Is there an inherent limit to the length of a listbox in LabVIEW 2010?

[rickford66]

Is there an inherent limit to the length (number of lines) of a listbox in LabVIEW 2010?

Thanks.

[RavensFan · Accepted solution]

Probably limited to 2^32 entries. 

But I bet the UI becomes unmanageable long before that.  I experimented with putting 1 million entries in.  It worked, but my mouse clicks seemed to get slow.

[rickford66]

Ok, thanks.

[RavensFan]

I came to the 2^32 number because the underlying item list data in a listbox is a string array.  Array functions are geared towards using a U32 or I32 number to be able to index out the elements.

Actually, I'd argue the limit is 2^31 because the datatype of the list box is an I32.  So any number greater than 2^31 would exceed the limits for the listbox datatype.

[JÞB]

2^31-1 Bit 31 is the sign bit

[RavensFan]

2^31

Index value is 0 to 2^31-1.   A total of 2^31 items since counting starts at zero.   And yes, the 32nd bit (#31 if you count the LSb as being bit #0) is the sign bit.

[JÞB]

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@RavensFan wrote:

2^31

Index value is 0 to 2^31-1.   A total of 2^31 items since counting starts at zero.   And yes, the 32nd bit (#31 if you count the LSb as being bit #0) is the sign bit.

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D'Oh