using System;
using System.Data;
using System.Configuration;
using System.Collections;
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.Drawing;
using System.Drawing.Imaging;
public partial class Default5 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
this.Pic();
}
private void Pic()
{
//測試數據
DataTable table = new DataTable("Data");
DataRow Dr;
DataColumn Dc = new DataColumn("ID",Type.GetType("System.Int32"));
DataColumn Dc2 = new DataColumn("Num",Type.GetType("System.Int32"));
DataColumn Dc3 = new DataColumn("name", Type.GetType("System.String"));
table.Columns.Add(Dc);
table.Columns.Add(Dc2);
table.Columns.Add(Dc3);
Random rnd=new Random();
for (int n = 0; n < 61; n++)
{
Dr = table.NewRow();
Dr[0] = n;
Dr[1] = rnd.Next(10, 140);
Dr[2] = n.ToString();
table.Rows.Add(Dr);
}
//畫圖參數
int BG_Width = 450;
int BG_Height = 180;
int Pic_Width = 450;
int Pic_Height = 180;
int pic_X = 6;
int pic_H = 1;
int pic_tr=5;
int pic_td = 12;
Rectangle rec = new Rectangle(50, 15, 360, 150);
Pen Pic_Bolder = new Pen(Color.Black, 1);
Pen Pic_line = new Pen(Color.Gray, 1);
Pen Pic_Data = new Pen(Color.Red,2);
SolidBrush brusth = new SolidBrush(Color.Blue);
Point[] DataPt = new Point[table.Rows.Count];
int x;
int y;
for (int n = 0; n < table.Rows.Count; n++)
{
Dr=table.Rows[n];
x=(int)Dr[0] * pic_X + rec.X;
y=(int)Dr[1] * pic_H + rec.Y;
DataPt[n] = new Point(x,y);
}
Bitmap Bg = new Bitmap(BG_Width, BG_Height, PixelFormat.Format24bppRgb);
Graphics Ph = Graphics.FromImage(Bg);
Ph.Clear(Color.White);
Ph.DrawRectangle(Pic_Bolder, rec);
//畫折線
Ph.DrawCurve(Pic_Data, DataPt);
//rec.
Point SPoint=new Point();
Point Epoint=new Point();
//畫橫線
for (int n = 1; n < pic_tr; n++)
{
//cell[0] = new Point(rec.X);
SPoint.X = 0 + rec.X;
SPoint.Y = n * 30 + rec.Y;
Epoint.X = rec.Width + rec.X;
Epoint.Y = n * 30 + rec.Y;
Ph.DrawLine(Pic_line,SPoint,Epoint);
}
//畫豎線
for (int n = 1; n < pic_td; n++)
{
SPoint.X = n * 30 +rec.X;
SPoint.Y = rec.Y;
Epoint.X = n * 30 + rec.X;
Epoint.Y = rec.Height+ rec.Y;
Ph.DrawLine(Pic_line, SPoint, Epoint);
}
//畫標題
string Title = "畫折線測試";
SolidBrush brush=new SolidBrush(Color.RoyalBlue);
Ph.DrawString(Title, new Font("Franklin Gothic Demi", 12, FontStyle.Italic), brush, new Point(200, 0));
Ph.Save();
Bg.Save(Response.OutputStream, ImageFormat.Gif);
}
}
