Mega Code Archive
Tests if the specified file is newer than the reference file
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#region License and Copyright
/* -------------------------------------------------------------------------
* Dotnet Commons IO
*
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the
*
* Free Software Foundation, Inc.,
* 59 Temple Place,
* Suite 330,
* Boston,
* MA 02111-1307
* USA
*
* -------------------------------------------------------------------------
*/
#endregion
using System;
using System.Collections;
using System.Globalization;
using System.IO;
namespace Dotnet.Commons.IO
{
///
/// <summary>
/// This class provides basic facilities for manipulating files and file paths.
///
/// <h3>File-related methods</h3>
/// There are methods to
/// <list type="bullet">
/// <item>copy a file to another file,</item>
/// <item>compare the content of 2 files,</item>
/// <item>delete files using the wildcard character,</item>
/// <item>etc</item>
/// </list>
/// </summary>
///
public sealed class FileUtils
{
/// ---------------------------------------------------------------
/// <summary> Tests if the specified <i>file</i> is newer than the reference
/// <i>file</i>.
///
/// </summary>
/// <param name="newerFile">the <i>file</i> of which the modification date must be compared
/// </param>
/// <param name="referenceFile">the <i>file</i> of which the modification date is used
/// like reference
/// </param>
/// <returns> true if the <i>file</i> exists and has been modified more recently
/// than the reference <i>file</i>.
/// </returns>
/// ---------------------------------------------------------------
public static bool IsNewer(FileInfo newerFile, FileInfo referenceFile)
{
if (referenceFile == null)
throw new ArgumentNullException("referenceFile");
bool exists = referenceFile.Exists;
if (!referenceFile.Exists)
exists = Directory.Exists(referenceFile.FullName);
if (!exists)
throw new System.ArgumentException("The reference file '" + referenceFile + "' doesn't exist");
return IsNewer(newerFile, referenceFile.LastWriteTime);
}
/// ---------------------------------------------------------------
/// <summary>
/// Tests if the specified <i>file</i> is newer than the specified
/// time reference.
/// </summary>
/// <param name="file">the <i>file</i> of which the modification date must be compared.</param>
/// <param name="timeCompare">the time reference</param>
/// <returns>true if the <i>file</i> exists and has been modified after
/// the given time reference.</returns>
/// ---------------------------------------------------------------
public static bool IsNewer(FileInfo file, DateTime timeCompare)
{
if (file == null)
throw new ArgumentException("No file specified");
bool exists = file.Exists;
if (!file.Exists)
exists = Directory.Exists(file.FullName);
if (!exists)
return false;
return (file.LastWriteTime > timeCompare);
}
}
}
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