FileUtil.cs

/*************************************************************************************************
 Required Notice: Copyright (C) EPPlus Software AB. 
 This software is licensed under PolyForm Noncommercial License 1.0.0 
 and may only be used for noncommercial purposes 
 https://polyformproject.org/licenses/noncommercial/1.0.0/

 A commercial license to use this software can be purchased at https://epplussoftware.com
 *************************************************************************************************
 Date Author Change
 *************************************************************************************************
 01/27/2020 EPPlus Software AB Initial release EPPlus 5
 *************************************************************************************************/
using System;
using System.IO;
namespace EPPlusSamples
{
 public class FileUtil
 {
 static DirectoryInfo _outputDir = null;
 public static DirectoryInfo OutputDir
 {
 get
 {
 return _outputDir;
 }
 set
 {
 _outputDir = value;
 if (!_outputDir.Exists)
 {
 _outputDir.Create();
 }
 }
 } 
 public static FileInfo GetCleanFileInfo(string file)
 {
 var fi = new FileInfo(OutputDir.FullName + Path.DirectorySeparatorChar + file);
 if (fi.Exists)
 { 
 fi.Delete(); // ensures we create a new workbook
 } 
 return fi; 
 }
 public static FileInfo GetFileInfo(string file)
 {
 return new FileInfo(OutputDir.FullName + Path.DirectorySeparatorChar + file);
 }

 public static FileInfo GetFileInfo(DirectoryInfo altOutputDir, string file, bool deleteIfExists = true)
 {
 var fi = new FileInfo(altOutputDir.FullName + Path.DirectorySeparatorChar + file);
 if (deleteIfExists && fi.Exists)
 {
 fi.Delete(); // ensures we create a new workbook
 }
 return fi; 
 }


 internal static DirectoryInfo GetDirectoryInfo(string directory)
 {
 var di = new DirectoryInfo(_outputDir.FullName + Path.DirectorySeparatorChar + directory);
 if (!di.Exists)
 {
 di.Create();
 }
 return di;
 }
 /// <summary>
 /// Returns a fileinfo with the full path of the requested file
 /// </summary>
 /// <param name="directory">A subdirectory</param>
 /// <param name="file"></param>
 /// <returns></returns>
 public static FileInfo GetFileInfo(string directory, string file)
 {
 var rootDir = GetRootDirectory().FullName;
 return new FileInfo(Path.Combine(rootDir, directory, file));
 }

 public static DirectoryInfo GetRootDirectory()
 {
 var currentDir = AppDomain.CurrentDomain.BaseDirectory;
 while (!currentDir.EndsWith("bin"))
 {
 currentDir = Directory.GetParent(currentDir).FullName.TrimEnd('\\');
 }
 return new DirectoryInfo(currentDir).Parent;
 }

 public static DirectoryInfo GetSubDirectory(string directory, string subDirectory)
 {
 var currentDir = GetRootDirectory().FullName;
 return new DirectoryInfo(Path.Combine(currentDir, directory, subDirectory));
 }
 }
}