最近在开发一个串口终端软件，需要实现输入汉字，也就是类似于超级终端那样，输入一个汉字或一串汉字立马就发送到串口。
对于字母，很简单，监控按键就可以，如果是汉字，那就不行了。因为汉字是输入法输入的，文本控件不支持输入法输入产生事件。所以就需要另辟蹊径。
网上找了很久，始终没有找到好的方案，后来
参考了这篇博客点击打开链接
找到了思路，只不过楼主没有把问题完美解决。所以我在他的基础上彻底解决了问题
首先是如何得到输入法的结果
代码如下：
</pre><pre name="code" class="csharp">eGCS_RESULTSTR = 0x0800,
public class GetImeComposition
{
[DllImport("Imm32.dll")]
public static extern IntPtr ImmGetContext(IntPtr hWnd);
[DllImport("Imm32.dll")]
public static extern bool ImmReleaseContext(IntPtr hWnd, IntPtr hIMC);
[DllImport("Imm32.dll", CharSet = CharSet.Unicode)]
private static extern int ImmGetCompositionStringW(IntPtr hIMC, int dwIndex, byte[] lpBuf, int dwBufLen);
/*
* handle 需要处理的控件的句柄
* */
public string CurrentCompStr(IntPtr handle)
{
IntPtr hIMC = ImmGetContext(handle);
try
{
int strLen = ImmGetCompositionStringW(hIMC, (int)emImeGcs.eGCS_RESULTSTR, null, 0);
if (strLen > 0)
{
byte[] buffer = new byte[strLen];
ImmGetCompositionStringW(hIMC, (int)emImeGcs.eGCS_RESULTSTR, buffer, strLen);
return Encoding.Unicode.GetString(buffer);
}
else
{
return string.Empty;
}
}
finally
{
ImmReleaseContext(handle, hIMC);
}
}
}接着是自定义控件
不同的控件需要建立不同的类，这里我用了RichTextBox
public class CmdRichTextBox : RichTextBox
{
public delegate void PrecessImeStrCallBack(string str);
public PrecessImeStrCallBack ProcessIme = null;
private GetImeComposition getImeStr = new GetImeComposition();
string imeStr;
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
//判断系统消息的ID号
//case (int)emWinMsg.eWM_TIMECHANGE:
//case (int)emWinMsg.eWM_IME_STARTCOMPOSITION:
//case (int)emWinMsg.eWM_IME_ENDCOMPOSITION:
case (int)emWinMsg.eWM_IME_COMPOSITION:
//case (int)emWinMsg.eWM_IME_KEYLAST:
//case (int)emWinMsg.eWM_TIMER:
case (int)emWinMsg.eWM_IME_SETCONTEXT:
//case (int)emWinMsg.eWM_IME_NOTIFY:
//case (int)emWinMsg.eWM_IME_CONTROL:
//case (int)emWinMsg.eWM_IME_COMPOSITIONFULL:
//case (int)emWinMsg.eWM_IME_SELECT:
//case (int)emWinMsg.eWM_IME_CHAR:
//case (int)emWinMsg.eWM_IME_REQUEST:
//case (int)emWinMsg.eWM_IME_KEYDOWN:
//case (int)emWinMsg.eWM_IME_KEYUP:
break;
case (int)emWinMsg.eWM_IME_ENDCOMPOSITION:
imeStr = getImeStr.CurrentCompStr(this.Handle);
//Debug.WriteLine(imeStr);
if (ProcessIme != null)
{
ProcessIme(imeStr);
}
break;
default:
base.WndProc(ref m);
break;
}
}
}附上枚举值定义
public enum emWinMsg
{
eWM_NULL = 0x0000,
eWM_CREATE = 0x0001,
eWM_DESTROY = 0x0002,
eWM_MOVE = 0x0003,
eWM_SIZE = 0x0005,
eWM_ACTIVATE = 0x0006,
eWM_SETFOCUS = 0x0007,
eWM_KILLFOCUS = 0x0008,
eWM_ENABLE = 0x000A,
