How to show a running total column of monthly datagridview amounts

Software: & sql server 2005
I have a datagridview showing monthly amounts that I want to add a Year to Date Column:
Sample code would be appreciated...

  Month        Amount   Year to Date
| Jan-2010 | 1000.00 |       1000.00 |
| Feb-2010 | 1000.00 |       2000.00 |

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Handle the CellValueChanged event, eg

Private Sub DataGridView1_CellValueChanged(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellValueChanged

    'this array contains the indexes of columns NOT including the Year to Date
    If {0, 1}.Contains(e.ColumnIndex) Then
        'note the columns are 1 and 2 to fit your example, change to suit your actual needs
        Dim tValue = Me.DataGridView1.Item(0, e.RowIndex).Value + Me.DataGridView1.Item(1, e.RowIndex).Value
        Me.DataGridView1.Item(2, e.RowIndex).Value = tValue
    End If
End Sub

You can always add your data-validation on the values BEFORE attempting to add them!
How do you populate the DGV? using a stored procedure? Show us the query.
dave_skyAuthor Commented:

My knowledge is limited on some of the basic terminology.

Would Query be: Binding source with table adapter?

I am not using a stored procedure.
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dave_skyAuthor Commented:

Would you mind extending your previous code for additional months?

Month        Amount   Year to Date
| Jan-2010 | 1000.00 |       1000.00 |
| Feb-2010 | 1000.00 |       2000.00 |
| Mar-2010 | 1000.00 |       3000.00 |
| Apr-2010 | 1000.00 |       4000.00 |

On {0, 1} of your previous code, I am getting an error message of an "Expression expected". I have tried all the changes that I know of with no luck.

dave_skyAuthor Commented:

I am using drag and drop from the dataset wizard. Not writing all of the code...
Not sure why you aregetting the error, my guess is you are using and "older" .net, try:

If {0, 1}.Contains(e.ColumnIndex) =True Then

The code should work for all months, its only limited by the columns, which in your case are three.
You'll need to have your dataGridView allow user to add new rows

    Dim tValue = Nothing
    If {1}.Contains(e.ColumnIndex) Then
        For x = 0 to Me.DataGridView1.RowCount - 1
           tValue = Me.DataGridView1.Item(1, x).Value + tValue
        Me.DataGridView1.Item(1, Me.DataGridView1.RowCount - 1
).Value = tValue
    End If
End Sub

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