I have a path in my network who I can use in File Explorer without problems:
\\MyNetwork\Projects\16000
Now I want to access it using Directory.Exists as:
var normalFolderPath = #"\MyNetwork";
var number = #"\16000"
var a = Directory.Exists($#"{normalFolderPath}\{number}");
But this: $#"{normalFolderPath}\{number}" return \\MyNetwork\\16000 but if I try to access it that on File Explorer just can not found, but if I remove \ from subfolder like: \\MyNetwork\16000 it works!, how can I remove one \ from string in c#
You're complaining that your string has two slashes in the middle of it, but you put two slashes in the middle of it:
number is the literal string \16000
You asked c# to concatenate normalfolderpath with number, separated by slash: {normalFolderPath}\{number}
Naturally, you'll end up with two slashes; one from number, and one as the separator. To demo what I mean, here is an altered code:
var normalFolderPath = #"\MyNetwork";
var number = #"!16000"
var a = Directory.Exists($#"{normalFolderPath}={number}");
This will produce the string \MyNetwork=!16000: the = is the separator between the interpolated fields and ! came from the start of number
But this: $#"{normalFolderPath}\{number}" return \\MyNetwork\\16000
I disagree: it will definitely return \MyNetwork\\16000 with only one slash at the start and two in the middle. No way will that code you put, return something with two slashes at the start
As has been commented, you should use Path.Combine to combine path elements:
var normalFolderPath = #"\\MyNetwork";
var number = "16000"
var a = Directory.Exists(Path.Combine(normalFolderPath,number));
Related
I am trying to get the package name from the file name using C# and Regex. This is my attempt so far which works, but I am wondering if is there a more elegant way.
Given for example, az.accounts.2.10.4.nupkg I want to get az.accounts
My attempt:
var filename = Path.GetFileNameWithoutExtension(nupkgPackagePath);
var nupkgPackageGetModulePath = Regex.Matches(filename, #"[^\d]+").First().Value.TrimEnd('.'));
Test cases:
$ ls *.nupkg
PowerShellGet.nupkg az.iothub.2.7.4.nupkg
az.9.2.0.nupkg az.keyvault.4.9.1.nupkg
az.accounts.2.10.4.nupkg az.kusto.2.1.0.nupkg
az.advisor.2.0.0.nupkg az.logicapp.1.5.0.nupkg
az.aks.5.1.0.nupkg az.machinelearning.1.1.3.nupkg
az.analysisservices.1.1.4.nupkg az.maintenance.1.2.1.nupkg
az.apimanagement.4.0.1.nupkg az.managedserviceidentity.1.1.0.nupkg
az.appconfiguration.1.2.0.nupkg az.managedservices.3.0.0.nupkg
az.applicationinsights.2.2.0.nupkg az.marketplaceordering.2.0.0.nupkg
az.attestation.2.0.0.nupkg az.media.1.1.1.nupkg
az.automation.1.8.0.nupkg az.migrate.2.1.0.nupkg
az.batch.3.2.1.nupkg az.monitor.4.3.0.nupkg
az.billing.2.0.0.nupkg az.mysql.1.1.0.nupkg
az.cdn.2.1.0.nupkg az.network.5.2.0.nupkg
az.cloudservice.1.1.0.nupkg az.notificationhubs.1.1.1.nupkg
az.cognitiveservices.1.12.0.nupkg az.operationalinsights.3.2.0.nupkg
az.compute.5.2.0.nupkg az.policyinsights.1.5.1.nupkg
az.confidentialledger.1.0.0.nupkg az.postgresql.1.1.0.nupkg
az.containerinstance.3.1.0.nupkg az.powerbiembedded.1.2.0.nupkg
az.containerregistry.3.0.0.nupkg az.privatedns.1.0.3.nupkg
az.cosmosdb.1.9.0.nupkg az.recoveryservices.6.1.2.nupkg
az.databoxedge.1.1.0.nupkg az.rediscache.1.6.0.nupkg
az.databricks.1.4.0.nupkg az.redisenterprisecache.1.1.0.nupkg
az.datafactory.1.16.11.nupkg az.relay.1.0.3.nupkg
az.datalakeanalytics.1.0.2.nupkg az.resourcemover.1.1.0.nupkg
az.datalakestore.1.3.0.nupkg az.resources.6.5.0.nupkg
az.dataprotection.1.0.1.nupkg az.security.1.3.0.nupkg
az.datashare.1.0.1.nupkg az.securityinsights.3.0.0.nupkg
az.deploymentmanager.1.1.0.nupkg az.servicebus.2.1.0.nupkg
az.desktopvirtualization.3.1.1.nupkg az.servicefabric.3.1.0.nupkg
az.devtestlabs.1.0.2.nupkg az.signalr.1.5.0.nupkg
