c# – 在Windows Mobile中输入数字的最佳方法是什么？ (.NET CF

在 Windows Mobile(或常规Windows应用程序)中输入数字(尤其是非整数)的最简单方法是只有一个用户输入的文本框,然后验证他们输入了正确的数字.

Windows Mobile中这种方法的问题是默认SIP(软输入面板又名小弹出键盘)如下所示：

alt text http://img510.imageshack.us/img510/6210/sipreg.jpg

在真正的Windows Mobile设备上,SIP看起来甚至比这还小,并且正确地敲击顶部的小数字键是一个巨大的痛苦.您想要用于此目的的是数字模式,您可以通过单击左上角的“123”按钮获得该模式,如下所示：

alt text http://img16.imageshack.us/img16/6128/sipnum.jpg

这样做的问题在于,没有(简单)方式以编程方式使SIP的这种模式出现而不是常规键盘.要使SIP以数字模式显示,请将项目引用添加到Microsoft.WindowsCE.Forms,然后将此代码添加为名为“SIPHandler”的类(您必须将命名空间更改为项目的命名空间)：

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Drawing;
using Microsoft.WindowsCE.Forms;

namespace DeviceApplication1
{
    /// <summary>
    /// Handles showing and hiding of Soft Input Panel (SIP).  Better to use these
    /// methods than having an InputControl on a form.  InputControls behave oddly
    /// if you have multiple forms open.
    /// </summary>
    public class SIPHandler
    {
        public static void ShowSIP()
        {
            SipShowIM(1);
        }

        public static void ShowSIPNumeric()
        {
            SipShowIM(1);
            SetKeyboardToNumeric();
        }

        public static void ShowSIPRegular()
        {
            SipShowIM(1);
            SetKeyboardToRegular();
        }

        public static void HideSIP()
        {
            SipShowIM(0);
        }

        private static void SetKeyboardToRegular()
        {
            // Find the SIP window
            IntPtr hWnd = FindWindow("SipWndClass",null);
            // Go one level below as the actual SIP window is a child
            hWnd = GetWindow(hWnd,GW_CHILD);
            // Obtain its context and get a color sample
            // The premise here is that the numeric mode is controlled by a virtual button in the top left corner
            // Whenever the numeric mode is active,the button background will be of COLOR_WINDOW_TEXT
            IntPtr hDC = GetDC(hWnd);
            int pixel = GetPixel(hDC,2,2);
            // Notice that we cannot simply compare the color to the system color as the system color is 24 bit (or palette)
            // and the real color is dithered to 15-16 bits for most devices,so white (0xff,0xff,0xff) becomes
            // almost white (oxf8,0xfc,0xf8)

            // ken's hack:  here we only want to simulate the click if the keyboard is in numeric mode,in 
            // which case the back color will be WindowText
            //int clrText = (SystemColors.Window.R) | (SystemColors.Window.G << 8) | (SystemColors.Window.B << 16);
            int clrText = (SystemColors.WindowText.R) | (SystemColors.WindowText.G << 8) | (SystemColors.WindowText.B << 16);

            SetPixel(hDC,clrText);
            int pixelNew = GetPixel(hDC,2);
            // Restore the original pixel
            SetPixel(hDC,pixel);

            if (pixel == pixelNew)
            {
                // Simulate stylus click
                Message msg = Message.Create(hWnd,WM_LBUTTONDOWN,new IntPtr(1),new IntPtr(0x00090009));
                MessageWindow.SendMessage(ref msg);
                msg = Message.Create(hWnd,WM_LBUTTONUP,new IntPtr(0),new IntPtr(0x00090009));
                MessageWindow.SendMessage(ref msg);
            }
            // Free resources
            ReleaseDC(hWnd,hDC);
        }

        private static void SetKeyboardToNumeric()
        {
            // Find the SIP window
            IntPtr hWnd = FindWindow("SipWndClass",0xf8)
            int clrText = (SystemColors.Window.R) | (SystemColors.Window.G << 8) | (SystemColors.Window.B << 16);
            SetPixel(hDC,hDC);
        }

        [DllImport("coredll.dll")]
        private extern static bool SipShowIM(int dwFlag);

        [DllImport("coredll.dll")]
        private extern static IntPtr FindWindow(string wndClass,string caption);

        [DllImport("coredll.dll")]
        private extern static IntPtr GetWindow(IntPtr hWnd,int nType);

        [DllImport("coredll.dll")]
        private extern static int GetPixel(IntPtr hdc,int nXPos,int nYPos);

        [DllImport("coredll.dll")]
        private extern static void SetPixel(IntPtr hdc,int nYPos,int clr);

        [DllImport("coredll.dll")]
        private extern static IntPtr GetDC(IntPtr hWnd);

        [DllImport("coredll.dll")]
        private extern static void ReleaseDC(IntPtr hWnd,IntPtr hDC);

        [DllImport("coredll.dll")]
        private static extern bool SipSetCurrentIM(byte[] clsid);

        const int WM_LBUTTONDOWN = 0x0201;
        const int WM_LBUTTONUP = 0x0202;
        const int GW_CHILD = 5;

    }
}

抱歉长度.要以数字模式弹出SIP,只需使用以下行：

SIPHandler.ShowSIPNumeric();

或使其以常规键盘模式显示：

SIPHandler.ShowSIPRegular();

并再次隐藏它：

SIPHandler.HideSIP();

此代码背后的基本技巧是对左上角的颜色进行“查看”以确定SIP是否已经处于常规键盘或数字模式,然后在同一角落中模拟鼠标单击(如果需要)确保SIP处于所需模式.

注意：这是“借来的”网络代码,但我不知道从哪里获得它.如果有人知道这个黑客来自哪里,请告诉我,我很乐意将其归于原作者.

更新：好吧,经过2秒的谷歌搜索,我发现这段代码的近似来源是Daniel Moth：

http://www.danielmoth.com/Blog/InputPanelEx.cs

…谁将Alex Feinman归功于原作：

http://www.alexfeinman.com/download.asp?doc=IMSwitch.zip

多谢你们！这段代码实际上让我流泪一次(我当时正在切洋葱,但那不可能).