在ASP.NET2.0如何从呈现的页面/控件输出中删除额外的制表符和换行符?

Here is an example .

嗯,我试过了,而且很管用……但是。。。。

即使我只能用这个方法删除50%的空白,它仍然会为正则表达式留下更少的工作——这意味着它应该比单独使用正则表达式表现得更好。

2. 将换行符属性设置为空字符串
4. 重写Indent属性并返回0

我还尝试重写RenderChildren、Render、BeginRender和EndRender以传入我的自定义HtmlTextWriter,但我似乎无法使一个简单的label控件在其标记之前移除选项卡。我还使用Reflector深入研究了这个框架,但我根本不知道这些角色是如何生成的——我以为我使用的是“一网打尽”的方法,但显然我遗漏了一些东西。

不管怎样,这是我想到的。这个代码没有按我希望的方式运行。当然,我也尝试过直接重写页面上的各种呈现方法,并传入一个自定义HtmlTextWriter的实例,但也没有成功。

Public Class PageCompressorControlAdapter
    Inherits System.Web.UI.Adapters.ControlAdapter

    Protected Overrides Sub RenderChildren(ByVal writer As System.Web.UI.HtmlTextWriter)
        MyBase.RenderChildren(New CompressedHtmlTextWriter(writer))
    End Sub

    Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter)
        MyBase.Render(New CompressedHtmlTextWriter(writer))
    End Sub

    Protected Overrides Sub BeginRender(ByVal writer As System.Web.UI.HtmlTextWriter)
        MyBase.BeginRender(New CompressedHtmlTextWriter(writer))
    End Sub

    Protected Overrides Sub EndRender(ByVal writer As System.Web.UI.HtmlTextWriter)
        MyBase.EndRender(New CompressedHtmlTextWriter(writer))
    End Sub

End Class

Public Class CompressedHtmlTextWriter
    Inherits HtmlTextWriter

    Sub New(ByVal writer As HtmlTextWriter)
        MyBase.New(writer, "")
        Me.InnerWriter = writer.InnerWriter

        Me.NewLine = ""
    End Sub

    Sub New(ByVal writer As System.IO.TextWriter)
        MyBase.New(writer, "")
        MyBase.InnerWriter = writer

        Me.NewLine = ""
    End Sub

    Protected Overrides Sub OutputTabs()
        'Skip over the tabs
    End Sub

    Public Overrides Property NewLine() As String
        Get
            Return ""
        End Get
        Set(ByVal value As String)
            MyBase.NewLine = value
        End Set
    End Property


    Public Overrides Sub WriteLine()

    End Sub

    Public Overrides Sub WriteLine(ByVal value As Boolean)
        MyBase.Write(value)
    End Sub

    Public Overrides Sub WriteLine(ByVal value As Char)
        MyBase.Write(value)
    End Sub

    Public Overrides Sub WriteLine(ByVal buffer() As Char)
        MyBase.Write(buffer)
    End Sub

    Public Overrides Sub WriteLine(ByVal buffer() As Char, ByVal index As Integer, ByVal count As Integer)
        MyBase.Write(buffer, index, count)
    End Sub

    Public Overrides Sub WriteLine(ByVal value As Decimal)
        MyBase.Write(value)
    End Sub

    Public Overrides Sub WriteLine(ByVal value As Double)
        MyBase.Write(value)
    End Sub

    Public Overrides Sub WriteLine(ByVal value As Integer)
        MyBase.Write(value)
    End Sub

    Public Overrides Sub WriteLine(ByVal value As Long)
        MyBase.Write(value)
    End Sub

    Public Overrides Sub WriteLine(ByVal value As Object)
        MyBase.Write(value)
    End Sub

    Public Overrides Sub WriteLine(ByVal value As Single)
        MyBase.Write(value)
    End Sub

    Public Overrides Sub WriteLine(ByVal s As String)
        MyBase.Write(s)
    End Sub

    Public Overrides Sub WriteLine(ByVal format As String, ByVal arg0 As Object)
        MyBase.Write(format, arg0)
    End Sub

    Public Overrides Sub WriteLine(ByVal format As String, ByVal arg0 As Object, ByVal arg1 As Object)
        MyBase.Write(format, arg0, arg1)
    End Sub

    Public Overrides Sub WriteLine(ByVal format As String, ByVal arg0 As Object, ByVal arg1 As Object, ByVal arg2 As Object)
        MyBase.Write(format, arg0, arg1, arg2)
    End Sub

    Public Overrides Sub WriteLine(ByVal format As String, ByVal ParamArray arg() As Object)
        MyBase.Write(format, arg)
    End Sub

    Public Overrides Sub WriteLine(ByVal value As UInteger)
        MyBase.Write(value)
    End Sub

    Public Overrides Sub WriteLine(ByVal value As ULong)
        MyBase.Write(value)
    End Sub

End Class

如果您不熟悉控制适配器,只需将下面的xml放在ASP.NET应用程序浏览器文件夹。您可以更改controlType以将控件适配器应用于标签或其他用于较小测试范围的内容。如果我能让它工作,在这里添加我的项目中的所有控件并不是什么大事,如果有必要的话。

<browsers>

    <browser refID="Default">
        <controlAdapters>
            <adapter controlType="System.Web.UI.Page"
                     adapterType="PageCompressorControlAdapter"/>
        </controlAdapters>
    </browser>

</browsers>

不管怎样,您可能会认为只有一个简单的配置设置,比如VerboseHtml=“false”或PreserveHtmlFormatting=“false”或类似的内容。如果你看看MSN.com网站,他们正在使用类似于这样的压缩方式…而且它看起来性能非常好。