文件，扩展名的.msg不下载

Question

我有下面的代码：

Dim filePath As String = Request.QueryString("FilePath") 
    Dim fileName As String = filePath.Substring(filePath.LastIndexOf("/") + 1) 
    Dim ext As String = Path.GetExtension(fileName) 
    'If (ext = ".xls") Then 
    ' Response.ContentType = "application/vnd.ms-excel" 
    'ElseIf (ext = ".xlsx") Then 
    ' Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" 
    'End If 
    If ext = ".msg" Then 
     Response.ContentType = "application/octet-stream" 
     'Response.ContentType = "application/vnd.ms-outlook" 
    ElseIf (ext = ".xls") Then 
     Response.ContentType = "application/vnd.ms-excel" 
    ElseIf (ext = ".xlsx") Then 
     Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" 
    End If 
    'fileName = Server.MapPath("~\\files\\RAP_Batch_Upload_form.xls") 
    Response.AppendHeader("Content-Disposition", "attachment;filename=" & fileName) 
    'Response.AddHeader("Content-Length", New System.IO.FileInfo(fileName).Length) 
    'Response.AddHeader("Content-Length", New System.IO.FileInfo("Batch_test_11.xlsx").Length) 
    Response.Redirect(filePath) 
    Response.End() 

我能够下载带有.xls和的.xlsx文件，但.msg文件的文件会给找不到网页的错误。这些文件存储在附件文件夹中，示例文件路径看起来像http://our.domain.com/Attachment/2017123456 Demo_Re.msg（空间是文件名的一部分，对于.xls和.xlsx文件不是问题）。

有人能告诉我我错过了什么。

Answer 1

打开IIS，为您的网站

选择HTTP头选择属性 - >点击MIME类型 - >点击新建并添加“味精”的延伸和‘应用/ vsd.ms-展望’为MIME类型。