0

请看下面的代码：

Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim c1 As New CheckBox
        c1.ID = "Test1/" 'line 7
        PlaceHolder1.Controls.Add(c1)
    End Sub

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        For Each c As Control In Page.Controls
            For Each d As Control In c.Controls
                For Each f As Control In d.Controls
                    For Each g As Control In f.Controls
                        For Each h As Control In g.Controls
                            If TypeOf h Is CheckBox Then
                                Dim cbox As New CheckBox
                                cbox = CType(h, CheckBox)
                                MsgBox(cbox.Checked) 'Line 20
                            End If
                        Next
                    Next
                Next
            Next
        Next
    End Sub
End Class

default.aspx 页面上有一个占位符，名为：PlaceHolder1。第 20 行的 MessageBox 正在打印 True。请查看以下网页中的引用：http: //msdn.microsoft.com/en-us/library/system.web.ui.control.id.aspx

“只有字母数字字符和下划线字符 (_) 的组合是此属性的有效值。包含空格或其他无效字符将导致 ASP.NET 页面解析器错误。”

/ 不是字母数字字符，那么消息框怎么打印为真呢？如果将第 7 行更改为 : c1.ID = "Test1:"，那么这会像我预期的那样打印为 false （因为 : （冒号）不是字母数字）。没有一致性。我错过了一些东西。

4

0 回答 0