store image

store image

• David N.4117

  Well its not exactlty hard is it Just a few lines of code.

  You basically taking all the bytes from one and placing it into the other stream, doing it in chunks is easier on memory usage etc.

  
  

• dgVisioscopie

  Thanks my dear

  I am asking ALLA (God)

  to give you what you want

  
  
  

• Alex Yakushev

  seroiusly there must be an easier way to convert a filestream object into a memory stream i'm amazed by how many examples i'm seeing that require us to manually create a fixed length TEMP buffer and move data from one stream to the other.

  i'm simply amazed, i a bad way :(

  
  
  

• John P. Nelson

  i thought there was some reason like your suggestion. I noticed the Stream and FileStream class does not have the ToArray() method, while the memory stream does.

  if i'm using an OpenFileDialog to grab a file (ie. a Stream or FileStream) how can i convert that into a MemoryStream, so i can access the ToArray() method easily, then As u said, i would love to utilise the memorystream to hand the block copy of bytes.

  
  
  

• KluchCode

  So, now i hope ALLA (God) gives me that 20 million is wish for
  
  
  

• Peter Koller

  Here is a little example:
  
  

  Image image = Image.FromFile(@"c:\myimage.bmp"); using(MemoryStream stream = new MemoryStream()) { image.Save( stream ); byte[] buffer = steam.ToByteArray(); SaveImage( "myimage", buffer ); }

  
  
  

  public static SaveImage( string name, byte[] imageData ) { //use the web.config to store the connection string SqlConnection connection = new SqlConnection(ConfigurationSettings.AppSettings["DSN"]); SqlCommand command = new SqlCommand( "INSERT INTO Image(name, data) VALUES (@name, @data)", connection ); SqlParameter pName = new SqlParameter( "@name", SqlDbType.VarChar,50 ); pName.Value = name; command.Parameters.Add( pName ); SqlParameter pData = new SqlParameter( "@data", SqlDbType.Image ); pData.Value = imageData; command.Parameters.Add( pData ); try { connection.Open(); int numRowsAffected = command.ExecuteNonQuery(); } finally { connection.Close(); } }

  
  
  
  

• Nima_DK

  You can open and stream and block copy the bytes that you have readed to an array, but this is a lot easier! All the growing of the byte array is done by the MemoryStream class.
  
  
  

• Frank X. Huang

  Stream is an abstract class... So no constructure is defined...
  

• R.X.

  Amen...

  
  
  

• grsmith

  string sFileName="c:\yourfilepath.txt";
  int iLength = 2048;
  byte[] buffer = new byte[iLength];
  
  MemoryStream stream = new MemoryStream();
  
  using(FileStream objFileIn = new FileStream(sFileName,FileMode.Open))
  {
  
  iLength = objFileIn.Read(buffer, 0, buffer.Length)
  
  while (iLength != 0)
  {
  stream.Write(buffer, 0, iLength);
  iLength = objFileIn.Read(buffer, 0, buffer.Length)
  }
  
  objFileIn.Close();
  }
  
  
  Replace sFileName with the path given by the dialog...
  
  

• Mosha

  PJ, can u elaborate on why you have used a memory stream in the following, as opposed to just a System.IO.Stream

  
  Image image = Image.FromFile(@"c:\myimage.bmp");
  
  using(MemoryStream stream = new MemoryStream())
  {
  image.Save( stream );
  
  byte[] buffer = stream.ToByteArray();
  SaveImage( "myimage", buffer );
  }
  

  is the memory stream the only way to do ' .ToByteArray()' Also, why do u SaveImage - what does that method do

  note: i updated the byte[] line - it had a typo.

  
  
  
• store image