C#實現(xiàn)虛擬鍵盤的實例詳解
更新時間：2022年12月16日 10:00:17 作者：芝麻粒兒
這篇文章主要為大家詳細介紹了如何利用C#實現(xiàn)虛擬鍵盤，文中的示例代碼講解詳細，對我們學習C#有一定的幫助，感興趣的小伙伴可以跟隨小編一起了解一下
實踐過程
效果
代碼
public partial class Form1 : Form
{
private HookEx.UserActivityHook hook;//實例化HookEx.UserActivityHook
private static IDictionary<short, IList<FecitButton>> spacialVKButtonsMap;//表示鍵/值對應的泛型集合
private static IDictionary<short, IList<FecitButton>> combinationVKButtonsMap;//表示鍵/值對應的泛型集合
public Form1()
{
InitializeComponent();
#region 將指定的按鈕值添加到鍵類型中
spacialVKButtonsMap = new Dictionary<short, IList<FecitButton>>();
combinationVKButtonsMap = new Dictionary<short, IList<FecitButton>>();
IList<FecitButton> buttonList = new List<FecitButton>();//實例化IList<FecitButton>(按照索引單獨訪問的一組對象)
buttonList.Add(this.btnLCTRL);//添加左面的CTRL鍵
combinationVKButtonsMap.Add(KeyboardConstaint.VK_CONTROL, buttonList);//添加左面的CTRL鍵值
buttonList = new List<FecitButton>();
buttonList.Add(this.btnLSHFT);//添加左面的LSHFT鍵
buttonList.Add(this.btnRSHFT);//添加右面的LSHFT鍵
combinationVKButtonsMap.Add(KeyboardConstaint.VK_SHIFT, buttonList);//添加LSHFT鍵值
buttonList = new List<FecitButton>();//實例化IList<FecitButton>
buttonList.Add(this.btnLALT);//添加左面的ALT鍵
combinationVKButtonsMap.Add(KeyboardConstaint.VK_MENU, buttonList);//添加左面的ALT鍵值
buttonList = new List<FecitButton>();//實例化IList<FecitButton>
buttonList.Add(this.btnLW);//添加左面的WIN鍵
combinationVKButtonsMap.Add(KeyboardConstaint.VK_LWIN, buttonList);//添加左面的WIN鍵值
buttonList = new List<FecitButton>();//實例化IList<FecitButton>
buttonList.Add(this.btnLOCK);//添加LOCK鍵
spacialVKButtonsMap.Add(KeyboardConstaint.VK_CAPITAL, buttonList);//添加LOCK鍵值
#endregion
foreach (Control ctrl in this.Controls)
{
FecitButton button = ctrl as FecitButton;
if (button == null)
{
continue;
}
#region 設置按鍵的消息值
short key = 0;//記錄鍵值
bool isSpacialKey = true;
//記錄快捷鍵的鍵值
switch (button.Name)//獲取鍵名稱
{
case "btnLCTRL"://CTRL鍵的左鍵名稱
case "btnRCTRL"://CTRL鍵的右鍵名稱
key = KeyboardConstaint.VK_CONTROL;//獲取CTRL鍵的鍵值
break;
case "btnLSHFT"://SHFT鍵的左鍵名稱
case "btnRSHFT"://SHFT鍵的左鍵名稱
key = KeyboardConstaint.VK_SHIFT;//獲取SHFT鍵的鍵值
break;
case "btnLALT"://ALT鍵的左鍵名稱
case "btnRALT"://ALT鍵的左鍵名稱
key = KeyboardConstaint.VK_MENU;//獲取ALT鍵的鍵值
break;
case "btnLW"://WIN鍵的左鍵名稱
case "btnRW"://WIN鍵的左鍵名稱
key = KeyboardConstaint.VK_LWIN;//獲取WIN鍵的鍵值
break;
case "btnESC"://ESC鍵的名稱
key = KeyboardConstaint.VK_ESCAPE;//獲取ESC鍵的鍵值
break;
case "btnTAB"://TAB鍵的名稱
key = KeyboardConstaint.VK_TAB;//獲取TAB鍵的鍵值
break;
case "btnF1"://F1鍵的名稱
key = KeyboardConstaint.VK_F1;//獲取F1鍵的鍵值
break;
case "btnF2":
key = KeyboardConstaint.VK_F2;
break;
case "btnF3":
key = KeyboardConstaint.VK_F3;
break;
case "btnF4":
key = KeyboardConstaint.VK_F4;
break;
case "btnF5":
key = KeyboardConstaint.VK_F5;
break;
case "btnF6":
key = KeyboardConstaint.VK_F6;
break;
case "btnF7":
key = KeyboardConstaint.VK_F7;
break;
case "btnF8":
key = KeyboardConstaint.VK_F8;
break;
case "btnF9":
key = KeyboardConstaint.VK_F9;
break;
case "btnF10":
key = KeyboardConstaint.VK_F10;
