【ttyp】ASP.NET圖形化的曲線圖類

iDotNetSpace發表於2008-07-23
chart.cs

using System;
using System.Drawing;

namespace Report
{
    
/// 
    
/// Chart 的摘要說明。
    
/// ==================================================================================================
    
/// 
    
///    ClassName  :Report.Chart  
    
///    Intro      :
    
///    Example    :  
    
///    Ver        :0.2
    
///     
    
///    Author     :ttyp  
    
///    Email      :ttyp@21cn.com  
    
///    Date       :2007-7-30
    
/// ==================================================================================================
    
/// 
    public class Chart
    {
        
public Chart(){}

        
private string    _data    = "";
        
private int        _width    = 100;
        
private int        _height    = 100;
        
private int        _padding= 8;
        
private Color    _grid_color        = Color.FromArgb(0x93,0xbe,0xe2);
        
private Color    _border_color    = Color.FromArgb(0x93,0xbe,0xe2);
        
private Font    _font            = new Font("Arial",8);

        
public Font Font
        {
            
get { return _font;}
            
set { _font = value;}
        }

        
public Color BorderColor
        {
            
get { return _border_color;}
            
set { _border_color = value;}
        }

        
public Color GridColor
        {
            
get { return _grid_color;}
            
set { _grid_color = value;}
        }

        
public int Padding
        {
            
get { return _padding;}
            
set { _padding = Math.Max(0,value);}
        }

        
public int Width
        {
            
get { return _width;}
            
set { _width = Math.Max(0,value);}
        }

        
public int Height
        {
            
get { return _height;}
            
set { _height = Math.Max(0,value);}
        }

        
public string Data
        {
            
get { return _data;}
            
set { _data = value;}
        }

        
public void Render()
        {
            
int width        = this.Width;
            
int height        = this.Height;
            
int padding        = this.Padding;    
    
            
            System.Drawing.Bitmap image 
= new System.Drawing.Bitmap(width,height);    
            
            Graphics g 
= Graphics.FromImage(image);

            
//清空圖片背景色
            g.Clear(Color.White);

            
//虛線畫筆
            Pen dot                = new Pen(this.GridColor);
            dot.DashStyle    
= System.Drawing.Drawing2D.DashStyle.Dot;

            
//實線畫筆
            Pen solid            = new Pen(this.BorderColor);

            
//文字字型
            Font font            = this.Font;        
            
try
            {                

                
//冗餘,去除最後的資料分割標記,防止空資料
                if(this.Data.EndsWith(";"))
                {
                    
this.Data = this.Data.Substring(0,this.Data.Length-1);
                }

                
string[] info = this.Data.Split(';');        //資料資訊

                
if(info.Length>=2)
                {
                

                    
string[] lines = info[0].Split(',');    //圖例
                    string[] units = info[1].Split(',');    //單位和標題格式,a,b,c,d  a 縱座標單位 b 縱座標格式 N 數字 D 時間 後面是具體格式,c 橫座標單位 d 橫座標格式(同b)

                    
//曲線顏色表
                    Color[] color    = new Color[]{Color.Blue,Color.Green,Color.Red,Color.Gray,Color.Black,Color.Magenta,Color.Cyan,Color.Yellow,Color.DeepPink,Color.BurlyWood,Color.DarkRed,Color.Gold};


                    
//圖例文字的大小
                    SizeF sFont            = GetMaxSize(lines,g,font);

                    
//獲得刻度文字高度
                    int textHeight        = (int)(sFont.Height*3/2);

                    
//曲線點的個數
                    int points            = info.Length-2;

                    
//得到曲線點陣列集合
                    string[,] curve = new string[info.Length-2,lines.Length+1];
                    
for(int i=0;i<points;i++)
                    {
                        
string[] l = info[i+2].Split(',');
                        
int len = l.Length;
                                                
                        
for(int j=0;j<=lines.Length;j++)
                        {
                            
if(j<len)
                            {                        
                                curve[i,j] 
= l[j];
                            }
                            
else
                            {
                                curve[i,j] 
= "N";            //非資料,不畫線
                            }
                        }                
                    }        
        