az.dns.1.1.2.nupkg az.sql.4.1.0.nupkg
az.eventgrid.1.5.0.nupkg az.sqlvirtualmachine.1.1.0.nupkg
az.eventhub.3.2.0.nupkg az.stackhci.1.4.0.nupkg
az.frontdoor.1.9.0.nupkg az.storage.5.2.0.nupkg
az.functions.4.0.6.nupkg az.storagesync.1.7.0.nupkg
az.hdinsight.5.0.1.nupkg az.streamanalytics.2.0.0.nupkg
az.healthcareapis.2.0.0.nupkg az.support.1.0.0.nupkg
You can try something like this:
string text = "az.streamanalytics.2.0.0.nupkg";
var result = Regex
.Match(text, #"(?<name>[a-zA-Z0-9.]+?)(\.[0-9]+)*\.nupkg$")
.Groups["name"]
.Value;
Pattern explained:
(?<name>[a-zA-Z0-9.]+?) - letters, digits, dots as few as possible
(in order do not match version part)
(\.[0-9]+)* - zero or more version part: . followed by digits
\.nupkg - .nupkg
$ - end of string
Fiddle
^[^.]*\.[^.]*
You can test it out at https://regex101.com/
using System.Text.RegularExpressions;
// ...
string filename = "az.accounts.2.10.4.nupkg";
string pattern = #"^[^.]*\.[^.]*";
string nupkgPackageGetModulePath = Regex.Match(filename, pattern).Value;
// nupkgPackageGetModulePath is now "az.accounts"
You've got two different input formats
<PackageName>.nupkg
<PackageName>.<Major>.<Minor>.<Patch>.nupkg
Your current attempt:
Regex.Matches(fileName, #"[^\d]+").First().Value.TrimEnd('.')
This actually doesn't work for an input of "PowerShellGet.nupkg". To explain how this code works.
Starting at the beginning of the string, find the first non-digit character, and greedily include all other consecutive non-digit characters. This is the "matched text"
If the matched text ends with a period, take off that period.
This works fine if your input has a number in it, but "PowerShellGet.nupkg" doesn't, hence nupkgPackageGetModulePath in your code example will be the full file name not "PowerShellGet".
This will also be a huge problem if the package name itself contains a digit. How about "runtime.opensuse.13.2-x64.runtime.native.System.Security.Cryptography.OpenSsl.4.3.3.nupkg", or (and I can't believe this is actually a package) "2.2.0.0.nupgk".
It's not a good idea to find the first non-digit. Instead, work with the expected format of nuget packages.
Using string.Split:
Split the input by periods. If there's two elements in the resulting array, it's the first format and return the first element of the array. If there's at least 5 elements in the array, it's the second format. Otherwise, the format is unknown.
private static string GetPackageName(string packageFileName)
{
var segments = packageFileName.Split('.');
return segments.Length switch
{
2 => segments[0],
>= 5 => string.Join(".", segments[..^4]),
_ => throw new Exception("Unknown what you want done here")
};
}
segments[..^4] is a handy way to get all the element(s) before the major version.
https://dotnetfiddle.net/Ok6jbq
Using Regex:
Again, because you've got two different formats you've got to account for both so this gets a bit more complicated.
([\S]+?)(?:\.\d+\.\d+\.\d+)?\.nupkg
The middle section ((?:\.\d+\.\d+\.\d+)?) is a non-capture group (starts with ?:) which is optional (suffixed with ?).
Capture group 1 will have the package name.
https://regexr.com/74mgf
So I have this string which I have to trim and manipulate a little with it.
My string example:
string test = "studentName_123.pdf";
Now, what I want to do is somehow extract only the _123 part and at the end I need to have studentName.pdf
What I have tried:
string test_extracted = test.Substring(0, test.LastIndexOf("_") )+".pdf";
This also works but the thing is that I don't want to add the ".pdf" suffix at the end of the string manually because I can have strings that are not pdf, for ex. studentName.docx , studentName.png.
So basically I just want the "_123" part removed but still keep the remain part after that.
