public async Task RenameAsync(string newName, NameCollisionOption collisionOption = NameCollisionOption.FailIfExists, CancellationToken cancellationToken = default(CancellationToken))
{
bool alreadyExists = false;
string finalName = newName;
int counter = 1;
do
{
counter++;
alreadyExists = file.ParentFile.FindFile(finalName) != null;
if (alreadyExists)
{
switch (collisionOption)
{
case NameCollisionOption.GenerateUniqueName:
finalName = $"{System.IO.Path.GetFileNameWithoutExtension(newName)} ({counter}){System.IO.Path.GetExtension(newName)}";
break;
case NameCollisionOption.ReplaceExisting:
file.ParentFile.FindFile(finalName).Delete();
break;
case NameCollisionOption.FailIfExists:
throw new AlreadyExistsException();
default:
break;
}
}
} while (alreadyExists);
file.RenameTo(newName);
}
/// <summary>
/// Ändert den Objektnamen (API level 14)
/// </summary>
/// <param name="storagename">z.B. "primary" oder "19F4-0903"</param>
/// <param name="volpath">abs. Pfad im Volume</param>
/// <param name="newfilename"></param>
/// <returns></returns>
public bool Rename(string storagename, string volpath, string newfilename)
{
if (newfilename.Contains('/'))
{
throw new Exception("Path for newname is not allowed.");
}
/*
* boolean renameTo (String displayName)
*
* Renames this file to displayName.
* Note that this method does not throw IOException on failure. Callers must check the return value.
* Some providers may need to create a new document to reflect the rename, potentially with a different MIME type, so getUri() and getType() may change to reflect the rename.
* When renaming a directory, children previously enumerated through listFiles() may no longer be valid.
*
* Parameters
* displayName String: the new display name.
*
* Returns
* boolean true on success.
*/
DocumentFile doc = GetExistingDocumentFile(storagename, volpath);
bool ok = doc.RenameTo(newfilename);
System.Diagnostics.Debug.WriteLine("AndroidRename(" + storagename + ", " + volpath + ", " + newfilename + ") = " + ok.ToString());
return(ok);
}