using System; 

	using System.Collections.Generic; 

	using System.Linq; 

	using System.Web; 

	 

	using System.Drawing; 

	using System.Drawing.Drawing2D; 

	using System.IO; 

	using System.Drawing.Imaging; 

	using System.Collections; 

	 

	namespace Curve 

	{ 

	public class CurveDrawing 

	{ 

	string title, title2, ytitle, xtitle; 

	/// <summary> 

	/// X坐标的标题 

	/// </summary> 

	public string Xtitle 

	{ 

	get { return xtitle; } 

	set { xtitle = value; } 

	} 

	/// <summary> 

	/// Y坐标的标题 

	/// </summary> 

	public string Ytitle 

	{ 

	get { return ytitle; } 

	set { ytitle = value; } 

	} 

	/// <summary> 

	/// 副标题 

	/// </summary> 

	public string Title2 

	{ 

	get { return title2; } 

	set { title2 = value; } 

	} 

	/// <summary> 

	/// 主标题 

	/// </summary> 

	public string Title 

	{ 

	get { return title; } 

	set { title = value; } 

	} 

	double yMax, yMin; 

	List<ArrayList> itemlist; 

	 

	public CurveDrawing(List<ArrayList> itemlist, string title, string title2 = "") 

	{ 

	this.itemlist = itemlist; 

	this.title = title; 

	this.title2 = title2; 

	 

	yMax = -100000000; 

	yMin = 100000000; 

	for (int i = 0; i < itemlist.Count; i++) 

	{ 

	if (Convert.ToDouble(itemlist[i][1]) > yMax) 

	yMax = Convert.ToDouble(itemlist[i][1]); 

	if (Convert.ToDouble(itemlist[i][1]) < yMin) 

	yMin = Convert.ToDouble(itemlist[i][1]); 

	} 

	} 

	/// <summary> 

	/// 创建并输出图片 

	/// </summary> 

	/// <returns>生成的文件路径</returns> 

	public string Draw() 

	{ 

	#region 基础定义 

	//取得记录数量 

	int count = itemlist.Count; 

	 

	//记算图表宽度 

	int wd = 80 + 50 * (count - 1); 

	//设置最小宽度为640 

	if (wd < 640) wd = 640; 

	//生成Bitmap对像 

	Bitmap img = new Bitmap(wd, 400); 

	//定义黑色画笔 

	Pen Bp = new Pen(Color.Black); 

	//加粗的黑色 

	Pen BBp = new Pen(Color.Black, 2); 

	//定义红色画笔 

	Pen Rp = new Pen(Color.Red); 

	//定义银灰色画笔 

	Pen Sp = new Pen(Color.Silver); 

	//定义大标题字体 

	Font Bfont = new Font("黑体", 12, FontStyle.Bold); 

	//定义一般字体 

	Font font = new Font("Arial", 8); 

	//定义大点的字体 

	Font Tfont = new Font("Arial", 9); 

	//定义黑色过渡型笔刷 

	LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, img.Width, img.Height), Color.Black, Color.Black, 1.2F, true); 

	//定义蓝色过渡型笔刷 

	LinearGradientBrush Bluebrush = new LinearGradientBrush(new Rectangle(0, 0, img.Width, img.Height), Color.Blue, Color.Blue, 1.2F, true); 

	LinearGradientBrush Silverbrush = new LinearGradientBrush(new Rectangle(0, 0, img.Width, img.Height), Color.Silver, Color.Silver, 1.2F, true); 

	#endregion 

	 

	//生成绘图对像 

	try 

	{ 

	using (Graphics g = Graphics.FromImage(img)) 

	{ 

	#region 绘制图表 

	//绘制底色 

	g.DrawRectangle(new Pen(Color.White, 400), 0, 0, img.Width, img.Height); 

	//绘制大标题 

	g.DrawString(title, Bfont, brush, wd / 2 - title.Length * 10, 5); 

	//绘制小标题 

	g.DrawString(title2, Tfont, Silverbrush, wd / 2 - title.Length * 10 + 40, 25); 

	//绘制图片边框 

	g.DrawRectangle(Bp, 0, 0, img.Width - 1, img.Height - 1); 

	 

	//绘制Y坐标线 

	for (int i = 0; i < (count < 12 ? 12 : count); i++) 

	g.DrawLine(Sp, 40 + 50 * i, 60, 40 + 50 * i, 360); 

	//绘制X轴坐标标签 

	for (int i = 0; i < count; i++) 

	g.DrawString(itemlist[i][0].ToString(), font, brush, 30 + 50 * i, 370); 

	//绘制X坐标线 

	for (int i = 0; i < 11; i++) 

	{ 

	g.DrawLine(Sp, 40, 60 + 30 * i, 40 + 50 * ((count < 12 ? 12 : count) - 1), 60 + 30 * i); 

	double s = yMax - (yMax + Math.Abs(yMin)) / 10 * i;//最大的Y坐标值 

	g.DrawString(Math.Floor(s).ToString(), font, brush, 10, 55 + 30 * i); 

	} 

	 

	 

	//绘制Y坐标轴 

	g.DrawLine(BBp, 40, 50, 40, 360); 

	//绘制X坐标轴 

	g.DrawLine(BBp, 40, 360, 40 + 50 * ((count < 12 ? 12 : count) - 1) + 10, 360); 

	 

	#endregion 

	 

	#region 绘制曲线 

	//定义曲线转折点 

	Point[] p = new Point[count]; 

	for (int i = 0; i < count; i++) 

	{ 

	p[i].X = 40 + 50 * i; 

	p[i].Y = 360 - (int)(((Convert.ToDouble(itemlist[i][1]) + Math.Abs(yMin)) / ((yMax + Math.Abs(yMin)) / 10)) * 30); 

	} 

	//绘制发送曲线 

	g.DrawLines(Rp, p); 

	 

	for (int i = 0; i < count; i++) 

	{ 

	//绘制发送记录点的数值 

	g.DrawString(itemlist[i][1].ToString(), font, Bluebrush, p[i].X + 5, p[i].Y - 10); 

	//绘制发送记录点 

	g.DrawRectangle(Rp, p[i].X - 2, p[i].Y - 2, 4, 4); 

	} 

	 

	#endregion 

	 

	//绘制Y坐标标题 

	g.DrawString(ytitle, Tfont, brush, 10, 40); 

	//绘制X坐标标题 

	g.DrawString(xtitle, Tfont, brush, 30, 385); 

	//图片质量 

	g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; 

	//保存绘制的图片 

	string basePath = HttpContext.Current.Server.MapPath("/Curve/"), 

	fileName = Guid.NewGuid() + ".jpg"; 

	 

	using (FileStream fs = new FileStream(basePath + fileName, FileMode.CreateNew)) 

	{ 

	if (!System.IO.Directory.Exists(basePath)) 

	System.IO.Directory.CreateDirectory(basePath); 

	img.Save(fs, ImageFormat.Jpeg); 

	return "/Curve/" + fileName; 

	} 

	} 

	 

	} 

	catch (Exception) 

	{ 

	throw; 

	} 

	 

	} 

	} 

	}