                    
//獲得最大,最小值
                    double maxY,minY,maxX,minX;

                    GetMaxMin(curve,
out maxY,out minY,out maxX,out minX);
                    
//冗餘最大最小值
                    if(maxY==minY)
                    {
                        
if(maxY==0)
                        {
                            maxY 
= 10;
                            minY 
= -10;
                        }
                        
else
                        {
                            
if(maxY>0)
                            {
                                maxY 
= maxY*2;
                                minY 
= 0;
                            }
                            
else
                            {
                                maxY 
= 0;
                                minY 
= maxY*2;
                            }
                        }
                    }

                    
if(maxX==minX)
                    {
                        
if(maxX==0)
                        {
                            maxX 
= 10;
                            minX 
= -10;
                        }
                        
else
                        {
                            
if(maxX>0)
                            {
                                maxX 
= maxX*2;
                                minY 
= 0;
                            }
                            
else
                            {
                                maxX 
= 0;
                                minX 
= maxX*2;
                            }
                        }
                    }

                    
//獲取座標框的上下左右
                    float left        = (padding*2+sFont.Height+2 + sFont.Width + padding+GetMaxSize(units[1],g,font).Width+padding);
                    
float bottom    = height-padding-textHeight;
                    
float top        = padding;
                    
float right        = width -padding;

                    
//獲取曲線框的寬度和高度(比座標框略小)
                    float yWidth = bottom-top-GetMaxSize(units[0],g,font).Height*3/2-padding;
                    
float xWidth = right-left-GetMaxSize(units[3],g,font).Width/2 - sFont.Width -padding;


                    
//---------------------------------------------------------------------------------

                    
//獲取最大行
                    int maxrow    = (int)(yWidth/(sFont.Height/2*3));
                    maxrow    
= Math.Max(maxrow,1);

                    
//獲取Y步進值
                    float stepYv = (float)((maxY-minY)/(maxrow));

                    
if(units[1].Length>1)
                    {
                        
//整數分割,調整最大行和最大最小值
                        if(units[1].Substring(0,1).ToLower()=="d")
                        {
                            maxY    
= Math.Ceiling(maxY);
                            minY    
= Math.Floor(minY);
                            stepYv    
= (float)Math.Ceiling((maxY-minY)/maxrow);
                            maxrow    
= (int)((maxY-minY)/stepYv);                            
                        }    
                    }

                    
float stepy        = (float)((yWidth/(maxY-minY))*stepYv);

                
                    
//---------------------------------------------------------------------------------


                    
//得到最大的網格列(最多10列)
                    int maxcol    = points;
                    maxcol        
= Math.Min(points,maxcol);
                    maxcol        
= Math.Max(maxcol,1);

                    
//獲取X步進值
                    float stepXv = (float)((maxX-minX)/(maxcol));

                    
if(units[3].Length>1)
                    {
                        
//整數分割,調整最大和最小值,以及步進
                        if(units[3].Substring(0,1).ToLower()=="d")
                        {
                            maxX    
= Math.Ceiling(maxX);
                            minX    
= Math.Floor(minX);
                            stepXv    
= (float)Math.Ceiling((maxX-minX)/maxcol);
                            maxcol    
= (int)((maxX-minX)/stepXv);
                        }                
                    }

                    
//獲得最大顯示列數
                    int dispcol = (int)((xWidth)/(GetMaxSize(units[3].Substring(1),g,font).Width+padding));
                    dispcol 
= Math.Max(dispcol,1);

                    
//如果最大顯示列小於最大列,則應該縮減
                    if(dispcol<maxcol)
                    {
                        stepXv    
= (float)Math.Ceiling((maxX-minX)/dispcol);
                        maxcol    
= (int)((maxX-minX)/stepXv);
                    }


                    
float stepx = (float)((xWidth/(maxX-minX))*stepXv);


                    
//獲得最大的曲線數目
                    int maxline    = color.Length;   &nbs

來自 “ ITPUB部落格 ” ,連結:http://blog.itpub.net/12639172/viewspace-407087/,如需轉載,請註明出處,否則將追究法律責任。

【ttyp】ASP.NET圖形化的曲線圖類
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