Serial Port Complete - Latest Microcontroller projects

Managing Ports and Transfers in .NET

and closing the port, sending and receiving data, and storing port parameters

and other information about the port.

Applications that need to open multiple ports at the same time can create mul-

tiple instances of the class. Each instance of the class can use the common

shared members while also maintaining private fields, properties, methods, and

events that apply to a specific port.

Chapter 9 showed how to use the GetPortNames method to obtain an array of

all of the names of the COM ports in a system, A ComPorts class can imple-

ment a nameArray variable as a shared member:

 Friend Shared nameArray() As String

nameArray = SerialPort.GetPortNames

 internal static string[] nameArray;

nameArray = SerialPort.GetPortNames();

The class can enable accessing a specific COM port by defining a private vari-

able that holds a SerialPort object and a property with Friend scope (internal

scope in C#) that provides methods for setting and getting the object:

 Private m_SelectedPort As New SerialPort

Friend Property SelectedPort() As SerialPort

Get

Return m_SelectedPort

End Get

Set(ByVal value As SerialPort)

m_SelectedPort = value

End Set

End Property