vb.Net loop through Dataset.Table(0)

I have a dataset being returned from SQL Server into my web form

It has a column  called BatchNumber that can be from 1 to 1000 rows


I also have a comma seperated string
strMyList = "1,3,5,7"

I would like to remove from strMyList any value not in the "longer list"

So that if the dataset does not have BatchNumber 3 then
strMyList would = "1,5,7"
Larry Bristersr. DeveloperAsked:
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Dorababu MSenior Software EngineerCommented:
Can you explain more clearly may be by sending some screen shots of input and output
ste5anSenior DeveloperCommented:
It would be much more efficient to do this on the server.. to reduce data round-trips. E.g.

DECLARE @Batches TABLE
    (
        BatchNumber INT
    );

INSERT INTO @Batches ( BatchNumber )
VALUES ( 1 ) ,
       ( 2 ) ,
       ( 3 ) ,
       ( 4 );

DECLARE @Parameter VARCHAR(MAX) = '1,3,5,7';

WITH XmlData
AS ( SELECT CAST('<id>' + REPLACE(@Parameter, ',', '</id><id>') + '</id>' AS XML) AS XmlData ) ,
     IdList
AS ( SELECT A.id.value('.', 'INT') AS id
     FROM   XmlData XD
            CROSS APPLY XD.XmlData.nodes('id') A(id) ) ,
     ResultData
AS ( SELECT IL.id
     FROM   IdList IL
     EXCEPT
     SELECT B.BatchNumber
     FROM   @Batches B )
SELECT STUFF((   SELECT   ', ' + CAST(RD.id AS VARCHAR(MAX))
                 FROM     ResultData RD
                 ORDER BY RD.id
                 FOR XML PATH('')) ,
             1 ,
             2 ,
             '') AS ResultString;

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Where @Parameter is the value you pass to an appropriate stored procedure based on the above SELECT statement.

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ste5anSenior DeveloperCommented:
btw, the VB approach would be simply looping over your dataset, e.g. something like

ids = "," & Replace(ids, " ", "") & ","
For Each Row As DataRow in SomeTable.Rows ' However you Dataset/Table structure is named
  ids = Replace(ids, "," & Row[BatchNumber], "")
Next

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Ryan ChongBusiness Systems Analyst , ex-Senior Application EngineerCommented:
based on my understanding for the requirement and referring to sample of Stefan in ID: 42431385, shouldn't that INTERSECT should be used instead of EXCEPT?

provided:

INSERT INTO @Batches ( BatchNumber )
VALUES ( 1 ) ,
       ( 5 ) ,
       ( 7 ) ,
       ( 9 );

DECLARE @Parameter VARCHAR(MAX) = '1,3,5,7';

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ste5anSenior DeveloperCommented:
@Ryan, indeed.. misinterpret the OP's requirement.
Larry Bristersr. DeveloperAuthor Commented:
Sorry for late get back
Thanks
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