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分享web 方式的怎么做实时曲线图，谢谢各位了
web 方式的怎么做实时曲线图，谢谢各位了。该用什么怎么做，如果有demo的话 请发liu980_980@163.com 里，谢谢了
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红街咖啡 2009-09-09
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用下面的代码可以获取CPU所有的计数器
System.Diagnostics.PerformanceCounterCategory mycat = new
System.Diagnostics.PerformanceCounterCategory("Process");
用counter.NextValue()去获取每一个计数器当前的值
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Drawing2D;
namespace CNPOPSOFT.Controls
{
[Serializable]
public class CustomRectangle
{
public CustomRectangle()
{
}
public CustomRectangle(float x, float y, float width, float height)
{
this.x = x;
this.y = y;
this.width = width;
this.height = height;
}
#region 属性定义区
private float x;
/// <summary>
/// X坐标
/// </summary>
public float X
{
get { return x; }
set { x = value; }
}
private float y;
/// <summary>
/// Y坐标
/// </summary>
public float Y
{
get { return y; }
set { y = value; }
}
/// <summary>
/// X坐标
/// </summary>
public float Left
{
get { return x; }
set { x = value; }
}
/// <summary>
/// Y坐标
/// </summary>
public float Top
{
get { return y; }
set { y = value; }
}
private float width;
/// <summary>
/// 宽度
/// </summary>
public float Width
{
get { return width; }
set { width = value; }
}
private float height;
/// <summary>
/// 高度
/// </summary>
public float Height
{
get { return height; }
set { height = value; }
}
/// <summary>
/// 返回右边X轴坐标（等于X+Width）
/// </summary>
public float Right
{
get { return x + width; }
}
/// <summary>
/// 返回底部Y轴坐标（等于Y+Height）
/// </summary>
public float Bottom
{
get { return y + height; }
}
/// <summary>
/// 返回矩形中点
/// </summary>
public CustomPoint CenterPoint
{
get { return new CustomPoint(x + width / 2, y + height / 2); }
}
#endregion
#region 方法区
/// <summary>
/// 返回一个克隆的对象
/// </summary>
/// <returns></returns>
public CustomRectangle Clone()
{
return new CustomRectangle(x, y, width, height);
}
/// <summary>
/// 转化为Rectangle对象
/// </summary>
/// <returns></returns>
public Rectangle ToRectangle()
{
return new Rectangle((int)x, (int)y, (int)width, (int)height);
}
/// <summary>
/// 转化为RectangleF对象
/// </summary>
/// <returns></returns>
public RectangleF ToRectangleF()
{
return new RectangleF(x, y, width, height);
}
/// <summary>
/// 返回一个左上角坐标点
/// </summary>
/// <returns></returns>
public Point ToPoint()
{
return new Point((int)x, (int)y);
}
/// <summary>
/// 返回一个左上角坐标点
/// </summary>
/// <returns></returns>
public PointF ToPointF()
{
return new PointF(x, y);
}
/// <summary>
/// 判断指定坐标的点是否在矩形内部
/// </summary>
/// <param name="ptX">X坐标</param>
/// <param name="ptY">Y坐标</param>
/// <returns></returns>
public bool IsPointInRectangle(int ptX, int ptY)
{
return (ptX >= x && ptX <= (x + width) && ptY >= y && ptY <= (y + height));
}
/// <summary>
/// 判断指定坐标的点是否在矩形内部
/// </summary>
/// <param name="ptX">X坐标</param>
/// <param name="ptY">Y坐标</param>
/// <returns></returns>
public bool IsPointFInRectangle(float ptX, float ptY)
{
return (ptX >= x && ptX <= (x + width) && ptY >= y && ptY <= (y + height));
}
public static CustomRectangle ToCustomRectangle(RectangleF re)
{
CustomRectangle cus = new CustomRectangle();
cus.X = re.X;
cus.Y = re.Y;
cus.Width = re.Width;
cus.Height = re.Height;
return cus;
}
/// <summary>
/// 根据Rectangle产生一个CustomRectangle对象
/// </summary>
/// <param name="rect"></param>
/// <returns></returns>
public static CustomRectangle FromRectangle(Rectangle rect)
{
return new CustomRectangle(rect.Left, rect.Top, rect.Width, rect.Height);
}
/// <summary>
/// 根据RectangleF产生一个CustomRectangle对象
/// </summary>
/// <param name="rect"></param>
/// <returns></returns>
