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我的CSS文件,我在我的App_Themes文件/默認/文件夾兩個樣式表:BaseStylesheet.css和NonConvert.css回傳問題緩存猛擊我的App_Themes文件夾
下面是我對我的例子Web窗體的代碼。我將LastModifiedDate添加到我的App_Themes文件夾中每個CSS文件的末尾。更新後,LastModifiedDate會自動更新。
Protected Sub Page_PreRender(sender As Object, e As EventArgs) Handles Me.PreRender
'CACHING - Add a LastModifiedDate to all CSS files in the App_Themes directory
Dim link As HtmlLink = Nothing
For Each c As Control In Header.Controls
If TypeOf c Is HtmlLink Then
link = TryCast(c, HtmlLink)
If link.Href.IndexOf("App_Themes/", StringComparison.InvariantCultureIgnoreCase) >= 0 AndAlso link.Href.EndsWith(".css", StringComparison.InvariantCultureIgnoreCase) Then
link.Href += String.Format("?t={0}", GetLastModifiedDateString(link.Href))
End If
End If
Next
End Sub
Public Shared Function GetLastModifiedDateString(ByVal filePath As String) As String
Dim fileInfo As New IO.FileInfo(System.Web.HttpContext.Current.Server.MapPath(filePath))
If fileInfo.Exists Then
Return String.Format("{0:yyyyMMddHHmmss}", fileInfo.LastWriteTimeUtc)
End If
Return String.Empty
End Function
這兩種方法工作得很好。 HTML輸出如下:
<link href="../../App_Themes/Default/BaseStyleSheet.css?t=20140228192910" type="text/css" rel="stylesheet" />
<link href="../../App_Themes/Default/NonConvert.css?t=20140228175530" type="text/css" rel="stylesheet" />
當我添加一個按鈕,做回發,這是我的HTML輸出:
<link href="../../App_Themes/Default/BaseStyleSheet.css?t=20140228192910" type="text/css" rel="stylesheet" />
<link href="../../App_Themes/Default/BaseStyleSheet.css?t=20140228192910" type="text/css" rel="stylesheet" />
我缺少什麼?在viewstate保存之前,我是否必須刪除querystrings?