ASP.Net, c#， iis, mime类型，文件上传条件

本文关键字：文件 类型 条件 mime Net iis ASP | 更新日期: 2023-09-27 18:08:16

我在网站上有一个文件上传web-form，它只需要接受某些格式(或MIME类型)…

下面的代码是完美的工作，除了，它不上传。docx文件到服务器!这是唯一不工作的文件类型…我仔细检查了每一行代码，甚至进入IIS管理器以确保.DOCX MIME类型被继承，并且它们是…

有没有人知道为什么。docx文件不会像其他文件类型一样上传到服务器?

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."; 
    }

ASP.Net, c#， iis, mime类型，文件上传条件

看这个答案，它指向这个页面。

DOCX Mime Type: 
application/vnd.openxmlformats-officedocument.wordprocessingml.document
编辑:

抱歉，我没在单子上看到。如果你想允许DOCX，为什么不直接检查"。DOCX"作为扩展名。

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

您应该阅读扩展，而不是检查mime类型。MIME类型由浏览器设置，在不同的计算机之间可能会有所不同。这不是他们的目的。

同样，不管你来自什么背景，如果你有一个这样的if声明，你至少应该感到一点点羞耻。

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

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