最近在做一个虚拟键盘功能，代替鼠标键盘操作，效果如下:
实现思路:
1 构建中文-拼音 数据库，我用的是SQLite数据库，如
2 构建布局，如效果图
代码:
数据库代码文件 SqlHandler.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SQLite;
using System.Configuration;
using System.IO;
using System.Reflection;
using System.Windows.Forms;
namespace TestKeyBord
{
public class SqlHandler
{
public static void InitSQLite(string db,string table)
{
try
{
DbName = db;
TableName = table;
if (CreateDataBase())
{
_SQLiteCommand = _SQLiteConn.CreateCommand();
_SQLiteCommand.Connection = _SQLiteConn;
DesignerTable();
}
}
catch
{
}
}
public static System.Data.ConnectionState SqliteState
{
get { return _SQLiteConn.State; }
}
#region 数据成员定义
public static string DbName = "MedicalSystemLog";
public static string TableName = "MedicalLog";
public static string _SQLiteConnString = string.Empty;
public static SQLiteConnection _SQLiteConn = new SQLiteConnection();
public static SQLiteCommand _SQLiteCommand = new SQLiteCommand();
#endregion
#region 创建数据库文件
public static bool CreateDataBase()
{
try
{
_SQLiteConnString = "Data Source=" + DbName + ".db";
_SQLiteConn = new SQLiteConnection(_SQLiteConnString);
_SQLiteConn.Open();
_SQLiteCommand = _SQLiteConn.CreateCommand();
_SQLiteCommand.Connection = _SQLiteConn;
if (File.Exists(DbName + ".db"))
{
return true;
}
}
catch
{
// MessageBox.Show("日志系统加载失败!");
}
return false;
}
#endregion
/// <summary>
/// 矩阵是否连接
/// </summary>
public static bool MatrixIsConnected = false;
#region 创建表
public static void DesignerTable()
{
try
{
if (_SQLiteConn.State != System.Data.ConnectionState.Open)
{
_SQLiteConn.Open();
}
List<string> list = new List<string> { };
list.Add("ID VARCHAR(5)");//汉字ID
list.Add("Chinese VARCHAR(5)");//汉字
list.Add("English VARCHAR(10)");//拼音
CreateTabel(TableName, list);
list.Clear();
}
catch
{
// MessageBox.Show("创建日志数据库失败!");
}
}
public static bool ClearSystemLog()
{
try
{
if (_SQLiteConn.State != System.Data.ConnectionState.Open)
{
_SQLiteConn.Open();
}
if (_SQLiteConn.State == System.Data.ConnectionState.Open)
{
_SQLiteCommand.CommandText = "delete from " + TableName + ";";
_SQLiteCommand.ExecuteNonQuery();
}
_SQLiteConn.Close();
}
catch (Exception ex)
{
// MessageBox.Show("清除日志失败:" + ex.Message);
return false;
}
return true;
}
public static bool InsertData(string cn,string en,string id)
{
try
{
if (_SQLiteConn.State != System.Data.ConnectionState.Open)
{
_SQLiteConn.Open();
}
if (_SQLiteConn.State == System.Data.ConnectionState.Open)
{
_SQLiteCommand.CommandText = "insert into " + TableName + " values('" +
id + "','" + cn + "','" + en + "');";
_SQLiteCommand.ExecuteNonQuery();
}
_SQLiteConn.Close();
}
catch (Exception ex)
{
// MessageBox.Show("日志写入失败:" + ex.Message);
return false;
}
return true;
}
public static List<string[]> GetData(string en)
{
List<string[]> list = new List<string[]> { };
try
{
_SQLiteCommand.CommandText = "select * from " + TableName + " where English='"+en+"';";
using (SQLiteDataReader reader = _SQLiteCommand.ExecuteReader())
{
string[] items = new string[] { };
while (reader.Read())
{
items = new string[]
{
reader[0].ToString(),
reader[1].ToString(),
reader[2].ToString(),
};
list.Add(items);
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + "=== GetDocInfo() ===" + ex.StackTrace);
}
return list;
}
public static List<string> GetZnData(string en)
{
en = en.ToLower(); ;
List<string> list = new List<string> { };
try
{
_SQLiteCommand.CommandText = "select * from " + TableName + " where English='" + en + "';";
// MessageBox.Show(_SQLiteCommand.CommandText);
using (SQLiteDataReader reader = _SQLiteCommand.ExecuteReader())
{
string[] items = new string[] { };
while (reader.Read())
{
list.Add(reader["Chinese"].ToString());
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + "=== GetDocInfo() 2222 ===" + ex.StackTrace);
}
return list;
}
public static void CreateTabel(string tableName,List<string> columes )
{
if (_SQLiteConn.State != System.Data.ConnectionState.Open)
{
_SQLiteConn.Open();
}
if (_SQLiteConn.State == System.Data.ConnectionState.Open)
{
string sql = "SELECT COUNT(*) FROM sqlite_master where type='table' and name='" + tableName + "';";
_SQLiteCommand.CommandText = sql;
if (Convert.ToInt32(_SQLiteCommand.ExecuteScalar()) == 0)//1表示存在，0表示不存
{
sql = string.Empty;
foreach (string str in columes)
{
sql += str + ",";
}
_SQLiteCommand.CommandText = string.Format(
"CREATE TABLE {0} (" + sql.Substring(0, sql.Length - 1) + ")"
, tableName);
_SQLiteCommand.ExecuteNonQuery();
_SQLiteConn.Close();
}
}
else
{
MessageBox.Show("创建表失败，请打开数据库!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
public static string PinConvert(string en)
{
string data = "";
string enLow = en.ToLower();
for (int i = 0; i < enLow.Length; i++)
{
if (enLow[i].ToString() == "ā")
{
}
}
return data;
}
#endregion
}
}
源码下载地址: http://download.csdn.net/detail/taoerit/9686889
更新 2017-2-13 ，还有个简单的方法
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 TestForm
{
public partial class Form1 : Form
{
[DllImport("user32.dll", EntryPoint = "keybd_event")]
public static extern void keybd_event(
byte bVk, //定义一个虚据拟键码。键码值必须在1～254之间。
byte bScan, //定义该键的硬件扫描码
int dwFlags,
int dwExtraInfo
);
private void button1_Click(object sender, EventArgs e)
{
// 81 表示Q，具体看虚拟键盘表示码
textBox1.Focus();
keybd_event(81, 0, 0, 0); //Q压下
keybd_event(81, 0, 0x02, 0); //Q弹起
}
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
}
虚拟键盘码
