[saving animated GIF] Help...
 

if I want to send an animated GIF format picture, how do I save the picture in destination folder?
I already using "System.Drawing.Imaging.ImageFormat.gif", but the GIF picture no longer animated, it become like JPEG format.
another help please...

Re: [saving animated GIF] Help...
 

Could you please post your current image saving code. Thanks!

Re: [saving animated GIF] Help...
 

Never mind the code. Here's a (generic) function to save byte array to a file (VB.NET 2005 and newer)

Public Function SaveFile(ByVal FileName As String, ByRef Buffer() As Byte, ByVal OverWrite As Boolean) As Boolean

  ' Save a bytearray to a file

  ' Returns True if file is saved, otherwise returns false

  ' Notice: Exception handling is missing!

  If My.Computer.FileSystem.FileExists(FileName) Then

    If OverWrite Then

      My.Computer.FileSystem.DeleteFile(FileName)

      My.Computer.FileSystem.WriteAllBytes(FileName, Buffer, False)

      Return True

    Else

      ' Don't save, file exists

      Return False

    End If

  Else

    My.Computer.FileSystem.WriteAllBytes(FileName, Buffer, False)

    Return True

  End If



End Function

And you call it (example):

If SaveFile("C:\my.gif", ByteBuffer, False) Then

  MessageBox.Show("File saved successfully", "Save File", MessageBoxButtons.OK, MessageBoxIcon.Information)

Else

  MessageBox.Show("File exists or could not be written", "Save File", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)

End

Another example:

SaveFile("C:\my.gif", ByteBuffer, True)

saves the file and overwrites the file if it exists.

One thing to be careful is array indexing which starts from the zero. If you declare an array

Buffer(4) As Byte

, you'll have an array with five bytes (Buffer(0), Buffer(1),...Buffer(4)). Forgetting this can easily lead to "off-by-one" errors and hard-to-catch errors.

HTH

Use this code to save animated GIF. It might be possible that "normal" .NET's image saving methods (or file formats to be precise) do not support animated GIFs. Saving an animated GIF as "raw" data is 100% sure way to ensure it is saved correctly.

Re: [saving animated GIF] Help...
 

thanks for the code...
I'll try it first...

Re: [saving animated GIF] Help...
 

Dim PACKET_SIZE As UInt16 = 4096

                Dim Reader As BinaryReader

                Dim ReadBuffer(PACKET_SIZE - 1) As Byte

                Dim NData As Int32

                Dim MStream As MemoryStream

                Dim LData As Int32



                Reader = New BinaryReader(clientSocket.GetStream)

                ' Read Length of data (Int32)

                NData = Reader.ReadInt32

                ' Now comes the data, save it in a memory stream

                MStream = New MemoryStream

                While NData > 0

                    LData = clientSocket.GetStream.Read(ReadBuffer, 0, PACKET_SIZE)

                    MStream.Write(ReadBuffer, 0, LData)

                    NData -= LData

                End While



                If SaveFile("C:\my.gif", ReadBuffer, False) Then

                    MessageBox.Show("File saved successfully", "Save File", MessageBoxButtons.OK, MessageBoxIcon.Information)

                Else

                    MessageBox.Show("File exists or could not be written", "Save File", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)

                End If

it's my code went socket receive picture n save it.
still cannot save animated GIF picture.
the code are working perfectly, but the saved picture can't move...

I'm not changing anything for the function...

Re: [saving animated GIF] Help...
 

Actually you're saving incoming data to the memory stream, not in the temporary byte buffer. You should save the content of the memory stream.

Change this single line

If SaveFile("C:\my.gif", MStream.ToArray(), False) Then

ToArray method returns the content of the whole memory stream as a byte array.

And one reminder again. Close and dispose streams, sockets etc. after using them :)

If the code still doesn't work after making the code change above, could you please attach your original animated gif image. Not sure if I have in hand any easily findable animated gif to test with :-/

Re: [saving animated GIF] Help...
 

Your code working GREAT !!
Finally I found what's wrong...
my mistake is I save the selected GIF picture to JPG format before displaying it...
by doing that, I send and save the JPG format instead of the GIF file...
that's why my GIF never move...

sorry to trouble U.

Re: [saving animated GIF] Help...
 

Great!

There wasn't any trouble :)