ASP.NET、C#、IIS、MIME 类型、文件上传条件

Question

我在网站上有一个文件上传网络表单，它只需要接受某些格式（或 MIME 类型）...

以下代码运行良好，除了它不会将 .DOCX 文件上传到服务器！那是唯一不起作用的文件类型...我仔细检查了每一行代码，甚至进入了 IIS 管理器以确保 .DOCX MIME 类型被继承，它们是...

有人知道为什么 .DOCX 文件不会像其他文件类型那样上传到服务器吗？

代码片段：

string savePath = "D:\\HIDDEN PATH HERE";
string fileMsg;

// Before attempting to perform operations
// on the file, verify that the FileUpload 
// control contains a file.
if (FileUpload1.HasFile)
{
    // Check to see that the content type is proper and allowed.
    // DOC: application/doc, appl/text, application/vnd.msword, application/vnd.ms-word, application/winword, application/word, application/x-msw6, application/x-msword
    if (
        FileUpload1.PostedFile.ContentType == "text/rtf" ||
        FileUpload1.PostedFile.ContentType == "application/doc" ||
        FileUpload1.PostedFile.ContentType == "appl/text" ||
        FileUpload1.PostedFile.ContentType == "application/vnd.msword" ||
        FileUpload1.PostedFile.ContentType == "application/vnd.ms-word" ||
        FileUpload1.PostedFile.ContentType == "application/winword" ||
        FileUpload1.PostedFile.ContentType == "application/word" ||
        FileUpload1.PostedFile.ContentType == "application/msword" ||       
        FileUpload1.PostedFile.ContentType == "application/x-msw6" ||
        FileUpload1.PostedFile.ContentType == "application/x-msword" ||
        FileUpload1.PostedFile.ContentType == "application/pdf" ||
                        FileUpload1.PostedFile.ContentType == "application/x-pdf" ||
        FileUpload1.PostedFile.ContentType == "application/vnd.openxmlformats-officedocument.wordprocessingml.document" ||
        FileUpload1.PostedFile.ContentType == "application/vnd.openxmlformats-officedocument.wordprocessingml.template"
        )
    {
        // Get the name of the file to upload.
        String fileName = FileUpload1.FileName;

        // Append the name of the file to upload to the path.
        savePath += strnow + fileName;


        // Call the SaveAs method to save the 
        // uploaded file to the specified path.
        // This example does not perform all
        // the necessary error checking.               
        // If a file with the same name
        // already exists in the specified path,  
        // the uploaded file overwrites it.
        FileUpload1.SaveAs(savePath);

        // Notify the user of the name of the file
        // was saved under.
        //fileMsg = "Your file was saved as " + fileName;
        fileMsg = "";
    }
    else
    {
        fileMsg = "Your file was not an accepted format. Please use PDF, RTF or DOC formats."; 
    }

Answer 1

您应该阅读扩展程序，而不是检查 mime 类型。 MIME 类型由浏览器设置，并且在计算机之间可能不同。这不是他们的目的。

另外，无论你来自什么背景，如果你有这样的 if 语句，你至少应该感到一丝羞愧。

string[] acceptedExtensions = new string[] { ".docx", ".doc", ".txt", ".etc" };
// snip


if(acceptedExtensions.Contains(Path.GetExtension(FileUpload1.PostedFile.Filename))) 
{ 
    AcceptFile(FileUpload1.PostedFile);
}

Answer 2

查看this answer，它会将您指向this page。

DOCX 哑剧类型：

application/vnd.openxmlformats-officedocument.wordprocessingml.document

编辑： 抱歉，没有在列表中看到它。如果你想允许 DOCX，为什么不检查“.docx”作为扩展名。

|| FileUpload1.PostedFile.FileName.ToLower().Substring(FileUpload1.PostedFile.FileName.Length - 4) == "docx"