determine STRING CONTROL

[elyan]

Hi all:

How can I determine or to limit  STRING CONTROL to 20 characters only , not allowing more than that

thanks  

[Norbert_B]

There is no default method to do this. The only thing you can do is to limit the control to one line; that means that pressing enter after entering some symbols will leave the control and pass the symbols as new string to the VI.
So you have to solve this within your application. But i want to suggest something else:
It is most often the best to let the user choose between settings than to let him enter some setting "freely". This can lead to mistyping => unhappy to use.....

hope this helps,
Norbert

[parthabe]

You have to use the String Subset primitive to achieve what you need.

In addition, you have to check the options 'Limit to single line' & Update string while typing' from the rt-click short-cut menu of the string control.

See the attached VI.

[JB]

Here is one example that shows how to implement this in your code. The Update Value while Typing option of the string control must be set.