using System; using System.Drawing; //HttpUtility.UrlEncode /// <summary> ///Curve 的摘要说明 /// </summary> public class Curve { public Curve() { // //TODO: 在此处添加构造函数逻辑 // } /*******************************************************属性设置**************************************************************/ /// <summary> /// 房价数组 /// </summary> private string[] _CurveData; /// <summary> /// 房价时间 /// </summary> //private string[] _CurveDate; public string[] CurveData { get { return _CurveData; } set { _CurveData = value; } } //public string[] CurveDate //{ // get { return _CurveDate; } // set { _CurveDate = value; } //} /// <summary> /// 是否显示曲线 /// </summary> private bool _IsDemonstrationCurve=true; public bool IsDemonstrationCurve { get { return _IsDemonstrationCurve;} set { if(value==false) { _IsDemonstrationCurve = false; }else { _IsDemonstrationCurve = true; } } } /// <summary> /// 是否显示 矩形图 /// </summary> private bool _IsDemonstrationRectangle=true; public bool IsDemonstrationRectangle { get { return _IsDemonstrationRectangle; } set { if(value==false) { _IsDemonstrationRectangle = false; }else { _IsDemonstrationRectangle = true; } } } /*****************************************属性设置结束***********************************************************************************/ public bool getCurve(string FileName) { try { /***********************大图的参数*****************************/ /*自写编码*/ int ImgWidth = 900; //1.[总宽度] ***图宽度 int ImgHeight = 550; //2.[总高度] ***图高度 int ItemNum = 1; //3.[项目数量] ***图表划分的块 //int ChildSpace=15; //6.[各块间的间距] int ChartLeft = 80; //7.[图表左边距] ***图表距图的左边距离 int ChartRight = 50; //8.[图表右边距] ***图表距图的右边距离 int ChartTop = 50; //9.[图表顶边距] ***图表距图顶边距离 int ChartBottom = 50; //10.[图表底边距] ***图表距图底边距离 /*************************坐标位置调整******************************************/ int YMaxValue = 8000; //11.[纵坐标标尺最大值] ***纵坐标标尺的最大值 int YItemNum = 15; //12.[纵坐标标尺段数] ***纵坐标标尺的段数 int YTop = 15; //13.[距纵轴顶端间隔] int YStrStart = 35; //14.[纵坐标标尺文字起始X坐标] int XRight = 15; //15.[距横轴右端间隔] int XStrStart = 20; //16.[横坐标标尺文字起始Y坐标] /*************************小刻度位置调整*********************************/ int ChildNum = 4; //4.[块数] ***大块中划分的子项的数量 float ChildRate = 0.6f; //5.[各块总占空间比率] int xiaoSpacing = 80; //小标示和小刻度之间的距离 int Xxiaospace_between = 35; //矩形距离小刻度的位置 int intjiange = 300; //顶部名称说明距离 左边的距离 string[] strGIFName = new string[ItemNum]; //大标示 注意和项目个数有联系 //string strGIFName = "2009年价格走势图"; /*因为 最近要换 所以 只有今年的*/ for (int intGIF = 1; intGIF <= ItemNum; intGIF++) { strGIFName[intGIF - 1] = 2008 + intGIF + "年价格走势图"; // arrValueNames[1] = "2010年价格走势图"; // arrValueNames[2] = "2011年价格走势图"; } /*****************************各项数值的计算****************************************/ //[图表总宽度]=[总宽度]-[图表左边距]-[图表右边距]-[距横轴右端间隔] int chartwidth = ImgWidth - ChartLeft - ChartRight - XRight; //[项目宽度]=[图表总宽度]/[项目数量] int itemwidth = chartwidth/ItemNum; //[各块总占空间比率的实际宽度]=[项目宽度]*[各块总占空间比率] int factwidth = Convert.ToInt32(Math.Floor(itemwidth*ChildRate)); //[各块矩形宽度]=[各块总占空间比率的实际宽度]/[块数] int rectanglewidth = factwidth/ChildNum; //[各块间的间距]=([项目宽度]-[各块总占空间比率的实际宽度])/([块数]+1) int falge = ((itemwidth - factwidth)/(ChildNum + 1)); decimal myFale = falge; int childspace = Convert.ToInt32(Math.Floor(myFale)); //(itemwidth-factwidth)/(ChildNum+1) /***********************************开始画图******************************************************/ Graphics objGps; //建立画板对象 Bitmap objBitMap = new Bitmap(ImgWidth, ImgHeight); //建立位图对象 objGps = Graphics.FromImage(objBitMap); //根据位图对象建立画板对象 objGps.Clear(Color.White); //设置画板对象的背景色 /***************************横坐标设置*************************************************/ string[] strArrValueName = new string[ChildNum]; //标示名称(月份) 注意长度要和ChildNum 相同 //横坐标设置 for (int intquarter = 1; intquarter <= strArrValueName.Length; intquarter++) { if (intquarter%4 == 1) { strArrValueName[intquarter - 1] = "1~3月"; } if (intquarter%4 == 2) { strArrValueName[intquarter - 1] = "4~6月"; } if (intquarter%4 == 3) { strArrValueName[intquarter - 1] = "7~9月"; } if (intquarter%4 == 0) { strArrValueName[intquarter - 1] = "10~12月"; } } /****************************数据的赋值*******************************/ /*********************************************************************/ //显示的数据 int[] arrValues = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; //数据数组 //CurveData for (int inttheNum = 0; inttheNum <ChildNum; inttheNum++) { /* (ImgHeight - ChartBottom - ChartTop - YTop)/YItemNum*i 纵坐标的计算方法 */ //ImgHeight - ChartBottom - ChartTop - YTop 总高度-距离顶部高度-距离底部高度-y坐标距离顶部高度/标示个数个数=单个坐标的高度 // ImgHeight - ChartBottom-单个坐标的高度 总高度-距离底部高度-单个项目的高度 double dange = (ImgHeight - ChartBottom - ChartTop - YTop)/YItemNum; //单个高度的计算 double floatfalge = (double.Parse(CurveData[inttheNum])) * dange; // double floatfalge = (ImgHeight - ChartBottom - ChartTop - YTop)*(inttheNum + 1)*400/YMaxValue; arrValues[inttheNum] = Convert.ToInt32(Math.Floor(floatfalge)); } /***************************************纵坐标显示标示设置*******************************************/ //string[] arrValueNames = {"0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0"}; string[] arrValueNames = new string[YItemNum]; //这里表示所有的纵坐标的标示度名称 for (int intValueName = 0; intValueName < arrValueNames.Length; intValueName++) { arrValueNames[intValueName] = ((intValueName*500) + 2000).ToString(); } //得出矩形宽度，和画图X轴位置 //[项目宽度]=[总宽度]/[项目数量] //======[各块总占空间比率]=（[各块矩形宽度]+[各块间的间距]）/[项目宽度] //[各块总占空间比率的实际宽度]=[项目宽度]*[各块总占空间比率] //[各块矩形宽度]=（[各块总占空间比率的实际宽度]-[各块间的间距]*（[块数]））/[块数] //[一边空余空间宽度]=（[项目宽度]-[各块所占空间比率的总宽度]）/2 System.Drawing.Point[] pi = new Point[arrValues.Length]; //定义折线点的对象数组 System.Drawing.Point[] pit = new Point[3]; //定义坐标三角点的对象数组 System.Drawing.Pen pe = new Pen(new SolidBrush(GetColor(7)), 1f); //定义画直线的对象 //画纵轴 