How can i get the fileinfo of all files in a folder with GetFile()?

Question

I dont know whats my mistake.

FileInfo[] FileInformation = DirectoryInfo.GetFiles(textBoxPath.Text);  
for (int i = 0; i <= FileInformation.Length; i++)
{
            


        

Answer 1

Use the following:

    System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(textBoxPath.Text);
    System.IO.FileInfo[] fileInformations = dir.GetFiles();  
    for (int i = 0; i <= fileInformations.Length; i++)
    {
        System.IO.File.Move(fileInformations[i].DirectoryName, System.IO.Path.Combine(FileInformation[i].Directory, "File" + i));
    }

EDIT: renamed your FileInformation to the properway to write local variable names fileInformations. Used Path.Combine to combine paths and filename instead of using string combination, as this will take care of missing / and other path issues.

Answer 2

DirectoryInfo is not a static class (you mixed it with Directory which exposes static methods) thus you should create instance of it:

var dir = new DirectoryInfo(textBoxPath.Text);
FileInfo[] files = dir.GetFiles();

Also I suggest you to use Path.Combine for generating new file path and FileInfo.MoveTo method, which don't require source directory name:

for(int i = 0; i < files.Length; i++)
{
    FileInfo file = files[i];
    string destination = Path.Combine(file.DirectoryName, "File", i.ToString());
    file.MoveTo(destination);
} 

---

One more thought - if you don't need any additional info about files, besides names, then you can get file names only, without FileInfo objects creation. Use static methods of Directory and File classes. That will be more efficient:

string sourceDir = @"D:\Downloads";

string[] files = Directory.GetFiles(sourceDir);
for (int i = 0; i < files.Length; i++)
{
    string fileName = files[i];
    var destination = Path.Combine(sourceDir, "File", i.ToString());
    File.Move(fileName, destination);             
}