insert data to access database

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VB

MS-Access

database

, +

Hello
I make function to save data from datagridveiw to Access data Base

Private Function SD()
    Dim I As Integer
    For I = 0 To Me.DataGridView1.Rows.Count - 1
        Me.VendorLongBillTableAdapter1.Insert(Me.DataGridView1.Item(0, I).Value, Me.DataGridView1.Item(1, I).Value, Me.DataGridView1.Item(2, I).Value, Val(Me.DataGridView1.Item(3, I).Value), Val(Me.DataGridView1.Item(5, I).Value), Val(Me.DataGridView1.Item(4, I).Value) * Val(Me.DataGridView1.Item(3, I).Value), Val(HowIPaid.Text), Val(HowStill), Me.DataGridView1.Item(7, I).Value, Convert.ToDateTime(Me.DataGridView1.Item(6, I).Value))
        'TODO: This line of code loads data into the 'RAFAADataSet.Prudects' table. You can move, or remove it, as needed.
    Next
End Function

but when I use this function error happened

Argument 'Expression' cannot be converted to type 'TextBox'

where is the error ?