背景
我正在编写一个程序，它收集不同的事件（按键，鼠标位置等）并将单个字符串发送到串行端口。 程序的一小部分，其中按下一个键，以控制移动（前进 - W键;左 - A键，前左 - WA键）。 当事件发生时，将调用一个方法，该方法在FinalStringClass类中获取数字字符串和进程。在主窗体上，有一个方法，它将收集的值分配给标签。 但是，由于缺乏编程经验，我遇到了代码问题：（
主要表格：
Serial port;
FinalStringClass fstr;
public Form1()
{
InitializeComponent();
//... Serial port settings
timer.Start();
fstr = new FinalStringClass(UpdateLabel2);
}
public void UpdateLabel2(string x, string y, string speed, string mvm) //
{
label2.Text = "x: " + x + "y: " + y + "speed: " + speed + "mvm: " + mvm;
}
private void timer_Tick(object sender, EventArgs e)
{
var up = KeyboardInfo.GetKeyState(Keys.W);
var down = KeyboardInfo.GetKeyState(Keys.S);
var left = KeyboardInfo.GetKeyState(Keys.A);
var right = KeyboardInfo.GetKeyState(Keys.D);
if (left.IsPressed)
{
if (up.IsPressed == true) // if W and A keys are pressed, ->
{
fstr.mvmMethod("7"); // this method is triggered
return;
}
if (down.IsPressed)
{
fstr.mvmMethod("9");
return;
}
if (right.IsPressed)
{
fstr.mvmMethod("1");
return;
}
fstr.mvmMethod("4"); //if W key is pressed, then this method is triggered
}
//... (other if condition statements)
label2.Text = fstr.FinalStringBuilder();
port.Write(fstr.FinalStringBuilder());
}
外部课程：
class FinalStringClass
{
private Action<string, string, string, string> updateLabel2;
Action<String> _x, _y, _speed, _mvm;
string xF, yF, speedF, mvmF;
public FinalStringClass(Action<string, string, string, string> updateLabel2)
{
this.updateLabel2 = updateLabel2;
}
public FinalStringClass(Action<String> x, Action<String> y, Action<String> speed, Action<String> mvm)
{
_x = x;
_y = y;
_speed = speed;
_mvm = mvm;
}
public void xMethod(string x)
{
_x(x);
xF = x;
}
public void yMethod(string y)
{
_y(y);
yF = y;
}
public void speedMethod(string speed)
{
_speed(speed);
speedF = speed;
}
public void mvmMethod(string mvm)
{
_mvm(mvm);
mvmF = mvm;
}
public string FinalStringBuilder()
{
return xF + yF + speedF + mvmF;
}
}
使用单个参数时，一切正常。但处理多个参数会导致问题：（
使用单个参数（完整工作代码）的示例：
主要表格
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO.Ports;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace FFApp
{
public partial class Form1 : Form
{
SerialPort port;
MyClass outside;
public Form1()
{
InitializeComponent();
timer.Start();
outside = new MyClass(UpdateLabel);
}
public void UpdateLabel(string str)
{
label1.Text = str;
}
private void init()
{
port = new SerialPort();
port.PortName = "COM1";
port.BaudRate = 115200;
try
{
port.Open();
}
catch (Exception e1)
{
MessageBox.Show(e1.Message);
}
}
public struct KeyStateInfo
{
private Keys key;
private bool isPressed;
private bool isToggled;
public KeyStateInfo(Keys key, bool ispressed, bool istoggled)
{
this.key = key;
isPressed = ispressed;
isToggled = istoggled;
}
public static KeyStateInfo Default
{
get
{
return new KeyStateInfo(Keys.None, false, false);
}
}
public Keys Key
{
get { return key; }
}
public bool IsPressed
{
get { return isPressed; }
}
public bool IsToggled
{
get { return isToggled; }
}
}
private void timer_Tick(object sender, EventArgs e)
{
var up = KeyboardInfo.GetKeyState(Keys.W);
var down = KeyboardInfo.GetKeyState(Keys.S);
var left = KeyboardInfo.GetKeyState(Keys.A);
var right = KeyboardInfo.GetKeyState(Keys.D);
Keyboard kb = new Keyboard();
if (left.IsPressed)
{
if (up.IsPressed == true)
{
outside.MyMethod("7");
return;
}
if (down.IsPressed)
{
outside.MyMethod("9");
return;
}
if (right.IsPressed)
{
outside.MyMethod("1");
return;
}
outside.MyMethod("4");
}
if (right.IsPressed)
{
if (up.IsPressed)
{
outside.MyMethod("6");
return;
}
if (down.IsPressed)
{
outside.MyMethod("8");
return;
}
if (left.IsPressed)
{
outside.MyMethod("1");
return;
}
outside.MyMethod("5");
}
if (up.IsPressed)
{
if (left.IsPressed)
{
outside.MyMethod("7");
return;
}
if (right.IsPressed)
{
outside.MyMethod("6");
return;
}
if (down.IsPressed)
{
outside.MyMethod("1");
return;
}
outside.MyMethod("2");
}
if (down.IsPressed)
{
if (left.IsPressed)
{
outside.MyMethod("9");
return;
}
if (right.IsPressed)
{
outside.MyMethod("8");
return;
}
if (up.IsPressed)
{
outside.MyMethod("9");
return;
}
outside.MyMethod("3");
}
if (!right.IsPressed && !left.IsPressed && !up.IsPressed && !down.IsPressed)
{
outside.MyMethod("1");
}
}
public class KeyboardInfo
{
[DllImport("user32")]
private static extern short GetKeyState(int vKey);
private KeyboardInfo()
{
}
public static KeyStateInfo GetKeyState(Keys key)
{
short keyState = GetKeyState((int)key);
int low = Low(keyState), high = High(keyState);
bool toggled = low == 1;
bool pressed = high == 1;
return new KeyStateInfo(key, pressed, toggled);
}
private static int High(int keyState)
{
return keyState > 0 ? keyState >> 0x10
: (keyState >> 0x10) & 0x1;
}
private static int Low(int keyState)
{
return keyState & 0xffff;
}
}
}
}
类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace FFApp
{
class MyClass
{
Action<String> labelSetter;
public MyClass(Action<String> labelSetter)
{
this.labelSetter = labelSetter;
}
public string MyProperty { get; set; }
public void MyMethod(string text)
{
labelSetter(text);
MyProperty = text;
}
}
}
或者是否可以在此代码中获取更改值（存储在变量中），当按下W / A / D / S / W + A / W + D等键时，为了允许构建最终字符串？例如：string finalstring = x + y + speed + pressed_key;