实现数据推送
在ModbusTcp模块中已经能够获取到正确的plc值，接下来做的就是如何让外部调用的程序获取到相关的数据，主要就是两种方法：通过对象属性进行共享；通过事件进行推送
方法一：通过类属性共享
在RegisterPoint类中增加public object Value { get; set; }value属性来存储当前实时值，外部调用程序直接读点位集合中对象的Value值。
public class RegisterPoint
{
public string UID {
get; set; }
public string Name {
get; set; }
/// <summary>
/// 数据类型
/// </summary>
public Type Type {
get; set; }
/// <summary>
/// 寄存器类型
/// </summary>
public string RegisterType {
get; set; }
public int Address {
get; set; }
public int Length {
get; set; }
/// <summary>
/// 当前值
/// </summary>
public object Value {
get; set; }
}
赋值
void DealData(RegisterPoint point, byte[] bytes)
{
//处理返回数据
var funcCode = ReadFuncCodes[point.RegisterType];
object value;
//...处理过程
//赋值
point.Value = value;
// Console.WriteLine($"Point:{point.UID}-->Value:{value}");
}
使用，在调用的地方获取Value值
while (true)
{
foreach (RegisterPoint point in points)
{
Console.WriteLine($"Point:{
point.UID}-->Value:{
point.Value}");
}
Thread.Sleep(1000);
}
方法二：事件通知
添加一个事件，参数为点位类型和值
public event Action<RegisterPoint, object> ValueUpdated;
在数据处理中调用，推送值
void DealData(RegisterPoint point, byte[] bytes)
{
//处理返回数据
var funcCode = ReadFuncCodes[point.RegisterType];
object value;
//...处理过程
//赋值
ValueUpdated?.Invoke(point, value);
// Console.WriteLine($"Point:{point.UID}-->Value:{value}");
}
在调用方，订阅事件使用
//Main
ModbusTcp modbusTcp = new ModbusTcp(deviceLink, points);
modbusTcp.DoMonitor();
modbusTcp.ValueUpdated += ModbusTcp_ValueUpdated;
//事件方法
private static void ModbusTcp_ValueUpdated(RegisterPoint point, object value)
{
Console.WriteLine($"Point:{
point.UID}-->Value:{
value}");
}
代码
Program.cs
internal class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello, World!");
DeviceLink deviceLink = new DeviceLink()
{
Ip = "127.0.0.1",
Port = 502,
SlaveID = 1
};
//Coil
//DiscreteInput
//HoldingRegister
//InputRegister
List<RegisterPoint> points = new List<RegisterPoint>();
points.Add(
new RegisterPoint()
{
UID = "001",
RegisterType = "HoldingRegister",
Address = 0,
Type = typeof(short),
Length = 1,
}
);
points.Add(
new RegisterPoint()
{
UID = "002",
RegisterType = "HoldingRegister",
Address = 1,
Type = typeof(ushort),
Length = 1,
}
);
points.Add(
new RegisterPoint()
{
UID = "003",
RegisterType = "HoldingRegister",
Address = 2,
Type = typeof(int),
Length = 2,
}
);
ModbusTcp modbusTcp = new ModbusTcp(deviceLink, points);
modbusTcp.DoMonitor();
modbusTcp.ValueUpdated += ModbusTcp_ValueUpdated;
//获取Value值
//while (true)
//{
// foreach (RegisterPoint point in points)
// {
// Console.WriteLine($"Point:{point.UID}-->Value:{point.Value}");
// }
// Thread.Sleep(1000);
//}
Console.ReadKey();
}
//事件推送
private static void ModbusTcp_ValueUpdated(RegisterPoint point, object value)
{
Console.WriteLine($"Point:{
point.UID}-->Value:{
value}");
}
}