可生成准考证字样的图片 最终效果为：

public void CreateImage()
{
var ImaeUrl = @"E:\Test";
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));
string dizhi = "";
int j = 320; //初始坐标
for (int z = 0; z < 61; z += 23) //循环次数
{
int k = z + 20; // 第一次为0时
if (k > dizhi.Length) //k是否大于总字数
{
k = dizhi.Length - k; // 若大于比如k=45 dizhi.length=40 k=40-45 k=-5
int i = k + 20; //i = -5+20 这样就不至于截取超出范围
g.DrawString(dizhi.Substring(z, i), fn, Brushes.Black, new PointF(14, j += 18));
break;
}
g.DrawString(dizhi.Substring(z, 23), fn, Brushes.Black, new PointF(14, j += 18));
}

//产生杂点
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()));
}

//产生随机曲线
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);
}

//画直线
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);

//画方框
g.DrawRectangle(new Pen(Color.Black), 10, 10, 331, 382);

//填充图像
//string path=Server.MapPath("UpLoad"))+"\\4\\Original\\aaa.jpg";
string path = ImaeUrl + "\\BingChuan_5_6.jpg";
System.Drawing.Image newimage = System.Drawing.Image.FromFile(path);

//图像定位
g.DrawImage(newimage, 245, 77, 95, 117);

//释放图像缓存
g.Dispose();

//定义产生图片格式
//Response.ContentType = "image/Jpeg";
//bt.Save(Response.OutputStream, ImageFormat.Jpeg);

//图片自动保存路径
string dirpath = ImaeUrl;
if (!Directory.Exists(dirpath))
{
Directory.CreateDirectory(dirpath);
}

//bt.Save(Server.MapPath(dirpath + Session.SessionID + ".jpg"), ImageFormat.Jpeg);
//string lujing = @"E:\Exam\client\Admin_exam\zkz_image\" + Request.QueryString["id"].ToString() + "-" + DateTime.Now.ToString("yyyy-mm-dd") + ".jpg";
string lujing = ImaeUrl +"\\"+ Guid.NewGuid().ToString() + "-" + DateTime.Now.ToString("yyyy-mm-dd") + ".jpg";
bt.Save(lujing, ImageFormat.Jpeg);

//释放位图缓存
bt.Dispose();
}

动态生成图片（无底图，可描点）