asp.net - 从虚拟文件夹中检索文件

Question

我有一个相当简单的任务，从 ASP.Net Web 应用程序外部的虚拟文件夹中检索图像文件(虚拟文件夹位于网站的根目录中)，然后将其显示在图像控件中。我能够访问网站内的虚拟文件夹。这是我的代码

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Dim sourcefile As String = Server.MapPath("~/Common/Images/LAPDPatch.jpg")
    Image1.ImageUrl = sourcefile
End Sub

我做错了什么？

好吧，我能弄清楚:

解决方案

好的，我能够让它工作，我使用了错误的“斜杠”字符，我使用的是正斜杠而不是反斜杠:

Dim sourcefile As String = Server.MapPath("\VitualFolderName\") & "Images\LAPDPatch.jpg"

感谢所有回复的人!

Answer 1

使用ResolveUrl:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    'root of currently running app, virtual or not
    Dim sourcefile As String = Page.ResolveUrl("~/Common/Images/LAPDPatch.jpg")

    'root of site
    'Dim sourcefile As String = "/Common/Images/LAPDPatch.jpg"

    'root of another site
    'Dim sourcefile As String = "/VirtualDir/Common/Images/LAPDPatch.jpg"

    Image1.ImageUrl = sourcefile
End Sub