限制只能输入数字:
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if ((e.KeyChar >= '0' && e.KeyChar <= '9') || (byte)(e.KeyChar) == 8)//8就是回格，backspace(删除).
{
}
else
{
e.Handled = true;
}
}
限制只能输入数字和一个小数点:
要限制输入的textbox的Keypress事件:
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if ((e.KeyChar >= '0' && e.KeyChar <= '9') || e.KeyChar == '.' || (byte)(e.KeyChar) == 8)//8就是回格，backspace(删除).
{
if (e.KeyChar == '.' && (sender as TextBox).Text.IndexOf('.') >= 0)
{
e.Handled = true;
}
}
else
{
e.Handled = true;
}
}