迭代“MainContents”中的每个文本框控件？

Question

我可以使用下面的代码迭代“MainContents”中的每个文本框控件。 Q1：有更短的路吗？ （获取“MainContents”中的所有控件？）

    For Each ctrl As Control In Page.Controls
        For Each subctrl As Control In ctrl.Controls
            For Each subctrlsub As Control In subctrl.Controls
                If TypeOf subctrlsub Is System.Web.UI.WebControls.ContentPlaceHolder Then
                    If subctrlsub.ClientID = "MainContent" Then
                        For Each ct As Control In subctrlsub.Controls
                            If TypeOf ct Is System.Web.UI.WebControls.TextBox Then
                                For r As Short = 1 To 8
                                    For c As Short = 1 To 6
                                        .... (do something) ...
                                    Next
                                Next
                            End If
                        Next
                    End If
                End If
            Next
        Next
    Next

Answer 1

我将其从 C# 转换为 VB，请原谅潜在的错误。这称为递归。

Protected Sub DoSomething(ctrl As Control)
   For Each c As Control In ctrl.Controls
       If TypeOf c Is ContentPlaceHolder Then
          If c.ClientID = "MainContent" Then
                           // Do your stuff
          End If
       End If

       If c.Controls.Count > 0 Then
          DoSomething(c)
       End If
   Next
End Sub