Re: VB6 create image, save image to memory, send image to asp

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On May 1, 11:52 am, DigitalH...@xxxxxxxxx wrote:
On May 1, 11:17 am, DigitalH...@xxxxxxxxx wrote:

in VB xDLL, a picture is generated ( GDI, Device Context, etc ) in a
picture box, then save the picture ( raw data? ) to byte array or
stream, and not to disk. then, send the binary data to the ASP to be
handled, which is Response.BinaryWrite or something.

Forget the bytearray/stream to binary, then raw write. Lets do it this
way.

convert the data in a picturebox to a base64 string. All processing
done in memory, nothing to disk.

Here is the .net solutions, but i need it in VB6....

Public Function BitmapToBase64(ByVal image As System.Drawing.Bitmap)
As String
Dim base64 As String
Dim memory As New System.IO.MemoryStream()
image.Save(memory, Imaging.ImageFormat.Bmp)
base64 = System.Convert.ToBase64String(memory.ToArray)
memory.Close()
memory = Nothing
Return base64
End Function

Public Function BitmapFromBase64(ByVal base64 As String) As
System.Drawing.Bitmap
Dim oBitmap As System.Drawing.Bitmap
Dim memory As New
System.IO.MemoryStream(Convert.FromBase64String(base64))
oBitmap = New System.Drawing.Bitmap(memory)
memory.Close()
memory = Nothing
Return oBitmap
End Function

Ok, I'll make it even more simple.

1. Create a mapped I/O buffer in memory ( binary )
2. Save data in a picturebox or textbox to the buffer.
3. Binary data is converted to base64
4. Read data into a varable, save the varable as a text file on the
local hard disk.

.

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