我买了1个电子琴做生日礼物。
卖琴的第一个月免费，以后每月30元。
所以我想自己弄一个。。
c#窗口接收按键
private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
if((Keys)e.KeyChar==Keys.Enter)
{
MessageBox.Show("enter");
}
}
请问大哥，怎么接收电子琴按键，感谢大佬，其他地方找的都是控制台。。
我把那个控制台程序复制出来新建成了窗口程序。调试时终于在输出窗口看到了信息。
它的输出方法是public void MidiProc(IntPtr hMidiIn,
uint wMsg,
IntPtr dwInstance,
UInt32 dwParam1,
UInt32 dwParam2)
我在里面添加了全局变量，用一个100的时钟去读取。加了个开关BBB。
这里有个问题就是同时按下10多个按键时钟应该会遗漏。是否应该改成队列。
或者另外 一个什么Proc。。让它自动显示出来，研究2周了，大哥来源码。。非常感谢！
得到的按键名称是为了，按着要做瀑布落下来同时比较4，5个按键了..
static uint midi_wMsg11;
static UInt32 midi_dw11;
static UInt32 mide_dw11;
static UInt32 dwParam11;
static UInt32 dwParam21;
static uint BBB = 0;
static uint ccc = 0;
新建了个窗口，一个时钟100显示到textbox1,
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace WindowsFormsApp1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public class InputPort
{
private NativeMethods.MidiInProc midiInProc;
private IntPtr handle;
public InputPort()
{
midiInProc = new NativeMethods.MidiInProc(MidiProc);
handle = IntPtr.Zero;
}
public static int InputCount
{
get { return NativeMethods.midiInGetNumDevs(); }
}
public bool Close()
{
bool result = NativeMethods.midiInClose(handle)
== NativeMethods.MMSYSERR_NOERROR;
handle = IntPtr.Zero;
return result;
}
public bool Open(int id)
{
return NativeMethods.midiInOpen(
out handle,
id,
midiInProc,
IntPtr.Zero,
NativeMethods.CALLBACK_FUNCTION)
== NativeMethods.MMSYSERR_NOERROR;
}
public bool Start()
{
return NativeMethods.midiInStart(handle)
== NativeMethods.MMSYSERR_NOERROR;
}
public bool Stop()
{
return NativeMethods.midiInStop(handle)
== NativeMethods.MMSYSERR_NOERROR;
}
public IntPtr hmidi = IntPtr.Zero;
public uint midi_wMsg = 0;
public IntPtr midi_dwIns = IntPtr.Zero;
public UInt32 midi_dw1 = 0;
public UInt32 mide_dw2 = 0;
public void MidiProc(IntPtr hMidiIn,
uint wMsg,
IntPtr dwInstance,
UInt32 dwParam1,
UInt32 dwParam2)
{
// Receive messages here
hmidi = hMidiIn;
if (wMsg == 963)
{
dwParam1 = dwParam1 & 0xFFFF;
uint h_dw1 = 0;
uint l_dw1 = 0;
h_dw1 = dwParam1 & 0xFF;
l_dw1 = (dwParam1 >> 8) & 0xFF;
Console.WriteLine(Convert.ToString(wMsg, 16));
Console.WriteLine(Convert.ToString(h_dw1, 16));
Console.WriteLine(Convert.ToString(l_dw1, 16));
Console.WriteLine(Convert.ToString(dwParam2, 16));
Console.WriteLine("-------------------------------");
midi_dw11 = h_dw1;
mide_dw11 = l_dw1;
}
else
{
Console.WriteLine(Convert.ToString(wMsg, 16));
Console.WriteLine(Convert.ToString(dwParam1, 16));
Console.WriteLine(Convert.ToString(dwParam2, 16));
Console.WriteLine("-------------------------------");
dwParam11 = dwParam1;
}
midi_wMsg11 = wMsg;
dwParam21 = dwParam2;
BBB = 1;
}
}
internal static class NativeMethods
{
internal const int MMSYSERR_NOERROR = 0;
internal const int CALLBACK_FUNCTION = 0x00030000;
internal delegate void MidiInProc(
IntPtr hMidiIn,
uint wMsg,
IntPtr dwInstance,
UInt32 dwParam1,
UInt32 dwParam2);
[DllImport("winmm.dll")]
internal static extern int midiInGetNumDevs();
[DllImport("winmm.dll")]
internal static extern int midiInClose(
IntPtr hMidiIn);
[DllImport("winmm.dll")]
internal static extern int midiInOpen(
out IntPtr lphMidiIn,
int uDeviceID,
MidiInProc dwCallback,
IntPtr dwCallbackInstance,
int dwFlags);
[DllImport("winmm.dll")]
internal static extern int midiInStart(
IntPtr hMidiIn);
[DllImport("winmm.dll")]
internal static extern int midiInStop(
IntPtr hMidiIn);
}
private void Form1_Load(object sender, EventArgs e)
{
}
static uint midi_wMsg11;
static UInt32 midi_dw11;
static UInt32 mide_dw11;
static UInt32 dwParam11;
static UInt32 dwParam21;
static uint BBB = 0;
static uint ccc = 0;
private void button1_Click(object sender, EventArgs e)
{
InputPort ip = new InputPort();
int i = InputPort.InputCount;
bool isOpen = false;
bool isStart = false;
isOpen = ip.Open(i - 1);
if (isOpen == true)
{
isStart = ip.Start();
}
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
if (BBB == 1)
{
BBB = 0;
if (ccc > 20) { textBox1.Text = ""; ccc = 0; }
textBox1.Text = textBox1.Text + System.Environment.NewLine + "midi_wMsg:" + Convert.ToString(midi_wMsg11, 16);
textBox1.Text = textBox1.Text + System.Environment.NewLine + "dwParam1:" + Convert.ToString(dwParam11, 16);
textBox1.Text = textBox1.Text + System.Environment.NewLine + "dwParam2:" + Convert.ToString(dwParam21, 16);
textBox1.SelectionStart = textBox1.Text.Length;
textBox1.ScrollToCaret();
ccc = ccc + 1;
}
}
}
}