public static CustomRectangle FromRectangleF(RectangleF rect)
{
return new CustomRectangle(rect.Left, rect.Top, rect.Width, rect.Height);
}
/// <summary>
/// 获取边框的圆角矩形路径（用于绘图）
/// </summary>
/// <returns></returns>
public GraphicsPath GetRoundRectBorderPath(float radus)
{
GraphicsPath path = new GraphicsPath();
path.AddArc(x, y, radus * 2, radus * 2, 180, 90);
path.AddArc(Right - radus * 2, y, radus * 2, radus * 2, 270, 90);
path.AddArc(Right - radus * 2, Bottom - radus * 2, radus * 2, radus * 2, 0, 90);
path.AddArc(x, Bottom - radus * 2, radus * 2, radus * 2, 90, 90);
path.CloseFigure();
return path;
}
/// <summary>
/// 获取六边形绘图路径
/// </summary>
/// <returns></returns>
public GraphicsPath GetHexagonBorderPath()
{
GraphicsPath path = new GraphicsPath();
List<PointF> pts = new List<PointF>();
pts.Add(new PointF(x + width / 2f, y));
pts.Add(new PointF(Right, y + height / 4f));
pts.Add(new PointF(Right, y + height * 3f / 4f));
pts.Add(new PointF(x + width / 2f, Bottom));
pts.Add(new PointF(x, y + height * 3f / 4f));
pts.Add(new PointF(x, y + height / 4f));
path.AddPolygon(pts.ToArray());
return path;
}
/// <summary>
/// 获取倒三角形路径
/// </summary>
/// <returns></returns>
public GraphicsPath GetTrianglePath()
{
GraphicsPath path = new GraphicsPath();
List<PointF> pts = new List<PointF>();
pts.Add(new PointF(x, y));
pts.Add(new PointF(Right, y));
pts.Add(new PointF(x + width / 2f, Bottom));
path.AddPolygon(pts.ToArray());
return path;
}
/// <summary>
/// 根据鼠标位置确定高亮区域，1、2、3、4表示中间4个区域，其他为-1
/// </summary>
/// <param name="pt"></param>
/// <returns></returns>
public int GetHotPosition(Point pt)
{
Point pt1, pt2, pt3, pt4, pt0;
pt1 = new Point((int)(x + width / 6), (int)(y + height / 6));
pt2 = new Point((int)(Right - width / 6), (int)(y + height / 6));
pt3 = new Point((int)(Right - width / 6), (int)(Bottom - height / 6));
pt4 = new Point((int)(x + width / 6), (int)(Bottom - height / 6));
pt0 = CenterPoint.ToPoint();
GraphicsPath path1 = new GraphicsPath();
path1.AddPolygon(new Point[] { pt1, pt2, pt0 });
if (path1.IsVisible(pt)) return 1;
GraphicsPath path2 = new GraphicsPath();
path2.AddPolygon(new Point[] { pt2, pt3, pt0 });
if (path2.IsVisible(pt)) return 2;
GraphicsPath path3 = new GraphicsPath();
path3.AddPolygon(new Point[] { pt3, pt4, pt0 });
if (path3.IsVisible(pt)) return 3;
GraphicsPath path4 = new GraphicsPath();
path4.AddPolygon(new Point[] { pt4, pt1, pt0 });
if (path4.IsVisible(pt)) return 4;
return -1;
}
/// <summary>
/// 获取高亮矩形区域
/// </summary>
/// <param name="hotPosition">1,2,3,4；0表示全选</param>
/// <returns></returns>
public Rectangle GetSubRectangle(int hotPosition)
{
if (hotPosition == 1)
return new Rectangle((int)x, (int)y, (int)width, (int)(height / 2));
else if (hotPosition == 2)
return new Rectangle((int)(x + width / 2), (int)y, (int)(width / 2), (int)height);
else if (hotPosition == 3)
return new Rectangle((int)x, (int)(y + height / 2), (int)width, (int)(height / 2));
else if (hotPosition == 4)
return new Rectangle((int)x, (int)y, (int)(width / 2), (int)height);
else
return ToRectangle();
}
#endregion
}
}
wuyq11 2009-09-09
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用zedgraph等控件
也可Ajax定时刷新图片
或VML
http://topic.csdn.net/u/20080819/16/91d6daf7-4473-4699-b2f1-969c54e7cb77.html
也可Ajax定时刷新图片
或VML
http://topic.csdn.net/u/20080819/16/91d6daf7-4473-4699-b2f1-969c54e7cb77.html
mengxj85 2009-09-09
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一般用第三方控件实现吧
zhanghe100 2009-09-09
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用EXT
IHandler 2009-09-09
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用JS的SetTimeOut定时用AJAX读取数据重新生成图表
DEMO 没有
DEMO 没有