break;
case "btnF11":
key = KeyboardConstaint.VK_F11;
break;
case "btnF12":
key = KeyboardConstaint.VK_F12;
break;
case "btnENT":
case "btnNUMENT":
key = KeyboardConstaint.VK_RETURN;
break;
case "btnWave":
key = KeyboardConstaint.VK_OEM_3;
break;
case "btnSem":
key = KeyboardConstaint.VK_OEM_1;
break;
case "btnQute":
key = KeyboardConstaint.VK_OEM_7;
break;
case "btnSpace":
key = KeyboardConstaint.VK_SPACE;
break;
case "btnBKSP":
key = KeyboardConstaint.VK_BACK;
break;
case "btnComma":
key = KeyboardConstaint.VK_OEM_COMMA;
break;
case "btnFullStop":
key = KeyboardConstaint.VK_OEM_PERIOD;
break;
case "btnLOCK":
key = KeyboardConstaint.VK_CAPITAL;
break;
case "btnMinus":
key = KeyboardConstaint.VK_OEM_MINUS;
break;
case "btnEqual":
key = KeyboardConstaint.VK_OEM_PLUS;
break;
case "btnLBracket":
key = KeyboardConstaint.VK_OEM_4;
break;
case "btnRBracket":
key = KeyboardConstaint.VK_OEM_6;
break;
case "btnPath":
key = KeyboardConstaint.VK_OEM_5;
break;
case "btnDivide":
key = KeyboardConstaint.VK_OEM_2;
break;
case "btnPSC":
key = KeyboardConstaint.VK_SNAPSHOT;
break;
case "btnINS"://Insert鍵的名稱
key = KeyboardConstaint.VK_INSERT;//獲取Insert鍵的鍵值
break;
case "btnDEL"://Delete鍵的名稱
key = KeyboardConstaint.VK_DELETE;//獲取Delete鍵的鍵值
break;
default:
isSpacialKey = false;
break;
}
if (!isSpacialKey)
{
key = (short)button.Name[3];//獲取按鈕的鍵值
}
button.Tag = key;//在按鈕的Tag屬性中記錄相應的鍵值
#endregion
button.Click += ButtonOnClick;//重載按鈕的單擊事件
}
this.hook = new HookEx.UserActivityHook(true, true);
HookEvents();
}
private void HookEvents()
{
this.hook.KeyDown += HookOnGlobalKeyDown;//重載hook類中的自定義事件KeyDown
this.hook.KeyUp += HookOnGlobalKeyUp;//重載hook類中的自定義事件KeyUp
this.hook.MouseActivity += HookOnMouseActivity;//重載hook類中的自定義事件MouseActivity
}
private void ButtonOnClick(object sender, EventArgs e)//按鍵的單擊事件
{
FecitButton btnKey = sender as FecitButton;//獲取當前按鍵的信息
if (btnKey == null)//如果按鍵為空值
return;
SendKeyCommand(btnKey);//發(fā)送按鍵的信息
}
/// <summary>
/// 接收并發(fā)送按鍵信息
/// </summary>
/// <param keyButton="FecitButton">按鍵信息</param>
private void SendKeyCommand(FecitButton keyButton)
{
short key = Convert.ToInt16(keyButton.Tag.ToString());//獲取當前鍵的鍵值
if (combinationVKButtonsMap.ContainsKey(key))//如果鍵值在鍵值列表中
{
if (keyButton.Checked)//如果按鈕處于按下狀態(tài)
{
SendKeyUp(key);//對按鈕進行抬起操作
}
else
{
SendKeyDown(key);//對按鈕進行按下操作
}
}
else
{
//執(zhí)行按鈕按下和抬起的操作
SendKeyDown(key);
SendKeyUp(key);
}
}
/// <summary>
/// 記錄鍵盤的按下操作的值
/// </summary>
/// <param key="short">鍵值</param>
private void SendKeyDown(short key)
{
Input[] input = new Input[1];//實例化Input[]
input[0].type = INPUT.KEYBOARD;//記錄當有鍵值的類型
input[0].ki.wVk = key;//記錄當前鍵值
input[0].ki.time = NativeMethods.GetTickCount();//獲取自windows啟動以來經(jīng)歷的時間長度（毫秒）
//消息的輸入
if (NativeMethods.SendInput((uint)input.Length, input, Marshal.SizeOf(input[0])) < input.Length)
{
throw new Win32Exception(Marshal.GetLastWin32Error());//指定錯誤的初始化
}
}
/// <summary>
/// 記錄鍵盤抬起操作的值
/// </summary>
/// <param key="short">鍵值</param>
