C#textbox控件中只允许输入整数的问题

[liushaohuayunjie]

我的问题是在textbox控件中只允许输入整数，点击添加按钮后 将信息添加到listbox控件中。但现在让我头疼的是不知道如何限制只允许输入整数。望前辈解答，谢谢

[luxiaodongly]

重新 定义一个控件：public class NumberTextBox:System.Windows.Forms.TextBox

然后重写函数WndProc
截获WM_CHAR:消息 对这个消息 进行处理.

[卡索瓦]

http://blog.csdn.net/zh275589797/archive/2010/12/22/6091771.aspx

[sky_too_sky]

js
正则表达式

[rabbitlzx]

用MaskedTextBox控件

[thisiscandy]

http://topic.csdn.net/u/20080626/11/a17ab62f-aced-4774-8320-a97f6ebe5c8a.html
是winform的吧，这个链接中的比较全。

[wuyq11]

<input onkeyup="value=value.replace(/[^\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))">

Regex.IsMatch(strIn, @"^(0|[1-9]\d*)\.(\d\d)$");

[_三皮_]

private bool nonNumberEntered = false;
private void txtCYC_M_KeyDown(object sender, KeyEventArgs e)
{
// Initialize the flag to false.
nonNumberEntered = false;

// Determine whether the keystroke is a number from the top of the keyboard.
if (e.KeyCode < Keys.D0 || e.KeyCode > Keys.D9)
{
// Determine whether the keystroke is a number from the keypad.
if (e.KeyCode < Keys.NumPad0 || e.KeyCode > Keys.NumPad9)
{
// Determine whether the keystroke is a backspace.
if (e.KeyCode != Keys.Back)
{
// A non-numerical keystroke was pressed.
// Set the flag to true and evaluate in KeyPress event.
nonNumberEntered = true;
}
}
}
//If shift key was pressed, it's not a number.
if (Control.ModifierKeys == Keys.Shift)
{
nonNumberEntered = true;
}

}

private void txtCYC_M_KeyPress(object sender, KeyPressEventArgs e)
{
// Check for the flag being set in the KeyDown event.
if (nonNumberEntered == true)
{
// Stop the character from being entered into the control since it is non-numerical.
e.Handled = true;
}

}

[rabbitlzx]

各位，用得着搞这么复杂么，一个MaskedTextBox就搞定了，非要弄什么正则表达式？？