/// <summary>
/// Update serialComCmBx items, and keep existing
/// ports at their current index in the list
/// </summary>
private void UpdateSerialPorts()
{
var t = Task.Run(delegate
{
// the following function is a blocking one, therefore must be
// called in a seperate thread so GUI won't freeze
connectedSerialPorts = SerialCom.GetConnectedPortsDetailedStrings();
});
if (connectedSerialPorts == null)
{
return;
}
// create a clone of serialComCmBx.Items to allow
// modifying serialComCmBx.Items while iterating
// over its elements
List <string> portsListClone = new List <string>();
foreach (string port in serialComCmBx.Items)
{
portsListClone.Add(port);
}
//remove disconnected ports from combobox
foreach (string port in portsListClone)
{
if (!connectedSerialPorts.Contains(port))
{
serialComCmBx.Items.Remove(port);
}
}
// add new connected ports the combobox
foreach (string port in connectedSerialPorts)
{
if (!serialComCmBx.Items.Contains(port))
{
serialComCmBx.Items.Add(port);
}
}
if (serialComCmBx.Items.Count > 0)
{
serialComCmBx.SelectedIndex = 0;
}
}