eWM_SETREDRAW = 0x000B,
eWM_SETTEXT = 0x000C,
eWM_GETTEXT = 0x000D,
eWM_GETTEXTLENGTH = 0x000E,
eWM_PAINT = 0x000F,
eWM_CLOSE = 0x0010,
eWM_QUERYENDSESSION = 0x0011,
eWM_QUIT = 0x0012,
eWM_QUERYOPEN = 0x0013,
eWM_ERASEBKGND = 0x0014,
eWM_SYSCOLORCHANGE = 0x0015,
eWM_ENDSESSION = 0x0016,
eWM_SHOWWINDOW = 0x0018,
eWM_CTLCOLOR = 0x0019,
eWM_WININICHANGE = 0x001A,
eWM_SETTINGCHANGE = 0x001A,
eWM_DEVMODECHANGE = 0x001B,
eWM_ACTIVATEAPP = 0x001C,
eWM_FONTCHANGE = 0x001D,
eWM_TIMECHANGE = 0x001E,
eWM_CANCELMODE = 0x001F,
eWM_SETCURSOR = 0x0020,
eWM_MOUSEACTIVATE = 0x0021,
eWM_CHILDACTIVATE = 0x0022,
eWM_QUEUESYNC = 0x0023,
eWM_GETMINMAXINFO = 0x0024,
eWM_PAINTICON = 0x0026,
eWM_ICONERASEBKGND = 0x0027,
eWM_NEXTDLGCTL = 0x0028,
eWM_SPOOLERSTATUS = 0x002A,
eWM_DRAWITEM = 0x002B,
eWM_MEASUREITEM = 0x002C,
eWM_DELETEITEM = 0x002D,
eWM_VKEYTOITEM = 0x002E,
eWM_CHARTOITEM = 0x002F,
eWM_SETFONT = 0x0030,
eWM_GETFONT = 0x0031,
eWM_SETHOTKEY = 0x0032,
eWM_GETHOTKEY = 0x0033,
eWM_QUERYDRAGICON = 0x0037,
eWM_COMPAREITEM = 0x0039,
eWM_GETOBJECT = 0x003D,
eWM_COMPACTING = 0x0041,
eWM_COMMNOTIFY = 0x0044,
eWM_WINDOWPOSCHANGING = 0x0046,
eWM_WINDOWPOSCHANGED = 0x0047,
eWM_POWER = 0x0048,
eWM_COPYDATA = 0x004A,
eWM_CANCELJOURNAL = 0x004B,
eWM_NOTIFY = 0x004E,
eWM_INPUTLANGCHANGEREQUEST = 0x0050,
eWM_INPUTLANGCHANGE = 0x0051,
eWM_TCARD = 0x0052,
eWM_HELP = 0x0053,
eWM_USERCHANGED = 0x0054,
eWM_NOTIFYFORMAT = 0x0055,
eWM_CONTEXTMENU = 0x007B,
eWM_STYLECHANGING = 0x007C,
eWM_STYLECHANGED = 0x007D,
eWM_DISPLAYCHANGE = 0x007E,
eWM_GETICON = 0x007F,
eWM_SETICON = 0x0080,
eWM_NCCREATE = 0x0081,
eWM_NCDESTROY = 0x0082,
eWM_NCCALCSIZE = 0x0083,
eWM_NCHITTEST = 0x0084,
eWM_NCPAINT = 0x0085,
eWM_NCACTIVATE = 0x0086,
eWM_GETDLGCODE = 0x0087,
eWM_SYNCPAINT = 0x0088,
eWM_NCMOUSEMOVE = 0x00A0,
eWM_NCLBUTTONDOWN = 0x00A1,
eWM_NCLBUTTONUP = 0x00A2,
eWM_NCLBUTTONDBLCLK = 0x00A3,
eWM_NCRBUTTONDOWN = 0x00A4,
eWM_NCRBUTTONUP = 0x00A5,
eWM_NCRBUTTONDBLCLK = 0x00A6,
eWM_NCMBUTTONDOWN = 0x00A7,
eWM_NCMBUTTONUP = 0x00A8,
eWM_NCMBUTTONDBLCLK = 0x00A9,
eWM_KEYDOWN = 0x0100,
eWM_KEYUP = 0x0101,
eWM_CHAR = 0x0102,
eWM_DEADCHAR = 0x0103,
eWM_SYSKEYDOWN = 0x0104,
eWM_SYSKEYUP = 0x0105,
eWM_SYSCHAR = 0x0106,
eWM_SYSDEADCHAR = 0x0107,
eWM_KEYLAST = 0x0108,
eWM_IME_STARTCOMPOSITION = 0x010D,
eWM_IME_ENDCOMPOSITION = 0x010E,
eWM_IME_COMPOSITION = 0x010F,
eWM_IME_KEYLAST = 0x010F,
eWM_INITDIALOG = 0x0110,
eWM_COMMAND = 0x0111,
eWM_SYSCOMMAND = 0x0112,
eWM_TIMER = 0x0113,
eWM_HSCROLL = 0x0114,
