从Stream转换System.Drawing.Image-参数无效

Question

I am trying to convert

System.Drawing.Image from Stream

but its throwing Parameter not valid exception.

 Stream p_sImageStream = GenerateStreamFromString(p_sImage);
 System.Drawing.Image oIM = Bitmap.FromStream(p_sImageStream);

my p_sImage is "56427673422d0cbd5dfdfebc_M-19__wide-1.JPG"

Answer 1

The parameter to GenerateStreamFromString is not a filename, it's expected to contain the actual data.

If you have the filename of a JPEG file, use File.OpenRead to get a stream you can pass to Bitmap.FromStream , or else just use new Bitmap(filename) -- this constructor overload opens and reads a file.

Answer 2

Try this

string p_sImage = @"c:\temp\56427673422d0cbd5dfdfebc_M-19__wide-1.JPG";
FileStream stream = new FileStream(p_sImage, FileMode.Open);
System.Drawing.Image oIM = Bitmap.FromStream(stream);