So I have a few file extensions in my C# projects and I need to remove them from the file name if they are there.
So far I know I can check if a Sub-string is in a File Name.
if (stringValue.Contains(anotherStringValue))
{
// Do Something //
}
So if say stringValue is test.asm, and then it contains .asm, I want to somehow remove the .asm from stringValue.
How can I do this?
if you want a "blacklist" approach coupled with the Path library:
// list of extensions you want removed
String[] badExtensions = new[]{ ".asm" };
// original filename
String filename = "test.asm";
// test if the filename has a bad extension
if (badExtensions.Contains(Path.GetExtension(filename).ToLower())){
// it does, so remove it
filename = Path.GetFileNameWithoutExtension(filename);
}
examples processed:
test.asm = test
image.jpg = image.jpg
foo.asm.cs = foo.asm.cs <-- Note: .Contains() & .Replace() would fail
You can use Path.GetFileNameWithoutExtension(filepath) to do it.
if (Path.GetExtension(stringValue) == anotherStringValue)
{
stringValue = Path.GetFileNameWithoutExtension(stringValue);
}
No need for the if(), just use :
stringValue = stringValue.Replace(anotherStringValue,"");
if anotherStringValue is not found within stringValue, then no changes will occur.
One more one-liner approach to getting rid of only the ".asm" at the end and not any "asm" in the middle of the string:
stringValue = System.Text.RegularExpressions.Regex.Replace(stringValue,".asm$","");
The "$" matches the end of the string.
To match ".asm" or ".ASM" or any equivlanet, you can further specify Regex.Replace to ignore case:
using System.Text.RegularExpresions;
...
stringValue = Regex.Replace(stringValue,".asm$","",RegexOptions.IgnoreCase);
Related
I have 3 possible input cases
string input = ""; // expected result: ""
string input = "bar-foo"; // expected result: "foo"
string input = "foo"; // expected result: "foo"
And I have to remove everyting including the first separator char - if exists.
Working approach:
string output = input.Split('-').LastOrDefault();
I want to solve this without Split() - my NOT working approach:
string output = input.Substring(input.IndexOf('-') );
How can I handle the IndexOutOfRangeException / make this code work?
Try to add 1:
string output = input.Substring(input.LastIndexOf('-') + 1);
If there's no - in the input, LastIndexOf returns -1 and so you'll have the entire string.
I've assumed that your are looking for input's suffix, that's why I've put LastIndexOf:
"123-456-789" -> "789"
If you want to cut off the prefix:
"123-456-789" -> "456-789"
please, change LastIndexOf into IndexOf
i think you should use Contains Method to identify - is available or not.
string a = "";
if (a.Contains("-"))
{
string output = input.Substring(input.LastIndexOf('-') + 1);
}
Why not just remove it from the string without checking:
input = input.Replace("-foo", string.Empty);
I have a text file that contain only the FULL version number of an application that I need to extract and then parse it into separate Variables.
For example lets say the version.cs contains 19.1.354.6
Code I'm using does not seem to be working:
char[] delimiter = { '.' };
string currentVersion = System.IO.File.ReadAllText(#"C:\Applicaion\version.cs");
string[] partsVersion;
partsVersion = currentVersion.Split(delimiter);
string majorVersion = partsVersion[0];
string minorVersion = partsVersion[1];
string buildVersion = partsVersion[2];
string revisVersion = partsVersion[3];
Altough your problem is with the file, most likely it contains other text than a version, why dont you use Version class which is absolutely for this kind of tasks.
var version = new Version("19.1.354.6");
var major = version.Major; // etc..
What you have works fine with the correct input, so I would suggest making sure there is nothing else in the file you're reading.
In the future, please provide error information, since we can't usually tell exactly what you expect to happen, only what we know should happen.
In light of that, I would also suggest looking into using Regex for parsing in the future. In my opinion, it provides a much more flexible solution for your needs. Here's an example of regex to use:
var regex = new Regex(#"([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9])");
var match = regex.Match("19.1.354.6");
if (match.Success)
{
Console.WriteLine("Match[1]: "+match.Groups[1].Value);
Console.WriteLine("Match[2]: "+match.Groups[2].Value);
Console.WriteLine("Match[3]: "+match.Groups[3].Value);
Console.WriteLine("Match[4]: "+match.Groups[4].Value);
}
else
{
Console.WriteLine("No match found");
}
which outputs the following:
// Match[1]: 19
// Match[2]: 1
// Match[3]: 354
// Match[4]: 6
I have a string
"\uploads\test1\test2.file"
What's the method to get just "test2.file"?
What I have in my mind is to get the last index of "\" and then perform a string.substring(last index of "\") command on it?
Is there a method that takes just the word after the last "\"?
Use the method Path.GetFileName(path); in System.IO namespace, it is much more elegant than doing string operations.
You could use LINQ:
var path = #"\uploads\test1\test2.file";
var file = path.Split('\\').Last();
You might want to validate the input, if you're concerned about path potentially being null or whatnot.
