I need to trim a substring from a string, if that substring exists.
Specifically, if the string is "MainGUI.exe", then I need it to become "MainGUI", by trimming ".exe" from the string.
I tried this:
String line = "MainGUI.exe";
char[] exe = {'e', 'x', 'e', '.'};
line.TrimEnd(exe);
This gives me the correct answer for "MainGui.exe", but for something like "MainGUIe.exe" it doesn’t work, giving me "MainGUI" instead of "MainGUIe".
I am using C#. Thanks for the help!
Use the Path static class in System.IO namespace, it lets you strip extensions and directories from file names easily. You can also use it to get the extension, full path, etc. It's a very handy class and well worth looking into.
var filename = Path.GetFileNameWithoutExtension(line);
Gives you "MainGui", this is, of course, assuming you want to trim any file extension or you know your file is always going to be a .exe file, if you want to only trim extensions off of .exe files, however, and leave it on others. You can test first, either by using String.EndsWith() or by using the Path.GetExtension() method.
I would use Path.GetFileNameWithoutExtension instead of string manipulation to handle this.
string line = “MainGUI.exe”;
string fileWithoutExtension = Path.GetFileNameWithoutExtension(line);
If you only want to strip off the extension if it's .exe, you can check for that as well. The following will only strip off extensions of .exe, but leave all other extensions intact:
string ext = Path.GetExtension(line).ToLower();
string fileWithoutExtension = ext == ".exe"
? Path.GetFileNameWithoutExtension(line)
: line;
The Path class has a GetFileNameWithoutExtension.
If you are always trimming ".exe" you can trim the last 4 characters off regardless of the rest of the string.
line.Substring(0, line.Length - ".exe".Length);
string line = "MainGUI.exe";
if (line.EndsWith(".exe"))
line = line.Substring(0, line.Length - 4);
As no file extension has a dot (.) within it, you are safe to use this:
String line = "MainGUI.exe";
line = line.Substring(0, line.LastIndexOf('.'));
Related
In order to be able to read a file in asp.net, the file path must be written in this:
1.
C:\\yung\\Desktop
returns
however, the string that the fileUpload get returns is
2.
C:\yung\Desktop
After reading the comments i have this code:
string FilePath = FileUploadPublicInfo.PostedFile.FileName;
System.IO.StreamReader file = new System.IO.StreamReader(FilePath);
string line = File.ReadLines(FilePath.ToString()).Skip(4).ToString();
TextBox1.Text = line.ToString();
But now its giving this error:
System.Linq.Enumerable+<SkipIterator>d__30`1[System.String]
How to solve this problem?
Thank you.
I'm not so sure I understand the question, but I think you are looking for string.Replace:
string DoubleSlash(string singleSlash)
{
return singleSlash.Replace(#"\", #"\\");
}
The reason backslashes disappear is that C# compiler treats slashes in string literals as a special "escape" character. Because of this treatment, backslash needs to be encoded as two slashes in a regular string literal.
C# offers two ways of inserting backslashes the way you need:
Use verbatim literals - prefix it with "at" sign, i.e. #"C:\\yung\\Desktop", or
Double each slash - put two slashes for each slash in the result: C:\\\\yung\\\\Desktop
Ok, i have manage to solve this problem, turns out it was not reading anything.
This is the code that i finally get:
This is to retrieve the File's path, using this, would give the file path will double slash, so there is not a need for Replace(#"\",#"\")
string FilePath = FileUploadPublicInfo.PostedFile.FileName;
Then read the specified file
System.IO.StreamReader file = new System.IO.StreamReader(FilePath);
If you know which line you specifically want, this retrieves the 5th line
string line = File.ReadLines(FilePath.ToString()).Skip(4).First().ToString();
Thank you so much for your help...
I created a directory inside my WPF solution called Sounds and it holds sound files.(For example: mySound.wav).
Inside my code I use a List and there I have to add to those strings that relate to the sound files. In the beginning I used #"C:..." but I want it to be something like "UNIVERSAL" path. I tried using: "\Sounds\mySound.wav" but it generates an error.
The lines that I use there this directory are:
myList.Add("\Sounds\11000_0.2s.wav");//Error
using (WaveFileReader reader = new WaveFileReader(sourceFile))
where sourceFile is a string which express a path of the file.
