我使用以下代码让服务器通过蓝牙在客户端之间发送/接收一些字符串，并将一些文件发送到客户端：
try
{
//////////WELCOME DATA MESSAGE TO BE SENT (START)///////////////
byte[] sync_welcome_sent = new byte[2] { 0x55, 0xAA };
byte[] message_type_welcome_sent = new byte[1] { 0x00 }; //will need if statement
byte[] number_of_slides_welcome_sent = BitConverter.GetBytes((System.Int16)Directory.GetFiles(image_path).Length); //count number of pictures in local folder
byte[] recording_state_welcome_sent = new byte[1] { 0x00 }; //will need if statement
byte[] welcome_data_message_sent = new byte[sync_welcome_sent.Length + message_type_welcome_sent.Length + number_of_slides_welcome_sent.Length + recording_state_welcome_sent.Length];
//copy all byte array into one big packet to be sent
sync_welcome_sent.CopyTo(welcome_data_message_sent, 0);
message_type_welcome_sent.CopyTo(welcome_data_message_sent, sync_welcome_sent.Length);
number_of_slides_welcome_sent.CopyTo(welcome_data_message_sent, sync_welcome_sent.Length + message_type_welcome_sent.Length);
recording_state_welcome_sent.CopyTo(welcome_data_message_sent, sync_welcome_sent.Length + message_type_welcome_sent.Length + number_of_slides_welcome_sent.Length);
//send the packet
mStream.Write(welcome_data_message_sent, 0, welcome_data_message_sent.Length);
//clear the stream for next packet
mStream.Flush();
//display the message to the user
updateUI("Sent: " + Encoding.ASCII.GetString(welcome_data_message_sent));
////////////WELCOME DATA MESSAGE TO BE SENT (END)///////////////
///////////WELCOME DATA MESSAGE TO BE RECEIVED (START)//////////
byte[] welcome_data_message_received = new byte[5];
mStream.Read(welcome_data_message_received, 0, welcome_data_message_received.Length);
//clear the stream for next packet
mStream.Flush();
//instantiate arrays for received data
byte[] sync_welcome_received = new byte[2];
byte[] message_type_welcome_received = new byte[1];
byte[] slideID_welcome_received = new byte[2];
//copy bytes from received packet to separate arrays
Array.Copy(welcome_data_message_received, 0, sync_welcome_received, 0, 2);
Array.Copy(welcome_data_message_received, 2, message_type_welcome_received, 0, 1);
Array.Copy(welcome_data_message_received, 3, slideID_welcome_received, 0, 2);
//reverse all byte arrays
if (BitConverter.IsLittleEndian)
{
Array.Reverse(sync_welcome_received);
Array.Reverse(message_type_welcome_received);Array.Reverse(slideID_welcome_received);
}
//retrieve the received data into original format
int message_type_welcome_received_final = (int)message_type_welcome_received[0]; //then convert all sbyte array's bytes to int
int slideID_begin_from = BitConverter.ToInt16(slideID_welcome_received, 0); //then convert all sbyte array's bytes to int
updateUI("Received: " + Encoding.ASCII.GetString(welcome_data_message_received));
/////////////WELCOME DATA MESSAGE TO BE RECEIVED (END)///////////////
for (int i = slideID_begin_from; i <= count; i++)
{
//////////////SLIDE DATA MESSAGE TO BE SENT (START)//////////////
byte[] sync_data_sent = new byte[2] { 0x55, 0xAA };
byte[] message_type_data_sent = new byte[1] { 0x01 }; //will need if statement
byte[] slide_id_data_sent = BitConverter.GetBytes((System.Int16)i); //slideID that is being sent to the client
byte[] image_only_data_sent = new byte[1] { 0x00 }; //will need if statement
byte[] image_data_data_sent = File.ReadAllBytes(picture_paths[i]);
byte[] image_data_length_data_sent = BitConverter.GetBytes(image_data_data_sent.Length);
byte[] text_data_data_sent;
byte[] text_data_length_data_sent;
