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visual studio 2012 - multiple for loops

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my question is this. I have a project that moves and renames files based on certain criteria. It will search through all client files or if you type in a single client code it should only search through that clients files and then move out of the for loop.

Here is a sample of my code. It looks at the single clients files but after that goes into the for loop searching all client files. How do I make it skip searching all files ONLY IF THE SINGLE CLIENT is selected?

Code:

  Public Sub btn_SearchMdocs_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_SearchMdocs.Click
        Try

            Dim quarter As String = tb_QuarterSelected.Text
        If (quarter) = 0 Then
            MsgBox("Please select a quarter before continuing.")
            Exit Sub
        End If
        'defines what to look for in file name
        Dim pattern As String = "*" & quarter & "*"

        'sets file directories to move files from/to
        Dim QtrsourceDir As String = G.StoreroomDirectory
        Dim QtrdestDir As String = G.StagingDirectory
        QtrdestDir = QtrdestDir.Replace("\\", "\\")
            Dim fileCount As Integer = 0
            Dim singlefilecount As Integer = 0
            Dim sw As StreamWriter = New StreamWriter("\\cps1\m3\electronicquarterlyw2logs\CopiedFiles\" & "CopiedFilesLog_" & Date.Today.ToString("MM_dd_yy") & ".txt", True)

        'finds files, numbers them and then copies them if they are not in secureview company set
            For Each f As String In Directory.EnumerateFiles(QtrsourceDir, pattern, SearchOption.AllDirectories)
                Dim fileName As String = Path.GetFileName(f)
                Dim ind As Integer = fileName.IndexOf("_" & quarter)
                Dim code As String = fileName.Substring(0, ind)
                Dim destFile As String = QtrdestDir & code & fileName.Substring(ind)
                If code = tb_singlecocode.Text Then
                    sw.WriteLine(DateTime.Now.ToString & "_" & fileName)
                    File.Copy(f, destFile)
                    singlefilecount = singlefilecount + 1
                End If
            Next
            sw.Close()

            'make sure that the co code is not in secureview co set
            For Each item As Object In lb_M3test.Items
                For Each f As String In Directory.EnumerateFiles(QtrsourceDir, pattern, SearchOption.AllDirectories)
                    Dim fileName As String = Path.GetFileName(f)
                    Dim ind As Integer = fileName.IndexOf("_" & quarter)
                    Dim code As String = fileName.Substring(0, ind)
                    Dim destFile As String = QtrdestDir & code & fileName.Substring(ind)
                    If item.ToString = code Then
                        File.Copy(f, destFile)
                        sw.WriteLine(DateTime.Now.ToString & "_" & fileName)
                        'sw.Close()
                        fileCount = fileCount + 1
                    End If
                Next
            Next


            sw.Close()

            If singlefilecount > 0 Then
                MessageBox.Show(singlefilecount & " files were copied", "Copy Files", MessageBoxButtons.OK)
            Else
                MessageBox.Show(fileCount & " files were copied", "Copy Files", MessageBoxButtons.OK)
            End If
            tb_CountMDOC.Text = fileCount

        Catch ex As Exception
            MessageBox.Show(ex.Message)

        End Try
    End Sub

any help would be awesome!! Thank you in advance.

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