正则表达式要在C＃中删除此字符串？

Question

I am scripting Agent Jobs using SMO for SQL Server and the resulting script strings have a have parameter and value that I want to remove from the final version I am storing. The portion of the script that I want to look at is the schedule being added to the job, where it includes a @schedule_uid parameter with a GUID associated with it. I'd like to remove this entirely from the script.

EXEC @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id=@jobId, @name='Job Name', 
        @enabled=1, 
        @freq_type=4, 
        @freq_interval=1, 
        @freq_subday_type=4, 
        @freq_subday_interval=10, 
        @freq_relative_interval=1, 
        @freq_recurrence_factor=0, 
        @active_start_date=20150119, 
        @active_end_date=99991231, 
        @active_start_time=0, 
        @active_end_time=235959, 
        @schedule_uid=N'a70709af-bce7-4c65-a4cd-7574acd31ca2'

The part that I want to replace is the following:

, \r\n\t\t@schedule_uid=N'a70709af-bce7-4c65-a4cd-7574acd31ca2'

So that the final string is:

EXEC @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id=@jobId, @name='Job Name', 
        @enabled=1, 
        @freq_type=4, 
        @freq_interval=1, 
        @freq_subday_type=4, 
        @freq_subday_interval=10, 
        @freq_relative_interval=1, 
        @freq_recurrence_factor=0, 
        @active_start_date=20150119, 
        @active_end_date=99991231, 
        @active_start_time=0, 
        @active_end_time=235959

I've tried various combinations of things I've been reading online but I can't seem to make it replace or even match. I know that the regex for the guid matching is:

\b[A-F0-9]{8}(?:-[A-F0-9]{4}){3}-[A-F0-9]{12}\b'

I've tried to add this into a number of things, and thought that the following regex would work but can't figure out what I'm doing wrong or missing

@", \r\n\t\t@schedule_uid=N'\b[A-F0-9]{8}(?:-[A-F0-9]{4}){3}-[A-F0-9]{12}\b'"
@", \r\n\t\t@schedule_uid=N'[A-F0-9]{8}(?:-[A-F0-9]{4}){3}-[A-F0-9]{12}'"
@", \r\n\t\t\b@schedule_uid=N'[A-F0-9]{8}(?:-[A-F0-9]{4}){3}-[A-F0-9]{12}'\b"

I'm not looking for a solution as much as I'd like to know what I'm missing. I've been reading the regular-expressions.info site for a while and I'm usually able to figure out the correct regex, but this has had me stumped for a few days now.

EDIT:

It's not always the last item and it's not guaranteed to only occur once within the script since a job can have multiple schedules which have different @schedule_uid's and I want to get rid of all of them without looping. This is why I chose Regex for the operation. It also needs to remove the comma at the end of the previous parameters line for the code to remain syntax correct.

Answer 1

The following seems to work for me and it will enable you to remove all the newlines, tabs etc:

(?:\n|\t|\r|.){1,3}.*\@sc.*'

You can see it working here

Answer 2

There you go:

@schedule_uid=N'[\\w]{8}-[\\w]{4}-[\\w]{4}-[\\w]{4}-[\\w]{12}'

Created and tested using http://regexpal.com/

Answer 3

A little more complicated, but works.

string test = "EXEC...";

var lines = test.Split(new char [] { ',' }).ToList();

lines = lines.Select((line, index) => 
{
  var indexof = line.IndexOf("@schedule_uid");
  if (indexof > -1)
  {
    if (index == 0)
    {
      return line.Substring(0, indexof);
    }
    else
    {
      return null;
    }
  }
  return line + ",";
})
.Where(line => line != null)
.ToList();

test = string.Join(string.Empty, lines);

JsFiddle Example .

Answer 4

Assuming as little as possible, just using basic string operations.

        string exec = ...

        int i = exec.IndexOf("@schedule_uid");

        while (i > -1)
        {
            int j = i;
            //Find the previous comma
            while (exec[i] != ',')
                i--;
            //Find the end, next line, or next comma
            while (j < exec.Length && exec[j] != '\r' && exec[j] != ',')
                j++;
            exec = exec.Remove(i, j - i);
            i = exec.IndexOf("@schedule_uid");
        }

I'm deliberately ignoring the no looping requirement, in favour of simple code that works. tested vs this...

        string exec = @"
        EXEC @ReturnCode = msdb.dbo.sp_add_jobschedule, @schedule_uid=N'a70709af-bce7-4c65-a4cd-7574acd31ca2', @job_id=@jobId, @name='Job Name', 
    @enabled=1, 
    @freq_type=4, 
    @freq_interval=1, 
    @freq_subday_type=4, 
    @freq_subday_interval=10, 
    @freq_relative_interval=1, 
    @freq_recurrence_factor=0, 
    @schedule_uid=N'a70709af-bce7-4c65-a4cd-7574acd31ca2', 
    @active_start_date=20150119, 
    @active_end_date=99991231, 
    @active_start_time=0, 
    @active_end_time=235959, 
    @schedule_uid=N'a70709af-bce7-4c65-a4cd-7574acd31ca2'";