LabVIEW
Case structure / string as case selector / selector label contains parts of string
Hi Micha,
@MichaGue_01 wrote:
I want use the case structure to switch between the different cases.
How can I choose the case selector, so that it switches between
- $ / Device id is / Mode is / ...
You can create a case for each input string you want to handle. The case structure also allows to en-/disable case sensitivity for string inputs…
That being said: if you want to handle a big amount of different strings it would make sense to parse the strings before your case structure into a cluster of relevant information. In the case structure you can create different cases for e.g. your "mode" indicator and read the DeviceID from your cluster…
The case itself is primitive. You can only switch based on ranges. This means > and = is used for comparison, even for strings. So, you can switch based on switch ranges, but that's it.
For you situation, you should be able to make 4 cases:
"Device id is 0".."Device id is @"
"$0".."$@"
"Mode is 0".."Mode is @"
Default
This defines ranges, for instance $0..$@ will match anything greater or equal to $0, and not greater or equal than $@. @ is the next character after 9.
Weirdly enough, for strings "0".."9" will not include 9. For numbers, it will. I'm sure there is a reason...
If you want more advanced switching, pre-process the string using match pattern or match regular expression (or anything really). That should result in either a string or an index. Use that in a case structure.
Search LabVIEW like a graph! Hi wiebe,
wiebe@CARYA wrote:
Weirdly enough, for strings "0".."9" will not include 9. For numbers, it will. I'm sure there is a reason...
As is written in the help… 🙂
@GerdW wrote:
Hi wiebe,
wiebe@CARYA wrote:
Weirdly enough, for strings "0".."9" will not include 9. For numbers, it will. I'm sure there is a reason...
As is written in the help… 🙂
There's not much of a reason though.
I know it's not a bug, but definitely a cause of bugs 😉.
