Question

c#textbox 只能输入数字，小数点.怎么做

Answer 1

private void textBox2_KeyPress(object sender, KeyPressEventArgs e)
{
if (!(Char.IsNumber(e.KeyChar)) && e.KeyChar != (char)13 && e.KeyChar != (char)8)
{
if(e.KeyChar == ‘.’）
{
e.Handled = false;
}
else
e.Handled = true;
MessageBox.Show("只能输入数字和小数点!");
}
else
{
e.Handled = false;
}
}