eWM_VSCROLL = 0x0115,
eWM_INITMENU = 0x0116,
eWM_INITMENUPOPUP = 0x0117,
eWM_MENUSELECT = 0x011F,
eWM_MENUCHAR = 0x0120,
eWM_ENTERIDLE = 0x0121,
eWM_MENURBUTTONUP = 0x0122,
eWM_MENUDRAG = 0x0123,
eWM_MENUGETOBJECT = 0x0124,
eWM_UNINITMENUPOPUP = 0x0125,
eWM_MENUCOMMAND = 0x0126,
eWM_CTLCOLORWinMsgBOX = 0x0132,
eWM_CTLCOLOREDIT = 0x0133,
eWM_CTLCOLORLISTBOX = 0x0134,
eWM_CTLCOLORBTN = 0x0135,
eWM_CTLCOLORDLG = 0x0136,
eWM_CTLCOLORSCROLLBAR = 0x0137,
eWM_CTLCOLORSTATIC = 0x0138,
eWM_MOUSEMOVE = 0x0200,
eWM_LBUTTONDOWN = 0x0201,
eWM_LBUTTONUP = 0x0202,
eWM_LBUTTONDBLCLK = 0x0203,
eWM_RBUTTONDOWN = 0x0204,
eWM_RBUTTONUP = 0x0205,
eWM_RBUTTONDBLCLK = 0x0206,
eWM_MBUTTONDOWN = 0x0207,
eWM_MBUTTONUP = 0x0208,
eWM_MBUTTONDBLCLK = 0x0209,
eWM_MOUSEWHEEL = 0x020A,
eWM_PARENTNOTIFY = 0x0210,
eWM_ENTERMENULOOP = 0x0211,
eWM_EXITMENULOOP = 0x0212,
eWM_NEXTMENU = 0x0213,
eWM_SIZING = 0x0214,
eWM_CAPTURECHANGED = 0x0215,
eWM_MOVING = 0x0216,
eWM_DEVICECHANGE = 0x0219,
eWM_MDICREATE = 0x0220,
eWM_MDIDESTROY = 0x0221,
eWM_MDIACTIVATE = 0x0222,
eWM_MDIRESTORE = 0x0223,
eWM_MDINEXT = 0x0224,
eWM_MDIMAXIMIZE = 0x0225,
eWM_MDITILE = 0x0226,
eWM_MDICASCADE = 0x0227,
eWM_MDIICONARRANGE = 0x0228,
eWM_MDIGETACTIVE = 0x0229,
eWM_MDISETMENU = 0x0230,
eWM_ENTERSIZEMOVE = 0x0231,
eWM_EXITSIZEMOVE = 0x0232,
eWM_DROPFILES = 0x0233,
eWM_MDIREFRESHMENU = 0x0234,
eWM_IME_SETCONTEXT = 0x0281,
eWM_IME_NOTIFY = 0x0282,
eWM_IME_CONTROL = 0x0283,
eWM_IME_COMPOSITIONFULL = 0x0284,
eWM_IME_SELECT = 0x0285,
eWM_IME_CHAR = 0x0286,
eWM_IME_REQUEST = 0x0288,
eWM_IME_KEYDOWN = 0x0290,
eWM_IME_KEYUP = 0x0291,
eWM_MOUSEHOVER = 0x02A1,
eWM_MOUSELEAVE = 0x02A3,
eWM_CUT = 0x0300,
eWM_COPY = 0x0301,
eWM_PASTE = 0x0302,
eWM_CLEAR = 0x0303,
eWM_UNDO = 0x0304,
eWM_RENDERFORMAT = 0x0305,
eWM_RENDERALLFORMATS = 0x0306,
eWM_DESTROYCLIPBOARD = 0x0307,
eWM_DRAWCLIPBOARD = 0x0308,
eWM_PAINTCLIPBOARD = 0x0309,
eWM_VSCROLLCLIPBOARD = 0x030A,
eWM_SIZECLIPBOARD = 0x030B,
eWM_ASKCBFORMATNAME = 0x030C,
eWM_CHANGECBCHAIN = 0x030D,
eWM_HSCROLLCLIPBOARD = 0x030E,
eWM_QUERYNEWPALETTE = 0x030F,
eWM_PALETTEISCHANGING = 0x0310,
eWM_PALETTECHANGED = 0x0311,
eWM_HOTKEY = 0x0312,
eWM_PRINT = 0x0317,
eWM_PRINTCLIENT = 0x0318,
eWM_HANDHELDFIRST = 0x0358,
eWM_HANDHELDLAST = 0x035F,
eWM_AFXFIRST = 0x0360,
eWM_AFXLAST = 0x037F,
eWM_PENWINFIRST = 0x0380,
eWM_PENWINLAST = 0x038F,
eWM_APP = 0x8000,
eWM_USER = 0x0400,
eWM_REFLECT = eWM_USER + 0x1c00
}
来源：CSDN
作者：沐雨迎风
链接：https://blog.csdn.net/zhanddkk/article/details/51548335