Detect decimal separator

Question

I have to detect decimal separator in current windows setting. Im using visual studio 2010, windows form. In particular, if DecimalSeparator is comma, if user input dot in textbox1, I need show zero in textbox2.

I tryed with this code, but not works:

private void tbxDaConvertire_KeyPress(object sender, KeyPressEventArgs e)
    {
        string uiSep = CultureInfo.CurrentUICulture.NumberFormat.NumberDecimalSeparator;
        if (uiSep.Equals(","))
        {
            while (e.KeyChar == (char)46)
            {
                tbxConvertito.Text = "0";
            }
        } 
    }

I have tryed also this code, but not work:

private void tbxDaConvertire_KeyPress(object sender, KeyPressEventArgs e)
    {
        string uiSep = CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator;
        if (uiSep.Equals(","))
        {
            if (e.KeyChar == (char)46)
            {
                tbxConvertito.Text = "0";
            }
        } 
    }

Since we can't read your mind or see your screen from here, it would be really useful if you included an explanation of what "not works" means. — Ken White
Vincenzolopalo, for starters you do not need a while loop second you need to explain what you want better.. are you saying that you do not want to allow "," also when checking == vs .Equals you should know when to use one over the other normally when comparing Objects the .Equals would work.. either way.. your current logic is flawed why don't you use a Masked Edit instead..? — MethodMan
to solve your issue just use a MaskedTextBox <==click here to learn more about it — MethodMan
the number makes sense it's telling me 1500.00 are you trying to represent Currency..? you can get around that issue as well — MethodMan

Andres Andres · Accepted Answer · 2013-01-25T01:15:26

Solution:

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    char a = Convert.ToChar(Thread.CurrentThread.CurrentCulture.NumberFormat.NumberDecimalSeparator);
    if (e.KeyChar == a)
    {
        e.Handled = true;
        textBox1.Text = "0";
    }
}

That way, when you hit . or , you will have a 0 in your TextBox.

EDIT:

If you want to insert a 0 everytime you hit the decimal separator, this is the code:

char a = Convert.ToChar(CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator);
if (e.KeyChar == a)
{
    e.KeyChar = '0';
}

Detect decimal separator

3 Answers