In a program I am creating I want to write to a txt file. I know how to do this, however the method I use requires me to know the entire file path of the target file. Is there a way to do this without knowing the entire file path, or, if possible, write to a file located in the project resources?
There are several possible solutions:
Write the contents of the file to MemoryStream and when you know the path of the file write the stream to the file.
Write the file contents to a temporary file, and when you know the path of the file, copy the temporary file to the same path
Related
I have a function that generates a PDF file and i want to get the Uri's of the file to stoke it locally and then send it as an attachment with MailComposer. I want to know what's the difference between readAsStringAsync() and writeAsStringAsync() in FileSystem?
Both readAsStringAsync() and writeAsStringAsync() are functions of Expo FileSystem.
But the difference is readAsStringAsync() used to read a local files of the device. While writeAsStringAsync() is used to write onto a local file or create a file (if the named file does not exist on the location)
According to Expo Documentation documentation
FileSystem.writeAsStringAsync:
"Write the entire contents of a file as a string."
FileSystem.readAsStringAsync:
"Read the entire contents of a file as a string. Binary will be returned in raw format, you will need to append data:image/png;base64, to use it as Base64."
Is it possible to manipulate the content of an MS Word file contained inside a .zip file, without extracting it?
I have 2,000 zip files containing Word files. I need to modify the same field in each of the 2,000 zipped MS Word files. Is this possible without extracting the file first?
Yes it is possible, but the difference is semantics. When I do this, with single documents, I COPY (not extract) the xml file from the zip container, edit as required, and then OVERWRITE back into the zip container.
I've also tried to edit the file from within the zip file, but it can't be saved directly (at least not the way I have tried) - so (for example in NotePad++) file SaveAs would be required...
I am developing a zip extractor app for which if i unzip multiple times the same zip file it should extract like myfile-1, myfile-2, myfile-3 something like this .
example : there is sampleproject.zip in my desktop when i unzip it should be like sampleproject, sampleproject-1, sampleproject-2.
Any Suggestions.
Thanks in Advance!
Based on your comment I suggest you unzip your file to a temporary directory and then move its contents into the actual directory, handling any name clashes as you do that. In outline:
Use URLForDirectory:inDomain:appropriateForURL:create:error: to create a temporary directory suitable to unzip into. You should pass your the URL of your destinationPath for the appropriateForURL: parameter; this should give you a temporary directory on the same volume as destinationPath making placing the unzipped items into the right place moves rather than copies.
Unzip into the temporary directory returned by (1)
Now use NSFileManager calls to traverse the temporary directory moving each item found to destinationPath, renaming as needed to avoid name clashes.
Remove the temporary directory.
If you have problems implementing this algorithm ask a new question, show your code, explain your problem, and include a link back to this question so the thread can be followed. Someone will then undoubtedly help you with the next step.
HTH
I am working on vb.net application where I wanted to create and read a file. File will have specific extension for ex. .abcb the way I want my application to work is:
can create a file with .abcd extension
should read .abcd files only(and also application created files only so altered extension shouldn't be working)
.abcd files should show some garbage data when open in any other application(ex. word, notepad any image viewer etc.)
Now my application does 1,2(partly) step, i.e. it creates a file and load data also, it reads .abcd files only(not the altered files)
but created file can be read by other software's also.I tried searching a lot but have not found anything and don't know where to start.
Any help is appreciated!
if you don't want other programs to be able to read the content of your file then your going to have to mask it in some way, which is usually done with encryption.
assuming your not too worried about the key being compromised, the easiest way to accomplish this would be to generate a key with something like System.Security.Cryptography and use that key to encyrpt everything you send to the file and everything you read from it.
as for making your own file extension, you can make the extension of a file whatever you want when you make it:
Dim fs As FileStream = File.Create("/path/to/file/filename" & ".abcd")
the only thing that the extension does is tell the OS what progam to use when opening a file by default, which will probably be notepad since your making your own extension
Is it possible to get the actual file, or the file that gets copied from version control to a location?
This sounds confusing. Basically I have the file path of the version controlled file, but I need an actual path to the file because I need to make a cconsole command using powershell.exe. The file will look something like this
$/MyTeamProject/MyProject/Development/MyPowershellScript.ps1
Now, I am looking for a vb expression to see if I can get the actual file and make call the powershell.exe command from console. Any thoughts?
You may use VersionControlServer.GetItem(String path) to obtain a reference to the Item. Then use Item.DownloadFile() or Item.DownloadFile(String localPath) to copy the file locally. I have a variation of this that creates a shipment based on multiple changesets.