用c#的textbox来模拟手机键盘输入的方法

Question

我说一个思路,你尽力自己去写这样对你有帮助;
你的按键是有八次按下事件,这个可以计数来判断;
每一次可以显示不同的字符或数字,
还有一个就是时间间隔,可以用计时器来判断间隔时间自己定;
在KeyPress事件里完成就可以了.希望对你有用 !!

Answer 1

向窗口添加一个textbox,一个button，一个timer;
定义三个全局变量：        public static int i = 0;//记录按钮按下的次数
        public static int time = 0;//记录时间，本例定义为3秒不按键，则记录字符
        public static string str = "";用于控制textbox的显示
事件如下：
        private void button1_Click(object sender, EventArgs e)//按钮单击事件
        {
            timer1.Start();
            i++;
            if (i == 8)
            {
                i = 1;
            }
            if (time >= 3)
            {
                str = textBox1.Text;
                time = 0;
            }
            switch (i)
            {
                case 1:
                    {
                        textBox1.Text = str+"2";
                        break;
                    }
                case 2:
                    {
                        textBox1.Text = str + "A";
                        break;
                    }
                case 3:
                    {
                        textBox1.Text = str + "B";
                        break;
                    }
                case 4:
                    {
                        textBox1.Text = str + "C";
                        break;
                    }
                case 5:
                    {
                        textBox1.Text = str + "a";
                        break;
                    }
                case 6:
                    {
                        textBox1.Text = str + "b";
                        break;
                    }
                case 7:
                    {
                        textBox1.Text = str + "c";
                        break;
                    }
            }
                    }        private void timer1_Tick(object sender, EventArgs e)//计时器事件
        {
            time++;
        }

Answer 2

timer的Interval属性定为1000即1秒间隔。

Answer 3

在txtbox的KeyDown事件里面处理，
开一个定时器，然后就是时间判断，你想怎么实现都行

Answer 4

int m_intInterval = 1000;
        DateTime m_dtLast = DateTime.Now;
        char m_chrInput = '\0';
        char[][] KEYPAD = new char[][] { new char[]{ '0' }, 
                                         new char[]{'1'},
                                         new char[] { '2', 'a', 'b', 'c' },
                                         new char[] { '3', 'd', 'e', 'f' },
                                         new char[] {'4','g','h','i'},
                                         new char[] {'5','j','k','l'},
                                         new char[] {'6','m','n','o'},
                                         new char[] {'7','p','q','r','s'},
                                         new char[] {'8','t','u','v'},
                                         new char[] {'9','w','x','y','z'}};
        int m_intIndex = 0;        public Form1()
        {
            InitializeComponent();
        }        private void txtInput_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (InKeyPad(e.KeyChar))
            {                if (this.m_chrInput == '\0')
                {
                    this.m_dtLast = DateTime.Now;
                    this.m_chrInput = e.KeyChar;
                    this.m_intIndex = 0;
                }
                else
                {
                    TimeSpan tsInterval = DateTime.Now - this.m_dtLast;
                    if ((this.m_chrInput == e.KeyChar) && (tsInterval.TotalMilliseconds <= this.m_intInterval))
                    {
                        int iKeyIndex = e.KeyChar - '0';
                        if (this.m_intIndex == this.KEYPAD[iKeyIndex].Length - 1)
                            this.m_intIndex = 0;
                        else
                            this.m_intIndex++;
                        e.KeyChar = this.KEYPAD[iKeyIndex][this.m_intIndex];
                        if (this.txtInput.Text.Length > 0)
                        {
                            this.txtInput.Text = this.txtInput.Text.Substring(0, this.txtInput.Text.Length - 1);
                            this.txtInput.SelectionStart = this.txtInput.Text.Length;
                        }
                        this.m_dtLast = DateTime.Now;
                    }
                    else
                    {
                        this.m_dtLast = DateTime.Now;
                        this.m_chrInput = e.KeyChar;
                        this.m_intIndex = 0;
                    }
                }
            }
            else
            {
                this.m_dtLast = DateTime.Now;
                this.m_chrInput = '\0';
                this.m_intIndex = 0;             
            }
        }        private bool InKeyPad(char p_chrInput)
        {
            for (int i = 0; i < this.KEYPAD.Length; i++)
            {
                if (p_chrInput == this.KEYPAD[i][0])
                    return (true);
            }
            return (false);
        }
    }

Answer 5

fmlboy :你的程序可以很稳定的跑在windows界面下，如果是在compact framework下就不行了
报错
System.Windows.Forms.KeyPressEventArgs.KeyChar' cannot be assigned to -- it is read only不知道有没有解决方法，一旦解决，就给分
不够再加分

Answer 6

改一下这段
//e.KeyChar = this.KEYPAD[iKeyIndex][this.m_intIndex]; 
                        
                        if (this.txtInput.Text.Length > 0) 
                        { 
                            this.txtInput.Text = this.txtInput.Text.Substring(0, this.txtInput.Text.Length - 1); 
                            //this.txtInput.SelectionStart = this.txtInput.Text.Length; 
                        }
                        this.txtInput.Text = this.txtInput.Text + this.KEYPAD[iKeyIndex][this.m_intIndex];
                        this.txtInput.SelectionStart = this.txtInput.Text.Length; 
                        e.Handled = true;但这程序有个明显的缺陷，就是只对最后一位输入时才是正确的，所以要真正使用，要楼主改一下哟^_^