How merge the result(datatable) obtained form each of the background process

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In the below code i have created the background process dynamically,My question is how to combine or Merger the datatable obtained from each of the background processes , Is there any way to make the below code work

What I have tried:

For Each value In intersect
                NumWorkers = NumWorkers + 1
                'MessageBox.Show(NumWorkers.ToString)
                ReDim Workers(NumWorkers)
                Workers(NumWorkers) = New BackgroundWorker
                Workers(NumWorkers).WorkerReportsProgress = True
                Workers(NumWorkers).WorkerSupportsCancellation = True
                AddHandler Workers(NumWorkers).DoWork, AddressOf WorkerDoWork
                Workers(NumWorkers).RunWorkerAsync(value)
                AddHandler Workers(NumWorkers).RunWorkerCompleted, AddressOf WorkerCompleted
            Next

 Private Sub WorkerDoWork(sender As Object, e As System.ComponentModel.DoWorkEventArgs)

         objclient.From_date = From_Date.Value.ToString("MM/dd/yyyy")
        objclient.To_date = To_Date.Value.ToString("MM/dd/yyyy")
        objclient.Connection_String = e.Argument
        ds = objclient.FileCompleted()
        ds.merger(ds)

    End Sub

Posted 11-Apr-18 2:32am

sathishvegeta

Updated 11-Apr-18 7:21am

Wendelius

v5

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Wendelius · Answer 1 · 2018-04-11T07:22:00

If I understand your question correctly, one quite brute-force way would be that you store the 'main' data table outside the background workers, perhaps in a static field.

In the end of each worker, use DataTable.Merge Method (System.Data)[^] to merge the data tables. Just remember to use SyncLock Statement | Microsoft Docs[^] to prevent simultaneous merge operations