c# - Easiest way to read from and write to files - Stack Overflow
2011年9月27日 · These are the best and most commonly used methods for writing to and reading from files: using System.IO; File.AppendAllText(sFilePathAndName, sTextToWrite);//add text to existing file File.WriteAllText(sFilePathAndName, sTextToWrite);//will overwrite the text in …
How do I write data to a text file in C#? - Stack Overflow
2018年2月13日 · Copy an array of strings to new text file c#. Related. 2. Write to a text file. 1. writing to a text file. 1.
Asynchronous File Copy/Move in C# - Stack Overflow
2009年5月19日 · For smaller files, it's not a problem, but for large files just use File.Copy or an implementation of robocopy with parameter /mt (multithread). Note that this, copy file async, is still an open issue for .NET development: Provide overloads of File.Copy that …
c# - Better way to check if a Path is a File or a Directory? - Stack ...
File.Exists() will return false if it's not a file even if the directory does exist, so if it returns true, we know we got a file, if it returns false, we either have a directory or an invalid path so next we test if it's a valid directory with Directory.Exists() if that returns true, we have a …
What is the difference between File and FileInfo in C#?
Both members of the File and FileInfo class are decorated with the [System.Security.SecurityCritical] and [System.Security.SecuritySafeCritical] attribute but File class has 'multiple security checks' as compared to FileInfo class and the check is performed each time when you call a static member of the File class.
Rename a file in C# - Stack Overflow
2013年1月23日 · How do I rename a file using C#? I'd hate to add that there is a problem here all the solutions here especially if you do compares and are moving the file from one location to another (directory as well as filename) insofar as you should be aware that a volume could be a junction point... so if newname is q:\SomeJunctionDirectory\hello.txt and the old name is …
c# - Open existing file, append a single line - Stack Overflow
while opening the file. string path="C:\\MyFolder\\Notes.txt" StreamWriter writer = new StreamWriter(path, true); First parameter is a string to hold a full file path Second parameter is Append Mode, that in this case is made true. Writing to the file can be done with: writer.Write(string) or . writer.WriteLine(string) Sample Code
What's the fastest way to read a text file line-by-line?
2011年11月7日 · While File.ReadAllLines() is one of the simplest ways to read a file, it is also one of the slowest. If you're just wanting to read lines in a file without doing much, according to these benchmarks , the fastest way to read a file is the age old method of:
c# - How to get File Created Date and Modified Date - Stack …
2014年4月23日 · File.GetLastWriteTime Method. Returns the date and time the specified file or directory was last written to. string path = @"c:\Temp\MyTest.txt"; DateTime dt = File.GetLastWriteTime(path); For create time File.GetCreationTime Method
c# - Read last line of text file - Stack Overflow
2012年7月24日 · var lastLine = File.ReadLines("file.txt").Last(); Note that this uses File.ReadLines, not File.ReadAllLines. If you're using .NET 3.5 or earlier you'd need to use File.ReadAllLines or write your own code - ReadAllLines will read the whole file into memory in one go, whereas ReadLines streams it.