C# 如何在MainPage.cs中运行此类?
我有一个关于我的实验板上的按钮的类,它连接到我的树莓皮3。在Raspberry Pi上,我有Windows 10 IoT核心,Visual Studio项目是一个通用的空白应用程序C# 如何在MainPage.cs中运行此类?,c#,visual-studio,class,private,public,C#,Visual Studio,Class,Private,Public,我有一个关于我的实验板上的按钮的类,它连接到我的树莓皮3。在Raspberry Pi上,我有Windows 10 IoT核心,Visual Studio项目是一个通用的空白应用程序 using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Windows.Devices.Gpio; namespace LCDS
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Windows.Devices.Gpio;
namespace LCDScherm
{
class ButtonMap
{
private const int btnLeft = 26;
private const int btnUp = 19;
private const int btnDown = 13;
private const int btnRight = 6;
private static GpioController _gpioController;
private GpioPin _btnLeft;
private GpioPin _btnUp;
private GpioPin _btnDown;
private GpioPin _btnRight;
private string word;
private StringBuilder sb = new StringBuilder();
private char[] wordsAndLetters = { ' ', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', ',', '.', '!', '?' };
private int i;
private ButtonMap()
{
_gpioController = GpioController.GetDefault();
if (_gpioController == null) { return; }
_btnLeft = _gpioController.OpenPin(btnLeft);
_btnLeft.SetDriveMode(GpioPinDriveMode.InputPullUp);
_btnLeft.DebounceTimeout = TimeSpan.FromMilliseconds(50);
_btnLeft.ValueChanged += btnLeftValueChanged;
_btnUp = _gpioController.OpenPin(btnUp);
_btnUp.SetDriveMode(GpioPinDriveMode.InputPullUp);
_btnUp.DebounceTimeout = TimeSpan.FromMilliseconds(50);
_btnUp.ValueChanged += btnUpValueChanged;
_btnDown = _gpioController.OpenPin(btnDown);
_btnDown.SetDriveMode(GpioPinDriveMode.InputPullUp);
_btnDown.DebounceTimeout = TimeSpan.FromMilliseconds(50);
_btnDown.ValueChanged += btnDownValueChanged;
_btnRight = _gpioController.OpenPin(btnRight);
_btnRight.SetDriveMode(GpioPinDriveMode.InputPullUp);
_btnRight.DebounceTimeout = TimeSpan.FromMilliseconds(50);
_btnRight.ValueChanged += btnRightValueChanged;
}
private void btnLeftValueChanged(GpioPin sender, GpioPinValueChangedEventArgs e)
{
if (e.Edge == GpioPinEdge.FallingEdge)
{
//go to previous letter
int lengthword = sb.Length;
sb.Remove(lengthword - 1, 1);
word = sb.ToString();
//tbOutput.Clear();
//tbOutput.Text = word;
}
}
private void btnUpValueChanged(GpioPin sender, GpioPinValueChangedEventArgs e)
{
if (e.Edge == GpioPinEdge.FallingEdge)
{
//We don't want the i to go above the array
if (i <= 39)
{
i = i + 1;
}
//output on lcd
//Output.Text = word + Convert.ToString(wordsAndLetters[i]);
}
}
private void btnDownValueChanged(GpioPin sender, GpioPinValueChangedEventArgs e)
{
if (e.Edge == GpioPinEdge.FallingEdge)
{
//We don't want the i to go below the array
if (i > 0)
{
i = i - 1;
}
//output on lcd
//tbOutput.Text = word + Convert.ToString(wordsAndLetters[i]);
}
}
private void btnRightValueChanged(GpioPin sender, GpioPinValueChangedEventArgs e)
{
if (e.Edge == GpioPinEdge.FallingEdge)
{
//go to next letter & if held for a certain amount of time sent the message
//tbOutput.Text = word;
sb.Append(wordsAndLetters[i]);
word = sb.ToString();
i = 0;
//tbOutput.Clear();
//tbOutput.Text = word;
}
}
}
}
我得到一个错误,该类由于其保护级别而无法访问。有什么快速解决方法吗?您需要将
ButtonMap
类的声明更改为public class ButtonMap{…}
而不仅仅是class ButtonMap{…}
,并且您需要将类的构造函数设置为public
而不是private
(即public ButtonMap(){…}
)。然后您应该能够实例化类的一个实例。您需要将ButtonMap
类的声明更改为public class ButtonMap{…}
而不仅仅是class ButtonMap{…}
,并且需要将类的构造函数设置为public而不是private
(即,public ButtonMap(){…}
)。然后您应该能够实例化类的实例
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409
namespace LCDScherm
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
LCD lcd;
public MainPage()
{
this.InitializeComponent();
Init();
Run();
}
private async void Init()
{
lcd = new LCD(16, 2);
await lcd.InitAsync(7, 8, 25, 24, 23, 18);
//await lcd.clearAsync();
}
public async void Run()
{
//await lcd.clearAsync();
lcd.setCursor(0, 0);
lcd.write("test");
lcd.setCursor(0, 1);
lcd.write("test");
}
}
}
ButtonMap btnMap = new ButtonMap();