类型：转载 责任编辑：asp.net 日期：2007/05/23
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用.NET做画图程序,大家给一个意见哈.
主要是画一个坐标系,N多点,编程将其连接起来,用来分析其参数.
网友回答：
好像是System.Drawing
using System;
using System.Drawing;
using System.Web.Services;
using System.Data;
namespace localhost
{
/// <summary>
/// myDraw 的摘要说明。
/// </summary>
public class myDraw
{
public string thefullname;
public string theharfname;
int blockwidth;
int blockwidth1;
int blockheight;
int maxValue;
int chart_left;
int chart_top;
public myDraw()
{
//
// TODO: 在此处添加构造函数逻辑
//
blockwidth=20;
blockwidth1=40;
blockheight=200;
chart_left=80;
chart_top=50;
}
public string CreateLineImage(DataTable dt){
int ww=dt.Rows.Count*blockwidth1+100;
if (ww<=200) ww=200;
Bitmap image=new Bitmap(ww,380);
Graphics g=Graphics.FromImage(image);
maxValue=0;
for (int i=0;i<dt.Rows.Count;i++)
{
string pp=dt.Rows[i][1].ToString();
int tt=System.Convert.ToInt32(pp);
if( maxValue<tt) maxValue=tt;
}
if (maxValue==0) maxValue=1;
g.Clear(Color.FromArgb(239,235,214) );
g.DrawString("销售排行",new Font("Courier New", 10),new SolidBrush(Color.DarkBlue),20,5);
//Graphics 类还有很多绘图方法可以绘制 直线、曲线、圆等等
Pen blackPen1=new Pen(Color.Cyan ,1);
g.DrawLine(blackPen1,chart_left-20,chart_top,chart_left+dt.Rows.Count*blockwidth1,chart_top);
g.DrawString(maxValue.ToString(),new Font("Courier New", 9),new SolidBrush(Color.DarkBlue),chart_left-80,chart_top);
Pen blackPen=new Pen(Color.Black ,1);
g.DrawLine(blackPen,chart_left-20,chart_top-10,chart_left-20,chart_top+blockheight);
g.DrawLine(blackPen,new Point(chart_left-17,chart_top-3),new Point(chart_left-20,chart_top-10));
g.DrawLine(blackPen,new Point(chart_left-23,chart_top-3),new Point(chart_left-20,chart_top-10));
g.DrawLine(blackPen,chart_left-20,chart_top+blockheight,chart_left+dt.Rows.Count*blockwidth1 ,chart_top+blockheight);
g.DrawLine(blackPen,new Point(chart_left+dt.Rows.Count*blockwidth1-4,chart_top+blockheight-4),new Point(chart_left+dt.Rows.Count*blockwidth1 ,chart_top+blockheight));
g.DrawLine(blackPen,new Point(chart_left+dt.Rows.Count*blockwidth1-4,chart_top+blockheight+4),new Point(chart_left+dt.Rows.Count*blockwidth1 ,chart_top+blockheight));
Point[] pt=new Point[dt.Rows.Count];
for (int i=0;i<dt.Rows.Count;i++)
{
int tt=System.Convert.ToInt32(dt.Rows[i][1].ToString());
double mm=(System.Convert.ToDouble(tt)/System.Convert.ToDouble(maxValue));
int ht=System.Convert.ToInt32(blockheight*mm);
pt[i].X=chart_left+blockwidth1*i-20;
pt[i].Y=chart_top+blockheight-ht;
string name=dt.Rows[i][0].ToString();
if (name.Length<4)
{
g.DrawString(name,new Font("Courier New", 9),new SolidBrush(Color.DarkBlue),chart_left+blockwidth1*i-30,chart_top+blockheight+10);
}
else{
g.DrawString(name,new Font("Courier New", 9),new SolidBrush(Color.DarkBlue),chart_left+blockwidth1*i-40,chart_top+blockheight+20);
}
}
Pen redPen=new Pen(Color.Red ,1);
g.DrawLines(redPen,pt);
image.Save(thefullname,System.Drawing.Imaging.ImageFormat.Gif);
return theharfname;
}
public string CreateImage(DataTable dt)
{
int ww=dt.Rows.Count*blockwidth1+100;
if (ww<=200) ww=200;
Bitmap image=new Bitmap(ww,380);
Graphics g=Graphics.FromImage(image);
maxValue=0;
for (int i=0;i<dt.Rows.Count;i++){
string pp=dt.Rows[i][1].ToString();
int tt=System.Convert.ToInt32(pp);
if( maxValue<tt) maxValue=tt;
}
if (maxValue==0) maxValue=1;
g.Clear(Color.FromArgb(239,235,214) );
g.DrawString("销售排行",new Font("Courier New", 10),new SolidBrush(Color.DarkBlue),20,5);
//Graphics 类还有很多绘图方法可以绘制 直线、曲线、圆等等
Pen blackPen1=new Pen(Color.Cyan ,1);
g.DrawLine(blackPen1,chart_left-20,chart_top,chart_left+dt.Rows.Count*blockwidth1,chart_top);
g.DrawString(maxValue.ToString(),new Font("Courier New", 9),new SolidBrush(Color.DarkBlue),chart_left-80,chart_top);
Pen blackPen=new Pen(Color.Black ,1);
g.DrawLine(blackPen,chart_left-20,chart_top-10,chart_left-20,chart_top+blockheight);
g.DrawLine(blackPen,new Point(chart_left-17,chart_top-3),new Point(chart_left-20,chart_top-10));
g.DrawLine(blackPen,new Point(chart_left-23,chart_top-3),new Point(chart_left-20,chart_top-10));
g.DrawLine(blackPen,chart_left-20,chart_top+blockheight,chart_left+dt.Rows.Count*blockwidth1 ,chart_top+blockheight);
g.DrawLine(blackPen,new Point(chart_left+dt.Rows.Count*blockwidth1-4,chart_top+blockheight-4),new Point(chart_left+dt.Rows.Count*blockwidth1 ,chart_top+blockheight));
g.DrawLine(blackPen,new Point(chart_left+dt.Rows.Count*blockwidth1-4,chart_top+blockheight+4),new Point(chart_left+dt.Rows.Count*blockwidth1 ,chart_top+blockheight));
for (int i=0;i<dt.Rows.Count;i++)
{
int tt=System.Convert.ToInt32(dt.Rows[i][1].ToString());
double mm=(System.Convert.ToDouble(tt)/System.Convert.ToDouble(maxValue));
int ht=System.Convert.ToInt32(blockheight*mm);
g.DrawRectangle (blackPen,chart_left+blockwidth1*i,chart_top+blockheight-ht,blockwidth,ht);
g.FillRectangle(Brushes.Red,new Rectangle(chart_left+blockwidth1*i,chart_top+blockheight-ht,blockwidth,ht));
string name=dt.Rows[i][0].ToString();
for(int j=0;j<name.Length;j++)
{
g.DrawString(name.Substring(j,1),new Font("Courier New", 9),new SolidBrush(Color.DarkBlue),chart_left+blockwidth1*i,chart_top+blockheight+10+14*j);
}
}
image.Save(thefullname,System.Drawing.Imaging.ImageFormat.Gif);
return theharfname;
}
}
}
用水晶报表画图 或者用office带的控件