/// <summary>
/// Function to send data to the client.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonSendMessage_Click(object sender, EventArgs e)
{
const string NULLDATAERRORMESSAGE = "Field cannot be left empty";
//If there is no message to send, display an error message in the ErrorProvider
ClassLibrary.CheckTextBoxNotNull(TextBoxTypeMessage, ErrorProvider);
if (ErrorProvider.GetError(TextBoxTypeMessage) == NULLDATAERRORMESSAGE)
{
return;
}
//Encrypt the message and transmit it
string encryptedMessage = ClassLibrary.SymmetricEncryptDecrypt(TextBoxTypeMessage.Text, symmetricKey);
byte[] bt = Encoding.UTF8.GetBytes(encryptedMessage);
try
{
connectedClient.Client.Send(bt);
}
catch (Exception ex)
{
MyMessageBox.ShowMessage(ex.ToString());
return;
}
//Display the text in the list box
ListBoxChat.Items.Add(staffMember.StaffFirstName + ": " + TextBoxTypeMessage.Text + Environment.NewLine);
TextBoxTypeMessage.Clear();
}
private void ButtonSendMessage_Click(object sender, EventArgs e)
{
const string NULLDATAERRORMESSAGE = "Field cannot be left empty";
ClassLibrary.CheckTextBoxNotNull(TextBoxTypeMessage, ErrorProvider);
//As long as the user has some sort of input in the textbox, the message will send
if (ErrorProvider.GetError(TextBoxTypeMessage) == NULLDATAERRORMESSAGE)
{
return;
}
//Encrypt the message
string encryptedMessage = ClassLibrary.SymmetricEncryptDecrypt(TextBoxTypeMessage.Text, symmetricKey);
//Encode the message and send it
serverStream.Write(Encoding.UTF8.GetBytes(encryptedMessage), 0, Encoding.UTF8.GetByteCount(encryptedMessage));
serverStream.Flush();
//Display the message to the rich text box
sbSend.Clear();
sbSend.Append(student.StudentFirstName);
sbSend.Append(": ");
sbSend.Append(TextBoxTypeMessage.Text);
sbSend.Append(Environment.NewLine);
RichTextBoxChatWindow.SelectionColor = Color.Blue;
RichTextBoxChatWindow.AppendText(sbSend.ToString());
TextBoxTypeMessage.Clear();
}