I think this might help you:
string test = "studentName_123.pdf";
string test_extracted = test.Substring(0, test.LastIndexOf("_") )+ test.Substring(test.LastIndexOf("."),test.Length - test.LastIndexOf(".") );
Using Remove(int startIndex, int count):
string test = "studentName_123.pdf";
string test_extracted = test.Remove(test.LastIndexOf("_"), test.LastIndexOf(".") - test.LastIndexOf("_"));
Sounds like you mean something like this?
string extension = Path.GetExtension(test);
string pdfName = Path.GetFileNameWithoutExtension(test).Split('_')[0];
string fullName = pdfName + extension;
Since you know what value you will always be replacing in your strings, "_123", to base on your example, just utilize the replace method and replace it with nothing since the method expects two arguments;
string test_extracted = test.replace('_123', '');
This could be solved with a regular expression like this
(\w*)_.*(\.\w*) where the first capture group (\w*) matches everything before the underscore and the second group (\.\w*) matches the file extensions.
Lastly we just have to concat the groups without the stuff inbetween like so:
string test = "studentName_123.pdf";
var regex = Regex.Match(test, #"(\w*)_.*(\.\w*)");
string newString = regex.Groups[1].Value + regex.Groups[2].Value;
Basically what I'm trying to do is find the first string that starts with "/Game/Mods" but the problem is how do i tell the program where to end the string? here's an example what a string can look like: string example
As you can see the string starts with "/Game/Mods", i want it to end after the word "TamingSedative", the problem is that the ending word (TamingSedative)is different for every file it has to check, for example: example 2
There you can see that the ending word is now "WeapObsidianSword" (instead of TamingSedative) so basically the string has to end when it comes across the "NUL" but how do i specify that in c# code?
This a simple example using Regex.
Dim yourString As String = "/Game/Mods/TamingSedative/PrimalItemConsumable_TamingSedative"
Dim M As System.Text.RegularExpressions.Match = System.Text.RegularExpressions.Regex.Match(yourString, "/Game/Mods/(.+?)/")
MessageBox.Show(M.Groups(0).Value) 'This should show /Game/Mods/TamingSedative/
MessageBox.Show(M.Groups(1).Value) 'This should show TamingSedative
Since you need only the first occurance, this is the simplest solution I could think of:
(In case you cannot see the image, click on it to open in new tab)
EDIT:
In case the existence of a path like this is not guaranteed in the string, you can do an additional check before proceeding to use Substring, like this:
int exists = fullString.IndexOf("/Game/Mods");
if (exists == -1) return null;
Note: I have included "ENDED" in order to see in case any NULL chars have been included (white spaces)
From your comments: "the string just has to start at /Game/Mods and end when it reaches the whitespace".
In that case, you can easily get the matches using Linq, like this (assuming filePath is a string that has the path to your file):
var text = File.ReadAllText(filePath);
var matches = text.Split(null).Where(s => s.StartsWith("/Game/Mods"));
And, if you only need the first occurrence, it would be:
var firstMatch = matches.Any() ? matches.First() : null;
Check this post.
I'm currently trying to strip a string of data that is may contain the hyphen symbol.
E.g. Basic logic:
string stringin = "test - 9894"; OR Data could be == "test";
if (string contains a hyphen "-"){
Strip stringin;
output would be "test" deleting from the hyphen.
}
Console.WriteLine(stringin);
The current C# code i'm trying to get to work is shown below:
string Details = "hsh4a - 8989";
var regexItem = new Regex("^[^-]*-?[^-]*$");
string stringin;
stringin = Details.ToString();
if (regexItem.IsMatch(stringin)) {
stringin = stringin.Substring(0, stringin.IndexOf("-") - 1); //Strip from the ending chars and - once - is hit.
}
Details = stringin;
Console.WriteLine(Details);
But pulls in an Error when the string does not contain any hyphen's.
How about just doing this?
stringin.Split('-')[0].Trim();
You could even specify the maximum number of substrings using overloaded Split constructor.
stringin.Split('-', 1)[0].Trim();
Your regex is asking for "zero or one repetition of -", which means that it matches even if your input does NOT contain a hyphen. Thereafter you do this
stringin.Substring(0, stringin.IndexOf("-") - 1)
Which gives an index out of range exception (There is no hyphen to find).
Make a simple change to your regex and it works with or without - ask for "one or more hyphens":
var regexItem = new Regex("^[^-]*-+[^-]*$");
here -------------------------^
It seems that you want the (sub)string starting from the dash ('-') if original one contains '-' or the original string if doesn't have dash.
