SSIS - ForEach From Variable Enumerator

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SSIS - ForEach From Variable Enumerator

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Prasad Boppana

Posted Monday, December 21, 2009 4:25 PM

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Hi,

I'm using ForEach Loop container and selected "ForEach From Variable Enumerator" option. I created a variable of System.Object(User::Collection) and selected the "User::Collection" for Variable dropdown in Enumertaor configuration.

I have a script task that populates the "User::Collection" variable. The code is listed below

Public Sub Main()
'
' Add your code here
'
Dim arr As New ArrayList
arr.Add("D:\Tests\a.txt")
arr.Add("D:\Tests\b.txt")
Dts.Variables("User::Collection").Value = arr

Dts.TaskResult = Dts.Results.Success
End Sub

The script task that populates the collection is connected to the foreach loop. In the foreach loop, there is a script task that reads the indexed value and displaying the value. I'm able to read only the first value and not all the other values in the collection. Any thoughts?

Thanks in Advance

Post #837644

Jeff Moden

Posted Monday, December 21, 2009 6:07 PM

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In plain English, what is it that you're trying to do?

--Jeff Moden

"RBAR is pronounced "ree-bar" and is a "Modenism" for "Row-By-Agonizing-Row".

First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column."

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Post #837677

Prasad Boppana

Posted Tuesday, December 22, 2009 7:59 AM

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Hi,

I'm trying to use "ForEach From Variable" Enumerator. In the foreach loop, I'm able to read only the first item from the collection.

How can I access all the items in the collection?

Thanks,

Post #837936

Jason-299789

Posted Tuesday, December 22, 2009 8:38 AM

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Like Jeff, I'm not sure what it is you are trying to do.

what is the purpose of the package? Is it to parse through a list of files?, to loop through a dataset?

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Post #837957

sabyasm

Posted Tuesday, December 22, 2009 8:46 AM

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Works fine for me.

How are you trying to access the variable from the object? Did you define another variable and mapped in for each loop?

--
Sabya

Post #837965

sabyasm

Posted Tuesday, December 22, 2009 8:49 AM

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The only additional thing I did was to define a variable user::fileJustFound (string).

On for each loop container -> variable mapping -> mapped user::fileJustFound as 0 (the only one variable)

Then used a simple file system task to delete the file with name = user::fileJustFound....

It looped through successfully and deleted files. Wondering if you are missing this part of mapping the variable appropriately.

--
Sabya

Post #837968

Jason-299789

Posted Tuesday, December 22, 2009 8:57 AM

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sabyasm (12/22/2009)

I would ask whats the point of using the Script Task if its a simple File directory parser, why not simply use the built in file Enumerator thats provided in the Task.

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Post #837974

sabyasm

Posted Tuesday, December 22, 2009 9:00 AM

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what is the purpose of the package? Is it to parse through a list of files?, to loop through a dataset?

You already asked Tongue

...

I was more curious and tried to help on why it wasn't working - rather than why he is using this approach..

--
Sabya

Post #837978

Jason-299789

Posted Tuesday, December 22, 2009 9:08 AM

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sabyasm (12/22/2009)

what is the purpose of the package? Is it to parse through a list of files?, to loop through a dataset?

You already asked Tongue

...

I was more curious and tried to help on why it wasn't working - rather than why he is using this approach..

Touche.... BigGrin

_________________________________________________________________________
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Post #837986

Prasad Boppana

Posted Tuesday, December 22, 2009 9:36 AM

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Jason Lees-299789 (12/22/2009)

Like Jeff, I'm not sure what it is you are trying to do.

what is the purpose of the package? Is it to parse through a list of files?, to loop through a dataset?

I need to get a list of Names from the database and use the list it in multiple tasks of the package. So I'm getting the names from the database and storing them in to a array list. The array list is stored in to a variable of System.Object. This will avoid the trips to the database to get the names every time I need them.

I'm trying to figure out how to read the names from the Variable(User::Collection) using the ForEach From Variable Enumerator.

Hope this helps.

Post #838007

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