用ASP.NET with C# 绘制曲线图（Curve图）
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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
}
