LINQ Lambda Expression

Question

User1867786015 posted

Hi,

I have scenario to get file from one folder and move the files to another folder.

I written the linq lambda query for getting all files from folder.

 DirectoryInfo sourceFolder= new DirectoryInfo(outfolderPath);

var files = sourceFolder.getfiles().select(x => x.name).Toarray();

I have another method to move the file from another folder.

In this method i have input parameter as filename.

Based on input filename i am moving particular file to another folder.

I need to know how to do this scenario using LINQ lambda expression.

Please help me the way to do this.

 

 

Thanks,

Saravanan.A

 

Answer 1

User1577371250 posted

Hi,

1. get the files from a directory and Move. I think you don;t need LINQ for this.

string targetDirectory = @"D:\Test\";
if(Directory.Exists(targetDirectory))
{
     string [] fileEntries = Directory.GetFiles(targetDirectory);
     foreach(string fileName in fileEntries)
     {
        File.Move(Path.Combine(targetDirectory,fileName), @"D:\test1\") 
      }
}

https://msdn.microsoft.com/en-us/library/wz42302f%28v=vs.110%29.aspx

https://msdn.microsoft.com/en-us/library/system.io.file.move%28v=vs.110%29.aspx

Answer 2

User-830258159 posted

Use the below code

string sourceDirectory = "c:\\Prakher\\";

string targetDirectory = "c:\\Prakher\\Test\\";

System.IO.Directory.GetFiles(sourceDirectory).ToList().ForEach(file => System.IO.File.Move(file, targetDirectory + file.Split('\\').Last()));

you can even call your own method instead of File.Move inside the foreach loop. 

Answer 3

User1867786015 posted

Thanks,

Actually i want particular filename need to move one folder to another folder.

In  Where condition to apply filename?.

How to apply this.

Answer 4

User-830258159 posted

you can apply a filter of file name as below

System.IO.Directory.GetFiles(sourceDirectory).Where(f=> f.contains(yourfilename)).ToList().ForEach(file => System.IO.File.Move(file, targetDirectory + file.Split('\\').Last()));