请问如何实现在combobox里面选一个选项，它下面的只读textbox就显示对应项的相关信息，请问代码如何实现,我试用过这样一行代码
Private Sub cmbgoodsnumber2_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmbgoodsnumber2.SelectedIndexChanged
  Me.BindingContext(Mydataset1.进货表).Position = cmbgoodsnumber2.SelectedIndex
不知为何实现不了
请懂的帮帮忙

TextBox1.Text = ComboBox1.SelectedItem.ToString

请问TextBox1.Text = ComboBox1.SelectedItem.ToString这句应该放在那里？？我直接放在Private Sub cmbgoodsnumber2_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmbgoodsnumber2.SelectedIndexChanged中，运行的时候对应的textbox显示
System.Dat，不知道为什么