在ASP.NET中动态创建柱状图和饼图
2007-12-15 09:30:33 来源:WEB开发网核心提示:本文评论(Comments):为了保护您的电子邮件不被骚扰,地址中的个别符号转换成了全角字符! 评论人:enjsky电子邮件:gzj114@163.com评论日期:2004年08月31日 04:07:45 在饼状图上如何标示数据 的我已经解决了,在ASP.NET中动态创建柱状图和饼图(2),发给大家看一下,学习....
本文评论(Comments):为了保护您的电子邮件不被骚扰,地址中的个别符号转换成了全角字符! | |||
评论人:enjsky | 电子邮件:gzj114@163.com | 评论日期:2004年08月31日 04:07:45 | |
在饼状图上如何标示数据 的我已经解决了,发给大家看一下,学习.... C#代码如下: namespace per_mang { using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; using System.Drawing.Imaging; /// /// Chart 的摘要说明。 /// public class Chart : System.Web.UI.Page { private void Page_Load(object sender, System.EventArgs e) { // 在此处放置用户代码以初始化页面 Bitmap objBitMap = new Bitmap(700, 500); Graphics objGraphics; objGraphics = Graphics.FromImage(objBitMap); objGraphics.Clear(Color.White); StringFormat drawFormat = new System.Drawing.StringFormat(StringFormatFlags.DirectionVertical); StringFormat drawFormat1 = new System.Drawing.StringFormat(StringFormatFlags.DisplayFormatControl); int[] arrValues = {300,135,115,125,75,120}; string[] arrValueNames = new string[]{"一月","二月","三月","四月","五月","六月"}; objGraphics.DrawString(" X 公司上半年销售情况", new Font("宋体", 16), Brushes.Black,200,0,drawFormat1); PointF symbolLeg = new PointF(500, 20); PointF descLeg = new PointF(560, 16); //显示什么颜色代表什么的 for (int i = 0; i < arrValueNames.Length; i++) { objGraphics.FillRectangle(new SolidBrush(GetColor(i)), symbolLeg.X, symbolLeg.Y, 20, 10); objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20, 10); objGraphics.DrawString(arrValueNames[i].ToString(), new Font("宋体", 10), Brushes.Black, descLeg); symbolLeg.Y += 15; descLeg.Y += 15; } for (int i = 0; i < arrValues.Length; i++) { objGraphics.FillRectangle(new SolidBrush(GetColor(i)), (i * 35) + 15, 400 - arrValues[i], 20, arrValues[i] + 5); objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 400 - arrValues[i], 20, arrValues[i] + 5); objGraphics.DrawString(arrValueNames[i].ToString() + "【"+ arrValues[i].ToString()+"】", new Font("宋体", 10), Brushes.Black,(i * 35) + 15,310 - arrValues[i], drawFormat); } float sglCurrentAngle = 0; float sglTotalAngle = 0; float sglTotalValues = 0; for (int i = 0; i <= arrValues.Length - 1; i++) { sglTotalValues += arrValues[i]; } for (int i = 0; i < arrValues.Length; i++) { sglCurrentAngle = arrValues[i] / sglTotalValues * 360; objGraphics.FillPie(new SolidBrush(GetColor(i)), 420, 300, 100, 100, sglTotalAngle, sglCurrentAngle); objGraphics.DrawPie(Pens.Black, 420, 300, 100, 100, sglTotalAngle, sglCurrentAngle); sglTotalAngle += sglCurrentAngle; } objBitMap.Save(Response.OutputStream, ImageFormat.Gif); } private Color GetColor(int itemIndex) { Color objColor; if (itemIndex == 0) { objColor = Color.Blue; } else if (itemIndex == 1) { objColor = Color.Red; } else if (itemIndex == 2) { objColor = Color.Yellow; } else if (itemIndex == 3) { objColor = Color.Purple; } else if (itemIndex == 4) { objColor = Color.Orange; } else if (itemIndex == 5) { objColor = Color.Brown; } else if (itemIndex == 6) { objColor = Color.Gray; } else if (itemIndex == 7) { objColor = Color.Maroon; } else if (itemIndex == 8) { objColor = Color.Maroon; } else { objColor = Color.Blue; } return objColor; } #region Web 窗体设计器生成的代码 override protected void OnInit(EventArgs e) { // // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。 // InitializeComponent(); base.OnInit(e); } /// /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// private void InitializeComponent() { this.Load += new System.EventHandler(this.Page_Load); } #endregion } } |
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