如何画动态曲线图 把数据库里即时接收到的数据画成动态X-Y图? 请具体指教,谢谢! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 Chart.aspx.cs的代码:using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;using System.Drawing;using System.Drawing.Imaging;namespace aspCharts{////// Chart 的摘要说明。///public class Chart : System.Web.UI.Page{private void Page_Load(object sender, System.EventArgs e){Graphics objGraphics;//建立画板对象Bitmap objBitMap = new Bitmap(600,300);//建立位图对象objGraphics = Graphics.FromImage(objBitMap);//根据位图对象建立画板对象objGraphics.Clear(Color.White);//设置画板对象的背景色int[] arrValues={0,0,0,0,0,0};//数据数组arrValues[0]=50;arrValues[1]=70;arrValues[2]=90;arrValues[3]=100;arrValues[4]=140;arrValues[5]=220;string[] arrValueNames={”0″,”0″,”0″,”0″,”0″,”0″};//月份arrValueNames[0] = “一月”;arrValueNames[1]=”二月”;arrValueNames[2] = “三月”;arrValueNames[3]=”四月”;arrValueNames[4]=”五月”;arrValueNames[5]=”六月”;objGraphics.DrawString(”上半年销售情况统计”,new Font(”宋体”,16),Brushes.Black,new PointF(0,0));//创建图例文字PointF symbolLeg = new PointF(335,20);PointF descLeg = new PointF(360,16);//画出图例。利用objGraphics图形对象的三个方法画出图例://FillRectangle()方法画出填充矩形,DrawRectangle()方法画出矩形的边框,//DrawString()方法画出说明文字。这三个图形对象的方法在 .NET 框架类库类库中均已重载,//可以很方便根据不同的参数来画出图形。for(int i=0;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 j = 0;j{objGraphics.FillRectangle(new SolidBrush(GetColor(j)),(j*35)+15,200-arrValues[j],20,arrValues[j]+5);objGraphics.DrawRectangle(Pens.Black,(j*35)+15,200-arrValues[j],20,arrValues[j]+5);}float sglCurrentAngle;float sglTotalAngle=0;for(int a=0;a{sglTotalAngle += arrValues[a];//取得数据总量}for(int b=0;b{sglCurrentAngle = arrValues[b]/sglTotalAngle*360;//求出该数据所占总数据的百分比objGraphics.FillPie(new SolidBrush(GetColor(b)),220,95,100,100,sglTotalAngle,sglCurrentAngle);//画出椭圆sglTotalAngle+=sglCurrentAngle;}objBitMap.Save(Response.OutputStream,ImageFormat.Gif);//该位图对象以”GIF”格式输出}private 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:default:objColor = Color.Blue;break;}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}} 用按钮从数据库表中取出记录显示在另一张表上 请教一个asp.net Chart 控件的问题,在线等 网络部队 求助 JS预览 Table vs2005 pro版无法单步执行sql server express中的存储过程 datagrid数据导出excel文件,有时出现乱码 Acess删除后为何无刷新; 如果去除这个网页显示时的左侧与顶部边距 ASP.NET 程序急求高手帮忙看下~ 先谢谢了~ 这是什么意思?各位帮帮我吧! MSDN也有错 好像是.net的一个bug,oracletransaction无效,请大家测试
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Drawing.Imaging;
namespace aspCharts
{
///
/// Chart 的摘要说明。
///
public class Chart : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e)
{Graphics objGraphics;//建立画板对象
Bitmap objBitMap = new Bitmap(600,300);//建立位图对象
objGraphics = Graphics.FromImage(objBitMap);//根据位图对象建立画板对象
objGraphics.Clear(Color.White);//设置画板对象的背景色
int[] arrValues={0,0,0,0,0,0};//数据数组
arrValues[0]=50;
arrValues[1]=70;
arrValues[2]=90;
arrValues[3]=100;
arrValues[4]=140;
arrValues[5]=220;
string[] arrValueNames={”0″,”0″,”0″,”0″,”0″,”0″};//月份arrValueNames[0] = “一月”;
arrValueNames[1]=”二月”;
arrValueNames[2] = “三月”;
arrValueNames[3]=”四月”;
arrValueNames[4]=”五月”;
arrValueNames[5]=”六月”;objGraphics.DrawString(”上半年销售情况统计”,new Font(”宋体”,16),Brushes.Black,new PointF(0,0));//创建图例文字
PointF symbolLeg = new PointF(335,20);
PointF descLeg = new PointF(360,16);//画出图例。利用objGraphics图形对象的三个方法画出图例:
//FillRectangle()方法画出填充矩形,DrawRectangle()方法画出矩形的边框,
//DrawString()方法画出说明文字。这三个图形对象的方法在 .NET 框架类库类库中均已重载,
//可以很方便根据不同的参数来画出图形。for(int i=0;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 j = 0;j
{
objGraphics.FillRectangle(new SolidBrush(GetColor(j)),(j*35)+15,200-arrValues[j],20,arrValues[j]+5);
objGraphics.DrawRectangle(Pens.Black,(j*35)+15,200-arrValues[j],20,arrValues[j]+5);
}float sglCurrentAngle;
float sglTotalAngle=0;for(int a=0;a
{
sglTotalAngle += arrValues[a];//取得数据总量
}for(int b=0;b
{
sglCurrentAngle = arrValues[b]/sglTotalAngle*360;//求出该数据所占总数据的百分比
objGraphics.FillPie(new SolidBrush(GetColor(b)),220,95,100,100,sglTotalAngle,sglCurrentAngle);//画出椭圆
sglTotalAngle+=sglCurrentAngle;
}objBitMap.Save(Response.OutputStream,ImageFormat.Gif);//该位图对象以”GIF”格式输出}private 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:default:
objColor = Color.Blue;
break;
}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
}
}