objGps.DrawLine(pe, new Point(ChartLeft, ImgHeight - ChartBottom), new Point(ChartLeft, ChartTop)); //画纵轴终点箭头 pit[0].X = ImgWidth - ChartRight; //确定三角形三点的位置 pit[0].Y = ImgHeight - ChartBottom - 4; pit[1].X = ImgWidth - ChartRight; pit[1].Y = ImgHeight - ChartBottom + 4; pit[2].X = ImgWidth - ChartRight + 10; pit[2].Y = ImgHeight - ChartBottom; objGps.FillPolygon(new SolidBrush(GetColor(7)), pit); //画纵轴标尺和标尺描述 for (int i = 1; i <= YItemNum; i++) { //画标尺 objGps.DrawLine(pe, new PointF(ChartLeft, ImgHeight - ChartBottom - (ImgHeight - ChartBottom - ChartTop - YTop)/YItemNum*i), new PointF(ChartLeft - 5, ImgHeight - ChartBottom - (ImgHeight - ChartBottom - ChartTop - YTop)/YItemNum*i)); //画描述 objGps.DrawString(arrValueNames[i - 1].ToString(), new Font("宋体", 10), Brushes.Black, new Point(YStrStart, ImgHeight - ChartBottom - (ImgHeight - ChartBottom - ChartTop - YTop)/YItemNum*i - 5)); } //画横轴 objGps.DrawLine(pe, new Point(ChartLeft, ImgHeight - ChartBottom), new Point(ImgWidth - ChartRight, ImgHeight - ChartBottom)); //画横轴终点箭头 pit[0].X = ChartLeft - 3; //确定三角形三点的位置 pit[0].Y = ChartTop; pit[1].X = ChartLeft + 3; pit[1].Y = ChartTop; pit[2].X = ChartLeft; pit[2].Y = ChartTop - 10; objGps.FillPolygon(new SolidBrush(GetColor(7)), pit); //画横轴标尺和标尺描述 arrValueNames = strGIFName; for (int i = 1; i <= ItemNum; i++) { //i表示画的 第几个 ImgHeight - ChartBottom + 5 表示线的长度 //pe 表示pen 定义的一只笔 // ChartLeft + itemwidth * i, ImgHeight - ChartBottom 横坐标=左边距+显示个数 ImgHeight - ChartBottom纵坐标=图片总高度-底边距离 objGps.DrawLine(pe, new PointF(ChartLeft + itemwidth*i, ImgHeight - ChartBottom), new PointF(ChartLeft + itemwidth*i, ImgHeight - ChartBottom + 10)); //画横坐标大刻度 //画小刻度和标示 for (int j = 1; j <= ChildNum; j++) { // float widthX; //定义起点和重点的横坐标 widthX = ChartLeft + itemwidth*j/ChildNum + (i - 1)*itemwidth; //画小的刻度 objGps.DrawLine(pe, new PointF(widthX, ImgHeight - ChartBottom), new PointF(widthX, ImgHeight - ChartBottom + 3)); //画小标示 //arrValueNames[] // ChartLeft + childspace + itemwidth * (i - 1) 横坐标=左边距+间隔+个数 int widthxiao; widthxiao = ChartLeft + xiaoSpacing + itemwidth*(j - 1)/ChildNum + itemwidth*(i - 1); objGps.DrawString(strArrValueName[j - 1].ToString(), new Font("宋体", 9), Brushes.Blue, new Point(widthxiao, ImgHeight - ChartBottom + XStrStart - 12)); } objGps.DrawString(arrValueNames[i - 1].ToString(), new Font("宋体", 12), Brushes.Black, new Point(ChartLeft + intjiange + itemwidth*(i - 1), ImgHeight - ChartBottom + XStrStart)); } //框架完成 开始画图 for (int intfalge = 1; intfalge <= ItemNum; intfalge++) { for (int j = 0; j < ChildNum; j++) //画矩形图和折线图 { int theintwidth = 0; //左边距+各块间距 theintwidth = ChartLeft + itemwidth * j / ChildNum + Xxiaospace_between + (intfalge - 1) * itemwidth; if(IsDemonstrationRectangle==true) { //画矩形 //5表示距离小刻度的位置 //j * (childspace + rectanglewidth)) + childspace + ChartLeft //画矩形里面的颜色 objGps.FillRectangle(new