using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace xcrm.Module.report
{
 /// <summary>
 /// draw 的摘要说明。
 /// </summary>
 public class draw : System.Web.UI.Page
 {
  private void Page_Load(object sender, System.EventArgs e)
  {
   // 在此处放置用户代码以初始化页面
   Draw_Imgbar();
  }
  //画棒图
  void Draw_Imgbar(){
   //创建一个长度为400，宽带为400的Bitmap实例
   Bitmap bmp = new Bitmap(400,300);
   Graphics g;
   g = Graphics.FromImage(bmp);
   g.Clear(Color.Snow);
   string[] sitem = {"很好","好","一般","差"};
   int[] num = {1000,69,90,2000};
   int cnt,i,len,iBarWidth;
   float scale;
   float[] nflt;
   string header;
   header = "";
   cnt =0;
      iBarWidth = 40;
   scale = 1;
   len = num.Length;
   //nflt.Length = len;
   nflt = new float[len];
   for(i=0;i<len;i++)
   {
    cnt += num[i];
   }
   //flt = cnt /len;
   for(i=0;i<len;i++)
   {
   nflt[i] = 200 * num[i]/cnt;
    //nflt[i] = scale * num[i]/cnt;
   }
           

   header = "调查统计结果一览图";
   g.DrawString ( header , new Font( "宋体", 12,FontStyle.Bold) , Brushes.Black , new Point( 75 , 10 ) ) ;
   Point myRec = new Point ( 300 , 40 ) ;
   Point myDec = new Point ( 320 , 40 ) ;

         
   for(i=0;i<len;i++)
   {
    g.DrawRectangle ( Pens.Black , myRec.X , myRec.Y , 20 , 10 ) ;
    //绘制小方块
    g.FillRectangle ( new SolidBrush( Return_Color( i ) ) , myRec.X , myRec.Y , 20 , 10 ) ;
    //填充小方块
    g.DrawString ( " " + sitem[i], new Font( "宋体" , 9 ) , Brushes.Black , myDec ) ;
    //绘制小方块右边的文字
    myRec.Y += 15 ;
    myDec.Y += 15 ;

    g . DrawRectangle ( Pens.Black , ( i * iBarWidth ) + 15 , 290 - (nflt[ i ] * scale ) , 20 , ( nflt[ i ] * scale ) + 5 ) ;
    //绘制Bar图
    g . FillRectangle ( new SolidBrush ( Return_Color( i ) ) , ( i * iBarWidth ) + 15 , 290 - ( nflt[ i ] * scale ) , 20 , ( nflt[ i ] * scale ) + 5 ) ;
    //以指定的色彩填充Bar图
    g . DrawString ( num[ i ].ToString ( ) , new Font( "宋体" , 9 ) , Brushes.Black , ( i * iBarWidth ) + 20 , 275 - (nflt[ i ] * scale ) ) ;
    //显示Bar图代表的数据

    //s = s + nflt[i];   
   }
   Pen p = new Pen ( Color.Black , 1 ) ;
   g . DrawRectangle ( p , 1 , 1 , 398 , 298 ) ;
   bmp.Save ( Response.OutputStream , System.Drawing.Imaging.ImageFormat.Jpeg);
   bmp.Dispose();
  }