'How to rename a file if it already exists in directory (ASP.net)

I have seen quite a few file uploads questions online, but it hasnt seemed to work for me. I need to rename my file if it already exists in the directory.

I have even tried MSDN save as/rename method but it doesn't seem to work, maybe I'm missing something. I dont want to delete or override anything guys.

This is what I'm using so far, but it just overwrites the files

string folderName = Server.MapPath("\\Track\\Upload");    
string pathString = System.IO.Path.Combine(folderName, SupDDL.SelectedItem.Text.Trim());
System.IO.Directory.CreateDirectory(pathString);
string fileName = QuoteUpload.FileName;
if (!System.IO.File.Exists(pathString))
{
using (System.IO.FileStream fs = System.IO.File.Create(pathString))
 {
   for (byte i = 0; i < 100; i++)
  {
   fs.WriteByte(i);
   }
QuoteUpload.SaveAs(pathString)}
}

Excuse me if I haven't given enough details, just let me know if you would like more information.

UPDATED

So I have updated it to this, it does the job, but I would like it to automatically increment numbers, instead of just adding the 2 once.

int count = 2;
string fileNameOnly = Path.GetFileNameWithoutExtension(pathString);
string extension = Path.GetExtension(pathString);
string path = Path.GetDirectoryName(pathString);
string newPath = pathString;

if (!System.IO.File.Exists(pathString))
{
QuoteUpload.SaveAs(pathString);
}
else {
string tempName = string.Format("{0}({1})", fileNameOnly, count++);
newFullPath = Path.Combine(path, tempFileName + extension);
QuoteUpload.SaveAs(newPath); }
}
c++sharpasp.net


Solution 1:[1]

Try to just calling the save as.

if (!System.IO.File.Exists(pathString))
{
   QuoteUpload.SaveAs(pathString);
}

Solution 2:[2]

From what I know, there is now "Rename()" method in c#.

It's not smart to run over 100 bytes, cause you'll never know how big is the upload file..

What you can do is create Help functions:

the first one - will check whether the file exists

the second one - will delete / override the existing file

the third one - will upload the new file

as follows: 1 + 2. 

public void DeleteFileIfExists(string BaseDir, string fileName)
{
    DirectoryInfo dir = new DirectoryInfo(BaseDir);

    foreach (FileInfo fi in dir.GetFiles())
    {
        string NameWithoutExtenstion = Path.GetFileNameWithoutExtension(fi.Name);
        if (NameWithoutExtenstion.Equals(fileName))
        {
            fi.Delete();
            break;
        }
    }
}

3.

public void uploadFile(HttpPostedFileBase oldfile, string newFile, string Path, HttpServerUtilityBase Server)
{
    string path = Path.Combine(Server.MapPath(Path),
                               Path.GetFileName(oldfile.FileName)); //file.FileName
    oldfile.SaveAs(path);
    System.IO.File.Copy(path, Server.MapPath(Path) + "/" + newName + ".FileExt");
    DeleteFileIfExists(Server.MapPath(Path), Path.GetFileNameWithoutExtension(oldfile.FileName));
}

this following functions is good for any kind of files.

If you have any further question, please ask.

good luck!

Solution 3:[3]

There is no rename function, you can do this by copy file with new name and delete old one.

C# Sample

string strFilePath = Server.MapPath("~/FilesFolder/");
string strOldFileName = "OldFileName.rar";
string strNewFileName = "NewFilName.rar";

if (System.IO.File.Exists(strFilePath + strOldFileName)) {
    System.IO.FileInfo FileInfo = new System.IO.FileInfo(strFilePath + strOldFileName);
    FileInfo.CopyTo(strFilePath + strNewFileName, true);
    FileInfo.Delete();
}



VB Sample

Dim strFilePath As String = Server.MapPath("~/FilesFolder/")
Dim strOldFileName As String = "OldFileName.rar"
Dim strNewFileName As String = "NewFilName.rar"

If IO.File.Exists(strFilePath & strOldFileName) Then
    Dim FileInfo As IO.FileInfo = New IO.FileInfo(strFilePath & strOldFileName)
    FileInfo.CopyTo(strFilePath & strNewFileName, True)
    FileInfo.Delete()
End If

Solution 4:[4]

Before the using you should put a check to rename the file if it exists:

            if (File.Exists(pathString))
                File.Move(pathString, newFilePath);

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Yuliam Chandra
Solution 2 Roy Doron
Solution 3
Solution 4 Eric Lemes

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