Click here to Skip to main content
15,868,016 members
Home / Discussions / WPF
   

WPF

 
GeneralRe: Converting a byte[] to a ImageSource means huge memory leak Pin
Gerry Schmitz24-Jan-22 21:26
mveGerry Schmitz24-Jan-22 21:26 
GeneralRe: Converting a byte[] to a ImageSource means huge memory leak Pin
Starwer25-Jan-22 7:56
Starwer25-Jan-22 7:56 
AnswerRe: Converting a byte[] to a ImageSource means huge memory leak Pin
Richard Deeming25-Jan-22 21:51
mveRichard Deeming25-Jan-22 21:51 
GeneralRe: Converting a byte[] to a ImageSource means huge memory leak Pin
Starwer26-Jan-22 9:10
Starwer26-Jan-22 9:10 
GeneralRe: Converting a byte[] to a ImageSource means huge memory leak Pin
Gerry Schmitz27-Jan-22 6:33
mveGerry Schmitz27-Jan-22 6:33 
GeneralRe: Converting a byte[] to a ImageSource means huge memory leak Pin
Starwer27-Jan-22 20:29
Starwer27-Jan-22 20:29 
GeneralRe: Converting a byte[] to a ImageSource means huge memory leak Pin
lmoelleb3-Feb-22 4:58
lmoelleb3-Feb-22 4:58 
GeneralRe: Converting a byte[] to a ImageSource means huge memory leak Pin
Starwer5-Feb-22 0:28
Starwer5-Feb-22 0:28 
Thanks for your answer.

I've tried the fllowing:
stream.Length = 0;
stream.Capacity = 0;


But I coudn't access those properties from a MemoryStream.
So I've actually followed your advice and developped my own Stream implementation. This allowed to track what was called at least. This unfortunately didn't solve the problem. I could only see that the Close() function was called, that I could clear the Buffer that was stored there. However the finalized never gets called, giving a hint that the parent ImageSource or Image never get freed either.
Moreover, using my own Stream prevents me from freezing the ImageSource (I don't know why).

Here follows the implementation of the Stream I used:
public class ManagedMemoryStream : Stream
 {
     private int Id;
     private static int Index = 0;
     private static int Counter = 0;

     private byte[]? Buffer;

     public override bool CanRead => true;

     public override bool CanSeek => false;

     public override bool CanWrite => false;

     public override long Length => _Length;
     private long _Length;

     public override long Position { get; set; }

     public override void Close()
     {
         System.Diagnostics.Debug.WriteLine($"ManagedMemoryStream: Close {Id} / {Counter}");
         base.Close();
         Dispose(true);
         Buffer = null;
     }

     public ManagedMemoryStream(byte[] buffer)
     {
         Id = Index++;
         System.Diagnostics.Debug.WriteLine($"ManagedMemoryStream: Construct {Id} / {++Counter}");

         Buffer = buffer;
         _Length = Buffer.Length;

     }


     ~ManagedMemoryStream()
     {
         System.Diagnostics.Debug.WriteLine($"ManagedMemoryStream: Finalize {Id} / {--Counter}");
         Dispose(false);
     }

     public override void Flush()
     {
         System.Diagnostics.Debug.WriteLine($"ManagedMemoryStream: Flush {Id} / {Counter}");
     }

     public override int Read(byte[] buffer, int offset, int count)
     {
         //System.Diagnostics.Debug.WriteLine($"ManagedMemoryStream: Read {Id}, {offset}, {count} / {Counter}");
         if (count == 0 || Buffer is null) return 0;
         int remaining = (int)(Buffer.Length - Position);
         if (count > remaining) count = remaining;

         Array.Copy(Buffer, Position, buffer, offset, count);
         Position += count;
         _Length -= count;

         return count;
     }

     public override long Seek(long offset, SeekOrigin origin)
     {
         throw new NotImplementedException();
     }

     public override void SetLength(long value)
     {
         throw new InvalidOperationException();
     }

     public override void Write(byte[] buffer, int offset, int count)
     {
         throw new InvalidOperationException();
     }
 }

GeneralRe: Converting a byte[] to a ImageSource means huge memory leak Pin
lmoelleb6-Feb-22 3:27
lmoelleb6-Feb-22 3:27 
AnswerRe: Converting a byte[] to a ImageSource means huge memory leak Pin
Starwer30-Jan-22 5:04
Starwer30-Jan-22 5:04 
GeneralRe: Converting a byte[] to a ImageSource means huge memory leak Pin
Gerry Schmitz30-Jan-22 5:23
mveGerry Schmitz30-Jan-22 5:23 
GeneralRe: Converting a byte[] to a ImageSource means huge memory leak Pin
Starwer30-Jan-22 7:45
Starwer30-Jan-22 7:45 
SuggestionRe: Converting a byte[] to a ImageSource means huge memory leak Pin
Richard Deeming30-Jan-22 21:52
mveRichard Deeming30-Jan-22 21:52 
Question(MahApp) not using style for control Pin
Super Lloyd19-Jan-22 23:07
Super Lloyd19-Jan-22 23:07 
AnswerRe: (MahApp) not using style for control Pin
Super Lloyd19-Jan-22 23:08
Super Lloyd19-Jan-22 23:08 
QuestionMarkupExtension, resource files and visual studio designer Pin
Super Lloyd16-Jan-22 6:40
Super Lloyd16-Jan-22 6:40 
QuestionTextBox Bound To Decimal - Can't Type Decimal Pin
Kevin Marois28-Dec-21 8:29
professionalKevin Marois28-Dec-21 8:29 
AnswerRe: TextBox Bound To Decimal - Can't Type Decimal Pin
Mycroft Holmes28-Dec-21 10:05
professionalMycroft Holmes28-Dec-21 10:05 
GeneralRe: TextBox Bound To Decimal - Can't Type Decimal Pin
Kevin Marois28-Dec-21 10:25
professionalKevin Marois28-Dec-21 10:25 
GeneralRe: TextBox Bound To Decimal - Can't Type Decimal Pin
Super Lloyd16-Jan-22 6:45
Super Lloyd16-Jan-22 6:45 
GeneralRe: TextBox Bound To Decimal - Can't Type Decimal Pin
Mycroft Holmes16-Jan-22 10:55
professionalMycroft Holmes16-Jan-22 10:55 
GeneralRe: TextBox Bound To Decimal - Can't Type Decimal Pin
Eddy Vluggen9-Feb-22 2:40
professionalEddy Vluggen9-Feb-22 2:40 
GeneralRe: TextBox Bound To Decimal - Can't Type Decimal Pin
Super Lloyd9-Feb-22 12:10
Super Lloyd9-Feb-22 12:10 
GeneralRe: TextBox Bound To Decimal - Can't Type Decimal Pin
Eddy Vluggen9-Feb-22 12:13
professionalEddy Vluggen9-Feb-22 12:13 
AnswerRe: TextBox Bound To Decimal - Can't Type Decimal Pin
Richard Deeming4-Jan-22 0:04
mveRichard Deeming4-Jan-22 0:04 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.