Can I display values in HEX using CNiNumEdit?

[Grant_LECO]

I get a type mismatch in my CNiNumEdit control if I enter hex char's A-F. I set my control to discrete mode because I just want integers and set my range from 0-255. Under the discrete field there is an option for Base and Interval. I try selecting base 2 or base 16 but it still says that I have a type mismatch if I have A-F in there. Please don't tell me that I can't change the radix any more. 🙂 I love that feature in CVI.

Grant

[Jason F.]

The discrete interval and base attributes are not used for formatting the numedit to display a certain radix/number base. Instead you change the formatstring attribute. For example if you want to display hex do the following:

m_NumEdit.FormatString = "\"0x\"2x";
m_NumEdit.Value = 0x2B;

The first line sets the format to display two hex digits and the second line enters the hex value of 2B to the CNiNumEdit control. If you want to, you can also set the formatstring at design time through the property pages under the format tab.

Now, to clear up the use of the discrete interval and base properties, these are used to set the size of each increment and the starting value for the control, respectively.

All of this information and more can be found in the Component
Works++ Online Help as well as the ComponentWorks Reference (after all CNiNumEdit is a wrapper for the CWNumEdit control). In the ComponentWorks++ Online Help look under the CNiAxis FormatString member to understand the formatstring's usage, this is a shared property among many of the controls.

Jason F.
Applications Engineer
National Instruments
www.ni.com/ask