LabVIEW
read file without knowing full name
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List Folder
Straight from lv help
Straight from lv help
List Folder
Returns two arrays of strings listing the names of all files and folders found in path, filtering both arrays based upon pattern and filtering the file names array based upon the specified datalog type.
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datalog type can be any data type and restricts the file names returned to only datalog files containing records of the specified data type. Datalog records contain a time stamp cluster and a cluster of the front panel data. | ||||||
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path identifies the folder whose contents you want to determine. If this is not an existing folder, this function sets file names and folder names to empty arrays and returns an error. If path points to a VI library (*.llb), file names returns the contents of the VI library and folder names returns an empty array. | ||||||
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error in describes error conditions that occur before this
VI or function runs. The default is no error. If an
error occurred before this VI or function runs, the VI or function passes the
error in value to error out. This VI or
function runs normally only if no error occurred before this VI or function
runs. If an error occurs while this VI or function runs, it runs normally and
sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to
display the description of the error code. Use error in and
error out to check errors and to specify execution order by
wiring error out from one node to error in of
the next node.
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pattern restricts the files and directories returned to
those whose names match pattern. The pattern matching in this
function is similar to the matching used in matching wildcards in Windows and
Linux file names and is not like the regular expression matching performed by
the Match Pattern and Match Regular Expression
functions. If you specify characters other than the question mark character (?)
or the asterisk character (*), the function displays only files or directories
that contain those characters. You can use the question mark character (?) to
match any single character. You can use the asterisk character (*) to match any
sequence of one or more characters.
If pattern is an empty string, the VI returns all files and directories. | ||||||
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dup path returns path unchanged. | ||||||
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file names contains the names of the files found in the specified directory. This function sorts the file names alphabetically. | ||||||
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folder names contains the names of the folders found in the specified directory. This function sorts the folder names alphabetically. If path is an empty path, folder names contains the names of the drives on the computer. | ||||||
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error out contains error information. If error
in indicates that an error occurred before this VI or function ran,
error out contains the same error information. Otherwise, it
describes the error status that this VI or function produces. Right-click the
error out indicator on the front panel and select
Explain Error from the shortcut menu for more information about
the error.
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