| public static EndWithDirectorySeparator ( string path ) : string | ||
| path | string | The path information to modify. |
| Результат | string | |
/// <summary>
/// Changes the parent of a <paramref name="path"/> string.
/// </summary>
/// <param name="path">The path information to modify.</param>
/// <param name="oldParent">The old parent.</param>
/// <param name="newParent">The new parent.</param>
/// <returns>The modified path information.</returns>
/// <exception cref="ArgumentNullException">Any of the parameters is <see langword="null"/> or empty.</exception>
/// <exception cref="ArgumentException"><paramref name="path"/> string does not start with the <paramref name="oldParent"/>.</exception>
/// <remarks>
/// This method is useful, when you need not just replace the path root, but one of its parent.<br/>
/// For example, to transform <c>C:\Source\SubDir\File.txt</c> into <c>D:\Target\SubDir\File.txt</c> the following code may be used:
/// <code>
/// string targetFile = PathHelper.ChangeParent(@"C:\Source\File.txt", @"C:\Source", @"D:\Target");
/// </code>
/// </remarks>
public static string ChangeParent(string path, string oldParent, string newParent)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(nameof(path));
}
if (string.IsNullOrEmpty(oldParent))
{
throw new ArgumentNullException(nameof(oldParent));
}
if (newParent == null)
{
throw new ArgumentNullException(nameof(newParent));
}
oldParent = PathHelper.EndWithDirectorySeparator(oldParent);
newParent = string.IsNullOrEmpty(newParent) ? string.Empty : PathHelper.EndWithDirectorySeparator(newParent);
if (!path.StartsWith(oldParent, StringComparison.OrdinalIgnoreCase))
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "Path '{0}' does not start with '{1}'", path, oldParent));
}
return(newParent + path.Substring(oldParent.Length));
}
/// <summary>
/// Updates the internal maps between the volume names (<c>D:\</c>) and device names (<c>\Device\HarddiskVolume2\</c>).
/// </summary>
private static void UpdateDeviceMappings()
{
List <string> driveLetters = DriveInfo.GetDrives().Select(d => d.RootDirectory.Name).Select(PathHelper.EndWithDirectorySeparator).ToList();
foreach (string driveLetter in driveLetters)
{
string deviceName = PathHelper.EndWithDirectorySeparator(PathHelper.GetDeviceDosName(driveLetter));
PathHelper.DriveLetterToDeviceName[driveLetter] = deviceName;
}
}