/// <summary>
/// Deletes a specific file version.
/// </summary>
/// <param name="versioningFileItem">File version.</param>
/// <param name="versionId">File version Id.</param>
public static void DeleteVersion(IVersioningFile versioningFileItem, string versionId)
{
Validate.RequiredParameter("versioningFileItem", versioningFileItem);
if (String.IsNullOrEmpty(versionId))
{
throw new ArgumentException("versionId can not be null or empty", "versionId");
}
ThrowIfCheckedOut(versioningFileItem);
IList <UnifiedVersion> versions = versioningFileItem.GetVersions();
if (versions.Count == 1)
{
throw new InvalidVersioningOperationException();
}
UnifiedVersion targetVersion = versions.SingleOrDefault <UnifiedVersion>(v => v.Id.ToString() == versionId);
if (targetVersion == null)
{
throw new VersionNotFoundException(versionId);
}
targetVersion.Delete();
}
/// <summary>
/// Determines whether can perform operations with versions of the specified file.
/// </summary>
/// <param name="file">The file.</param>
/// <returns>
/// <c>true</c> if can perform operations with versions of the specified file; otherwise, <c>false</c>.
/// </returns>
public static bool CanChangeVersions(IVersioningFile file)
{
Validate.RequiredParameter("file", file);
return(file.GetVersions().Count > 1 && CanEdit(file as VirtualFileBase));
}