writetofile

问题 I am a beginner when it comes to Android. I encountered a problem, regarding writing to a file. I want to save to a file the input I get in a form. However, the piece of code that I wrote is not writing in my file. Could anyone please help me? The code looks like that: submit.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { StringBuilder s = new StringBuilder(); s.append("Event name: " + editText1.getText() + "|"); s.append("Date: " + editText2.getText()

问题 This question already has answers here : File write with [NSBundle mainBundle] fails (5 answers) Closed 6 years ago . When i try to write to file with this code: NSString *path = [[NSBundle mainBundle] pathForResource:@"default" ofType:@"txt"]; NSError *error = nil; NSString*s = @"some text"; BOOL successful = [s writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:&error]; NSLog(@"%@",error); NSLog(@"%d",successful); Nothing happens. NSLog says: (null) 1 回答1: That's because

问题 I want to ping an IP address every 5 seconds. If the ping fails, write the date and time to a file. Here is my non-working attempt... the loop works as intended, but I can't get it to write to a file if the ping fails. @ECHO OFF set IPADDRESS=172.30.1.36 set INTERVAL=5 :PINGINTERVAL ping %IPADDRESS% -n 1 if errorlevel 1 echo %date% %time% >> failurelog.txt timeout %INTERVAL% GOTO PINGINTERVAL 回答1: In ipv4, ping command only raises errorlevel if there are packets lost. But in you are pinging a

问题 I have a HashMap that stores external uids and then it stores a different id ( internal for our app ) that has been set for the given uid. e.g: 123.345.432=00001 123.354.433=00002 The map is checked by uid to make sure the same internal id will be used. If something is resent to the application. DICOMUID2StudyIdentiferMap defined as follows: private static Map DICOMUID2StudyIdentiferMap = Collections.synchronizedMap(new HashMap()); The load however will overwrite it, if we successfully load,

问题 I have an arraylist of class Room which is held in class Hostel , i would like to write this arraylist to a text file. What is the most efficient method of doing so? Hostel Class public class Hostel { private ArrayList < Room > rooms; } Room Class abstract class Room { public Room(int newRoomNo, boolean newRoomEnSuite, int newRoomNights, String newRoomBooker) { roomNo = newRoomNo; roomEnSuite = newRoomEnSuite; roomBooking = "Booked"; roomNights = newRoomNights; roomBooker = newRoomBooker; } }

问题 I have a file that I am currently reading from using fo = open("file.txt", "r") Then by doing file = open("newfile.txt", "w") file.write(fo.read()) file.write("Hello at the end of the file") fo.close() file.close() I basically copy the file to a new one, but also add some text at the end of the newly created file. How would I be able to insert that line say, in between two lines separated by an empty line? I.e: line 1 is right here <---- I want to insert here line 3 is right here Can I

问题 Whats the best way to write an observable collection to a txt file? I currently have the following public ObservableCollection<Account> SavedActionList = new ObservableCollection<Account>(); using (System.IO.StreamWriter file = new System.IO.StreamWriter("SavedAccounts.txt")) { foreach (Account item in SavedActionList) { file.WriteLine(item.ToString()); //doesn't work } file.Close(); } I'm not sure why it won't write to the file. Any ideas? 回答1: You can easily just write: File.WriteAllLines(

问题 i want to write a string in a file "file.txt": this file in my project (for Iphone) is inside Resources; I try to write a string in this file but it don't work, I show my code. NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"file.txt"]; NSError *error; [outputString writeToFile:filePath atomically:YES encoding

问题 i want to write a string in a file "file.txt": this file in my project (for Iphone) is inside Resources; I try to write a string in this file but it don't work, I show my code. NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"file.txt"]; NSError *error; [outputString writeToFile:filePath atomically:YES encoding

问题 I am trying to manipulate json file data in powershell and write it back to the file. Even before the manipulation, when I just read from the file, convert it to Json object in powershell and write it back to the file, some characters are being replaced by some codes. Following is my code: $jsonFileData = Get-Content $jsonFileLocation $jsonObject = $jsonFileData | ConvertFrom-Json ... (Modify jsonObject) # Commented out this code to write back the same object $jsonFileDataToWrite =