WildCards in SSIS Collection {not include} name xlsx - sql-server

Question

I have a process built in SSIS that loops through Excel files and Import data only from those that include name Report.
My UserVariable used as Expression is: *Report*.xlsx
and it works perfectly fine. Now I am trying to build similar loop but only for files that DOES NOT include Report in file name.
Something like *<>Report*.xlsx
Is it possible?
Thanks for help!
Matt

Answer 1

In your loop, put a Script task before your first task. Connect those two with a line. Right click that line and set Constraint Options to expression. Your expression would look like this...
FINDSTRING(#var, "Report", 1) == 0
Where #var is the loop iterable.
Only files without "Report" inside will proceed to the next step.
Referencing this exact answer. SSIS Exclude certain files in Foreach Loop Container

Answer 2

Unfortunately, you cannot achieve this using SSIS expression (something like *[^...]*.xlsx) you have to search for some workarounds:
Workarounds
First
Get List of - filtered - files using an Execute Script Task before entering Loop and loop over then using ForEach Loop container (Ado enumerator)
You have to a a SSIS variable (ex: User::FilesList) with type System.Object (Scope: Package)
Add an Execute Script Task befor the for each Loop container and add User::FilesList as a ReadWrite Variable
In the Script Write The following Code:
Imports System.Linq
Imports System.IO
Imports System.Collections.Generic
Public Sub Main()
Dim lstFiles As New List(Of String)
lstFiles.AddRange(Directory.GetFiles("C:\Temp", "*.xlsx", SearchOption.TopDirectoryOnly).Where(Function(x) Not x.Contains("Report")).ToList)
Dts.Variables.Item("FilesList").Value = lstFiles
Dts.TaskResult = ScriptResults.Success
End Sub
In the For each Loop Container Choose the Enumertaion Type as 'From variable Enumerator' and choose FilesList variable as a source
ScreenShots
Second
Inside the for each loop add an Expression Task to check if the file contains Report string or not
Add a variable of type System.Boolean (Name: ExcludeFile)
Inside the ForEach Loop Container add an Expression Task component before the DataFlowTask you that imports the Excel File
Inside The Expression Task write the following:
#[User::ExcludeFile] = (FINDSTRING(#[User::XlsxFile], "Report", 1 ) == 0)
Double Click on the connector between the expression task and the DataFlowTask and write the following expression
#[User::ExcludeFile] == False
Note: It is not necessary to use an Expression Task to validate this you can use a Dummy DataFlowTask or a Script Task to check if the filename contains the Keyword you want to exclude or not