C
C#A Name

❔ Writing to StreamWriter Fails

Hi, I was experimenting with permanently saving things for the first time and ran into problems. Despite the code looking right, it doesn't seem to work. I'm relatively new to this, so it's likely i messed something up, but help would be appericiated Related code below: 
public static StreamWriter UserSaveData = new("C:\\Users\\name\\source\\repos\\AuctionHouseDiscord\\AuctionHouseDiscord\\UserData.txt");
public static StreamWriter UserSaveData = new("C:\\Users\\name\\source\\repos\\AuctionHouseDiscord\\AuctionHouseDiscord\\UserData.txt");
other code 
//galleon count is an int
//withing an async task if that matters
UserSaveData.WriteLine(GalleonCount.ToString());
//galleon count is an int
//withing an async task if that matters
UserSaveData.WriteLine(GalleonCount.ToString());
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
What problem are you facing?
AN
A Name•383d ago
nothing happens
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
No UserData.txt file is created?
AN
A Name•383d ago
well the file is there its just blank
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
Try disposing the stream before exiting UserSaveData.Dispose()
AN
A Name•383d ago
alright just anywhere?
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
Can you show the full code 😅 ?
AN
A Name•383d ago
accidiently closed it before it wrote ):
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
Yeah, you only dispose the stream after you've done using it
AN
A Name•383d ago
gonna put it right after it writes
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
No
AN
A Name•383d ago
oh
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
Put it after you've written all your data
AN
A Name•383d ago
i only write once oh it just started working thanks whats dispose do exactly? oh does it dump everything youve written into the text file?
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
Typically you call dispose with using expression like this This will automatically call dispose when the scope ends 
using var UserSaveData = new StreamWriter("C:\\Users\\name\\source\\repos\\AuctionHouseDiscord\\AuctionHouseDiscord\\UserData.txt");
UserSaveData.WriteLine(GalleonCount.ToString());
using var UserSaveData = new StreamWriter("C:\\Users\\name\\source\\repos\\AuctionHouseDiscord\\AuctionHouseDiscord\\UserData.txt");
UserSaveData.WriteLine(GalleonCount.ToString());
The implementation of dispose depends on the type, for streamwriter it flushes the data and closes the stream.
AN
A Name•383d ago
i see so should i put this instead of the writeline i have now?
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
Well, I don't know why you have UserSaveData as a static field If it's only used once, then declare it and initialize it in the scope that uses it ThumbsUpSmile
AN
A Name•383d ago
for now its only used once
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
Ah okay, then using expression won't be ideal
AN
A Name•383d ago
what might i use instead? i cant really just call it when it closes because crashes and stuff
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
Just dispose the stream once you've done writing to it
A
Angius•383d ago
Just use using
AN
A Name•383d ago
im still a little confused
A
Angius•383d ago
So it gets disposed when needed
AN
A Name•383d ago
do i need to redeclare it if i need it again? with using or a varriable
A
Angius•383d ago
using var sw = new StreamWriter("file.txt");
sw.WriteLine("Hello World!");
using var sw = new StreamWriter("file.txt");
sw.WriteLine("Hello World!");
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
using will dispose it automatically
A
Angius•383d ago
It'll get disposed at the end of a scope
AN
A Name•383d ago
i see if im using async tasks nvm
K
Kouhai ／人◕ ‿‿ ◕人＼•383d ago
This won't work with your static field stream
AN
A Name•383d ago
thats a stupid question to be clear do I need the full path everytime? or can i just do it how you did
A
Angius•383d ago
You need a path Mine was relative
AN
A Name•383d ago
ah
A
Angius•383d ago
You can use an absolute one Or use the special directory enum thing
AN
A Name•383d ago
strings work as pathing correct ?
A
Angius•383d ago
Uh, yes
AN
A Name•383d ago
alr thanks sorry to bother you again but i switched to using and it does not appear to work
A
Angius•383d ago
Show $code
M
MODiX•383d ago
To post C# code type the following: ```cs // code here ``` Get an example by typing $codegif in chat If your code is too long, post it to: https://paste.mod.gg/
A
Angius•383d ago
And elaborate on "does not appear to work"
AN
A Name•383d ago
its not doing anything relevant lines: outside of task 
 public static string UserDataPath = "C:\\Users\\Jason Lin\\source\\repos\\AuctionHouseDiscord\\AuctionHouseDiscord\\UserData.txt";
 public static string UserDataPath = "C:\\Users\\Jason Lin\\source\\repos\\AuctionHouseDiscord\\AuctionHouseDiscord\\UserData.txt";
inside of task 
using var UserData = new StreamWriter(UserDataPath);
using var UserData = new StreamWriter(UserDataPath);
                                   UserData.WriteLine(GalleonCount.ToString());
                                   UserData.WriteLine(GalleonCount.ToString());
A
Angius•383d ago
Ah, well, we're doing with asynchronous code, then?
AN
A Name•383d ago
yes is that a problem?
A
Angius•383d ago
Might be I'll need some more of this code
AN
A Name•383d ago
it uses dsharp is that ok? thats a discord bot libary
A
Angius•383d ago
As long as you're not using async void methods, it should be fine And as long as any async Task methods are awaited
AN
A Name•383d ago
A
Angius•383d ago
Ah, the streamwriter is instantiated inside of the main And you're writing to it inside of an event
AN
A Name•383d ago
ah i see i just need to move it inside? works now thanks
A
Angius•383d ago
Tbh since you're not writing a lot, I'd just use File.AppendAllTextAsync() instead, for example But if it works, it works
AN
A Name•383d ago
planning to write more later not a completely related question, but is there a way to write on a specfic line thats not the last like for example if i want to write to line 5 specfically?
A
Angius•383d ago
Odd requirement, but maybe? Could do 
var lines = File.ReadAllLines(fileName);
lines[line_to_edit] = newText;
File.WriteAllLines(fileName, lines);
var lines = File.ReadAllLines(fileName);
lines[line_to_edit] = newText;
File.WriteAllLines(fileName, lines);
Not sure about streamwriter tho
AN
A Name•383d ago
doesnt really work due to what i orignally intended but thanks anyways wanted to avoid data being lost when two people changed things at same time
A
Angius•383d ago
Ideally, you'd implement some locking mechanism Or give each user their own file (at which point just use a database)
AN
A Name•383d ago
im thinking of making it just update every one second like it saves all the data in a list then writes all the data after one second theoretically that should avoid data loss theoretically but if someone writes data in that one second it might get duplicated ahhhh
J
jcotton42•383d ago
@A Name what kind of application is this? the approach you just described would be both difficult and error prone
AN
A Name•383d ago
a discord bot
J
jcotton42•383d ago
and what are you storing?
AN
A Name•383d ago
user data, mainly ints
J
jcotton42•383d ago
you really are going to want a database sqlite, via ef core, would be a good option
P
Pixel•382d ago
P
Pixel•382d ago
This would be the library i'd recommend, quite nice to work with and has plenty of documentation
J
jcotton42•382d ago
That with EF on top yeah
A
Accord•374d ago
Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.
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