WinForms: NumericUpDown (.NET CF 3.5) and real numbers

Question

NumericUpDown seems to be only dealing with integers. How can I modify it (?), so I can use doubles as Value and Increment?

Answer 1

There is a property called DecimalPlaces. Set it to something grater than 0 and it will allow you to work with decimals

Answer 2

NumericUpDown works with decimal types, but is integer only on the compact framework. This is a limitation of the class on CF.

There is, however, a CodeProject UserControl that provides an implementation for CF.

Answer 3

I just use a textbox, then override the OnKeyPress event. This code has worked for me in the past, but is only good for groups that write 1234.56, not 1234,56.

public partial class NumberTextBox : TextBox
{
    public NumberTextBox()
    {
        InitializeComponent();
    }

    public decimal Value
    {
        get
        {
            try
            {
                return decimal.Parse(Text);
            }
            catch (Exception)
            {
                return -1;
            }
        }
    }

    public int ValueInt
    {
        get { return int.Parse(Text); }
    }

    protected override void OnKeyPress(KeyPressEventArgs e)
    {
        if (!char.IsControl(e.KeyChar)
            && !char.IsDigit(e.KeyChar)
            && e.KeyChar != '.')
        {
            e.Handled = true;
        }

        // only allow one decimal point
        if (e.KeyChar == '.' && (this).Text.IndexOf('.') > -1)
        {
            e.Handled = true;
        }
        base.OnKeyPress(e);
    }

    public void AppendString(string value)
    {
        if (string.IsNullOrEmpty(value))
        {
            Text = string.Empty;
        }
        else
        {
            if (value == "." && Text.IndexOf('.') > -1)
                return;
            Text += value;
        }
    }
}