// Event - Send Message - Click - Asynchronously send message to all the users in collection
async private void UI_btn_SendMessage_Click(object sender, EventArgs e)
{
// Checking if textbox is emtpy or in placeholder state
if (UI_tb_MessageOut.Text.Length == 0 || UI_tb_MessageOut.ForeColor == Color.Gray)
{
return;
}
// Grabbing input
string username = "";
string message = UI_tb_MessageOut.Text;
// Check if a username is to be embedded in message
if (UI_tb_Username.Text.Length != 0 && UI_tb_Username.ForeColor != Color.Gray)
{
username = $"<{UI_tb_Username.Text}> ";
}
// Converting package into byte array to send out
byte[] messageOut = Encoding.Unicode.GetBytes(username + message);
// Asynchronously send message to all the users in collection
await Task.Run(() =>
{
// Itterate through user collection and grab IP addresses
(from i in users select new { i.Key }).ToList().ForEach(x =>
{
try
{
// Sending message to isolated IP address
Task <int> send = clientSocket.SendAsync(messageOut, messageOut.Length, x.Key, 1666);
Console.WriteLine($"Bytes Sent: {send.Result}");
}
catch (Exception exception)
{
Console.WriteLine($"Invalid IP address at {users[x.Key]} : " + exception.Message.ToString());
}
});
});
// After sucessful send, clear message box and regain focus
UI_tb_MessageOut.Clear();
UI_tb_MessageOut.Focus();
}
// Event - Textbox - Enter - Changes textbox format state from placeholder
private void Textbox_Enter(object sender, EventArgs e)
{
TextBox t = (TextBox)sender;
// Depending on event sender, changing font color to black and clearing placeholder text
switch (t.Name)
{
case "UI_tb_Username":
{
if (UI_tb_Username.ForeColor == Color.Gray)
{
UI_tb_Username.Clear();
UI_tb_Username.ForeColor = Color.Black;
}
}
break;
case "UI_tb_MessageOut":
{
if (UI_tb_MessageOut.ForeColor == Color.Gray)
{
UI_tb_MessageOut.Clear();
UI_tb_MessageOut.ForeColor = Color.Black;
}
}
break;
case "UI_tb_IPAddress":
{
if (UI_tb_IPAddress.ForeColor == Color.Gray)
{
UI_tb_IPAddress.Clear();
UI_tb_IPAddress.ForeColor = Color.Black;
}
}
break;
}
}