private void SendKeyUp(short key)
{
Input[] input = new Input[1];//實例化Input[]
input[0].type = INPUT.KEYBOARD;//記錄當有鍵值的類型
input[0].ki.wVk = key;//記錄當前鍵值
input[0].ki.dwFlags = KeyboardConstaint.KEYEVENTF_KEYUP;
input[0].ki.time = NativeMethods.GetTickCount();//獲取自windows啟動以來經(jīng)歷的時間長度（毫秒）
//消息的輸入
if (NativeMethods.SendInput((uint)input.Length, input, Marshal.SizeOf(input[0])) < input.Length)
{
throw new Win32Exception(Marshal.GetLastWin32Error());//指定錯誤的初始化
}
}
//鍵盤的按下事件
private void HookOnGlobalKeyDown(object sender, HookEx.KeyExEventArgs e)
{
SetButtonStatus(e, true);
}
//鍵盤的抬起事件
private void HookOnGlobalKeyUp(object sender, HookEx.KeyExEventArgs e)
{
SetButtonStatus(e, false);
}
/// <summary>
/// 設置當前按鈕的狀態(tài)
/// </summary>
/// <param args="KeyExEventArgs">鍵信息</param>
/// <param isDown="bool">標識，當前鍵是否按下</param>
private void SetButtonStatus(HookEx.KeyExEventArgs args, bool isDown)
{
IList<FecitButton> buttonList = FindButtonList(args);//查找當有鍵
if (buttonList.Count <= 0)//如果沒有找到
return;//退出本次操作
short key = (short)args.KeyValue;//獲取當前鍵的鍵值
if (spacialVKButtonsMap.ContainsKey(key))//如果鍵/值列表中有該鍵
{
if (!isDown)//如果按鈕沒有被按下
{
FecitButton button = spacialVKButtonsMap[key][0];//設置按鈕的信息
button.Checked = !button.Checked;//設置當前按鈕為按下狀態(tài)
}
}
else
{
foreach (FecitButton button in buttonList)//遍歷IList中的所有按鈕
{
if (button == null)//如果按鈕為空
break;//退出循環(huán)
button.Checked = isDown;//設置按鈕的狀態(tài)
}
}
}
/// <summary>
/// 鼠標事件
/// </summary>
/// <param sener="object">鼠標對象</param>
/// <param e="MouseExEventArgs">為MouseUp、MouseDown和MouseMove事件提供數(shù)據(jù)</param>
private void HookOnMouseActivity(object sener, HookEx.MouseExEventArgs e)
{
Point location = e.Location;//獲取鼠標的位置
if (e.Button == MouseButtons.Left)//如果是鼠標左鍵
{
Rectangle captionRect = new Rectangle(this.Location, new Size(this.Width, SystemInformation.CaptionHeight));//獲取窗體的所在區(qū)域
if (captionRect.Contains(location))//如果鼠標在該窗體范圍內
{ //設置窗體的擴展樣式
NativeMethods.SetWindowLong(this.Handle, KeyboardConstaint.GWL_EXSTYLE, (int)NativeMethods.GetWindowLong(this.Handle, KeyboardConstaint.GWL_EXSTYLE) & (~KeyboardConstaint.WS_DISABLED));
//將消息發(fā)送給指定窗體
NativeMethods.SendMessage(this.Handle, KeyboardConstaint.WM_SETFOCUS, IntPtr.Zero, IntPtr.Zero);
}
else
{
//設置窗體的擴展樣式
NativeMethods.SetWindowLong(this.Handle, KeyboardConstaint.GWL_EXSTYLE, (int)NativeMethods.GetWindowLong(this.Handle, KeyboardConstaint.GWL_EXSTYLE) | KeyboardConstaint.WS_DISABLED);
}
}
}
/// <summary>
/// 在鍵列表中查找鍵值
/// </summary>
/// <param args="KeyExEventArgs">鍵信息</param>
private IList<FecitButton> FindButtonList(HookEx.KeyExEventArgs args)
{
short key = (short)args.KeyValue;//獲取鍵值
if (key == KeyboardConstaint.VK_LCONTROL || key == KeyboardConstaint.VK_RCONTROL)//如果是CTRL鍵
{
key = KeyboardConstaint.VK_CONTROL;//記錄CTRL鍵值
}
else if (key == KeyboardConstaint.VK_LSHIFT || key == KeyboardConstaint.VK_RSHIFT)//如果是SHIFT鍵
{
key = KeyboardConstaint.VK_SHIFT;//記錄SHIFT鍵值
}
