文件，擴展名的.msg不下載

Question

我有下面的代碼：

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() 

我能夠下載帶有.xls和的.xlsx文件，但.msg文件的文件會給找不到網頁的錯誤。這些文件存儲在附件文件夾中，示例文件路徑看起來像http://our.domain.com/Attachment/2017123456 Demo_Re.msg（空間是文件名的一部分，對於.xls和.xlsx文件不是問題）。

有人能告訴我我錯過了什麼。

Answer 1

打開IIS，爲您的網站

選擇HTTP頭選擇屬性 - >點擊MIME類型 - >點擊新建並添加「味精」的延伸和‘應用/ vsd.ms-展望’爲MIME類型。