如何按文件类型过滤 [英] How to Filter by file type

问题描述

所以我有一个FileUpload控件如何只对excel文件进​​行过滤？现在它有选项All Files（*。*），我只需要像（.xls）和（.xlsx）

So I have a FileUpload control how to make it filter only for excel files? Now it has option All Files (*.*) and I need to be like (.xls) and (.xlsx) only

<asp:FileUpload ID="FileUpload1" runat="server" />

推荐答案

您可以在以下链接中找到您的解决方案..

http://stackoverflow.com/questions/2506821/filter-the-file-type-with-文件上传控件 [ ^ ]

http://forums.asp.net/t/1156963.aspx？如何+ +过滤+文件+ +文件+上传+ HTML +控制 [ ^ ]

you find your solution on below links..
http://stackoverflow.com/questions/2506821/filter-the-file-type-with-the-file-upload-control[^]
http://forums.asp.net/t/1156963.aspx?How+to+filter+files+in+file+upload+HTML+control[^]

没有直接的方法。但你可以调用一个 JavaScript 函数 onchange 事件，并在该事件中验证扩展名。



参考 - FileUpload - 过滤文件类型/文件扩展名/文件大小 [ ^ ]



您也可以尝试这种方法 [ ^ ]，建议使用 RegularExpressionValidator 。

There is no direct method. But you can call one JavaScript function onchange event and inside that event validate the extension.

Refer - FileUpload - Filter File Type/File Extension/File Size[^]

You can also try this method[^], which suggests to use RegularExpressionValidator.

试试这个。 :)

try this. :)

string NameString = Path.GetExtension(FileUpload1.FileName);

           if (NameString == ".xls" || NameString == ".xlsx")
           {
               //Your code

           }
           else
           {

               //Select Excel File only
           }

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