if (!is_image_only)
{
text_data_data_sent = Encoding.ASCII.GetBytes(slide_notes[i]);
text_data_length_data_sent = BitConverter.GetBytes(text_data_data_sent.Length);
}
else
{
text_data_data_sent = new byte[0];
text_data_length_data_sent = new byte[0];
}
byte[] slide_data_message_sent = new byte[sync_data_sent.Length + message_type_data_sent.Length + slide_id_data_sent.Length + image_only_data_sent.Length + image_data_data_sent.Length + text_data_data_sent.Length + image_data_length_data_sent.Length + text_data_length_data_sent.Length];
//copy all byte array into one big packet to be sent
sync_data_sent.CopyTo(slide_data_message_sent, 0);
message_type_data_sent.CopyTo(slide_data_message_sent, sync_data_sent.Length);
slide_id_data_sent.CopyTo(slide_data_message_sent, sync_data_sent.Length + message_type_data_sent.Length);
image_only_data_sent.CopyTo(slide_data_message_sent, sync_data_sent.Length + message_type_data_sent.Length + slide_id_data_sent.Length);
image_data_data_sent.CopyTo(slide_data_message_sent, sync_data_sent.Length + message_type_data_sent.Length + slide_id_data_sent.Length + image_only_data_sent.Length);
text_data_data_sent.CopyTo(slide_data_message_sent, sync_data_sent.Length + message_type_data_sent.Length + slide_id_data_sent.Length + image_only_data_sent.Length + image_data_data_sent.Length);
image_data_length_data_sent.CopyTo(slide_data_message_sent, sync_data_sent.Length + message_type_data_sent.Length + slide_id_data_sent.Length + image_only_data_sent.Length + image_data_data_sent.Length + text_data_data_sent.Length);
text_data_length_data_sent.CopyTo(slide_data_message_sent, sync_data_sent.Length + message_type_data_sent.Length + slide_id_data_sent.Length + image_only_data_sent.Length + image_data_data_sent.Length + text_data_data_sent.Length + image_data_length_data_sent.Length);
//send the packet
mStream.Write(slide_data_message_sent, 0, slide_data_message_sent.Length);
//clear the stream for next packet
mStream.Flush();
//display the message to the user
updateUI("Sent: " + Encoding.ASCII.GetString(slide_data_message_sent));
/////////SLIDE DATA MESSAGE TO BE SENT (END)/////////////////
/////////SLIDE DATA MESSAGE TO BE RECEIVED (START)///////////
byte[] slide_data_message_received = new byte[5];
mStream.Read(slide_data_message_received, 0, slide_data_message_received.Length);
//clear the stream for next packet
mStream.Flush();
//instantiate arrays for received data
byte[] sync_slide_received = new byte[2];
byte[] message_type_slide_received = new byte[1];
byte[] slideID_slide_received = new byte[2];
//copy bytes from preceived packet to separate arrays
Array.Copy(slide_data_message_received, 0, sync_slide_received, 0, 2);
Array.Copy(slide_data_message_received, 2, message_type_slide_received, 0, 1);
Array.Copy(slide_data_message_received, 3, slideID_slide_received, 0, 2);
//retrieve the received data into original format
int message_type_slide_received_final = (int)message_type_slide_received[0]; //then convert all sbyte array's bytes to int
int slideID_data_received = BitConverter.ToInt16(slideID_slide_received, 0); //then convert all sbyte array's bytes to int
updateUI("Received: " + Encoding.ASCII.GetString(slide_data_message_received));
///////////SLIDE DATA MESSAGE TO BE RECEIVED (END)////////////
}
}
catch (IOException exception)
{
updateUI("Client has disconnected");
}
}
问题出现在这里：
mStream.Write(slide_data_message_sent, 0, slide_data_message_sent.Length);
一旦发送此数据包，它就会捕获异常，客户端会断开连接。因此，第二次将数据放入写入流时会出现问题。有人可以帮帮我吗？