Question

I have a StringBuilder I am using and I add to it from a loop that goes through a DataGridView. What I need to do is separate the strings if there are more than one with a “, “. Then I set a label’s text from the StringBuilder. Below is a working example without the comma’s…

THIS IS THE UPDATED VERSION THAT WORKS GREAT NOW….

    Dim strUnits As New System.Text.StringBuilder
    Dim lineCount As Integer = 0

   For i = 0 To dgvLowInventory.RowCount - 1
        If dgvLowInventory.Rows(i).Cells(1).Value Is DBNull.Value Or dgvLowInventory.Rows(i).Cells(2).Value Is DBNull.Value Then
            'Skip
        Else
            If lineCount >= 1 Then
                strUnits.Append(", ")
                strUnits.Append("[" & dgvLowInventory.Rows(i).Cells(1).Value & " - " & dgvLowInventory.Rows(i).Cells(3).Value & "]")
                lineCount += 1
            Else
                strUnits.Append("[" & dgvLowInventory.Rows(i).Cells(1).Value & " - " & dgvLowInventory.Rows(i).Cells(3).Value & "]")
                lineCount += 1
            End If
        End If
    Next

    lblTestString.Text = strUnits.ToString()

Answer 1

Keep a counter, starting at 0.

Add 1 to the counter every time you append, after you append.

Before appending, if the counter is greater than 0, append a ", " before appending the string.

Alternatively, use String.Join with ", ", depending on what language you are programming in there’s usually an equivalent to this.
http://msdn.microsoft.com/en-us/library/57a79xd0.aspx