sum of manually selected rows of datagridview

[petrogeo]

Hi all,

I have a datagridview on my desktop application, what I need is to show in a a textbox the sum of collums values, of rows selected manually. Is this possible??????
Can you guys help me on this?

[.paul.]

which columnIndex contains the numeric value?

[.paul.]

try this (uses column 0):

Private Sub DataGridView1_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DataGridView1.SelectionChanged
    TextBox1.Text = (From row As DataGridViewRow In DataGridView1.Rows.Cast(Of DataGridViewRow)() _
                     Where row.Selected = True _
                     Select CInt(row.Cells(0).Value)).Sum.ToString
End Sub

[Ram2Curious]

The DataTable.Compute Method might help.

[petrogeo]

Very good guys, it worked very well, thanks a lot.