，默认黑色 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 刻度文字颜色，默认黑色 /// </summary> private Color _sliceTextColor = Color.Black; // 刻度文字颜色，默认黑色 /**//// <summary> /// 刻度文字颜色，默认黑色 /// </summary> public Color SliceTextColor { set { _sliceTextColor = value; } } // ----------------------------------------------------------------------------------------- #endregion public Color AxisTextColor //绘制轴标题的颜色，默认黑色#region public Color AxisTextColor //绘制轴标题的颜色，默认黑色 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 绘制轴标题的颜色，默认黑色 /// </summary> private Color _axisTextColor = Color.Black; // 绘制轴标题的颜色，默认黑色 /**//// <summary> /// 绘制轴标题的颜色，默认黑色 /// </summary> public Color AxisTextColor { set { _axisTextColor = value; } } // ----------------------------------------------------------------------------------------- #endregion public int PaddingWidth //内容边界宽度，默认值=ImgWidth*0.05#region public int PaddingWidth //内容边界宽度，默认值=ImgWidth*0.05 // ----------------------------------------------------------------------------------------- private int paddingwidth = 0; /**//// <summary> /// 内容边界宽度，默认值=ImgWidth*0.05 /// </summary> public int PaddingWidth { get { return paddingwidth; } set { paddingwidth = value; } } // ----------------------------------------------------------------------------------------- #endregion public int PaddingHeight //内容边界高度，默认值=ImgHeight*0.05#region public int PaddingHeight //内容边界高度，默认值=ImgHeight*0.05 // ----------------------------------------------------------------------------------------- private int paddingheight = 0; /**//// <summary> /// 内容边界高度，默认值=ImgWidth*0.05 /// </summary> public int PaddingHeight { get { return paddingheight; } set { paddingheight = value; } } // ----------------------------------------------------------------------------------------- #endregion public int XScaleMultiple //大小刻度的倍数#region public int XScaleMultiple //大小刻度的倍数 // ----------------------------------------------------------------------------------------- private int Xscalemultiple = 3; /**//// <summary> /// 大小刻度的倍数，即几个小刻度一个大刻度，默认为3 /// </summary> public int XScaleMultiple { get { return Xscalemultiple; } set { Xscalemultiple = value; } } // ----------------------------------------------------------------------------------------- #endregion public int XBegin //X轴开始坐标#region public int XBegin //X轴开始坐标 // ----------------------------------------------------------------------------------------- /**//// <summary> /// X轴开始位置 /// </summary> private int _beginX = 0; // X轴开始位置 /**//// <summary> /// X轴开始坐标 /// </summary> public int XBegin { get { return _beginX; } set { _beginX = value; } } // ----------------------------------------------------------------------------------------- #endregion public int YBegin //Y轴开始坐标#region public int YBegin //Y轴开始坐标 // ----------------------------------------------------------------------------------------- /**//// <summary> /// Y轴开始位置 /// </summary> private int _beginY = 0; // Y轴开始位置 /**//// <summary> /// Y轴开始坐标 /// </summary> public int YBegin { get { return _beginY; } set { _beginY = value; } } // ----------------------------------------------------------------------------------------- #endregion] public int YScaleCount //Y轴刻度份数，将Y轴评分成几分，默认为10#region public int YScaleCount //Y轴刻度份数，将Y轴评分成几分，默认为10 // ----------------------------------------------------------------------------------------- /**//// <summary> /// Y轴刻度份数，将Y轴评分成几分，默认为10 /// </summary> private int Yscalecount = 10; /**//// <summary> /// Y轴刻度份数，将Y轴评分成几分，默认为10 /// </summary> public int YScaleCount { get { return Yscalecount; } set { Yscalecount = value; } } // ----------------------------------------------------------------------------------------- #endregion public int YScaleBaseValue //Y轴刻度间隔数值#region public int YScaleBaseValue //Y轴刻度间隔数值 // ----------------------------------------------------------------------------------------- /**//// <summary> /// Y轴刻度间隔数值 /// </summary> private int _yScaleBaseValue; //Y轴刻度间隔数值 /**//// <summary> /// Y轴刻度间隔数值 /// </summary> public int YScaleBaseValue { set { _yScaleBaseValue = value; } } // ----------------------------------------------------------------------------------------- #endregion public string[] XScaleValue //X轴刻度值#region public string[] XScaleValue //X轴刻度值 // ----------------------------------------------------------------------------------------- private string[] _xScalueValue; /**//// <summary> /// X轴刻度值 /// </summary> public string[] XScaleValue { get { return _xScalueValue; } set { _xScalueValue = value; } } // ----------------------------------------------------------------------------------------- #endregion public Font TitleFont //标题字体设置#region public Font TitleFont //标题字体设置 // ----------------------------------------------------------------------------------------- private Font titlefont = new Font("宋体", 15, FontStyle.Regular, GraphicsUnit.Pixel); /**//// <summary> /// 标题字体设置 /// </summary> public Font TitleFont { set { titlefont = value; } } // ----------------------------------------------------------------------------------------- #endregion public Color ImgTitleColor //图片标题文字颜色，默认红色#region public Color ImgTitleColor //图片标题文字颜色，默认红色 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 图片标题文字颜色，默认红色 /// </summary> private Color _imgTitleColor = Color.Red; // 图片标题文字颜色，默认红色 /**//// <summary> /// 图片标题文字颜色，默认红色 /// </summary> public Color ImgTitleColor { set { _imgTitleColor = value; } } // ----------------------------------------------------------------------------------------- #endregion public Font Font //绘制文字的字体，默认宋体12px#region public Font Font //绘制文字的字体，默认宋体12px // ----------------------------------------------------------------------------------------- /**//// <summary> /// 绘制文字的字体，默认宋体12px /// </summary> private Font _font = new Font("宋体", 12, FontStyle.Regular, GraphicsUnit.Pixel); // 绘制文字的字体 /**//// <summary> /// 绘制文字的字体，默认宋体12px /// </summary> public Font Font { set { _font = value; } } // ----------------------------------------------------------------------------------------- #endregion public float Tension //曲线的圆滑度#region public float Tension //曲线的圆滑度 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 曲线的圆滑度，默认 0.45f; /// </summary> private float _tension = 0.45f; // 曲线的圆滑度默认 0.45f; /**//// <summary> /// 曲线的圆滑度，默认 0.45f; /// </summary> public float Tension { set { _tension = value; } } // ----------------------------------------------------------------------------------------- #endregion public Color CurverColor // 曲线颜色，默认黑色#region public Color CurverColor // 曲线颜色，默认黑色 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 曲线颜色，默认黑色 /// </summary> private Color _curveColor = Color.Black; // 曲线颜色，默认黑色 /**//// <summary> /// 曲线颜色，默认黑色 /// </summary> public Color CurverColor { set { _curveColor = value; } } // ----------------------------------------------------------------------------------------- #endregion public float YScaleMaxValue //Y轴刻度最大值#region public float YScaleMaxValue //Y轴刻度最大值 // ----------------------------------------------------------------------------------------- /**//// <summary> /// Y轴刻度最大值 /// </summary> private int _yScaleMaxValue = 0; /**//// <summary> /// Y轴刻度最大值 /// </summary> public int YScaleMaxValue { set { _yScaleMaxValue = value; } } // ----------------------------------------------------------------------------------------- #endregion public float YScaleMinValue //Y轴刻度最小值#region public float YScaleMinValue //Y轴刻度最小值 // ----------------------------------------------------------------------------------------- /**//// <summary> /// Y轴刻度最小值 /// </summary> private int _yScaleMinValue = 0; /**//// <summary> /// Y轴刻度最小值 /// </summary> public int YScaleMinValue { set { _yScaleMinValue = value; } } // ----------------------------------------------------------------------------------------- #endregion // ----------------------------------------------------------------------------------------- #endregion private void InitValue() // 初始化所有数据数值#region private void InitValue() // 初始化所有数据数值 // --------------------------------------------------------------------------------------------- /**//// <summary> /// 初始化所有数据数值 /// </summary> private void InitValue() { //_values = new float[30]; //Random random = new Random(); //for (int i = 0; i < 30; i++) //{ // _values[i] = Convert.ToSingle(random.Next(0, 1000)); //} //{ 0, 120, 300, 90, 100, 134, 130, 160, 0, 70, 100, 120, 130, 120, 90, 12, 66, 78, 300, 400, 89, 65, 34, 23, 34, 25, 67, 23, 45, 78, 120 }; //取得最大与最小值 _yMaxValue = 1f; _yMinValue = 0f; for (int i = 0; i < _values.Length; i++) { _yMaxValue = Math.Max(_yMaxValue, _values[i]); _yMinValue = Math.Min(_yMinValue, _values[i]); } //取得刻度文字的预留长度和高度 _yTextLength = TextImgSize.GetSize(_yMaxValue.ToString(), _font).Width; _xTextHeight = TextImgSize.GetSize(_yMaxValue.ToString(), _font).Height; GetTopAndEnd(_yMaxValue, _yMinValue, out _yScaleMaxValue, out _yScaleMinValue); //取得标题行高 TitleHeight = TextImgSize.GetSize(_imgTitle, titlefont).Height; //设置作图区域边界 paddingwidth = paddingwidth == 0 ? Convert.ToInt32(_imgWidth * 0.05) : paddingwidth; paddingheight = paddingheight == 0 ? Convert.ToInt32(_imgHeight * 0.05) : paddingheight; //设置X轴小刻度数目 //_xMinScaleCount = _values.Length; //设置X轴大刻度数目 _xMaxScaleCount = _xScalueValue.Length-1; //X轴宽度=图片宽度-边界宽*2-上下文字与刻度预留宽度 _xWidth = _imgWidth - paddingwidth * 2 - _yTextLength; //小刻度宽度 _xSmallSpace = _xWidth / _xMinScaleCount; //大刻度宽度=小刻度宽度*倍数 _xBigSpace = _xWidth/_xMaxScaleCount; _yScaleBaseValue = (_yScaleMaxValue - _yScaleMinValue) / Yscalecount; //Y轴高度=图片高度-边界高度*2-Y轴下方刻度文字行高-标题高度 _yHeight = _imgHeight - paddingheight * 2 - _xTextHeight - TitleHeight; _ySpace = _yHeight / Yscalecount; if (_yMaxValue >= Yscalecount) { _ySpaceValue = Convert.ToDecimal(_yMaxValue / Yscalecount); } else { _ySpaceValue = Math.Round((decimal)_yMaxValue / (decimal)10, 1); } Origin_x = _yTextLength+paddingwidth; Origin_y = _imgHeight - _xTextHeight - paddingheight; } // --------------------------------------------------------------------------------------------- #endregion public byte[] DrawCurveGraph() // 绘制曲线图#region public byte[] DrawCurveGraph() // 绘制曲线图 // --------------------------------------------------------------------------------------------- /**//// <summary> /// 绘制整个曲线图 /// </summary> public byte[] DrawCurveGraph() { InitValue(); Bitmap objBitmap = new Bitmap(_imgWidth, _imgHeight, PixelFormat.Format16bppRgb565); Graphics objGraphics = Graphics.FromImage(objBitmap); Pen axisPen = new Pen(new SolidBrush(_axisColor), 1); float FirstPoint_X = 0f; float FirstPoint_Y = 0f; float SecondPoint_X = 0f; float SecondPoint_Y = 0f; // 绘制背景及边框 //objGraphics.DrawRectangle(new Pen(_imgBorderColor, 1), 0, 0, _imgWidth, _imgHeight); objGraphics.FillRectangle(new SolidBrush(_imgBgColor), 0, 0, _imgWidth, _imgHeight); //画Y轴直线 FirstPoint_X = Convert.ToSingle(Origin_x); FirstPoint_Y = Convert.ToSingle(paddingheight + TitleHeight - 5); //FirstPoint_Y = Convert.ToSingle(_imgHeight-paddingheight); SecondPoint_X = Convert.ToSingle(Origin_x); SecondPoint_Y = Convert.ToSingle(Origin_y); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); //画箭头左半边 FirstPoint_X = Convert.ToSingle(Origin_x - 5); FirstPoint_Y = Convert.ToSingle(paddingheight + 5 + TitleHeight - 5); SecondPoint_X = Convert.ToSingle(Origin_x); SecondPoint_Y = Convert.ToSingle(paddingheight + TitleHeight - 5); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); //画箭头右半边 FirstPoint_X = Convert.ToSingle(Origin_x); FirstPoint_Y = Convert.ToSingle(paddingheight + TitleHeight - 5); SecondPoint_X = Convert.ToSingle(Origin_x + 5); SecondPoint_Y = Convert.ToSingle(paddingheight + 5 + TitleHeight - 5); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); //画X轴直线 FirstPoint_X = Convert.ToSingle(Origin_x); FirstPoint_Y = Convert.ToSingle(Origin_y); SecondPoint_X = Convert.ToSingle(Origin_x + _xWidth); SecondPoint_Y = Convert.ToSingle(Origin_y); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); //画箭头上半边 FirstPoint_X = Convert.ToSingle(Origin_x + _xWidth - 5); FirstPoint_Y = Convert.ToSingle(Origin_y - 5); SecondPoint_X = Convert.ToSingle(Origin_x + _xWidth); SecondPoint_Y = Convert.ToSingle(Origin_y); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); //画箭头下半边 FirstPoint_X = Convert.ToSingle(Origin_x + _xWidth - 5); FirstPoint_Y = Convert.ToSingle(Origin_y + 5); SecondPoint_X = Convert.ToSingle(Origin_x + _xWidth); SecondPoint_Y = Convert.ToSingle(Origin_y); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); // 绘制Y轴上的刻度和文字 DrawYAxis(objGraphics); // 绘制X轴上的刻度和文字 DrawXAxis(objGraphics); // 绘制标题 DrawTitle(objGraphics); // 绘制数据曲线 DrawCurve(objGraphics); /**/////擦除Y轴画超出的部分 //objGraphics.FillRectangle(new SolidBrush(_imgBgColor), _beginX, _beginY, _imgWidth - _beginX - 2, _imgHeight - _beginY - 2); // 绘制XY轴向说明文字 DrawAxisText(objGraphics); MemoryStream ms = new MemoryStream(); objBitmap.Save(ms, ImageFormat.Jpeg); return ms.ToArray(); } // --------------------------------------------------------------------------------------------- #endregion public void DrawCurveGraphPutOut(System.Web.HttpResponse response) //画图并直接输出到制定页面#region public void DrawCurveGraphPutOut(System.Web.HttpResponse response) //画图并直接输出到制定页面 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 画图并直接输出到制定页面 /// </summary> /// <param name="response">指定页面的输出流</param> public void DrawCurveGraphPutOut(System.Web.HttpResponse response) { InitValue(); Bitmap objBitmap = new Bitmap(_imgWidth, _imgHeight, PixelFormat.Format16bppRgb565); Graphics objGraphics = Graphics.FromImage(objBitmap); Pen axisPen = new Pen(new SolidBrush(_axisColor), 1); float FirstPoint_X = 0f; float FirstPoint_Y = 0f; float SecondPoint_X = 0f; float SecondPoint_Y = 0f; // 绘制背景及边框 //objGraphics.DrawRectangle(new Pen(_imgBorderColor, 1), 0, 0, _imgWidth, _imgHeight); objGraphics.FillRectangle(new SolidBrush(_imgBgColor), 0, 0, _imgWidth , _imgHeight ); //画Y轴直线 FirstPoint_X = Convert.ToSingle(Origin_x); FirstPoint_Y = Convert.ToSingle(paddingheight + TitleHeight - 5); //FirstPoint_Y = Convert.ToSingle(_imgHeight-paddingheight); SecondPoint_X = Convert.ToSingle(Origin_x); SecondPoint_Y = Convert.ToSingle(Origin_y); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); //画箭头左半边 FirstPoint_X = Convert.ToSingle(Origin_x - 5); FirstPoint_Y = Convert.ToSingle(paddingheight + 5 + TitleHeight - 5); SecondPoint_X = Convert.ToSingle(Origin_x); SecondPoint_Y = Convert.ToSingle(paddingheight + TitleHeight - 5); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); //画箭头右半边 FirstPoint_X = Convert.ToSingle(Origin_x); FirstPoint_Y = Convert.ToSingle(paddingheight + TitleHeight - 5); SecondPoint_X = Convert.ToSingle(Origin_x + 5); SecondPoint_Y = Convert.ToSingle(paddingheight + 5 + TitleHeight - 5); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); //画X轴直线 FirstPoint_X = Convert.ToSingle(Origin_x); FirstPoint_Y = Convert.ToSingle(Origin_y); SecondPoint_X = Convert.ToSingle(Origin_x + _xWidth); SecondPoint_Y = Convert.ToSingle(Origin_y); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); //画箭头上半边 FirstPoint_X = Convert.ToSingle(Origin_x + _xWidth - 5); FirstPoint_Y = Convert.ToSingle(Origin_y - 5); SecondPoint_X = Convert.ToSingle(Origin_x + _xWidth); SecondPoint_Y = Convert.ToSingle(Origin_y); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); //画箭头下半边 FirstPoint_X = Convert.ToSingle(Origin_x + _xWidth - 5); FirstPoint_Y = Convert.ToSingle(Origin_y + 5); SecondPoint_X = Convert.ToSingle(Origin_x + _xWidth); SecondPoint_Y = Convert.ToSingle(Origin_y); objGraphics.DrawLine(axisPen, FirstPoint_X, FirstPoint_Y, SecondPoint_X, SecondPoint_Y); // 绘制Y轴上的刻度和文字 