c# 中 pdf文件转jpg?
我写了以下一段代码:
string filePath = "E:\\acquire\\20100202155730_Pic.pdf";
FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);
BinaryReader br = new BinaryReader(fs);
byte[] fromImage = br.ReadBytes((int)fs.Length);
fs.Close();
br.Close();
// Read the image from the byte variable into a bitmap variable
MemoryStream fromImageStream = new MemoryStream();
fromImageStream.Write(fromImage, 0, fromImage.Length);
System.Drawing.Image image = System.Drawing.Image.FromStream(fromImageStream, true);
image.Save("foo.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
DoOcrProcess("E:\\acquire\\20100203102846_Pic.bmp");
程序运行到System.Drawing.Image.FromStream(fromImageStream, true);出了一个Exception:"Parameter is not valid."?