console application c# - search for a file

Question

I'm trying to build a c# console application that will search for a file in the fileDictionary. So far I have:

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO;   namespace ConsoleApplication1 {     class Program {         static void Main(string[] args) {               //read the file system contents             DirectoryInfo directoryInfo = new DirectoryInfo(@"C:\Users\dillonm\Documents");             FileInfo[] fileNames = directoryInfo.GetFiles("*.*");             Dictionary<int, string> fileDictionary = new Dictionary<int, string>();               //store the files             for (int i = 0; i < fileNames.Length; i++) {                 //foreach(System.IO.FileInfo fi in fileNames){                 fileDictionary.Add(i, fileNames[i].FullName);             }               //get user input             Console.WriteLine("Enter the file name: ");             Console.ReadLine();               //search!             }     } }

But I'm stuck. I have been searching online for an example, an answer, but to no avail.
Thanks in advance for your help!

Vulpes · Answer

The following code should allow for partial matches as well as full matches: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { //read the file system contents DirectoryInfo directoryInfo = new DirectoryInfo(@"C:\Users\dillonm\Documents"); FileInfo[] fileNames = directoryInfo.GetFiles("*.*"); Dictionary fileDictionary = new Dictionary (); //store the files for (int i = 0; i { // use Name here so user doesn't need to enter full path of file for a full match fileDictionary.Add(i, fileNames[i].Name); } //get user input string fileToFind; do { Console.WriteLine("Please enter the full or partial file name: "); fileToFind = Console.ReadLine().Trim(); } while(fileToFind == ""); //search! string[] foundFiles = fileDictionary.Values.Where(s => s.Contains(fileToFind)).ToArray(); if (foundFiles.Length > 0) { Console.WriteLine("Found {0} File(s) as follows :
", foundFiles.Length); foreach(string foundFile in foundFiles) Console.WriteLine(" {0}", foundFile); } else { Console.WriteLine("No files found."); } Console.WriteLine("
Press enter to exit."); Console.ReadLine(); } } }

mohammadreza mostafaei · Answer

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace Project { static class FileUtility { public static void Search(string folderPath, string keyword) { try { string[] files = Directory.GetFiles(folderPath); foreach (string f in files) { if (Path.GetFileNameWithoutExtension(f).Contains(keyword) ) { Console.WriteLine(">> {0}", f); } } } catch (Exception) { Console.WriteLine("# Error: can not open folder : {0}", folderPath); } try { string[] folders = Directory.GetDirectories(folderPath); foreach (string f in folders) { Search(f, keyword); } } catch (Exception) { Console.WriteLine("# Error: can not open folder : {0}", folderPath); } } } } bud you shoud make other class for override my FileUtility class.

mary jane · Answer

you're awesome!! i'm still new to this so i'm learning. thank you for your help i really appreciate it :)

Vulpes · Answer

Here's a version of the same program which uses an array rather than a dictionary to store the filenames. I've also taken the opportunity to make the searching case-insensitive (by converting to lower case) as this can be a troublesome aspect in searching routines. It's better to use an array (or list) as these are simpler and use less memory than a dictionary and keyed (as opposed to indexed) access is not required in this program. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { //read the file system contents //DirectoryInfo directoryInfo = new DirectoryInfo(@"C:\Users\dillonm\Documents"); DirectoryInfo directoryInfo = new DirectoryInfo(@"D:\foxsoft\cs3"); FileInfo[] fileNames = directoryInfo.GetFiles("*.*"); string[] fileArray = new string[fileNames.Length]; //store the files for (int i = 0; i { // use Name here so user doesn't need to enter full path of file fileArray[i] = fileNames[i].Name; } //get user input string fileToFind; do { Console.WriteLine("Please enter the full or partial file name: "); fileToFind = Console.ReadLine().Trim().ToLower(); } while(fileToFind == ""); //search! string[] foundFiles = fileArray.Where(s => s.ToLower().Contains(fileToFind)).ToArray(); if (foundFiles.Length > 0) { Console.WriteLine("Found {0} File(s) as follows :
", foundFiles.Length); foreach(string foundFile in foundFiles) Console.WriteLine(" {0}", foundFile); } else { Console.WriteLine("No files found."); } Console.WriteLine("
Press enter to exit."); Console.ReadLine(); } } }

mary jane · Answer

vulpes, out of curiosity, how would you do it with an array or list? and why would that way be better??

mary jane · Answer

Perfect!!! Thank you so much :)

mary jane · Answer

Ok so that worked almost perfect!! Thanks vulpes! So what if I wanted to use a partial of a file name and return multiple files? ie, "vod" return all files with the word in it.

Vulpes · Answer

Try it like this: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { //read the file system contents DirectoryInfo directoryInfo = new DirectoryInfo(@"C:\Users\dillonm\Documents"); FileInfo[] fileNames = directoryInfo.GetFiles("*.*"); Dictionary fileDictionary = new Dictionary (); //store the files for (int i = 0; i { // use Name here so user doesn't need to enter full path of file fileDictionary.Add(i, fileNames[i].Name); } //get user input string fileToFind; do { Console.WriteLine("Please enter the file name: "); fileToFind = Console.ReadLine().Trim(); } while(fileToFind == ""); //search! string foundFile = fileDictionary.Values.Where(s => s == fileToFind).FirstOrDefault(); if (foundFile != null) { Console.WriteLine("Found {0}", foundFile); } else { Console.WriteLine("File not found."); } Console.WriteLine("
Press enter to exit."); Console.ReadLine(); } } } I'm not sure why you're using a Dictionary rather than an array or List to store the filenames but I've ignored that for now.

mary jane · Answer

Ok. so i added it in but its not printing the file path and file name. Here's my full code: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace ConsoleApplication1 { class Program { static void Main( string [] args) { //read the file system contents DirectoryInfo directoryInfo = new DirectoryInfo ( @"C:\Users\dillonm\Documents" ); FileInfo [] fileNames = directoryInfo.GetFiles( "*.*" ); Dictionary int , string > fileDictionary = new Dictionary int , string >(); //store the files for ( int i = 0; i //foreach(System.IO.FileInfo fi in fileNames){ fileDictionary.Add(i, fileNames[i].FullName); } //get user input Console .WriteLine( "Please enter the file name: " ); string fileToFind = Console .ReadLine(); //search! if (fileToFind == null ) { Console .WriteLine( "Please enter the file name: " ); } else { try { var query = fileDictionary.Values.Where(s => s.Contains(fileToFind)).ToList(); Console .WriteLine(query); Console .WriteLine( "Press enter to exit." ); Console .ReadLine(); } catch { Console .WriteLine( "File not found." ); } } } } }

mary jane · Answer

OH RIIIGHT!! I forgot about that. Thank you I will give this a try. =)

Muralidharan Deenathayalan · Answer

Lambda expression.

mary jane · Answer

What is " s => s"?

Muralidharan Deenathayalan · Answer

Hi, You can try this sample. DirectoryInfo directoryinfo = new System.IO. DirectoryInfo ( @"C:\Users\muralidharand\Documents\" ); FileInfo [] fileinfo = directoryinfo.GetFiles( "*.*" , System.IO.SearchOption.TopDirectoryOnly); Dictionary int , string > dict = new Dictionary int , string >(); for ( int i = 0; i { dict.Add(i, fileinfo[i].FullName); } string filename = Console.ReadLine(); var query = dict.Values.Where(s => s.Contains(filename)).ToList(); Search results will be in " query " variable. Hope this helps you.

console application c# - search for a file

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