DrawYAxis(objGraphics); // 绘制X轴上的刻度和文字 DrawXAxis(objGraphics); // 绘制标题 DrawTitle(objGraphics); // 绘制数据曲线 DrawCurve(objGraphics); /**/////擦除Y轴画超出的部分 //objGraphics.FillRectangle(new SolidBrush(_imgBgColor), _beginX, _beginY, _imgWidth - _beginX - 2, _imgHeight - _beginY - 2); // 绘制XY轴向说明文字 DrawAxisText(objGraphics); objBitmap.Save(response.OutputStream, ImageFormat.Gif); objGraphics.Dispose(); objBitmap.Dispose(); response.End(); } // ----------------------------------------------------------------------------------------- #endregion private void DrawAxisText(Graphics objGraphics) // 绘制XY轴向说明文字#region private void DrawAxisText(Graphics objGraphics) // 绘制XY轴向说明文字 // --------------------------------------------------------------------------------------------- /**//// <summary> /// 绘制XY轴向说明文字 /// </summary> /// <param name="objGraphics">绘图对象</param> private void DrawAxisText(Graphics objGraphics) { SolidBrush brush = new SolidBrush(_axisTextColor); Size xTextSize = TextImgSize.GetSize(_xTitle, _font); Size yTextSize = TextImgSize.GetSize(_yTitle, _font); objGraphics.DrawString(_xTitle, _font, brush, Origin_x + _xWidth - xTextSize.Width - 2, Origin_y + Convert.ToInt32(_imgHeight * 0.01)); objGraphics.DrawString(_yTitle, _font, brush, Origin_x + 5, paddingheight+TitleHeight-5); } // --------------------------------------------------------------------------------------------- #endregion private void DrawXAxis(Graphics objGraphics) // 绘制X轴刻度和文字#region private void DrawXAxis(Graphics objGraphics) // 绘制X轴刻度和文字 // --------------------------------------------------------------------------------------------- /**//// <summary> /// 绘制X轴刻度和文字 /// </summary> /// <param name="objGraphics">绘图对象</param> private void DrawXAxis(Graphics objGraphics) { int startY = Origin_y - 2; int endY = Origin_y + 2; //文字位置Y轴方向开始坐标=图片高-边界高-刻度预留+文字高 int textStartY = _imgHeight - paddingheight - 4 + _yTextLength; Pen pen = new Pen(new SolidBrush(_axisColor)); SolidBrush brush = new SolidBrush(_sliceTextColor); Size textSize; //遍历所有大刻度数目 for (int i = 0; i < _xMaxScaleCount; i++) { //绘制X轴上的刻度 objGraphics.DrawLine(pen, Origin_x + i * _xBigSpace, Origin_y - 2, Origin_x + i * _xBigSpace, Origin_y + 2); textSize = TextImgSize.GetSize(_xScalueValue[i], _font); //绘制X轴上的值 objGraphics.DrawString(_xScalueValue[i], _font, brush, Origin_x + i * _xBigSpace, Origin_y+Convert.ToInt32(_imgHeight*0.01)); } } // --------------------------------------------------------------------------------------------- #endregion private void DrawYAxis(Graphics objGraphics) // 绘制Y轴刻度和文字#region private void DrawYAxis(Graphics objGraphics) // 绘制Y轴刻度和文字 // --------------------------------------------------------------------------------------------- /**//// <summary> /// 绘制Y轴刻度和文字 /// </summary> /// <param name="objGraphics">绘图对象</param> private void DrawYAxis(Graphics objGraphics) { SolidBrush brush = new SolidBrush(_sliceTextColor); Pen pen = new Pen(new SolidBrush(_axisColor)); Size textSize; decimal value = Convert.ToDecimal(_yMinValue); string text; //遍历 for (int i = 0; i < Yscalecount+1; i++) { if (i > 0) { objGraphics.DrawLine(pen, Origin_x - 4, Origin_y - i * _ySpace, Origin_x, Origin_y - i * _ySpace); value += Convert.ToDecimal(_yScaleBaseValue); } text = value.ToString(); textSize = TextImgSize.GetSize(text, _font); objGraphics.DrawString(text, _font, brush, Origin_x - textSize.Width - 2, Origin_y - i * _ySpace - textSize.Height / 2); } } // --------------------------------------------------------------------------------------------- #endregion private void DrawTitle(Graphics objGraphics) // 绘制标题#region private void DrawTitle(Graphics objGraphics) // 绘制标题 // --------------------------------------------------------------------------------------------- /**//// <summary> /// 绘制标题 /// </summary> /// <param name="objGraphics">绘图对象</param> private void DrawTitle(Graphics objGraphics) { SolidBrush brush = new