You could do something like this:
string path = "c:\\inetpub\\wwwrroot\\images\\pdf\\admission.pdf";
string folder = path.Substring(0,path.LastIndexOf(("\\")));
// this should be "c:\inetpub\wwwrroot\images\pdf"
var fileName = path.Substring(path.LastIndexOf(("\\"))+1);
// this should be admin.pdf
For more take a look at here How do I get the last part of this filepath?
Hope it helps!
You can use the Split method:
string myString = "\uploads\test1\test2.file";
string[] words = myString.Split("\");
//And take the last element:
var file = words[words.lenght-1];
using linq:
"\uploads\test1\test2.file".Split('\\').Last();
or you can do it without linq:
string[] parts = "\uploads\test1\test2.file".Split('\\');
last_part=parts[parts.length-1]
I am new in programming and not so good about regex. I wish to load / read a csv File and then save in a txt File using the same name of csv File. I will give an example.
D:\Project\File\xxx.csv
After I load this file, I want to get the name "xxx" and save it in a txt file:
D:\Project\File\xxx.txt
Or maybe in another folder, for example:
D:\Project\Specifications\PersonInfo.csv
save to
D:\Project\DataBank\PersonInfo.txt
This can be accomplished in many ways.
Maybe what you're lacking is knowledge of the System.IO.Path class (MSDN article here).
For instance changing the extension could be accomplished like so:
string originalFilePath = #"D:\Project\File\xxx.csv";
string newFilePath = Path.ChangeExtension(originalFilePath, ".txt");
Note: You need to explicitate the leading dot (".") for the extension.
Here's some "Path algebra" fun you could combine to create your desired effects:
string originalFilePath = #"D:\Project\File\xxx.csv";
string thePath = Path.GetDirectoryName(originalFilePath);
// will be #"D:\Project\File"
string filename = Path.GetFileName(originalFilePath);
// will be "xxx.csv"
string fileNameWithoutExtension = Path.GetFileNameWithoutExtension(originalFilePath);
// will be "xxx"
string recombinedFilePath = Path.Combine( #"D:\OtherFolder", "somethingElse.txt" );
// will be #"D:\OtherFolder\somethingElse.txt"
Note: Path.Combine knows how to handle extra/missing leading/trailing backslashes.
For example:
Path.Combine(#"D:\MyFolder1", #"MyFolder2\MyFile.txt")
Path.Combine(#"D:\MyFolder1\", #"MyFolder2\MyFile.txt")
Path.Combine(#"D:\MyFolder1", #"\MyFolder2\MyFile.txt")
Path.Combine(#"D:\MyFolder1\", #"\MyFolder2\MyFile.txt")
will all yield the same result: #"D:\MyFolder1\MyFolder2\MyFile.txt"
You do not need regex for that, because .NET provides a System.IO.Path class for dealing specifically with file name manipulations.
For example, to replace .csv with .txt you can use this call:
var csvPath = #"D:\Project\File\xxx.csv";
var txtPath = Path.Combine(
Path.GetDirectoryName(csvPath)
, Path.GetFileNameWithoutExtension(csvPath)+".txt"
);
You use a similar trick to replace other parts of the file path. Here is how you change the name of the top directory:
var csvPath = #"D:\Project\Specifications\xxx.csv";
var txtPath = Path.Combine(
Path.GetDirectoryName(Path.GetDirectoryName(csvPath))
, "DataBank"
, Path.GetFileNameWithoutExtension(csvPath)+".txt"
);
You don't need Regex.
You can use Path.GetFileName or Path.GetFileNameWithoutExtension:
string fileName = Path.GetFileNameWithoutExtension("D:\Project\Specifications\PersonInfo.csv");
If you want to use regex for this, this regex will get the part you want:
([^\\]+)\.[^.\\]+$
The first group (in the parentheses) matches one or more characters (as many as possible) which is not a backslash. Then there need to be a literal dot. Then one or more characters (as many as possible) that are not a dot or backslash, then the end of the string. The group captures the wanted part.
I have a file name dayhappy_02_02345.csv
How do I get the 02 part out to be used in a variable and also how do I get the 02345 part so that I can pass these 2 values into a variable for a function.
Using c#.
I have looked at GetFileName but this gets either the filename, the extention or the full file name only.
Thanks
Ste
For that specific file name,
string sData = "dayhappy_02_02345.csv";
string[] sArr = sData.split('_');
string sPart1 = sArr[1];
string sPart2 = sArr[2];
Will do, but that's a special case, will work only on file names of this type
Get the file name as you've already figured out, then use String.Split() to get the individual pieces.
You have to use Regex:
var match = new Regex(#".*_(\d+)_(\d+)").Match(Path.GetFileNameWithoutExtension(fileNAme));
var v02 = match.Groups[0].Value;
var v02345 = match.Groups[1].Value;