C#、VB遍历控件并赋值

 C#遍历控件并赋值：

foreach (Control ct in form1.Controls)
{
if (ct is TextBox ) {
(ct as TextBox).Text = "";
}
if (ct is DropDownList) {
(ct as DropDownList).SelectedValue = "";
}
}

VB遍历控件并赋值：

For Each ct As Control In Me.Controls
If TypeOf ct Is TextBox Then
CType(ct, CheckBox).Text = ""
End If
Next