c#winform实现动态曲线图

[czc123456789]

这个曲线图就想股票那种曲线能从数据库里检查数量，曲线改变出来

[zhouqingprsc]

我以前写过一个DLL。太长这里贴不上来。你要的话回复个邮件地址，我可以发给你。

[fengling2001]

看看zedgraph

[czc123456789]

我的邮箱[e-mail] 谢谢你发给我

[wuyq11]

zedgraph
参考

[zhouqingprsc]

发了

[czc123456789]

看不懂捏！ 不懂怎么用啊！~ 不过还是很感谢

[zhouqingprsc]

新建一个windows窗体控件库，把代码贴进去。添加一个picturebox编译后，在你的应用里引用这个dll，然后就和其他控件一样用就行了。

[萤火架构]

可以自己画线 有点原始

[wartim]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication9
{
    public partial class Form1 : Form
    {
        List<Point> Points = new List<Point>();
        Bitmap OrgBmp = null;
        int Start = 0;
        Random R = new Random();
        PictureBox PB = new PictureBox();

        public Form1()
        {
            InitializeComponent();

            PB.Parent = this;
            PB.Dock = DockStyle.Fill;

            OrgBmp = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height);
            using (Graphics G = Graphics.FromImage(OrgBmp))
            {
                G.Clear(Color.Black);
                G.DrawString("随机曲线图", this.Font, Brushes.Green, new PointF(0, 0));
            }
            PB.Image = OrgBmp;

            Timer T = new Timer();
            T.Interval = 100;
            T.Tick += new EventHandler(T_Tick);
            T.Enabled = true;
        }

        void T_Tick(object sender, EventArgs e)
        {
            Bitmap CacheBmp = new Bitmap(OrgBmp);
            Points.Add(new Point(Start ++*5, 100 + 50 - R.Next(50 * 2)));

            if (Points.Count > 1)
                using (Graphics G = Graphics.FromImage(CacheBmp))
                    G.DrawCurve(Pens.Red, Points.ToArray());

            PB.Image = CacheBmp;
        }
    }
}

[xiaoxin0809]

想要实现效果比较好的还是去找一个现成的控件吧，网上有很多，不过大部分是在项目中正式使用要收费的。

[Jave.Lin]

学习。

[patrickpan]

NPlot, 免费开源的,我正在用.

[zhongzhengfeng]

版主，也发一个给我，[e-mail],谢谢！

[iamlicheng]

也给我发一份啊，非常感谢 [e-mail]

[han779684901]

也发一个给我邮箱[e-mail]

[萌忱骞爱]

using System;
using System.IO;//用于文件存取
using System.Data;//用于数据访问
using System.Drawing;//提供画GDI+图形的基本功能
using System.Drawing.Text;//提供画GDI+图形的高级功能
using System.Drawing.Drawing2D;//提供画高级二维，矢量图形功能
using System.Drawing.Imaging;//提供画GDI+图形的高级功能
using System.Collections;
using System.ComponentModel;
using System.Web;
using System.Web.UI;

namespace Lzq_The_Image
{
/// <summary>
/// The_Curve 的摘要说明。
/// </summary>
public class The_Curve : Page
{
protected The_Select_Color tsc=new The_Select_Color();
public The_Curve()
{
//
// TODO: 在此处添加构造函数逻辑
//
}

private float repleace(string number)
{

return Convert.ToSingle(Convert.ToSingle(number).ToString("F2"));
}

private float repleace(float number)
{
return Convert.ToSingle(number.ToString("F2"));
}

