List.ForEach -- dotnet framework

Kevin G
5/7/2006 12:03:09 PM

Hi. I'm trying to prepare an example on how to use List.ForEach.

using the regular ForEach, I can get what I want with the folllowing
code:

List<string> lAvailablePorts = new List<string>();
lAvailablePorts.AddRange(SerialPort.GetPortNames());

string sPortsAvailable = "";
foreach (string sPort in lAvailablePorts)
{
sPortsAvailable += " " + sPort;
}

this.LogThis("Ports Available: " + sPortsAvailable);

however, I think I can do it like this:

List<string> lAvailablePorts = new List<string>();
lAvailablePorts.AddRange(SerialPort.GetPortNames());

this.LogThis("Ports Available: " + lAvailablePorts.ForEach(What
Do I put Here?));

can anyone help me out with the syntax?

-K

Göran_Andersson
5/7/2006 9:40:04 PM

The delegate in the ForEach method doesn't have a return value, so you
still need a variable to collect them.

A StringBuilder is better than concatenating strings, unless you are
absolutely sure that the number or items are always very low, and even
then, a StringBuilder is quite convenient.

List<string> ports;
StringBuilder available;

ports = new List<string>();
ports.AddRange(SerialPort.GetPortNames());
available = new StringBuilder();
ports.ForEach(delegate(string port) { available.Append("
").Append(port); } );
this.LogThis("Ports Available: " + available.ToString());

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