asp.net – 自定义HttpHandler错误：无法加载类型’FileProtecti

自定义处理程序是为了保护人们不要下载某些文件类型,虽然我认为错误是一些配置问题,因为一旦我将httpHandlers添加到Web.Config文件,我就无法使网站工作.

Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Could not load type 'FileProtectionHandler'.

Source Error:

Line 47:         </compilation>
Line 48:         <httpHandlers>
Line 49:             <add verb="*" path="*.pdf" type="FileProtectionHandler"/>
Line 50:         </httpHandlers>

如果您需要更多代码,请告诉我们.

谢谢你的帮助. J.

<%@ WebHandler Language="VB" Class="FileProtectionHandler" %>

Imports System
Imports System.Web
Imports System.Web.Security
Imports System.IO
Imports System.Web.SessionState

Public Class FileProtectionHandler : Implements IHttpHandler

    Private Function SendContentTypeAndFile(ByVal context As HttpContext,ByVal strFile As [String]) As HttpContext
        context.Response.ContentType = GetContentType(strFile)
        context.Response.TransmitFile(strFile)
        context.Response.[End]()
        Return context
    End Function

    Private Function GetContentType(ByVal filename As String) As String
        ' used to set the encoding for the reponse stream
        Dim res As String = Nothing
        Dim fileinfo As New FileInfo(filename)

        If fileinfo.Exists Then
            Select Case fileinfo.Extension.Remove(0,1).ToLower()
                Case "pdf"
                    If True Then
                        res = "application/pdf"
                        Exit Select
                    End If
            End Select

            Return res
        End If

        Return Nothing
    End Function

    Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
        context.Response.ContentType = "text/plain"
        context.Response.Write("Hello World")
    End Sub

    Public ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable
        Get
            Return False
        End Get
    End Property

End Class