public void Make_Curve(string title,System.Data.DataSet tmds,string[] legendname,float devicemaxvalue,float Tittle_Image_Width,bool line,bool num)
{
//定义画布整体高度,曲线范围位置,宽度.
const float CHART_Height=390;
const float CHART_xnow=4;
//定义画布整体宽度,曲线范围高度.
float CHART_Width=0;
int Max_DataSet_Row_Count=0;
int First_Table=0;
//查找最大数据个数
for(int z=0;z<tmds.Tables.Count;z++)
{
if(tmds.Tables[z].Rows.Count>Max_DataSet_Row_Count)
{
Max_DataSet_Row_Count=tmds.Tables[z].Rows.Count;
First_Table=z;
}
}
this.Drawing_TittleAndCutline(Tittle_Image_Width,legendname,title);
//动态设置画布总体宽度.
if(Max_DataSet_Row_Count>20)
{
CHART_Width=Max_DataSet_Row_Count*40F;
CHART_Width+=140F;
}
else
{
CHART_Width=510;
}
//创建画布
Bitmap bm = new Bitmap(Convert.ToInt32(CHART_Width),Convert.ToInt32(CHART_Height+50F));
//创建绘图实例
Graphics g = Graphics.FromImage(bm);
//设置图象呈现质量和模
g.SmoothingMode = SmoothingMode.HighQuality;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
//填充背景
g.Clear(System.Drawing.Color.White);
//绘制曲线范围边框
g.DrawRectangle(new Pen(Brushes.Black,4F),71F,1F,CHART_Width-140F-1,CHART_Height-1);
//填充曲线范围背景
System.Drawing.Rectangle re=new Rectangle(71,1,Convert.ToInt32(CHART_Width-140-1),Convert.ToInt32(CHART_Height-1));
LinearGradientBrush lgb=new LinearGradientBrush(re,System.Drawing.Color.FromArgb(255,255,255),System.Drawing.Color.FromArgb(129,241,254),-90F,false);
g.FillRectangle(lgb,71F,1F,CHART_Width-140F-1,CHART_Height-1);
//定义数据总量
int TablesCount=tmds.Tables.Count;
//定义 横纵坐标值
float numberfory=0;
float numberforx=0;
this.Drawing_X_Value(50F,CHART_Height,devicemaxvalue,CHART_xnow,CHART_Height);
float value_x=0;
float[] dashValues = { 5, 5, 5, 5 };
Pen blackPen = new Pen(Color.Black,0.02F);
blackPen.DashPattern = dashValues;
if(line)
{
//绘制11个X轴坐标值(可调整)
for(int ynow=0;ynow<11;ynow++)
{
//计算X轴位置
value_x=repleace(devicemaxvalue/10F*ynow);
g.DrawLine(blackPen,71F,CHART_Height-(CHART_Height/10*ynow),CHART_Width-70F,CHART_Height-(CHART_Height/10*ynow));
}
}
//绘制横向坐标轴
for(int c=0;c<Max_DataSet_Row_Count;c++)
{
if(c%2!=0)
{
g.DrawString(tmds.Tables[First_Table].Rows[c][1].ToString(),new Font("Tahoma",7),Brushes.Black,new PointF(71F+repleace((CHART_Width-140F)/(tmds.Tables[First_Table].Rows.Count-1)*c)-25F,CHART_Height+10));
if(line)
{
g.DrawLine(blackPen,71F+repleace((CHART_Width-140F)/(tmds.Tables[First_Table].Rows.Count-1)*c),CHART_Height,71F+repleace((CHART_Width-140F)/(tmds.Tables[First_Table].Rows.Count-1)*c),1F);
}
}
else
{
g.DrawString(tmds.Tables[First_Table].Rows[c][1].ToString(),new Font("Tahoma",7),Brushes.Black,new PointF(71F+repleace((CHART_Width-140F)/(tmds.Tables[First_Table].Rows.Count-1)*c)-25F,CHART_Height+25));
if(line)
{
g.DrawLine(blackPen,71F+repleace((CHART_Width-140F)/(tmds.Tables[First_Table].Rows.Count-1)*c),CHART_Height,71F+repleace((CHART_Width-140F)/(tmds.Tables[First_Table].Rows.Count-1)*c),1F);
}

}
}
//循环绘制曲线
for(int a=0;a<TablesCount;a++)//---根据数据集生成多条曲线
{
if(tmds.Tables[a].Rows.Count>1)//---如果数据集中数据个数多余1个才执行绘制.(数据集个数必须>=2)
{
//定义曲线坐标总数值
int pointnum=tmds.Tables[a].Rows.Count;
//定义曲线坐标数组
PointF[] pt=new PointF[pointnum];
//循环生成当前数据集曲线所有坐标
for(int b=0;b<tmds.Tables[a].Rows.Count;b++)
{
numberforx=(CHART_Width-140F)/(tmds.Tables[a].Rows.Count-1);
numberfory=(repleace(tmds.Tables[a].Rows[b][0].ToString())/devicemaxvalue)*CHART_Height;
pt[b].X=71F+repleace(numberforx*b);
pt[b].Y=CHART_Height-(numberfory);
}
//根据坐标数组绘制曲线
g.DrawCurve(new Pen(tsc.GetChartItemColor(a),2.0F),pt,0.3F);
float num_x=0;
float num_y=0;
float num_width=0;
float num_height=0;
if(num)
{
for(int h=0;h<pt.Length;h++)
{
num_height=18F;
if(devicemaxvalue>10000)
{
num_width=Convert.ToString(Convert.ToSingle(Convert.ToSingle(tmds.Tables[a].Rows[h][0].ToString())/10000).ToString("F2").Replace(".00","")+"万").Length*8F+4F;
}
else
{
num_width=Convert.ToString(Convert.ToSingle(Convert.ToSingle(tmds.Tables[a].Rows[h][0].ToString())).ToString("F2").Replace(".00","")).Length*8F+4F;
}
num_x=pt[h].X-(num_width/2);
num_y=pt[h].Y-num_height-3F;
if(num_y<20F)
{
num_y=20F;
}
g.DrawRectangle(new Pen(System.Drawing.Color.Black),num_x,num_y,num_width,num_height);
g.FillRectangle(Brushes.LightGoldenrodYellow,num_x,num_y,num_width,num_height);
if(devicemaxvalue>10000)
{
g.DrawString(Convert.ToSingle(Convert.ToSingle(tmds.Tables[a].Rows[h][0].ToString())/10000).ToString("F2").Replace(".00","")+"万",new Font("Tahoma",10),Brushes.Black,num_x+2F,num_y+2F);
}
else
{
g.DrawString(Convert.ToSingle(Convert.ToSingle(tmds.Tables[a].Rows[h][0].ToString())).ToString("F2").Replace(".00",""),new Font("Tahoma",10),Brushes.Black,num_x+2F,num_y+2F);
}
}
}
}
else
{

