动态生成image问题（紧急） - 编程论坛

#2

雪雨星风2008-08-04 17:46

高手们帮忙解决一下了小弟感激不尽

#3

雪雨星风2008-08-04 17:46

生成图片是为了方便打印和保存还防止了随便改动

#4

蓝色畅想2008-08-04 22:33

基本信息我可以的但是把照片放进去我没搞成功下面是放你的基本信息供参考!

protected void Page_Load(object sender, EventArgs e)
    {
        gethua();
    }
    protected void gethua()
    {
        Random random = new Random();

        Bitmap bt = new Bitmap(600,400,PixelFormat.Format24bppRgb);
        Graphics g = Graphics.FromImage(bt);
        Font fn = new Font("Tahoma",12,FontStyle.Bold);

        g.Clear(Color.RoyalBlue);
        g.DrawString("姓名:张三",fn,Brushes.White,new PointF(10,10));
        g.DrawString("年龄:33", fn, Brushes.White, new PointF(10, 30));
        g.DrawString("身份证:123456789", fn, Brushes.White, new PointF(10, 50));

        for (int i = 0; i < 25; i++)
        {
            int x1 = random.Next(bt.Width);
            int x2 = random.Next(bt.Width);
            int y1 = random.Next(bt.Height);
            int y2 = random.Next(bt.Height);

            g.DrawLine(new Pen(Color.GreenYellow), x1, y1, x2, y2);
        }


        Response.ContentType = "image/Jpeg";
        bt.Save(Response.OutputStream,ImageFormat.Jpeg);

    }

#5

雪雨星风2008-08-05 08:12

图片我也很是头疼
g.DrawString("姓名:张三",fn,Brushes.White,new PointF(10,10));

它主要是不解读标签

但还是要谢谢你

#6

雪雨星风2008-08-05 09:16

没高手吗

#7

cyyu_ryh2008-08-05 11:23

用上传控件上传图片
把图片放到服务器的文件夹里面
数据库里存储图片服务器路径
上传时控制图片的大小就可以了

#8

雪雨星风2008-08-05 12:04

我要的效果是把表格连同内容生成为一张图片

#9

bygg2008-08-05 12:36

照片也是一张图片,
用 g.DrawImage()方法就可以了.

#10

雪雨星风2008-08-05 13:11

System.Drawing.Image newimage = System.Drawing.Image.FromFile("~image/123.jpg");
g.DrawImage(newimage, 100, 100, 40, 70);

我这样写怎么不行啊老是报错

#11

雪雨星风2008-08-05 13:11

~image/123.jpg
说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: ~image/123.jpg

源错误:

行 46:         g.DrawLine(new Pen(Color.GreenYellow), 20, 90, 380, 90);
行 47:         g.DrawRectangle(new Pen(Color.CornflowerBlue), 20, 20, 360, 560);
行 48:         System.Drawing.Image newimage = System.Drawing.Image.FromFile("~image/123.jpg");
行 49:         g.DrawImage(newimage, 100, 100, 40, 70);
行 50:         Response.ContentType = "image/Jpeg";

源文件: e:\练习\baoming\Default.aspx.cs    行: 48

#12

bygg2008-08-05 16:53

System.Drawing.Image image = System.Drawing.Image.FromFile(imagePath);
Bitmap bitmap = new Bitmap(image.Width, image.Height, PixelFormat.Format32bppArgb);
Graphics graphics = Graphics.FromImage(bitmap);
//在指定位置并且按指定大小绘制原图片对象
graphics.DrawImage(image, new Rectangle(0, 0, image.Width, image.Height));
.......
.......

注意:用Image时,一定要记得在用完以后关闭它,要不然你的内存会被一点一点吃掉.还有Bitmap也一样

#13

bygg2008-08-05 16:53

System.Drawing.Image newimage = System.Drawing.Image.FromFile(Server.MapPath("~image/123.jpg"));

#14

cyyu_ryh2008-08-05 17:16

我靠
题目看錯了
原来是向图片写字

#15

雪雨星风2008-08-06 09:51

谢谢各位了

#16

雪雨星风2008-08-06 13:09

[bo][un]bygg[/un] 在 2008-8-5 16:53 的发言：[/bo]

System.Drawing.Image image = System.Drawing.Image.FromFile(imagePath);
Bitmap bitmap = new Bitmap(image.Width, image.Height, PixelFormat.Format32bppArgb);
Graphics graphics = Graphics.FromImage(bitm ...

