Real Time Progress Bar

Sep 2, 2006

The ETL processing for my project will be deployed as part of a larger application which is operated by non-technical users. Therefore I want to provide real-time feedback to the user on progress, errors, etc., using windows standard GUI interface objects and style- for example a progress bar. The "designer" of course does some of this but there won't be any designer in our deployed application (and SSIS designer is neither intended to be used by, nor appropriate for, non-technical users anyway).

Now that I have the ETL logic working, it's time to tackle this UI requirement. I am thinking one way to do this is to start a script task to run in parallel with the main ETL processing, open a winform in that task that has various GUI objects whose "state" is based on package scoped variables, update the package level variables via the "on progress" event (or other events as needed) of various SSIS tasks and components, and refresh the winform's display regularly via a timer event.

Does this approach seem like it would be effective? Has anyone tried maintaining an open winform via a script task and updating it's objects via package variables in parrallel with the package is running other tasks?

Thanks,

Ken

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Hi,



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I have this scenario which is working fine, but would like to know if others have tried it or can recommend a better approach. Below is a brief description, but code should fully explain:



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Stroed Proc




Code Snippet

-- ...
WHILE 1 = 1
BEGIN
-- Param declarations

...



BEGIN TRANSACTION;
WAITFOR
(
-- Blocks while TargetQueue is empty
RECEIVE
TOP(1)
@conversation_handle = conversation_handle,
@message_type_name = message_type_name,
@conversation_group_id = conversation_group_id,
@message_body =
CASE
WHEN validation = 'X' THEN CAST(message_body AS XML)
ELSE CAST(N'' AS XML)
END
FROM [dbo].[TargetQueue] -- No time out!
)



-- Handle errors
...



-- Return received information. After this statement is executed,
-- reader.NextResult unblocks and reader.Read() can read these
-- new values
SELECT 'Conversation Group Id' = @conversation_group_id,
'Conversation Handle' = @conversation_handle,
'Message Type Name' = @message_type_name,
'Message Body' = @message_body ;

COMMIT TRANSACTION


END -- WHILE



C# Code






Code Snippet

// Create a SqlCommand, and initialize to execute above stored proc
// (set command time to zero!)
...



// ExecuteReader blocks until RECEIVE reads data from the target queue
using (SqlDataReader reader = cmd.ExecuteReader())
{
// Begin an infinite loop
while (true)
{
// Process data retrieved by RECEIVE
while (reader.Read())
{
Trace.WriteLine("Conversation Group Id :" + reader.GetGuid(0) +
"Conversation Handle: " + reader.GetGuid(1) +
"Message Type Name : " + reader.GetString(2) +
"Message Body : " + reader.GetString(3));

// Send data via pub/sub
...
}



// Blocks until stored procedure returns another select statement
// i.e., blobks until RECEIVE unblocks and retrieves more data from queue
reader.NextResult();
} // while
}





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thanks!

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