}
}
//判断此项曲线图是否已经存在图象实例
if(File.Exists(Page.Server.MapPath("../TheCurve.gif")))
{
File.Delete(Page.Server.MapPath("../TheCurve.gif"));//如果存在将旧实例删除
}
//将绘图实例保存为GIF格式的图象文件
bm.Save(Page.Server.MapPath("../TheCurve.gif"),ImageFormat.Gif);
//释放绘图资源
bm.Dispose();
g.Dispose();
}

private void Drawing_X_Value(float width,float height,float devicemaxvalue,float CHART_xnow,float CHART_Height)
{
float TAC_Backgroud_Width=width;
float TAC_Backgroud_Height=height;
//创建画布
Bitmap bm = new Bitmap(Convert.ToInt32(TAC_Backgroud_Width),Convert.ToInt32(TAC_Backgroud_Height+10F));
//创建绘图实例
Graphics g = Graphics.FromImage(bm);
//设置图象呈现质量和模式
g.SmoothingMode = SmoothingMode.HighQuality;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
//填充背景
g.Clear(System.Drawing.Color.White);
//绘制纵向坐标轴
//定义运算用X轴变量
float value_x=0;
//绘制11个X轴坐标值(可调整)
for(int ynow=0;ynow<11;ynow++)
{
//计算X轴位置
if(devicemaxvalue>10000)
{
value_x=repleace(devicemaxvalue/10000/10F*ynow);
g.DrawString(value_x.ToString("F0")+"万",new Font("Tahoma",7),Brushes.Black,new PointF(width-(value_x.ToString("F0").Length*6F+10F)-1F,CHART_Height-(CHART_Height/10*ynow)));
}
else
{
value_x=repleace(devicemaxvalue/10F*ynow);
g.DrawString(value_x.ToString("F0")+"%",new Font("Tahoma",7),Brushes.Black,new PointF(width-(value_x.ToString("F0").Length*6F+10F)-1F,CHART_Height-(CHART_Height/10*ynow)));
}
//绘制X轴值

}
//判断此项曲线图是否已经存在图象实例
if(File.Exists(Page.Server.MapPath("../TheCurve_X_Value.gif")))
{
File.Delete(Page.Server.MapPath("../TheCurve_X_Value.gif"));//如果存在将旧实例删除
}
//将绘图实例保存为GIF格式的图象文件
bm.Save(Page.Server.MapPath("../TheCurve_X_Value.gif"),ImageFormat.Gif);
//释放绘图资源
bm.Dispose();
g.Dispose();
}

private void Drawing_TittleAndCutline(float width,string[] legendname,string title)
{
float TAC_Backgroud_Width=width;
float TAC_Backgroud_Height=50F;
//创建画布
Bitmap bm = new Bitmap(Convert.ToInt32(TAC_Backgroud_Width),Convert.ToInt32(TAC_Backgroud_Height));
//创建绘图实例
Graphics g = Graphics.FromImage(bm);
//设置图象呈现质量和模式
g.SmoothingMode = SmoothingMode.HighQuality;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
//填充背景
g.Clear(System.Drawing.Color.White);
//绘制主标题
g.DrawString(title,new Font("Tahoma",12),Brushes.Black,new PointF(40,10));
//绘制图例
//定义首个图例颜色框
Point boxOrigin = new Point(740,22);
//定义首个图例文本
Point textOrigin = new Point(710,9);
//根据图例个数进行绘制
for(int i=0;i<legendname.Length;i++)
{
if(legendname[i].ToString()!="")
{
//画框
g.DrawRectangle(Pens.Black,boxOrigin.X,boxOrigin.Y,20,10);
//填充刚画的框
g.FillRectangle(new SolidBrush(tsc.GetChartItemColor(i)),boxOrigin.X,boxOrigin.Y,20,10);
if(i%2!=0)
{
//画字
g.DrawString(legendname[i].ToString(),new Font("Tahoma",8),Brushes.Black,new Point(textOrigin.X,textOrigin.Y+26));
}
else
{
g.DrawString(legendname[i].ToString(),new Font("Tahoma",8),Brushes.Black,new Point(textOrigin.X,textOrigin.Y));
}
//初始坐标 横向移动
boxOrigin.X -= 60;
textOrigin.X -= 60;
}
}

//判断此项曲线图是否已经存在图象实例
if(File.Exists(Page.Server.MapPath("../TheCurve_Tittle.gif")))
{
File.Delete(Page.Server.MapPath("../TheCurve_Tittle.gif"));//如果存在将旧实例删除
}
//将绘图实例保存为GIF格式的图象文件
bm.Save(Page.Server.MapPath("../TheCurve_Tittle.gif"),ImageFormat.Gif);
//释放绘图资源
bm.Dispose();
g.Dispose();
}
}
}