我得到了一台安装了 Windows Server 2008R2 64bit (x86) 的开发 PC，因此它被用作工作站。我的开发环境是针对 .NET3.5 的 VS2008（是的，2008！！！）
在我们的网站（现在已经有几年了）有一个内部开发的验证码。
长话短说，这些字母不会在我的开发机器 2008R2-64 上输出，而是在所有其他窗口（我们的测试和实时服务器是 2003 64 位）和 Virtual PC（2008 32 位而不是 R2、XP、Win7）上输出。
我在网上看到一些帖子说像素的测量方式可能已经改变（很难确定），但没有太大变化。
这是一个小的网络应用程序来说明这个问题。
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Captcha1
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Random _randomNumberGenerator = new Random();
/* Output random string */
float _xPosition = 20;
float _xPositionMax = 0;
float _yPosition = 0;
float _yPositionMax = 0;
string strRandom = string.Empty;
/* Prepare drawing functions to output */
System.Drawing.Bitmap objBmp = new System.Drawing.Bitmap(500, 200);
System.Drawing.Graphics objGraphics = System.Drawing.Graphics.FromImage(objBmp);
objGraphics.Clear(System.Drawing.Color.AliceBlue);
objGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
string[] strFont = new string[] { "Arial" };
string[] strArray = new string[] { "a", "b", "c", "d", "e" };
strRandom = "AAAAAA";//these are the characters for the captcha. In normal circumstances it would be random!
/* Render the image */
int _rotate = -1;
objGraphics.RotateTransform(3);
foreach (char _char in strRandom.ToCharArray())
{
/* Rotate the image */
objGraphics.RotateTransform((float)(_rotate * 5));
_rotate = (_rotate == 1) ? -1 : 1;
/* Generate random y position */
_yPosition = Convert.ToInt32(_randomNumberGenerator.Next(15, 20));
/* Select random font */
System.Drawing.Font objFont = new System.Drawing.Font("Arial", 22, System.Drawing.FontStyle.Bold);
/* Output the next character */
objGraphics.DrawString(_char.ToString(), objFont, System.Drawing.Brushes.Black, _xPosition, _yPosition);
/* Get the width of the string added */
System.Drawing.SizeF _stringSize = objGraphics.MeasureString(_char.ToString(), objFont);
/* Dispose of the font */
objFont.Dispose();
/* Output the next character */
objGraphics.DrawImage(objBmp, _xPosition, _yPosition);
/* Increment x position */
_xPosition = _xPosition + (_stringSize.Width * (float)0.8);
/* Get bounding area */
_xPositionMax = _xPosition;
_yPositionMax = (int)(_yPosition + _stringSize.Height);
}
_xPositionMax += 20;
_yPositionMax += 15;
System.Drawing.Bitmap objBmpFinal = new System.Drawing.Bitmap((int)_xPositionMax, (int)_yPositionMax);
System.Drawing.Graphics objGraphicsFinal = System.Drawing.Graphics.FromImage(objBmpFinal);
System.Drawing.Rectangle _rectDest = new System.Drawing.Rectangle(0, 0, (int)_xPositionMax, (int)_yPositionMax);
objGraphicsFinal.DrawImageUnscaledAndClipped(objBmp, _rectDest);
/* Draw a curve over the image */
float _yPositionMaxCurve = _yPositionMax - 20;
System.Drawing.Pen _penCurve = new System.Drawing.Pen(System.Drawing.Color.Black, 2);
objGraphicsFinal.DrawBezier(_penCurve,
_randomNumberGenerator.Next(5, 10), _randomNumberGenerator.Next(5, (int)_yPositionMaxCurve),
_randomNumberGenerator.Next((int)(_xPositionMax / 6), (int)(_xPositionMax / 5)), _randomNumberGenerator.Next((int)(_yPositionMaxCurve / 2), (int)_yPositionMaxCurve), // y2
_randomNumberGenerator.Next((int)(_xPositionMax / 4), (int)(_xPositionMax / 3)), _randomNumberGenerator.Next(5, (int)_yPositionMaxCurve), // y3
_randomNumberGenerator.Next((int)(_xPositionMax - 5), (int)_xPositionMax), _randomNumberGenerator.Next(5, (int)_yPositionMaxCurve)); // y4
_penCurve.Dispose();
/* Draw diagonal lines */
System.Drawing.Pen _penHatch = new System.Drawing.Pen(System.Drawing.Color.Black, 1);
for (int _i = -100; _i < _xPositionMax; _i += ((int)_xPositionMax / 8))
{
float _bottomPos = ((float)Math.Tan((Math.PI * 45 / 180.0)) * _yPositionMax);
objGraphicsFinal.DrawLine(_penHatch, _i, 0, _bottomPos + _i, _yPositionMax);
}
for (int _i = 0; _i < (_xPositionMax + 100); _i += ((int)_xPositionMax / 8))
{
float _bottomPos = ((float)Math.Tan((Math.PI * 45 / 180.0)) * _yPositionMax);
objGraphicsFinal.DrawLine(_penHatch, _i, 0, ((-_bottomPos) + _i), _yPositionMax);
}
_penHatch.Dispose();
/* Draw bounding rectangle */
System.Drawing.Pen _penBorder = new System.Drawing.Pen(System.Drawing.Color.Black, 1);
objGraphicsFinal.DrawRectangle(_penBorder, 0, 0, (int)(_xPositionMax - 1), (int)(_yPositionMax - 1));
_penBorder.Dispose();
/* Draw random speckles */
for (int _speckle = 0; _speckle < 100; _speckle++)
{
/* Generate a random colour */
System.Drawing.Color _speckleColor = System.Drawing.Color.FromArgb((byte)_randomNumberGenerator.Next(0, 255), (byte)_randomNumberGenerator.Next(0, 255), (byte)_randomNumberGenerator.Next(0, 255));
/* Create a brush */
System.Drawing.SolidBrush _speckleBrush = new System.Drawing.SolidBrush(_speckleColor);
/* Select random font */
System.Drawing.Font _speckleFont = new System.Drawing.Font(strFont[_randomNumberGenerator.Next(0, (strFont.Length - 1))], _randomNumberGenerator.Next(2, 6), System.Drawing.FontStyle.Regular);
/* Get speckle character */
int i = Convert.ToInt32(_randomNumberGenerator.Next(0, (strArray.Length - 1)));
string _speckleCharacter = strArray[i].ToString();
/* Draw speckle */
objGraphicsFinal.DrawString(_speckleCharacter, _speckleFont, _speckleBrush, _randomNumberGenerator.Next(0, (int)_xPositionMax), _randomNumberGenerator.Next(0, (int)_yPositionMax));
/* Dispose of objects */
_speckleBrush.Dispose();
_speckleFont.Dispose();
}
/* Output the image */
Response.ContentType = "image/GIF";
objBmpFinal.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Gif);
objGraphics.Dispose();
objGraphicsFinal.Dispose();
objBmpFinal.Dispose();
objBmp.Dispose();
/* End the response */
Response.End();
}
}
}
这里有一些图片显示了它应该是什么样子以及它在 Win 2008R2 64 上的样子。
它应该看起来如何：
不工作！！！！
我刚拿到这台电脑，所以可能有些“角色”没有打开（ASP.NET、.NET3.5、静态内容都打勾）。
有人有什么好主意吗？