打印我从两个DateTimePicker

Question

所以感谢Mych完成了我的DateTimePicker！还有我们老师要我们做的另一个问题。使用两个DateTimePicker从范围获取结果后，我们需要打印结果。这是我的代码。 If Then语句似乎存在问题。

错误说明：

  

运营商＆＃39; =＆＃39;未定义类型＆＃39; DataTable＆＃39;并输入＆＃39; BindingSource＆＃39;。

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    PrintDocument1.Print()

End Sub

Private Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click
    Dim dt As New DataTable
    If dt = DataGridView1.DataSource Then
        PrintPreviewDialog1.ShowDialog()

    End If
End Sub

Private Sub PrintDocument1_PrintPage(sender As Object, e As Printing.PrintPageEventArgs) Handles PrintDocument1.PrintPage
    e.Graphics.DrawString(DataGridView1.DataSource, Font, Brushes.Black, 100, 100)

End Sub