将文本文件的内容或者文字保存成图片

http://blog.csdn.net/net_lover/article/details/6683211

调用方法：

ConvertTextFileToImage(Server.MapPath("~/Log.txt"),Server.MapPath("~/Log.png"));

实现代码：

void ConvertTextFileToImage(String textFile,String imageFile)
{
  System.Drawing.Font drawFont = new System.Drawing.Font("宋体", 12);
  System.Drawing.Bitmap image = new System.Drawing.Bitmap(1, 1);
  System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
  String text = System.IO.File.ReadAllText(textFile, Encoding.GetEncoding("GB2312"));
  System.Drawing.SizeF sf = g.MeasureString(text, drawFont, 1024); //设置一个显示的宽度
  image = new System.Drawing.Bitmap(image, new System.Drawing.Size(Convert.ToInt32(sf.Width), Convert.ToInt32(sf.Height)));
  g = System.Drawing.Graphics.FromImage(image);
  g.Clear(System.Drawing.Color.White);
  g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
  g.DrawString(text, drawFont, System.Drawing.Brushes.Black, new System.Drawing.RectangleF(new System.Drawing.PointF(0, 0), sf));
  image.Save(imageFile, System.Drawing.Imaging.ImageFormat.Png);
  g.Dispose();
  image.Dispose();
}