begginer help

[willissteve0]

hi i want to remove a file extension from a string how can i do this ?

DirectoryInfo di = new DirectoryInfo(@"threads/");
FileInfo[] threads = di.GetFiles("*.aspx");

foreach (FileInfo file in threads)
{
string x = file.Name;
char[] y = x.ToCharArray();
int i = x.Length;
char[] j;
int t = 0;

while (t < (i - 4))
{
j[t] = y[t];
t++;
}

Literal1.Text = "<a href=" + x +">" + x + "</a>";
}

[MKohli]

Try using this code,.
You can modify it as per your requirement. I wrote it show you how to split up the filename and extension.


DirectoryInfo di = new DirectoryInfo(@"threads/");
);
FileInfo[] threads = di.GetFiles("*.aspx");


foreach (FileInfo f in threads)
{
string[] arFileName= f.Name.Split('.');
string FileName = arFileName[0];
string Extension = arFileName[1];

}

[BigEd781]

Or, a better way to do it:

string name = System.IO.Path.GetFileNameWithoutExtension( filename );

No need to reinvent the wheel on this one.

[CuteAssistant]

Yes System.IO.File has enough functions to deal with all this - and moreover splitting by . may not work all the time . The best way to do it is by using GetFileNameWithoutExtension()

[BigEd781]

Exactly. This file name is perfectly legal and MKohli's suggestion could not handle it

SomeFile.whatever.txt

[MKohli]

Yupp.... You are correct.

[BigEd781]

That said, if you wanted to see what that method does it just uses LastIndexOf('.') instead and has a bit more error checking. This is the implementation:

public static string GetFileNameWithoutExtension(string path)
{
    path = GetFileName(path);
    if (path == null)
    {
        return null;
    }
    int length = path.LastIndexOf('.');
    if (length == -1)
    {
        return path;
    }
    return path.Substring(0, length);
}