I have to do a directory search and map it to the ui as a tree structure. I will explain my problem with the following structure
Root directory has --> [dir1] [dir2] [dir3].....[nth dir] (Note there will be only directories and no files)
[dir1] has --> [dir1a] [dir1b] [dir1c]....[nth dir1] (Note there will be only directories and no files)
[dir1a] has --> [1dir] [2dir] [3dir] (Not there will be only directories and no files)
[1dir] has --> some files and directories
so what I need here is the name of the directories till the directory that has files in it
In the above case that would be dir1/dir1a/1dir
I want to scan all the directories that only has directories in it and no files. I need the full path to the directories that has files in it.
I have tried the directory.enumeratedirectories and directoryinfo in a foreach but i think i might be going on the wrong path.
Any ideas how can I scan all the directories and get path to the directory that has files in it.
public void FindDirectoriesWithFiles(List<string> paths, DirectoryInfo workingDir)
{
// if this directory has files in it, add its path to the list.
if (workingDir.GetFiles().Length > 0)
{
paths.Add(workingDir.FullName);
}
else
{
// Else, this directory has no files, so iterate through its children.
foreach (var childDir in workingDir.GetDirectories())
{
FindDirectoriesWithFiles(paths, childDir);
}
}
}
Invoke the method above as follows:
var paths = new List<string>();
FindDirectoriesWithFiles(paths, new DirectoryInfo(#"C:\"));
// 'paths' now contains the folders you're looking for.
Note that this solution stops searching subfolders of folders that contain files. For example, if C:\Dir1\Dir1a\Dir1b has files in it, but it also has subfolders in it (e.g. C:\Dir1\Dir1a\Dir1b\Dir1c), those subfolders (Dir1c in this example) would not be searched.
Related
I'm using below code to make a copy a folder available on a network. This folder has, subfolders and files with total of 455 files and 13 folders and of size 409 MB.
My method is recursively calling itself to create a copy of sub folders and files in it. Overall, this method is taking more than 10 minutes to finish the task and I'm looking to speed up the process.
So far, I've went through different posts but did not find any better solution. Is there a better way to achieve my task or any improvements to my code for a faster execution?
void CopyDirectoryAndFiles(string sourceDirectory, string destinationDirectory, bool recursive)
{
// Get information about the source directory
var dir = new DirectoryInfo(sourceDirectory);
// Check if the source directory exists
if (!dir.Exists)
throw new DirectoryNotFoundException($"Source directory not found:dir.FullName}");
// Cache directories before we start copying
DirectoryInfo[] dirs = dir.GetDirectories();
// Create the destination directory
Directory.CreateDirectory(destinationDirectory);
// Get the files in the source directory and copy to the destination directory
foreach (FileInfo file in dir.GetFiles())
{
string targetFilePath = Path.Combine(destinationDirectory, file.Name);
file.CopyTo(targetFilePath);
}
// If recursive and copying subdirectories, recursively call this method
if (recursive)
{
foreach (DirectoryInfo subDir in dirs)
{
string newDestinationDirectory= Path.Combine(destinationDirectory,subDir.Name);
CopyDirectoryAndFiles(subDir.FullName, newDestinationDirectory, true);
}
}
}
Thanks for your help.
I don't think there's a way to increase performance in a drastic way, but I can suggest a few things to try:
replace foreach w/ Parallel.ForEach to copy data in several streams;
you can use an external tool (e.g. xcopy), which is optimized for the task, and call this tool from your C# code. xcopy can copy folders recursively if you specify the /e flag.
How do I get all *.txt files from a folder path to an array where I only want to get all the *.txt files from that specificly belong to a sub-directory called TXT.
I have tried
string[] txtFiles = Directory.GetFiles(#"D:\MyFiles", "*.txt");
But the above code gets all *.txt files in the given directory instead of those that are in the sub-folder named TXT?
The folders inside MyFiles look like below:
152-10-11
30-124-12
....
Where each of the folders 152-10-11 has sub-folders like 152\10\11\TXT
You can search for a specific directory using (assuming that you only have one directory that starts with "TXT"):
string[] txtDir = Directory.GetDirectories(#"D:\", "TXT*");
You could then use that result to get the files:
string[] txtFiles = Directory.GetFiles(txtDir[0], "*.txt");
I have a root node A which contains B which contains C which contains D which contains an XML file abc.xml
So in D:\ drive ,I have the following structure of directories A>>B>>C>>D.
This path is dynamic. What is the best practice to read the file abc.xml in C# by iterating through the physical folders?
You could implement a recursive search algorithm that goes through all the folders and descends into the sub folders.
Pseudo Code:
public void GetXMLFilesRecursive(string currentFolder, List<string> results)
{
// Enumerate all directories of currentFolder
string[] folders = Directory.GetDirectories(currentFolder);
foreach (string folder in folders)
GetXMLFilesRecursive(folder, results));
// Enumerate all XML files in this folder only if it has no other sub-folders (is a leaf)
if (folders.Length == 0)
{
string[] xmlFiles = Directory.GetFiles(currentFolder, "*.xml");
results.AddRange(xmlFiles);
}
}
This method only returns XML files in the lowest folders of the hierarchy (i.e. folders that don't have sub folders). If you want all files you find along the way, comment out if (folders.Length == 0). On the other hand, you could then also use Directory.GetFiles with SearchOption.AllDirectories.