else if (key == KeyboardConstaint.VK_LMENU || key == KeyboardConstaint.VK_RMENU)//如果是ALT鍵
{
key = KeyboardConstaint.VK_MENU;//記錄ALT鍵值
}
else if (key == KeyboardConstaint.VK_RWIN)//如果是WIN鍵
{
key = KeyboardConstaint.VK_LWIN;//記錄WIN鍵值
}
if (combinationVKButtonsMap.ContainsKey(key))//如果在IDictionary的集合中
{
return combinationVKButtonsMap[key];//返回當前鍵的鍵值
}
IList<FecitButton> buttonList = new List<FecitButton>();//實例化IList<FecitButton>
foreach (Control ctrl in this.Controls)//遍歷當前窗體中的所有控件
{
FecitButton button = ctrl as FecitButton;//如果當前控件是FecitButton按鈕
if (button == null)//如果當前按鈕為空
continue;//重新循環(huán)
short theKey = Convert.ToInt16(button.Tag.ToString());//獲取當前按鈕的鍵值
if (theKey == key)//如果與當前操作的按鈕相同
{
buttonList.Add(button);//添加當前操作的按鍵信息
break;
}
}
return buttonList;
}
}
public partial class FecitButton : Button
{
public FecitButton()
{
InitializeComponent();
base.Font = new Font("宋體", 9.75F, FontStyle.Bold);
base.Width = 26;
base.Height = 25;
}
private Color Color_Brush = Color.MediumPurple;
private Color Color_Pen = Color.Indigo;
public static bool MouseE = false;
private bool TChecked = false;
[Browsable(true), Category("按鈕操作"), Description("設置按鈕是否被按下，如按下，則為true")]
public bool Checked
{
get { return TChecked; }
set
{
TChecked = value;
Invalidate();
}
}
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
Color tem_colorb = Color_Brush;
Color tem_colorp = Color_Pen;
if (Checked)
{
Color_Brush = Color.Pink;
Color_Pen = Color.PaleVioletRed;
}
else
{
Color_Brush = tem_colorb;
Color_Pen = tem_colorp;
}
SolidBrush tem_Brush = new SolidBrush(Color_Brush);
Pen tem_Pen = new Pen(new SolidBrush(Color_Pen), 2);
e.Graphics.FillRectangle(tem_Brush, 0, 0, this.Width, this.Height);
e.Graphics.DrawRectangle(tem_Pen, 1, 1, this.Width - 2, this.Height - 2);
ProtractText(e.Graphics);
}
/// <summary>
/// 鼠標移入控件的可見區(qū)域時觸發(fā)
/// </summary>
protected override void OnMouseEnter(EventArgs e)
{
Color_Brush = Color.LightSteelBlue;
Color_Pen = Color.LightSlateGray;
Invalidate();
base.OnMouseEnter(e);
}
/// <summary>
/// 鼠標移出控件的可見區(qū)域時觸發(fā)
/// </summary>
protected override void OnMouseLeave(EventArgs e)
{
Color_Brush = Color.MediumPurple;
Color_Pen = Color.Indigo;
Invalidate();
base.OnMouseLeave(e);
}
private void ProtractText(Graphics g)
{
Graphics TitG = this.CreateGraphics();//創(chuàng)建Graphics類對象
string TitS = base.Text;//獲取圖表標題的名稱
SizeF TitSize = TitG.MeasureString(TitS, this.Font);//將繪制的字符串進行格式化
float TitWidth = TitSize.Width;//獲取字符串的寬度
float TitHeight = TitSize.Height;//獲取字符串的高度
float TitX = 0;//標題的橫向坐標
float TitY = 0;//標題的縱向坐標
if (this.Height > TitHeight)
TitY = (this.Height - TitHeight) / 2F;
else
TitY = 1;
if (this.Width > TitWidth)
TitX = (this.Width - TitWidth) / 2F;
else
TitX = 2;
Rectangle rect = new Rectangle((int)Math.Floor(TitX), (int)Math.Floor(TitY), (int)Math.Ceiling(TitWidth), (int)Math.Ceiling(TitHeight));
g.DrawString(TitS, base.Font,new SolidBrush(base.ForeColor), new PointF(TitX, TitY));
}
}