SolidBrush(_imgTitleColor); Size textSize = TextImgSize.GetSize(_imgTitle, _font); objGraphics.DrawString(_imgTitle, titlefont, brush, (_imgWidth - textSize.Width-paddingwidth*2)/2, 5); } // --------------------------------------------------------------------------------------------- #endregion private void DrawCurve(Graphics objGraphics) // 绘制数据曲线#region private void DrawCurve(Graphics objGraphics) // 绘制数据曲线 // --------------------------------------------------------------------------------------------- /**//// <summary> /// 绘制数据曲线 /// </summary> /// <param name="objGraphics">绘图对象</param> private void DrawCurve(Graphics objGraphics) { Pen curvePen = new Pen(_curveColor, 1); PointF[] curvePointF = null; if (_values.Length > 1) { curvePointF = new PointF[_values.Length]; for (int i = 0; i < _values.Length; i++) { curvePointF[i] = new PointF(Origin_x + i * _xSmallSpace, Origin_y - _yHeight * _values[i] / _yScaleMaxValue); } objGraphics.DrawCurve(curvePen, curvePointF, _tension); } } // --------------------------------------------------------------------------------------------- #endregion private static void GetTopAndEnd(float maxvalue, float minvalue, out int topvalue, out int bottomvalue) //输入最大最小值，返回最高坐标与最低坐标#region private static void GetTopAndEnd(float maxvalue, float minvalue, out int topvalue, out int bottomvalue) //输入最大最小值，返回最高坐标与最低坐标 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 输入最大最小值，返回最高坐标与最低坐标 /// </summary> /// <param name="maxvalue">最大值</param> /// <param name="minvalue">最小值</param> /// <param name="topvalue">最高坐标</param> /// <param name="bottomvalue">最低坐标</param> private static void GetTopAndEnd(float maxvalue, float minvalue, out int topvalue, out int bottomvalue) { int MaxDigit = 1; //最大数的位数 //MaxDigit = Convert.ToInt32(Math.Log10(Convert.ToDouble(maxvalue))); MaxDigit = maxvalue.ToString().Length; //int MinDigit = 1; //最小数的位数 //MinDigit = Math.Log10(Convert.ToDouble(minvalue)) + 1; int BaseValue = Convert.ToInt32(Math.Pow(10, MaxDigit - 1)); //基数 string temp = maxvalue.ToString(); temp = temp.Substring(0, 1); int BigFirstValue = Convert.ToInt32(temp); //大数中最高位的数值 BigFirstValue = BigFirstValue + 1; //最高坐标=大数中最高位的数值*基数 topvalue = BigFirstValue * BaseValue; //如果最小值大于基数 if (minvalue > BaseValue) { temp = minvalue.ToString(); temp = temp.Substring(0, 1); int SmallFirstValue = Convert.ToInt32(temp); //小数中最高位的数值 bottomvalue = SmallFirstValue * BaseValue; } else { bottomvalue = 0; } } // ----------------------------------------------------------------------------------------- #endregion } public class TextImgSize //文字区域的大小#region public class TextImgSize //文字区域的大小 // ----------------------------------------------------------------------------------------- /**//// <summary> /// 文字区域的大小 /// </summary> public class TextImgSize { private static // 静态成员数据区#region private static // 静态成员数据区 // --------------------------------------------------------------------------------------------- private static Graphics _graph = Graphics.FromImage(new Bitmap(1, 1)); // --------------------------------------------------------------------------------------------- #endregion public static TextImgSize GetSize(string text, Font font) // 获取文字图像的大小#region public static TextImgSize GetSize(string text, Font font) // 获取文字图像的大小 // --------------------------------------------------------------------------------------------- /**//// <summary> /// 获取文字图像的大小 /// </summary> /// <param name="text">文字内容</param> /// <param name="font">字体</param> /// <returns>返回文字图像的大小</returns> public static Size GetSize(string text, Font font) { return _graph.MeasureString(text, font).ToSize(); } // --------------------------------------------------------------------------------------------- #endregion } // ----------------------------------------------------------------------------------------- #endregion}
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