Why I wrote a recursive algorithm: The OP asked how to find all XML files in the leaf directories. You can not do that using Directory.GetFiles with SearchOption.AllDirectories, but you then need to implement the above.
You can use Directory.GetFiles(d, "*.xml",SearchOption.AllDirectories) to get all the xml files get what you are looking for.
You can search an entire tree for a file using Directory.GetFiles(path,searchPattern,SearchOption) or Directory.EnumerateFiles with SearchOption.AllDirectories, eg
var fullPaths=Directory.GetFiles(myPath,"abc.xml",SearchOption.AllDirectories)
You can also use the DirectoryInfo class to get full FileInfo instances instead of just the paths, with access to file properties and attributes:
var myDir=new DirectoryInfo(myPath);
var fileInfos=myDir.GetFiles("abc.xml",SearchOption.AllDirectories);
The difference between the GetFiles and EnumerateFiles methods is that the first returns an array with all the files found, blocking until it finds all of them. EnumerateFiles on the other hand returns results as it finds them, so you get to process the results much sooner.
What goes for GetFiles goes for the GetDirectories/EnumerateDirectories set of functions as well. The methods are available both from the Directory and DirectoryInfo class.
If you want to search for both directories and files, you can use GetFileSystemEntries/EnumerateFileSystemEntries to return both of them with a single call. The equivalent DirectoryInfo methods are GetFileSystemInfos/EnumerateFileSystemInfos
public List<string> getFiles(string path, string searchPattern, List<string> list)
{
try
{
foreach (string folder in Directory.GetDirectories(path))
getFiles(folder, searchPattern, list);
list.AddRange(Directory.GetFiles(path, searchPattern));
}
catch (UnauthorizedAccessException)
{
//Do not have access to the file.
}
return list;
}
Call like this:
//Get all xml files in the D drive:
List<string> files = getFiles(#"d:\", "*.xml", new List<string>());
I have a custom object that contains methods that returns all directory and file names in a root
string[] dirlist = obj.GetDirectories();
//which returns all dir names in root
string[] filelist = obj.GetFiles();
//which return all file names in root
I cannot modify these methods. Once I get the dirlist, how do i get a list of all subdirs in it as well as files in the subdirs, ignoring the security exceptions. It can be nested to multiple levels. Anything in .NET 4?
Update: string[] dirList can also be read as List dirlist. Please give a solution that uses the latest features of .NET
DirectoryOne
- SubDirOne
- SubDirTwo
- FileOne
- FileTwo
- SubDirThree
DirectoryTwo
DirectoryOne
There are already built-in .NET methods to do this:
// get all files in folder and sub-folders
Directory.GetFiles(path, "*", SearchOption.AllDirectories);
// get all sub-directories
Directory.GetDirectories(path, "*", SearchOption.AllDirectories);
Somehow I get the feeling this isn't the solution you're looking for though.
Update:
I think I may know what you're trying to ask, since you tagged it as LINQ. If you want to get a list of all sub-directories and sub-folders given a list of directories, you can use the following code:
// get all files given a collection of directories as a string array
dirList.SelectMany(x => Directory.GetFiles(x, "*", SearchOption.AllDirectories));
// get all sub-directories given a collection of directories as a string array
dirList.SelectMany(x => x.Directory.GetDirectories(x, "*", SearchOption.AllDirectories));
Have a look at the Directory Class
foreach(string dir in Directory.GetDirectories("c:\","",SearchOption.AllDirectories))
{
Console.Writeline(dir);
foreach(string file in Directory.GetFiles(dir))
{
Console.Writline(file);
}
}
This will print all directories under C:\ and then all the files in each of those directories.
Does that help?
I am using Team foundation system and I have requirement in which I want to copy all the checkout files to a local folder along with the same folder structure using C#. How can I do that?
I don't know what you mean by the "checkout files", but if you want to copy a directory you have to:
Recursively enumerate all of the files and folders in the top-level directory.
For each item that you enumerate, either create the folder in the destination directory, or copy the source file to the destination directory hierarchy.
The following will enumerate all of the files and folders in a directory:
static void FullDirList(DirectoryInfo dir, string searchPattern)
{
Console.WriteLine("Directory {0}", dir.FullName);
// list the files
foreach (FileInfo f in dir.GetFiles(searchPattern))
{
Console.WriteLine("File {0}", f.FullName);
}
// process each directory
foreach (DirectoryInfo d in dir.GetDirectories())
{
FullDirList(d, searchPattern);
}
}
If you call that with FullDirList("C:\MyProject\", *.*), it will enumerate all of the files.
To create destination folders or copy files, change the calls to Console.WriteLine so that they do the appropriate thing. All you should have to change in the destination file or folder names is the root folder name (that is, if you're copying from C:\MyProject\ to C:\MyProjectCopy\, then the destination files are just f.FullName with the C:\MyProject\ replaced by C:\MyProjectCopy).