Running the scheduler twice is updating the file with the earlier file in Console application C#

问题

I have a requirement where my scheduler will run twice in a day. One in the morning and a second time in evening. When I run my current code it stores the file in a folder.

So again when I run the same application in the evening what happens is that the same file which is saved earlier in the morning is getting updated again which I don't want to happen. I want to save both the files. So what should I do?

Below is my current code. Please give me suggestions

public void ExportExcel(string strWorkbookName, DataSet ds)
    {   
        string strDateFolder = "";
        string strFileName = ConfigurationManager.AppSettings["FileName"].ToString();

        try
        {
            using (XLWorkbook wb = new XLWorkbook())
            {
                strDateFolder = DateTime.Now.ToString("dd-MM-yyyy");

                if (Directory.Exists(strDateFolder))
                {
                    Directory.CreateDirectory(strDateFolder);
                }

                wb.Worksheets.Add(ds);
                wb.SaveAs(ConfigurationRead.GetAppSetting("ReportDirectory") + "\\" + strDateFolder + "\\" + strFileName);
            }
        }
        catch (Exception)
        {
            throw;
        }
    }

UPDATE

Also, I want to delete the folder created after 7 days..Is that also possible ?

回答1:

strDateFolder will contain the same value through both runs because it gets the date. You may want to add time to that so it creates another file. Like this:

strDateFolder = DateTime.Now.ToString("dd-MM-yyyy-hh");

Then, the code below is like saying: if this directory exists, create it.

if (Directory.Exists(strDateFolder))
{
     Directory.CreateDirectory(strDateFolder);
}

You can use only this, because it will create it only if it does not exist:

Directory.CreateDirectory(strDateFolder);

Update from post: This would delete your folders older that 6 days

CultureInfo enUS = new CultureInfo("en-US");
string path = ConfigurationRead.GetAppSetting("ReportDirectory");
DateTime currentDate = DateTime.Now.AddDays(-7);
foreach (string s in Directory.GetDirectories(path))
{
     string folderPath = s.Remove(0, path.Length);
     if (DateTime.TryParseExact(folderPath, "dd-MM-yyyy hhmmss", enUS, DateTimeStyles.AssumeLocal, out DateTime td))
     {
          if (td <= currentDate)
          {
               Directory.Delete(s, true);
          }
     }
}

来源：https://stackoverflow.com/questions/49192917/running-the-scheduler-twice-is-updating-the-file-with-the-earlier-file-in-consol