cmd.Parameters.Add("@CustomerID", SqlDbType.Int, 5);
   cmd.Parameters.Add("@CompanyName", SqlDbType.Image, 69812);
   cmd.Parameters[0].Value= 1;
   cmd.Parameters[1].Value=b;     

byte[]    b=(byte[])dr["data"];
怎样把 b 变成 bt=new Bitmap()；bitmap()构造函数可以用的？？
Stream 类型！

兄弟帮忙啊，小弟感激不尽！！

SqlConnection pubsConn = new SqlConnection("Data Source=localhost;Integrated Security=SSPI;Initial Catalog=pubs;");
SqlCommand logoCMD = new SqlCommand("SELECT pub_id, logo FROM pub_info", pubsConn);

FileStream fs;                          // Writes the BLOB to a file (*.bmp).
BinaryWriter bw;                        // Streams the BLOB to the FileStream object.

int bufferSize = 100;                   // Size of the BLOB buffer.
byte[] outbyte = new byte[bufferSize];  // The BLOB byte[] buffer to be filled by GetBytes.
long retval;                            // The bytes returned from GetBytes.
long startIndex = 0;                    // The starting position in the BLOB output.

string pub_id = "";                     // The publisher id to use in the file name.

// Open the connection and read data into the DataReader.
pubsConn.Open();
SqlDataReader myReader = logoCMD.ExecuteReader(CommandBehavior.SequentialAccess);

while (myReader.Read())
{
  // Get the publisher id, which must occur before getting the logo.
  pub_id = myReader.GetString(0);  

  // Create a file to hold the output.
  fs = new FileStream("logo" + pub_id + ".bmp", FileMode.OpenOrCreate, FileAccess.Write);
  bw = new BinaryWriter(fs);

  // Reset the starting byte for the new BLOB.
  startIndex = 0;

  // Read the bytes into outbyte[] and retain the number of bytes returned.
  retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize);

  // Continue reading and writing while there are bytes beyond the size of the buffer.
  while (retval == bufferSize)
  {
    bw.Write(outbyte);
    bw.Flush();

    // Reposition the start index to the end of the last buffer and fill the buffer.
    startIndex += bufferSize;
    retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize);
  }

  // Write the remaining buffer.
  bw.Write(outbyte, 0, (int)retval - 1);
  bw.Flush();

  // Close the output file.
  bw.Close();
  fs.Close();
}

// Close the reader and the connection.
myReader.Close();
pubsConn.Close();

我想从数据库里查到这些数据，让它直接在控件PictureBoxl里显示

但，我不想保存那些从数据库中的<binary>数据！。

PictureBox.Image,需要一个Image类型的数据，而，在数据库中定义的字段本来就为Image的类型！（应该说PictureBox.iImage=(Image)bytes是可以的）
我不知道什么直接利用数据库的数据可以让PictureBox.Image可以用的！

public void init(string url)
  {  
   try
   {
                  bmap=new Bitmap(url);
   }
   catch(Exception e)
   {
    MessageBox.Show(e.Message);

   }   
   pictureBox1.Image=(Image) bmap;
  }