.NET Core利用skiasharp文字头像生成方法教程（基于docker发布）

  private String ResolveName(String imageText)
  {
   imageText.Replace("?", "").Replace(":", "").Replace("?", "").Replace("*", "").Replace("<", "").Replace(">", "").Replace(@"/", "").Replace(@"\", "").Replace(@"|", "").Replace("\"", "");//去除路径不支持的信息
   imageText = imageText.Trim(' ');//去除空格信息
   String temp2 = imageText.Substring(0, 1);//根据第一位的数据判断是走英文规则还是中文规则，都不是的话就是取前两位
   if (RegexLib.IsChineseCharacter(temp2))
   {
    //UserName = UserName.Trim(' ');
    if (imageText.Length > 2 & imageText.Length <= 3)
    {
     imageText = imageText.Substring(1, 2);
    }
    else if (imageText.Length >= 3)
    {
     imageText = imageText.Substring(imageText.Length - 2, 2);
    }
   }
   else if (RegexLib.IsEnglishCharacter(temp2))
   {
    String[] temp1 = imageText.Split(' ');
    if (temp1.Length == 2)
    {
     imageText = (temp1[0].Substring(0, 1) + temp1[1].Substring(0, 1)).ToUpper();
    }
    else
    {
     if (imageText.Length > 2)
     {
      imageText = imageText.Substring(0, 2).ToUpper();
     }
    }
   }
   else
   {
    if (imageText.Length > 2)
    {
     imageText = imageText.Substring(0, 2);
    }
   }
   imageName = imageText;
   return imageName;
  }

  public byte[] Create()
  {
   String name = imageName + ".jpg";
   SKBitmap bmp = new SKBitmap(128, 128);
   String str = imageName;

   using (SKCanvas canvas = new SKCanvas(bmp))
   {
    Random r = new Random();
    int num = r.Next(0, 9);
    canvas.DrawColor(colors[num]); // colors是图片背景颜色集合，这里代码就不贴出来了，随机找一个
    using (SKPaint sKPaint = new SKPaint())
    {
     sKPaint.Color = SKColors.White;//字体颜色
     sKPaint.TextSize = 39;//字体大小
     sKPaint.IsAntialias = true;//开启抗锯齿
     sKPaint.Typeface = SkiaSharp.SKTypeface.FromFamilyName("微软雅黑", SKTypefaceStyle.Bold);//字体
     SKRect size = new SKRect();
     sKPaint.MeasureText(str, ref size);//计算文字宽度以及高度
     float temp = (128 - size.Size.Width) / 2;
     float temp1 = (128 - size.Size.Height) / 2;
     canvas.DrawText(str, temp, temp1 - size.Top, sKPaint);//画文字
    }
    //保存成图片文件
    using (SKImage img = SKImage.FromBitmap(bmp))
    {
     using (SKData p = img.Encode(SKEncodedImageFormat.Jpeg, 100))
     {
      return p.ToArray();
      //using (var stream = File.Create(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "photoImage", name)))
      //{
      // stream.Write(p.ToArray(), 0, p.ToArray().Length);
      // return stream;
      //}
     }
    }
   }
  }

#基于 `microsoft/dotnet:latest` 来构建我们的镜像
FROM microsoft/dotnet:latest

#拷贝项目publish文件夹中的所有文件到 docker容器中的publish文件夹中 
COPY . /publish /publish/

#ENV LANG C.UTF-8
#ENV LANGUAGE C.UTF-8
#ENV LC_ALL C.UTF-8
COPY MSYH.TTC /usr/share/fonts/dejavu
COPY MSYHL.TTC /usr/share/fonts/dejavu
COPY MSYHBD.TTC /usr/share/fonts/dejavu

#更换软件源为国内的软件源
RUN mv /etc/apt/sources.list /etc/apt/sources.list.bak && \
 echo "deb http://mirrors.163.com/debian/ jessie main non-free contrib" >/etc/apt/sources.list && \
 echo "deb http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib" >>/etc/apt/sources.list && \
 echo "deb-src http://mirrors.163.com/debian/ jessie main non-free contrib" >>/etc/apt/sources.list && \
 echo "deb-src http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib" >>/etc/apt/sources.list
#RUN apt-get update && apt-get install -y libfontconfig1 && apt-get install -y fontconfig
RUN apt-get update && apt-get install -y fontconfig

#设置工作目录为 `/publish` 文件夹，即容器启动默认的文件夹
WORKDIR /publish

#设置Docker容器对外暴露5000端口
EXPOSE 5000

#使用`dotnet WebApplication1.dll`来运行应用程序

CMD ["dotnet", "WebApplication1.dll"]