Reliable Directory.Exists using C#

Reliable Directory.Exists using C#

By : Dragnnight
Date : November 17 2020, 01:00 AM
should help you out You could try to create a DirectoryInfo object instead. The constructor should throw exceptions if the path is invalid or if the user does not have access. You would still have to check if it exists though.
code :
    var di = new DirectoryInfo(path);
        //The directory exists
        //The path is valid, but does not exist.
catch(Exception e)
    //The path is invalid or user does not have access.

Share : facebook icon twitter icon
nant directory::exists returns false even though directory exists

nant directory::exists returns false even though directory exists

By : user2768032
Date : March 29 2020, 07:55 AM
I hope this helps . I'm trying to check for if a directory exists as part of a NAnt script and getting a false negative. Here is the script fragment: , You must not use ${} in a nested way:
code :
<echo message="${backup.dir} --> ${directory::exists(backup.dir)}"/>
For a Ruby CLI, what is the most reliable way to change directory to users root/home directory?

For a Ruby CLI, what is the most reliable way to change directory to users root/home directory?

By : coder90
Date : March 29 2020, 07:55 AM
I wish did fix the issue. To summarize Avdi Grimm's screencast on the same subject,
If you're using a Ruby version greater than 1.9, the Dir module provides a method #home. However, this depends on the environment variable HOME set on the user's shell session. To reliably get the home dir, you should pass in the login name of the current user to the Dir.home command. Or, in code:
code :
# Works if HOME is set in the environment i.e., if "echo $HOME" returns the home directory
# when that command is run on the command-line
Dir.home     # => /Users/<username>, Works if HOME is set

# If the HOME environment variable is not set, you should explicitly pass in the username
# of the currently logged-in user
Dir.home(username)     # => /Users/<username>

# The current username can be obtained using
username = `whoami`

# or

require 'etc'
username = Etc.getlogin
ElasticSearch index exists not working / reliable

ElasticSearch index exists not working / reliable

By : Kiran Shetty
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , OK, I figured out a solution. Since the java client's calls are done asynchronously you have to use the variant which takes an action listener. The solution still gets a bit contrived though:
code :
// Inner class because it's just used to be thrown out of
// the action listener implementation to signal that the
// index exists
private class ExistsException extends RuntimeException {

public boolean exists() {
    logger.info(String.format("Verifying existence of index \"%s\"", indexName));
    IndicesExistsRequest request = new IndicesExistsRequest(indexName);
    try {
        adminClient.exists(request, new ActionListener<IndicesExistsResponse>() {
            public void onResponse(IndicesExistsResponse response) {
                if (response.isExists()) {
                    throw new ExistsException();
            public void onFailure(Throwable e) {
    catch (ExistsException e) {
        return true;
    return false;
Reliable check if a variable exists in R

Reliable check if a variable exists in R

By : Root Tn
Date : March 29 2020, 07:55 AM
To fix this issue I figured it out. It is a wrapper around try, which is itself a wrapper for tryCatch. Here is the function:
code :
#this tries to evaluate the expression and returns it, but if it does not work, returns the alternative value. It is simply a wrapper for trycatch. 
#This is similar to python's try except
#This will return the value of  the_matrix [[1]][i,3], unless it does not exist, in which case it will return zero

tryExcept <- function(expr,alternative)
    tryCatch(expr,error=function(e) alternative)
FileInfo.Exists not reliable with UNC path

FileInfo.Exists not reliable with UNC path

By : Daniel Hiberus
Date : March 29 2020, 07:55 AM
will be helpful for those in need You can't do this in a general sense, because as Ben mentions, you might not have ACLs to see if it exists. That being said, the best way to determine if a file exists (based on your scenario) is to attempt to open the file
Related Posts Related Posts :
  • How to use Addfields in MongoDB C# Aggregation Pipeline
  • MsTest TestCleanup method not called when an unhandled exception is thrown
  • missing last data when exporting gridview to excel
  • How to add array of objects to List in c#
  • Lambda Expression to order (sort) my list collection
  • Library for displaying music notation
  • How to compare two dictionaries in c# and get the output as True and False after validation
  • specify fields to be serialized with JSON
  • How do you obtain the content of a specific node using XmlDocument in C#?
  • How to ignore the first line in a csv file when you read the csv file in C#
  • c# - Problem calling public void from class
  • How to tell a class which objects it should create? Type vs. object confusion :(
  • Save CheckBox state to xml
  • WIX CAQuietExec NETSH Command Fails
  • Issues sending http put request every 60 seconds to RoR app
  • ConfigurationManager.ConnectionStrings.ConnectionString Issue
  • Real size WPF controls for printing
  • How to cancel properly?
  • C# String multiplication error
  • Using Solrnet and Assigning Attributes with Entity Framework Generated POCOs
  • Regex pattern for single backslash
  • TextBox: insert spaces for credit card number?
  • C# DLL loaded for exe-application is not found when launching similar DLL by rundll32.exe
  • Debug a Windows Service with WCF library
  • Open a file from an external assembly?
  • Servicestack RegistrationFeature Unable to bind request
  • Index was outside the bounds of the array confusion
  • Error in Xml to List code. The ':' character, hexadecimal value 0x3A, cannot be included in a name
  • I am trying to do a while loop with a string conditional statement in C#
  • C# 'Cannot access a disposed object. Object name: 'SslStream'.'
  • How to make Gecko use seperate CookieContainer per instance?
  • C# Advanced form "please wait"
  • Send and Receive data C# using network stream
  • How to discover that appsettings changed in C#?
  • Check what needs full trust
  • What is the execution order of an MVC Razor view/layout
  • Table designer (Entity Framework) is too resource intense
  • How to clean up an exception string so it can be displayed via Javascript Alert?
  • Configuring Amazon SES Feedback Notifications via Amazon SNS in ASP.NET MVC (C#)
  • C# api responce and request
  • Dynamodb putitem function not working properly
  • theme in windows phone(light or dark) using c#
  • Backup attached database file(.mdf) using c# and SQL Server
  • What is 'TextFile' and where it is uses in WPF project
  • Using same alias for multiple namespaces
  • how to move mails into separate folders
  • Multithreaded Uploader
  • Memory fragmentation?
  • C# correct exception handling
  • "Could not open macro storage" when accessing using file on another machine
  • How to access other directories of hosted server
  • C# Jagged Array check if value exists/true
  • Why can't I type Clone() properly?
  • exception on accessing dictionary from list
  • Getting the immediate response from server without waiting to 200 message
  • Why am I getting exception Directory Is Not empty?
  • Could not load file or assembly 'CefSharp.dll' or one of its dependencies
  • Sending Email By Using C# in unity3D?
  • Correct usage of await async in webapi
  • Program update code issue
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org