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              【C#】獲取文件信息匯總
              2021-09-23 17:45:24

              一、刪除文件或文件夾

              File.Delete(fileName);
              Directory.Delete(fileName, true);

              /// <summary>
                      /// 刪除文件夾以及文件
                      /// </summary>
                      /// <param name="directoryPath"> 文件夾路徑 </param>
                      /// <param name="fileName"> 文件名稱 </param>
                      public static void DeleteDirectory(string directoryPath, string fileName)
                      {
              
                          //刪除文件
                          for (int i = 0; i < Directory.GetFiles(directoryPath).ToList().Count; i++)
                          {
                              if (Directory.GetFiles(directoryPath)[i] == fileName)
                              {
                                  File.Delete(fileName);
                              }
                          }
              
                          //刪除文件夾
                          for (int i = 0; i < Directory.GetDirectories(directoryPath).ToList().Count; i++)
                          {
                              if (Directory.GetDirectories(directoryPath)[i] == fileName)
                              {
                                  Directory.Delete(fileName, true);
                              }
                          }
                      }

              https://www.cnblogs.com/foreverfendou/p/9667497.html

              ?

              二、獲取文件夾下所有的子文件

              DirectoryInfo dirInfo = new DirectoryInfo(DirectoryPath);
              
              FileInfo[] fileInfos = dirInfo.GetFiles();
              foreach (FileInfo fileInfo in fileInfos)
              {
                 //fileInfo.Name
              }
              
              DirectoryInfo[] dirInfos = dirInfo.GetDirectories();
              foreach (DirectoryInfo dirInfo1 in dirInfos)
              {
                 //dirInfo1.FullName
              }

              ?

              (1) https://blog.csdn.net/zhulongxi/article/details/51318910

              (2) https://q.cnblogs.com/q/9527/


              三、獲取當前應用程序所在路徑及環(huán)境變量

              //獲取應用程序的當前工作目錄
              string str3=Directory.GetCurrentDirectory();
              
              
              //獲取或設置包含該應用程序的目錄的名稱。
              string str7=AppDomain.CurrentDomain.SetupInformation.ApplicationBase
              
              
              //獲取啟動了應用程序的可執(zhí)行文件的路徑,不包括可執(zhí)行文件的名稱
              string str5=Application.StartupPath;

              https://www.cnblogs.com/xz4062006/p/4245474.html

              ?

              四、排序

              (1)文件排序

              1、按名稱順序排列

                /// <summary>
                /// C#按文件名排序(順序)
                /// </summary>
                /// <param name="arrFi">待排序數組</param>
                private void SortAsFileName(ref FileInfo[] arrFi)
                {
                  Array.Sort(arrFi, delegate(FileInfo x, FileInfo y) { return x.Name.CompareTo(y.Name); });
                }
               
                調用方法:
               
                private void SortFiles()
                {
                  string filePath = "E:\";
                  DirectoryInfo di = new DirectoryInfo(filePath);
               
                  FileInfo[] arrFi = di.GetFiles("*.*");
                  SortAsFileName(ref arrFi);
               
                  for (int i = 0; i < arrFi.Length; i++)
                    Response.Write(arrFi[i].Name + ":<br />");
                }

              ?

              2、按名稱倒序排列

              /// <summary>
                /// C#按文件名排序(倒序)
                /// </summary>
                /// <param name="arrFi">待排序數組</param>
                private void SortAsFileName(ref FileInfo[] arrFi)
                {
                  Array.Sort(arrFi, delegate(FileInfo x, FileInfo y) { return y.Name.CompareTo(x.Name); });
                }

              ?

              3、按創(chuàng)建時間順序排列

                /// <summary>
                /// C#按創(chuàng)建時間排序(順序)
                /// </summary>
                /// <param name="arrFi">待排序數組</param>
                private void SortAsFileCreationTime(ref FileInfo[] arrFi)
                {
                  Array.Sort(arrFi, delegate(FileInfo x, FileInfo y) { return x.CreationTime.CompareTo(y.CreationTime); });
                }

              ?

              4、按創(chuàng)建時間倒序排列

                /// <summary>
                /// C#按創(chuàng)建時間排序(倒序)
                /// </summary>
                /// <param name="arrFi">待排序數組</param>
                private void SortAsFileCreationTime(ref FileInfo[] arrFi)
                {
                  Array.Sort(arrFi, delegate(FileInfo x, FileInfo y) { return y.CreationTime.CompareTo(x.CreationTime); });
                }

              ?

              (2)文件夾排序

              1、按名稱順序排列

                /// <summary>
                /// C#按文件夾名稱排序(順序)
                /// </summary>
                /// <param name="dirs">待排序文件夾數組</param>
                private void SortAsFolderName(ref DirectoryInfo[] dirs)
                {
                  Array.Sort(dirs, delegate(DirectoryInfo x, DirectoryInfo y) { return x.Name.CompareTo(y.Name); });
                }
               
                調用方法:
               
                private void FolderSort()
                {
                  string filePath = "E:\";
                  DirectoryInfo di = new DirectoryInfo(filePath);
               
                  DirectoryInfo[] arrDir = di.GetDirectories();
                  SortAsFolderName(ref arrDir);
               
                  for (int i = 0; i < arrDir.Length; i++)
                    Response.Write(arrDir[i].Name + ":<br />");
                }

              ?

              2、按名稱倒序排列

              ?

                /// <summary>
                /// C#按文件夾名稱排序(倒序)
                /// </summary>
                /// <param name="dirs">待排序文件夾數組</param>
                private void SortAsFolderName(ref DirectoryInfo[] dirs)
                {
                  Array.Sort(dirs, delegate(DirectoryInfo x, DirectoryInfo y) { return y.Name.CompareTo(x.Name); });
                }

              ?

              3、按創(chuàng)建時間順序排列

              ?

                /// <summary>
                /// C#按文件夾夾創(chuàng)建時間排序(順序)
                /// </summary>
                /// <param name="dirs">待排序文件夾數組</param>
                private void SortAsFolderCreationTime(ref DirectoryInfo[] dirs)
                {
                  Array.Sort(dirs, delegate(DirectoryInfo x, DirectoryInfo y) { return x.CreationTime.CompareTo(y.CreationTime); });
                }

              ?

              4、按創(chuàng)建時間倒序排列

                /// <summary>
                /// C#按文件夾創(chuàng)建時間排序(倒序)
                /// </summary>
                /// <param name="dirs">待排序文件夾數組</param>
                private void SortAsFolderCreationTime(ref DirectoryInfo[] dirs)
                {
                  Array.Sort(dirs, delegate(DirectoryInfo x, DirectoryInfo y) { return y.CreationTime.CompareTo(x.CreationTime); });
                }

              https://blog.csdn.net/sy95122/article/details/93971483

              本文摘自 :https://www.cnblogs.com/

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