SolidBrush(GetColor(j)), theintwidth, ImgHeight - ChartBottom - arrValues[j], rectanglewidth, arrValues[j]); //画矩形外框 objGps.DrawRectangle(Pens.Black, theintwidth, ImgHeight - ChartBottom - arrValues[j], rectanglewidth, arrValues[j]); } //********************************画折线图**************************************************** if(IsDemonstrationCurve==true) { // pi[j].X = (j * (childspace + rectanglewidth)) + childspace + ChartLeft; pi[j].X = theintwidth; //定义折线的横坐标 pi[j].Y = ImgHeight - ChartBottom - arrValues[j]; //纵坐标=图片总高度-底部高度-实际数值 pe.SetLineCap(System.Drawing.Drawing2D.LineCap.RoundAnchor, System.Drawing.Drawing2D.LineCap.RoundAnchor, System.Drawing.Drawing2D.DashCap.Round); if (j > 0) //进行连线 { objGps.DrawLine(pe, pi[j - 1], pi[j]); } } } } //objBitMap.Save(Response.OutputStream, ImageFormat.Gif);//该位图对象以"GIF"格式输出 //objBitMap.Save();//进行保存 System.Web.HttpServerUtility myServer = System.Web.HttpContext.Current.Server; string strPath= myServer.MapPath("~/CurveGIF/"); //string strPath = System.Web.HttpContext.Current.Request.PhysicalApplicationPath.ToString() + //"/CurveGIF/"+FileName+".gif"; objBitMap.Save(strPath+FileName+".gif"); pe.Dispose(); objBitMap.Dispose(); GC.Collect(); //资源释放 垃圾回收 return true; }catch(Exception ex) { return false; } } /**/ /// <param name="itemIndex">系统定义的颜色，有效值0到7，分别为（Blue，Yellow，Red，Orange，Purple，Brown，Pink，Black）</param> /// <returns></returns> public static Color GetColor(int itemIndex) { Color objColor = new Color(); switch (itemIndex) { case 0: objColor = Color.Blue; break; case 1: objColor = Color.Yellow; break; case 2: objColor = Color.Red; break; case 3: objColor = Color.Orange; break; case 4: objColor = Color.Purple; break; case 5: objColor = Color.Brown; break; case 6: objColor = Color.Pink; break; case 7: objColor = Color.Peru; break; case 8: objColor = Color.PowderBlue; break; case 9: objColor = Color.RosyBrown; break; case 10: objColor = Color.RoyalBlue; break; case 11: objColor = Color.SaddleBrown; break; case 12: objColor = Color.SeaGreen; break; default: objColor = Color.Black; break; } return objColor; } /**/ /// <param name="red">自定义颜色红色分量值，有效值0到255</param> /// <param name="green">自定义颜色绿色分量值，有效值0到255</param> /// <param name="blue">自定义颜色蓝色分量值，有效值0到255</param> /// <returns></returns> public static Color GetColor(int red, int green, int blue) { Color objColor = new Color(); objColor = Color.FromArgb(red, green, blue); return objColor; } }
然后这里是 调用的方法：
Curve myCurve = new Curve(); /**设置参数**/ myCurve.IsDemonstrationCurve = true; //是否显示曲折线 myCurve.IsDemonstrationRectangle = false;//是否显示矩形 string[] strValue = {"2","3","1","1.5"};//显示的数据 现在只能显示4 个 myCurve.CurveData = strValue; //赋值 myCurve.getCurve(Guid.NewGuid().ToString());//创建GIF 保存 Response.Write("GIF生成成功!");
不过要注意的是 需要建立文件夹
出处：http://blog.csdn.net/jacky4955/article/details/4061658