" Live as if you were to die tomorrow. Learn as if you were to live forever.. "
- Mahatma Gandhi
" Live as if you were to die tomorrow. Learn as if you were to live forever.. "
- Mahatma Gandhi
|
In our projects, some times we need to compare files and delete or move the duplicate files to another folder.LINQ (Language Integrated Query) is a Microsoft programming model and methodology that essentially adds formal query capabilities into Microsoft .NET-based programming languages. LINQ will help to check the duplicates files and return the list of duplicate files.
|
|
Please take a look at the code snippet given below :
|
public void RemoveDuplicateFiles()
{
string destinationFile = string.Empty;
List<string> duplicatedFileList = new List<string>();
duplicatedFileList = GetDuplicatedFileList(@"E:\Backup\Test", "*.txt");
for (int iCounter = 0; iCounter < duplicatedFileList.Count(); ++iCounter)
{
try
{
destinationFile = duplicatedFileList[iCounter].Replace("Test", "Movedfiles");
File.Move(duplicatedFileList[iCounter], destinationFile);
}
catch (FileNotFoundException ex)
{
// Handle error
ex.ToString();
}
}
}
public List<string> GetDuplicatedFileList(string folderPath, string fileExtension)
{
List<string> duplicatedFileList = new List<string>();
try
{
duplicatedFileList = Directory.GetFiles(folderPath, fileExtension)
.Select(
f => new
{
FileName = f,
FileHash = GetFileHash(f)
})
.GroupBy(f => f.FileHash)
.Select(g => new { FileHash = g.Key, Files = g.Select(z => z.FileName).ToList() })
.SelectMany(f => f.Files.Skip(1))
.ToList();
}
catch (Exception ex)
{
//Handle exception
ex.ToString();
}
return duplicatedFileList;
}
public string GetFileHash(string fileName)
{
string fileHash = string.Empty;
try
{
using (FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
fileHash = Encoding.UTF8.GetString(new SHA1Managed().ComputeHash(fileStream));
}
}
catch (FileNotFoundException ex)
{
// Handle your exceptions
ex.ToString();
}
catch (Exception ex)
{
// Handle your exceptions
ex.ToString();
}
return fileHash;
}