sing 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.Drawing;
using System.Drawing.Imaging;
using
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            gethua();
        }
    }
    protected void gethua()
    {
        Random random = new Random();
        Bitmap bt = new Bitmap(351, 402, PixelFormat.Format24bppRgb);
        Graphics g = Graphics.FromImage(bt);
        Font fn1 = new Font("Tahoma", 10, FontStyle.Bold);
        Font fn = new Font("Tahoma", 9, FontStyle.Bold);
        g.Clear(Color.Honeydew);
        g.DrawString("中国电子学会电子设计初级工程师认证考试名", fn1, Brushes.Black, new PointF(20, 20));
        g.DrawString("准考证", fn1, Brushes.Black, new PointF(140, 50));
        g.DrawString("准考证号", fn, Brushes.Black, new PointF(14, 85));
        g.DrawString("CIE09101080004", fn, Brushes.Black, new PointF(90, 85));
        g.DrawString("考生姓名", fn, Brushes.Black, new PointF(14, 115));
        g.DrawString("李晓杰", fn, Brushes.Black, new PointF(90, 115));
        g.DrawString("考生性别", fn, Brushes.Black, new PointF(14, 145));
        g.DrawString("男", fn, Brushes.Black, new PointF(90, 145));
        g.DrawString("身份证号", fn, Brushes.Black, new PointF(14, 175));
        g.DrawString("410381198408272032", fn, Brushes.Black, new PointF(90, 175));
        g.DrawString("考试时间", fn, Brushes.Black, new PointF(14, 205));
        g.DrawString("2007年11月30号", fn, Brushes.Black, new PointF(90, 205));
        g.DrawString("考试科目", fn, Brushes.Black, new PointF(14, 235));
        g.DrawString("电子设计", fn, Brushes.Black, new PointF(90, 235));
        g.DrawString("考点名称", fn, Brushes.Black, new PointF(14, 265));
        g.DrawString("电子设计工程师证书", fn, Brushes.Black, new PointF(90, 265));
        g.DrawString("考场编号", fn, Brushes.Black, new PointF(14, 295));
        g.DrawString("9101080004", fn, Brushes.Black, new PointF(90, 295));
        g.DrawString("机位编号", fn, Brushes.Black, new PointF(196, 295));
        g.DrawString("080004", fn, Brushes.Black, new PointF(275, 295));
        g.DrawString("交通指南(由各考点提供)", fn, Brushes.Black, new PointF(14, 325));
        g.DrawString("在北京站可直接换乘环线地铁，在东四十条下车。", fn, Brushes.Black, new PointF(30, 340));
        for (int i = 0; i < 500; i++)
        {
            int x1 = random.Next(bt.Width-20);
            int y1 = random.Next(bt.Height-20);
            bt.SetPixel(x1, y1, Color.FromArgb(random.Next()));
        }
        for (int i = 0; i < 50; i++)
        {
            int x1 = random.Next(bt.Width-20);
            int y1 = random.Next(bt.Height-20);
            int x2 = random.Next(1,30);
            int y2 = random.Next(1,20);
            int x3 = random.Next(15,45);
            int y3 = random.Next(70,270);
            g.DrawArc(new Pen(Color.FromArgb(random.Next())), x1, y1, x2, y2, x3, y3);
        }
        g.DrawLine(new Pen(Color.Black), 10, 75, 341, 75);
        g.DrawLine(new Pen(Color.Black), 10, 105, 243, 105);
        g.DrawLine(new Pen(Color.Black), 10, 135, 243, 135);
        g.DrawLine(new Pen(Color.Black), 10, 165, 243, 165);
        g.DrawLine(new Pen(Color.Black), 10, 195, 341, 195);
        g.DrawLine(new Pen(Color.Black), 10, 225, 341, 225);
        g.DrawLine(new Pen(Color.Black), 10, 255, 341, 255);
        g.DrawLine(new Pen(Color.Black), 10, 285, 341, 285);
        g.DrawLine(new Pen(Color.Black), 10, 315, 341, 315);
        g.DrawLine(new Pen(Color.Black), 80, 75, 80, 314);
        g.DrawLine(new Pen(Color.Black), 185, 285, 185, 314);
        g.DrawLine(new Pen(Color.Black), 265, 285, 265, 314);
        g.DrawLine(new Pen(Color.Black), 243, 75, 243, 195);
        g.DrawRectangle(new Pen(Color.CornflowerBlue), 10, 10, 331, 382);
        System.Drawing.Image newimage = System.Drawing.Image.FromFile("E:/练习/baoming/image/123.jpg");
        g.DrawImage(newimage, 245, 77, 95, 117);
        Response.ContentType = "image/Jpeg";
        bt.Save(Response.OutputStream, ImageFormat.Jpeg);
    }
}
当我打开vs第一次运行时 F5  生成一张图片   但是   我不关闭VS修改其中的信息   再次F5  再次生成一张图片
但是我右键另存这张图片   预览这张另存的图片时会发现另存的是打开vs第一次运行时 F5  生成的图片
这是为什么    是因为image没关闭的原因吗    image如何关闭