If it's your case:
String Details = "hsh4a - 8989";
Details = Details.Substring(Details.IndexOf('-') + 1);
I wouldn't use regex for this case if I were you, it makes the solution much more complex than it can be.
For string I am sure will have no more than a couple of dashes I would use this code, because it is one liner and very simple:
string str= entryString.Split(new [] {'-'}, StringSplitOptions.RemoveEmptyEntries)[0];
If you know that a string might contain high amount of dashes, it is not recommended to use this approach - it will create high amount of different strings, although you are looking just for the first one. So, the solution would look like something like this code:
int firstDashIndex = entryString.IndexOf("-");
string str = firstDashIndex > -1? entryString.Substring(0, firstDashIndex) : entryString;
you don't need a regex for this. A simple IndexOf function will give you the index of the hyphen, then you can clean it up from there.
This is also a great place to start writing unit tests as well. They are very good for stuff like this.
Here's what the code could look like :
string inputString = "ho-something";
string outPutString = inputString;
var hyphenIndex = inputString.IndexOf('-');
if (hyphenIndex > -1)
{
outPutString = inputString.Substring(0, hyphenIndex);
}
return outPutString;
I am trying find a string in below string.
http://example.com/TIGS/SIM/Lists/Team Discussion/DispForm.aspx?ID=1779
by using http://example.com/TIGS/SIM/Lists string. How can I get Team Discussion word from it?
Some times strings will be
http://example.com/TIGS/SIM/Lists/Team Discussion/DispForm.aspx?ID=1779
I need `Team Discussion`
http://example.com/TIGS/ALIF/Lists/Artifical Lift Discussion Forum 2/DispForm.aspx?ID=8
I need `Artifical Lift Discussion Forum 2`
If you're always following that pattern, I recommend #Justin's answer. However, if you want a more robust method, you can always couple the System.Uri and Path.GetDirectoryName methods, then perform a String.Split. Like this example:
String url = #"http://example.com/TIGS/SIM/Lists/Team Discussion/DispForm.aspx?ID=1779";
System.Uri uri = new System.Uri(url);
String dir = Path.GetDirectoryName(uri.AbsolutePath);
String[] parts = dir.Split(new[]{ Path.DirectorySeparatorChar });
Console.WriteLine(parts[parts.Length - 1]);
The only major problem, however, is you're going to wind up with a path that's been "encoded" (i.e. your space is now going to be represented by a %20)
This solution will get you the last directory of your URL regardless of how many directories are in your URL.
string[] arr = s.Split('/');
string lastPart = arr[arr.Length - 2];
You could combine this solution into one line, however it would require splitting the string twice, once for the values, the second for the length.
If you wanted to see a regular expression example:
string input = "http://example.com/TIGS/SIM/Lists/Team Discussion/DispForm.aspx?ID=1779";
string given = "http://example.com/TIGS/SIM/Lists";
System.Text.RegularExpressions.Regex regex = new System.Text.RegularExpressions.Regex(given + #"\/(.+)\/");
System.Text.RegularExpressions.Match match = regex.Match(input);
Console.WriteLine(match.Groups[1]); // Team Discussion
Here's a simple approach, assuming that your URL always has the same number of slashes before the are you want:
var value = url.Split(new[]{'/'}, StringSplitOptions.RemoveEmptyEntries)[5];
Here is another solution that provides the following advantages:
Does not require the use of regular expressions.
Does not require a certain 'count' of slashes be present (indexing based of a specific number). I consider this a key benefit because it makes the code less likely to fail if some part of the URL changes. Ultimately it is best to base your parsing logic off which part of the text's structure you consider least likely to change.
This method, however, DOES rely on the following assumptions, which I consider to be the least likely to change:
URL must have "/Lists/" right before target text.
URL must have "/" right after target text.
Basically, I just split the string twice, using text that I expect to be surrounding the area I am interested in.
String urlToSearch = "http://example.com/TIGS/SIM/Lists/Team Discussion/DispForm.aspx";
String result = "";
// First, get everthing after "/Lists/"
string[] temp1 = urlToSearch.Split(new String[] { "/Lists/" }, StringSplitOptions.RemoveEmptyEntries);
if (temp1.Length > 1)
{
// Next, get everything before the first "/"
string[] temp2 = temp1[1].Split(new String[] { "/" }, StringSplitOptions.RemoveEmptyEntries);
result = temp2[0];
}
Your answer will then be stored in the 'result' variable.