怎么锁定输入法

Question

我做了一个文本框。怎么锁定，输入法，只让用户输入123456789，不能输入其它 的

Answer 1

在TextChanged事件中^[0-9]{1,}$ 正则表达式   
Regex r = new   Regex("^[0-9]{1,}$");   
if(!r.IsMatch(textBox1.Text))   
{   
      Messagebox.Show("请输入数字");   
}

Answer 2

 private void textBoxAddWrite_KeyPress(object sender, KeyPressEventArgs e)
        {
            if ('0' > e.KeyChar || e.KeyChar > '9')//输入的按键值在‘0’～‘9’之间
            {
                if (e.KeyChar != 8)//不是backspace键
                    e.KeyChar = (char)0;//设定键值为0
            }

Answer 3

KEYPRESS事件里写： 
     Private Sub txt_BXPDJ02009_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs)
' 0ｷｰから9キーまでと、BSキー以外の場合
 If Not ((Strings.Asc("0") <= Strings.Asc(e.KeyChar) And Strings.Asc(e.KeyChar) <= Strings.Asc("9")) Or _
                            Strings.Asc(e.KeyChar) = 8 Or Strings.Asc(e.KeyChar) = Strings.Asc("-")) Then                        Messagebox.Show("请输入数字");  
                    End If
end sub

Answer 4

用正则表达式或用KeyPress和KeyDown事件控制

Answer 5

给你一个参考下吧private void textBox_KeyDown(object sender, KeyEventArgs e)
        {
            if ((e.KeyValue >= 48 && e.KeyValue <= 57) || e.KeyValue == 8 || e.KeyValue == 46 || e.KeyValue == 190)
            {
                if (_FormatMode == FilterMode.Number)
                {
                    if (e.KeyValue == 190)
                    {
                        isValidate = false;
                        isEnter = false;
                    }
                    else
                    {
                        isValidate = true;
                        isEnter = false;
                    }
                }
                else if (_FormatMode == FilterMode.NumberAndDot)
                {
                    isValidate = true;
                    isEnter = false;
                }
                else
                {
                    isValidate = false;
                    isEnter = false;
                }
            }
            else if (e.KeyValue == 13)
            {
                isValidate = true;
                isEnter = true;                decimal tmp = Convert.ToDecimal(this.textBox.Text.Trim());
                if (tmp <= _MinNumber)
                    tmp = _MinNumber;
                else if (tmp >= _MaxNumber)
                    tmp = _MaxNumber;                this.textBox.Text = tmp.ToString(_FormatString);
            }
            else
            {
                isValidate = false;
                isEnter = false;
            }            base.OnKeyDown(e);
        }        private void textBox_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (isValidate)
            {
                e.Handled = false;
            }
            else
                e.Handled = true;
            if (isEnter)
            {
                try
                {
                    Convert.ToDecimal(this.textBox.Text.Trim());
                }
                catch
                {
                    this.textBox.Text = "0";
                }                decimal tmp = Convert.ToDecimal(this.textBox.Text.Trim());
                if (tmp <= _MinNumber)
                    tmp = _MinNumber;
                else if (tmp >= _MaxNumber)
                    tmp = _MaxNumber;                this.textBox.Text = tmp.ToString(_FormatString);
            }            base.OnKeyPress(e);
        }