Dim cd As SqlCommandBuilder = New SqlCommandBuilder(adapter)
        adapter = New SqlDataAdapter("select c.cid,c.CompanyName,d.dtId,d.dtName as Department,d.dtPhone as Phone,d.dtEmail as Email,d.empimage as Image from CompanyMaster_tbl c join  DepartmentMaster_tbl d on c.Cid=d.cId order by cid", con.connect)
        dt1 = New DataTable
        bSource = New BindingSource
        adapter.Fill(dt1) 'Filling dt with the information from the DB
        bSource.DataSource = dt1
        gv.DataSource = bSource
        gv.Columns("cid").Visible = False
        gv.Columns("dtId").Visible = False

Dim btn As New DataGridViewButtonColumn
        gv.Columns.Insert(6, btn).

Dim btn As New DataGridViewButtonColumn
btn.HeaderText = "Click Data"
btn.Text = "Click Here"
btn.Name = "btn"
btn.UseColumnTextForButtonValue = True
gv.Columns.Insert(6, btn)