[Mono-bugs] [Bug 80786][Maj] New - Saving Image to MemoryStream faills
bugzilla-daemon at bugzilla.ximian.com
bugzilla-daemon at bugzilla.ximian.com
Sat Feb 10 14:26:10 EST 2007
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Changed by levap at bansky.net.
http://bugzilla.ximian.com/show_bug.cgi?id=80786
--- shadow/80786 2007-02-10 14:26:10.000000000 -0500
+++ shadow/80786.tmp.27756 2007-02-10 14:26:10.000000000 -0500
@@ -0,0 +1,87 @@
+Bug#: 80786
+Product: Mono: Class Libraries
+Version: 1.2
+OS:
+OS Details: Windows XP SP 2 Czech
+Status: NEW
+Resolution:
+Severity:
+Priority: Major
+Component: Sys.Drawing.
+AssignedTo: mono-bugs at ximian.com
+ReportedBy: levap at bansky.net
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL:
+Cc:
+Summary: Saving Image to MemoryStream faills
+
+Description of Problem:
+Saving System.Drawing.Image into MemoryStream throws exception.
+
+
+Steps to reproduce the problem:
+1. Create object of Image type
+2. Create MemoryStream
+3. Call Save method on Image which saves image to stream
+
+Actual Results:
+
+Unhandled Exception: System.ArgumentNullException: Argument cannot be null.
+ at (wrapper managed-to-native)
+System.Drawing.GDIPlus:GdipSaveImageToStream
+(System.Runtime.InteropServices.HandleRef,
+System.Runtime.InteropServices.UCOMIStream,System.Guid&,System.Runtime.InteropServices.HandleRef)
+ at System.Drawing.Image.Save (System.IO.Stream stream,
+System.Drawing.Imaging.ImageCodecInfo encoder, System.Drawing.I
+maging.EncoderParameters encoderParams) [0x00000]
+ at System.Drawing.Image.Save (System.IO.Stream stream,
+System.Drawing.Imaging.ImageFormat format) [0x00000]
+ at (wrapper remoting-invoke-with-check) System.Drawing.Image:Save
+(System.IO.Stream,System.Drawing.Imaging.ImageFormat
+)
+ at ImageSerialize.MainClass.ImageToString (System.Drawing.Image img)
+[0x00000]
+ at ImageSerialize.MainClass.Main (System.String[] args) [0x00000]
+
+
+Expected Results:
+Not to crash :)
+
+How often does this happen?
+Everytime
+
+Additional Information:
+Sample application
+
+using System;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.IO;
+
+namespace ImageSerialize
+{
+ class MainClass
+ {
+
+ // Returns given image as base64 string.
+ public static string ImageToString(Image img)
+ {
+ MemoryStream stream = new MemoryStream();
+ img.Save(stream, ImageFormat.Png);
+ stream.Position = 0;
+ int LengthOfBuffer = (int) stream.Length;
+ byte[] buff = new byte[LengthOfBuffer];
+ stream.Read(buff, 0, LengthOfBuffer);
+ return(Convert.ToBase64String(buff));
+ }
+
+ public static void Main(string[] args)
+ {
+ Image img = Image.FromFile(@"C:\someimage.png");
+ string smg = ImageToString(img);
+
+ Console.WriteLine(smg);
+ }
+ }
+}
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