最近有个项目加入了验证码功能，就从自己博客以前的代码中找到直接使用，直接访问验证码页面报错如下：
Application Exception System.ArgumentException The requested FontFamily could not be found [GDI+ status: FontFamilyNotFound] Description: HTTP 500.Error processing request. Details: Non-web exception. Exception origin (name of application or object): System.Drawing. Exception stack trace: at System.Drawing.GDIPlus.CheckStatus (Status status) [0x00000] in <filename unknown>:0 at System.Drawing.FontFamily..ctor (GenericFontFamilies genericFamily) [0x00000] in <filename unknown>:0 at (wrapper remoting-invoke-with-check) System.Drawing.FontFamily:.ctor (System.Drawing.Text.GenericFontFamilies) at System.Drawing.FontFamily.get_GenericMonospace () [0x00000] in <filename unknown>:0 at EnterpriseShow.UI.Manager.AjaxHandle.ValidCode.ProcessRequest (System.Web.HttpContext context) [0x00000] in <filename unknown>:0 at System.Web.HttpApplication+<Pipeline>c__Iterator1.MoveNext () [0x00000] in <filename unknown>:0 at System.Web.HttpApplication.Tick () [0x00000] in <filename unknown>:0
1、首先从window上copy字体安装到centos中
安装字体方法如下：本段文字来自唧唧的博客
在CentOS中安装中文字体作者：唧唧1、先从你本机 C:\Windows\Fonts 拷贝或者网络上下载你想要安装的字体文件（*.ttf文件）到 /usr/share/fonts/chinese/TrueType 目录下（如果系统中没有此目录，则自行mkdir创建，亦可重命名为自己喜欢的文件夹名）2、修改字体文件的权限，使root用户以外的用户也可以使用# cd /usr/share/fonts/chinese/TrueType# chmod 755 *.ttf3、建立字体缓存# mkfontscale （如果提示 mkfontscale: command not found，需自行安装 # yum install mkfontscale ）# mkfontdir # fc-cache -fv （如果提示 fc-cache: command not found，则需要安装# yum install fontconfig ）4、重启计算机# reboot |
2、安装完毕后，我们在代码中指定要使用的字体
context.Response.ContentType = "image/gif"; Bitmap basemap = new Bitmap(200, 60); Graphics garph1 = Graphics.FromImage(basemap); garph1.FillRectangle(new SolidBrush(Color.White), 0, 0, 200, 60); Font font = new Font("consola.ttf", 48, FontStyle.Bold, GraphicsUnit.Pixel); Random r = new Random(); string letters = "ABCDEFGHIJKLMNPQRSTUVWXYZ"; string letter; StringBuilder s = new StringBuilder(); for (int i = 0; i < 5; i++) { letter = letters.Substring(r.Next(0, letters.Length - 1), 1); s.Append(letter); garph1.DrawString(letter, font, new SolidBrush(Color.Black), i * 38, r.Next(0, 15)); } Pen linePen = new Pen(new SolidBrush(Color.Black), 2); for (int x = 0; x < 6; x++) { garph1.DrawLine(linePen, new Point(r.Next(0, 199), r.Next(0, 59)), new Point(r.Next(0, 199), r.Next(0, 59))); } basemap.Save(context.Response.OutputStream, ImageFormat.Gif); context.Session["CheckCode"] = s.ToString(); //存入Session，用于对比验证 context.Response.End();
再次访问清晰可见啊
记录下来备忘。
asp.net中ashx生成验证码代码放在Linux(centos)主机*问时无法显示问题,布布扣,bubuko.com