C#获取指定目录下的指定文件

1.首先，需要指定获取的文件夹，以及获取文件的文件名;

文件夹：strlocalpath = system.windows.forms.application.startuppath + "\\exceltemplate\\";

文件名：temp.xlsx

2.代码：

executionresult result = new executionresult();
 result.status = true;
 string strlocalpath = system.windows.forms.application.startuppath + "\\exceltemplate\\";
 if (directory.exists(strlocalpath))
 {
 foreach (string gcfile in directory.getfiles(strlocalpath, "temp.xlsx", searchoption.topdirectoryonly))
    {
   string filename = path.getfilename(gcfile);
   string filename = path.getfilename(gcfile).replace(".xlsx", "") + datetime.now.tostring("_yyyymmdd") + ".xlsx";
        try
         {
        file.copy(strlocalpath + filename, strlocalpath + "temp\\" + filename, true);
        result = geta31daydata(strlocalpath + "temp\\" + filename);
         }
      catch (exception ex)
          {
         result.status = false;
         result.message = "copy file to destination file exception. msg:" + ex.message;
         result.anything = ex.message;
   if (meslog.iserrorenabled)
   {
 meslog.error(ex.stacktrace);
    }
        }
           }
     }
  else
 {
 result.status = false;
 result.message = "directory not exists!";
  }
    return result;