expression column in unbound datagridview

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Hi friends
I new to using datagridview.I am trying to make a data entry form using an unbound dgv in which I have added columns and row using code but I have difficulty on how to calculate between columns.
I can do it if I add the columns in design time .I would like to know if it is possible to add expression column or calculates between two columns when i add columns and rows like this.

VB

Dim dt As New DataTable
        dt.Columns.Add("col1")
        dt.Columns.Add("col2")
        dt.Columns.Add("col3")
        dt.Columns.Add("col4")
        dt.Columns.Add("total")

        dt.Rows.Add("")
        dt.Rows.Add("")
        dt.Rows.Add("")
        dt.Rows.Add("")

        Me.DataGridView1.DataSource = dt
        dt.Columns("total").Expression = "[col2]+[col3]"

Posted 11-Dec-12 20:08pm

josef088

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dnbavadiya · Accepted Answer · 2013-02-12T19:09:00

VB

Try this

        Dim dt As New DataTable
        dt.Columns.Add("col1")
        dt.Columns.Add("col2")
        dt.Columns.Add("col3")
        dt.Columns.Add("col4")
        dt.Columns.Add("total")

        dt.Rows.Add("")
        dt.Rows.Add("")
        dt.Rows.Add("")
        dt.Rows.Add("")
 dt.Columns("total").Expression = "[col2]+[col3]"
 Me.DataGridView1.DataSource = dt