Make sure that you check CopyToOutputDir in the properties of the soundfile, that will make sure the file is copied to the location you program runs from.
Also don't use single backslashes in the path since its an escape character.
Instead, do one of the following things:
Use a verbatim string:
#"Sounds\11000_0.2s.wav"
Escape the escape char:
"Sounds\\11000_0.2s.wav"
Use forward slashes:
"Sounds/11000_0.2s.wav"
For more information on string literals check msdn.
You either need to escape the / in the string or add the string literal indicator # at the beginning of the string.
Escape example:
var myFilePath = "c:\\Temp\\MyFile.txt";
String literal example:
var myFilePath = #"c:\Temp\MyFile.txt";
I have a path and I want to add to it some new sub folder named test.
Please help me find out how to do that.
My code is :
string path = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures);
Console.WriteLine(path+"\test");
The result I'm getting is : "c:\Users\My Name\Pictures est"
Please help me find out the right way.
Do not try to build pathnames concatenating strings. Use the Path.Combine method
string path = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures);
Console.WriteLine(Path.Combine(path, "test"));
The Path class contains many useful static methods to handle strings that contains paths, filenames and extensions. This class is very useful to avoid many common errors and also allows to code for a better portability between operating systems ("\" on win, "/" on Linux)
The Path class is defined in the namespace System.IO.
You need to add using System.IO; to your code
You need escape it. \t is an escape-sequence for Tabs 0x09.
path + "\\test"
or use:
path + #"\test"
Better yet, let Path.Combine do the dirty work for you:
Path.Combine(path, "test");
Path resides in the System.IO namespace.
There are two options:
Use the # symbol e.g.: path + #"\test"
use a double backslash e.g.: path + "\\test"
string add;
add += "\\"; //or :"\\" means backslash
Backslash '\' is an escape character for strings in C#.
You can:
use Path.Combine
Path.Combine(path, "test");
escape the escape character.
Console.WriteLine(path+"\\test");
use the verbatim string literal.
Console.WriteLine(path + #"\test");
the backslash is an escape character, so use
Console.WriteLine(path+"\\test");
or
Console.WriteLine(path+#"\test");
I have file name which look like
Directory\name-secondName-blabla.txt
If I using string .split my code need to know the separator I am using,
But if in some day I will replace the separator my code will break
Is the any build in way to split to get the following result?
Directory
name
secondNmae
blabla
txt
Thanks
Edit My question is more general than just split file name, is splitting string in general
The best way to split a filename is to use System.IO.Path
You're not clear about what to do with directory1\directory2\ ,
but in general you should use this static class to find the path, name and suffix parts.
After that you will need String.Split() to handle the - separators, you'll just have to make the separator(s) a config setting.
You can make an array with seperators:
string value = "Directory\name-secondName-blabla.txt";
char[] delimiters = new char[] { '\\', '-', '.' };
string[] parts = value.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);
var filepath = #"Directory\name-secondName-blabla.txt";
var tokens = filepath.Split(new[]{'\\', '-'});
If you're worried about your separator token changing in the future, set it as a constant in a settings file so you only have to change it in one place. Or, if you think it is going to change regularly, put it in a config file so you don't have to release new builds every time.
As Henk suggested above, use System.IO.Path and its static methods like GetFileNameWithoutExtenstion, GetDirectoryName, etc. Have a look at this link:
http://msdn.microsoft.com/en-us/library/system.io.path.aspx
In C#, I have a filename that needs to converted to be double-escaped (because I feed this string into a regex).
In other words, if I have:
FileInfo file = new FileInfo(#"c:\windows\foo.txt");
string fileName = file.FullName;
fileName is: c:\\\\windows\\\\foo.txt
But I need to convert this to have sequences of two literal backslashes \\ in the fileName.
fileName needs to be #"c:\\\\windows\\\\foo.txt", or "c:\\\\\\\\windows\\\\\\\\foo.txt".
Is there an easy way to make this conversion?
I Think you're looking for Regex.Escape
Regex.Escape(#"c:\test.txt") == #"C:\\Test\.txt"
notice how it also escapes '.'
simplest without resorting to regex for this part:
string fileName = file.FullName.Replace(#"\", #"\\\\");
based on OP, but I think you really want this:
string fileName = file.FullName.Replace(#"\", #"\\");
That being said, I can't see how you want to use it... it shouldn't need escaping at all... maybe you should post more code?