How to delete the content of a directory?

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emanuela.berton asked Jul 21, '20 emanuela.berton commented Jul 23, '20

How to delete the content of a directory?

Good morning, I'm writing in a specific folder some txt files as log. Before start to write any file I want to delete the folder content or at least delete some files in it, but I don't find the right command to do this. Can you help me? Thanks

Software Version:

FlexSim 18.1.2

flexsim 18.1.2 delete file

· 2

Jeff Nordgren commented · Jul 21, 2020 at 02:50 PM

@emanuela.berton,

Not sure if this is what your looking for or not. It deals with only single files (at a time). Would something like this work for you?

From the User Manual:

fileopen (str filename [, str opentype])

Opens the FlexSim file interfaceDescriptionOpens the FlexSim file interface. Returns 1 if successful. Returns 0 if an error is encountered.

Parameter 2 can be "w" for writing, "r" for reading, or "a" for appending. Default is "w". Use the commands fpt(), fpr(), fpf(), etc. to write to the opened text file. Use filereadline() to read a line from the file. Using this command, you can only have one file open at a time. To write to multiple files simultaneously, use the C standard fopen/fclose commands or C++ standard fstream classes in C++ or through a dll.

If in write mode, the contents of the file will be cleared, and the file pointer will be set to the top of the file. The file must be closed to save any data written to the file.Examplefileopen("C:/myfile.txt", "w");

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emanuela.berton Jeff Nordgren commented · Jul 22, 2020 at 06:33 AM

Thanks for your answer but it is not exactly what I need. I know how to create and write files, but my situation is this.

I have a directory, ex. C:\temp\logfile, where I write several files similar to these event1.txt, event2.txt, event3.txt, ecc. While my model is running I catch some events and for each fired event I write a specific file with a suffix (progressive counter or other) with some specific information. When I reset the model I would delete all files in the directory in order to start from zero with my data with a empty situation. I read some old posts of about 2 years ago where this is not possible using Flexsim instructions, but I hope you should find other way to do the same thing. Thanks for any suggestion.

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Answer 1 · 2020-07-22T16:22:04Z

Phil BoBo answered Jul 22, '20 emanuela.berton commented Jul 23, '20

string directory = "C:\\temp\\logfile\\";
treenode temp = model().first.subnodes.assert("temp");
temp.subnodes.clear();
getfilesindirectory(directory, "txt", temp);
for (int r = 1; r <= temp.subnodes.length; r++) {
    string fileName = temp.subnodes[r].value;
    applicationcommand("deletefile", directory + fileName);
}

Note that deleting files is not immediate. When you programmatically delete a file in Windows, it marks it for deletion and then actually deletes it later.

So if you query whether the file is still there on the line immediately after "deletefile," then the file will probably still exist. You need to separate your file deletion from your querying or creation of those files by some amount of real time.

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emanuela.berton commented · Jul 23, 2020 at 06:35 AM

Thanks Phil, it is exactly what I need. I updated my model and it works as I expected.

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