internal static class KeyboardConstaint
{
internal static readonly short VK_F1 = 0x70;
internal static readonly short VK_F2 = 0x71;
internal static readonly short VK_F3 = 0x72;
internal static readonly short VK_F4 = 0x73;
internal static readonly short VK_F5 = 0x74;
internal static readonly short VK_F6 = 0x75;
internal static readonly short VK_F7 = 0x76;
internal static readonly short VK_F8 = 0x77;
internal static readonly short VK_F9 = 0x78;
internal static readonly short VK_F10 = 0x79;
internal static readonly short VK_F11 = 0x7A;
internal static readonly short VK_F12 = 0x7B;
internal static readonly short VK_LEFT = 0x25;
internal static readonly short VK_UP = 0x26;
internal static readonly short VK_RIGHT = 0x27;
internal static readonly short VK_DOWN = 0x28;
internal static readonly short VK_NONE = 0x00;
internal static readonly short VK_ESCAPE = 0x1B;
internal static readonly short VK_EXECUTE = 0x2B;
internal static readonly short VK_CANCEL = 0x03;
internal static readonly short VK_RETURN = 0x0D;
internal static readonly short VK_ACCEPT = 0x1E;
internal static readonly short VK_BACK = 0x08;
internal static readonly short VK_TAB = 0x09;
internal static readonly short VK_DELETE = 0x2E;
internal static readonly short VK_CAPITAL = 0x14;
internal static readonly short VK_NUMLOCK = 0x90;
internal static readonly short VK_SPACE = 0x20;
internal static readonly short VK_DECIMAL = 0x6E;
internal static readonly short VK_SUBTRACT = 0x6D;
internal static readonly short VK_ADD = 0x6B;
internal static readonly short VK_DIVIDE = 0x6F;
internal static readonly short VK_MULTIPLY = 0x6A;
internal static readonly short VK_INSERT = 0x2D;
internal static readonly short VK_OEM_1 = 0xBA; // ';:' for US
internal static readonly short VK_OEM_PLUS = 0xBB; // '+' any country
internal static readonly short VK_OEM_MINUS = 0xBD; // '-' any country
internal static readonly short VK_OEM_2 = 0xBF; // '/?' for US
internal static readonly short VK_OEM_3 = 0xC0; // '`~' for US
internal static readonly short VK_OEM_4 = 0xDB; // '[{' for US
internal static readonly short VK_OEM_5 = 0xDC; // '\|' for US
internal static readonly short VK_OEM_6 = 0xDD; // ']}' for US
internal static readonly short VK_OEM_7 = 0xDE; // ''"' for US
internal static readonly short VK_OEM_PERIOD = 0xBE; // '.>' any country
internal static readonly short VK_OEM_COMMA = 0xBC; // ',<' any country
internal static readonly short VK_SHIFT = 0x10;
internal static readonly short VK_CONTROL = 0x11;
internal static readonly short VK_MENU = 0x12;
internal static readonly short VK_LWIN = 0x5B;
internal static readonly short VK_RWIN = 0x5C;
internal static readonly short VK_APPS = 0x5D;
internal static readonly short VK_LSHIFT = 0xA0;
internal static readonly short VK_RSHIFT = 0xA1;
internal static readonly short VK_LCONTROL = 0xA2;
internal static readonly short VK_RCONTROL = 0xA3;
internal static readonly short VK_LMENU = 0xA4;
internal static readonly short VK_RMENU = 0xA5;
