迴圈處理畫面上的元件

當畫面上有多個元件 程式要同時塞值進去時，就可使用迴圈控制 不需要指定個別元件給值 '畫面上有4個TextBox

Dim txt() As String = {"TextBox1", "TextBox2", "TextBox3", "TextBox4"}
Dim txt1(txt.Length) As TextBox
For i As Integer = 0 To txt.Length - 1
txt1(i) = form1.FindControl(txt(i))
txt1(i).Text = i
Next