Question

Hi I am using devexpress and I set the mask type to numeric and the edit mask to “p”.
The problem is I want to limit the masked textbox to 100 percent maximum and not to accept
negative.

Best Regards,

Answer 1

You should not be trying to set the minimum/maximum values with an EditMask. The ‘p’ EditMask is correctly limiting entry to valid percentage strings, but 123 % or -17.5 % are valid percentages.

Instead you should either limit the values that are accepted by implementing an EditValueChanging event (you can set Cancel if you want to reject a user’s input). Also, many of the DevExpress editors have MaxValue and MinValue properties, such as SpinEdit.

Edit to include sample code

    void spinEdit1_EditValueChanging(object sender, DevExpress.XtraEditors.Controls.ChangingEventArgs e)
    {
        Decimal newValue;
        if (Decimal.TryParse(e.NewValue.ToString(), out newValue))
        {
            if (newValue < 0 || newValue > 100)
                e.Cancel = true;
        }
    }