using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Web.SessionState;
using System.Drawing.Imaging;
using System.Data.OleDb;
public partial class TGtuCon : System.Web.UI.Page
{
public void Page_Load(object sender, EventArgs e)
{
System.Drawing.Bitmap image = new System.Drawing.Bitmap(1024,800);
Graphics g = Graphics.FromImage(image);
try
{
// 公司1 01/01~02/28
// 公司2 02/01~03/21
// 公司3 01/13~02/02 02/12~03/04
int hang = 20; // 行距
int shu = 100;
// 最大日期,最小日期
string maxdate = "2009-03-04", mindate = "2009-01-01";
//清空图片背景色
g.Clear(Color.Snow);
//在绘画图面的指定位置，以指定的字体、指定的颜色绘制指定的字符串。
g.DrawString("××公司甘特图", new Font("黑体", 14), Brushes.Black, new Point(5, 5));
//定点
Point myRec = new Point(10, 70); Point myDec = new Point(10 + shu, 40);
// 竖列字
g.DrawString("公司1", new Font("黑体", 10), Brushes.Black, myRec.X, myRec.Y);
g.DrawString("公司2", new Font("黑体", 10), Brushes.Black, myRec.X, myRec.Y + hang);
g.DrawString("公司3", new Font("黑体", 10), Brushes.Black, myRec.X, myRec.Y + hang * 2);
// 横列标题
int x = 0, nextX = myDec.X; string nextdate = mindate;
for(int i=1;i<5;i++)
{
g.DrawString(i.ToString() + "月", new Font("黑体", 10), Brushes.Black, nextX + x, myDec.Y);
nextX = nextX + x;
TimeSpan ts = new TimeSpan(); ts = Convert.ToDateTime(nextdate).AddMonths(1) - Convert.ToDateTime(nextdate);
x = Convert.ToInt32 (ts.Days) * 10;
nextdate = Convert.ToDateTime(nextdate).AddMonths(1).ToString() ;
}
// 公司1 01/01~02/28
int width=0,startx=0;TimeSpan tspan = new TimeSpan();
tspan = Convert.ToDateTime("2009-02-28") - Convert.ToDateTime(mindate);
width = Convert.ToInt32 (tspan.Days) * 10;
g.DrawRectangle(Pens.Black, myDec.X+startx , myRec.Y, width, 10);//绘制Bar图
g.FillRectangle(new SolidBrush(GetColor(0)), myDec.X+startx , myRec.Y, width, 10);//以指定的色彩填充Bar图
g.DrawString("01/01~02/28", new Font("黑体", 10), Brushes.Black, myDec.X + startx, myRec.Y);
// 公司2 02/01~03/21
tspan = Convert.ToDateTime("2009-02-01") - Convert.ToDateTime(mindate);
startx = Convert.ToInt32(tspan.Days) * 10;
tspan = Convert.ToDateTime("2009-03-21") - Convert.ToDateTime(mindate);
width = Convert.ToInt32(tspan.Days) * 10 - startx;
g.DrawRectangle(Pens.Black, myDec.X + startx, myRec.Y + hang, width, 10);//绘制Bar图
g.FillRectangle(new SolidBrush(GetColor(1)), myDec.X + startx, myRec.Y + hang, width, 10);//以指定的色彩填充Bar图
g.DrawString("02/01~03/21", new Font("黑体", 10), Brushes.Black, myDec.X + startx, myRec.Y + hang);
// 公司3 01/13~02/02 02/12~03/04
tspan = Convert.ToDateTime("2009-01-13") - Convert.ToDateTime(mindate);
startx = Convert.ToInt32(tspan.Days) * 10;
tspan = Convert.ToDateTime("2009-02-02") - Convert.ToDateTime(mindate);
width = Convert.ToInt32(tspan.Days) * 10 - startx;
g.DrawRectangle(Pens.Black, myDec.X + startx, myRec.Y + hang*2, width, 10);//绘制Bar图
g.FillRectangle(new SolidBrush(GetColor(2)), myDec.X + startx, myRec.Y + hang * 2, width, 10);//以指定的色彩填充Bar图
g.DrawString("01/13~02/02", new Font("黑体", 10), Brushes.Black, myDec.X + startx, myRec.Y + hang * 2);
tspan = Convert.ToDateTime("2009-02-12") - Convert.ToDateTime(mindate);
startx = Convert.ToInt32(tspan.Days) * 10;
tspan = Convert.ToDateTime("2009-03-04") - Convert.ToDateTime(mindate);
width = Convert.ToInt32(tspan.Days) * 10 - startx;
g.DrawRectangle(Pens.Black, myDec.X + startx, myRec.Y + hang * 2, width, 10);//绘制Bar图
g.FillRectangle(new SolidBrush(GetColor(2)), myDec.X + startx, myRec.Y + hang * 2, width, 10);//以指定的色彩填充Bar图
g.DrawString("02/12~03/04", new Font("黑体", 10), Brushes.Black, myDec.X + startx, myRec.Y + hang * 2);
//画图片的边框线
g.DrawRectangle(new Pen(Color.Red), 0, 0, image.Width - 1, image.Height - 1);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
Response.ClearContent();
Response.ContentType = "image/Gif";
Response.BinaryWrite(ms.ToArray());
}
finally
{
g.Dispose();
image.Dispose();
}
}
/// <summary>
/// 获取颜色
/// </summary>
/// <param name="itemIndex">数组的索引</param>
/// <returns></returns>
private Color GetColor(int itemIndex)
{
Color myColor;
int i = itemIndex;
switch (i)
{
case 0:
myColor = Color.LightGreen ;
return myColor;
case 1:
myColor = Color.Pink ;
return myColor;
case 2:
myColor = Color.LightYellow;
return myColor;
case 3:
myColor = Color.LightBlue;
return myColor;
case 4:
myColor = Color.Orange;
return myColor;
case 5:
myColor = Color.Aqua;
return myColor;
case 6:
myColor = Color.SkyBlue;
return myColor;
case 7:
myColor = Color.DeepPink;
return myColor;
case 8:
myColor = Color.Azure;
return myColor;
case 9:
myColor = Color.Brown;
return myColor;
case 10:
myColor = Color.Pink;
return myColor;
case 11:
myColor = Color.BurlyWood;
return myColor;
case 12:
myColor = Color.Chartreuse;
return myColor;
default:
myColor = Color.Pink;
return myColor;
}
}
}
