select value from combobox to datagridview

[fugio]

hi all
I have an exercise
when I select the value in the combobox will confirm the value on datagridview
I wrote a code in combobox of from1

 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
         Dim sQry As String
        sQry = "SELECT Name FROM dtaStudent"
        Dim con As SqlConnection = New SqlConnection(sqldb.ConnectionString)
        Dim da As SqlDataAdapter = New SqlDataAdapter(sQry, con)
        Dim dt As DataTable = New DataTable()
        da.Fill(dt)
        ComboBox1.DisplayMember = "Name"
        ComboBox1.ValueMember = "ID"
        ComboBox1.DataSource = dt
        ComboBox1.Focus()
    End Sub
  Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        'code
        form2.ShowDialog()
    End Sub

http://s27.postimg.org/4blpooo8j/Untitled.jpg

I wrote a code in datagridview of from2

Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim sqlQuery As String = "SELECT ID,Name from dtaStudent "
Dim conn As SqlConnection = New SqlConnection(sqldb.ConnectionString)
conn.Open()
Dim da As SqlDataAdapter = New SqlDataAdapter(sqlQuery, conn)
Dim dt As DataTable = New DataTable()
da.Fill(dt)
DataGridView1.DataSource = dt
End Sub

http://s26.postimg.org/sc7097pcp/Untitled1.jpg

put value on combobox is name
when selected value
if datagridview cell is empty it will error
I want to select the ID instead of Name
because ID is always fixed
but do not know how
expect people to help

[Daemon_CC]

When you add the row, you should be able to just access the cell which is the ComboBoxCell and set the value property. Here's a quick example which assumes that column 0 is the combo box:

'First, get the cell as a useful object
'You'll need to know the index of the new row
Dim CBox as DataGridViewComboBoxCell = CType(DGV.Rows(NewRowIndex).Cell(0), DataGridViewComboBoxCell)
Dim CCol as DataGridViewComboBoxColumn = CType(DGV.Columns(0)), DataGridViewComboBoxColumn)

CBox.Value = CCol.Items(CCol.Items.Count - 1)