internal static readonly short VK_SNAPSHOT = 0x2C;
internal static readonly short VK_SCROLL = 0x91;
internal static readonly short VK_PAUSE = 0x13;
internal static readonly short VK_HOME = 0x24;
internal static readonly short VK_NEXT = 0x22;
internal static readonly short VK_PRIOR = 0x21;
internal static readonly short VK_END = 0x23;
internal static readonly short VK_NUMPAD0 = 0x60;
internal static readonly short VK_NUMPAD1 = 0x61;
internal static readonly short VK_NUMPAD2 = 0x62;
internal static readonly short VK_NUMPAD3 = 0x63;
internal static readonly short VK_NUMPAD4 = 0x64;
internal static readonly short VK_NUMPAD5 = 0x65;
internal static readonly short VK_NUMPAD5NOTHING = 0x0C;
internal static readonly short VK_NUMPAD6 = 0x66;
internal static readonly short VK_NUMPAD7 = 0x67;
internal static readonly short VK_NUMPAD8 = 0x68;
internal static readonly short VK_NUMPAD9 = 0x69;
internal static readonly short KEYEVENTF_EXTENDEDKEY = 0x0001;
internal static readonly short KEYEVENTF_KEYUP = 0x0002;
internal static readonly int GWL_EXSTYLE = -20;
internal static readonly int WS_DISABLED = 0X8000000;
internal static readonly int WM_SETFOCUS = 0X0007;
}
[StructLayout(LayoutKind.Sequential)]
internal struct MOUSEINPUT
{
public int dx;
public int dy;
public int mouseData;
public int dwFlags;
public int time;
public IntPtr dwExtraInfo;
}
[StructLayout(LayoutKind.Sequential)]
internal struct KEYBDINPUT
{
public short wVk;
public short wScan;
public int dwFlags;
public int time;
public IntPtr dwExtraInfo;
}
[StructLayout(LayoutKind.Explicit)]
internal struct Input
{
[FieldOffset(0)]
public int type;
[FieldOffset(4)]
public MOUSEINPUT mi;
[FieldOffset(4)]
public KEYBDINPUT ki;
[FieldOffset(4)]
public HARDWAREINPUT hi;
}
[StructLayout(LayoutKind.Sequential)]
internal struct HARDWAREINPUT
{
public int uMsg;
public short wParamL;
public short wParamH;
}
internal class INPUT
{
public const int MOUSE = 0;
public const int KEYBOARD = 1;
public const int HARDWARE = 2;
}
internal static class NativeMethods
{
[DllImport("User32.dll", CharSet = CharSet.Auto, SetLastError = false)]
internal static extern IntPtr GetWindowLong(IntPtr hWnd, int nIndex);
[DllImport("User32.dll", CharSet = CharSet.Auto, SetLastError = false)]
internal static extern IntPtr SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
[DllImport("User32.dll", EntryPoint = "SendInput", CharSet = CharSet.Auto)]
internal static extern UInt32 SendInput(UInt32 nInputs, Input[] pInputs, Int32 cbSize);
[DllImport("Kernel32.dll", EntryPoint = "GetTickCount", CharSet = CharSet.Auto)]
internal static extern int GetTickCount();
[DllImport("User32.dll", EntryPoint = "GetKeyState", CharSet = CharSet.Auto)]
internal static extern short GetKeyState(int nVirtKey);
[DllImport("User32.dll", EntryPoint = "SendMessage", CharSet = CharSet.Auto)]
internal static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);
}
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