ASP.NET 4 FileUpload and OpenFileDialog

Asked Oct 14 '20 at 08:16

Active Oct 14 '20 at 08:24

Viewed 259 times

I use the FileUpload control to upload files to remote hosting server in C# ASPNET.

I have restrict the FileUpload control to upload a file type.

For example, I wanted to upload text file (txt) only so I put a validator, which allows txt only.

<asp:RegularExpressionValidator   
id="FileUpLoadValidator" runat="server"   
ErrorMessage="Upload Text file only."   
ValidationExpression="^(([a-zA-Z]:)|(\\{2}\w+)\$?)(\\(\w[\w].*))(.txt)$"   
ControlToValidate="FileUpload1">  
</asp:RegularExpressionValidator>

The typical Open File Dialog looks like figure below where you can see Windows Explorer like features to navigate through folders and select a file.

how to do when the browse button click event handler will show an open file dialog and users will be able to select only text files?

asked Oct 14 '20 at 08:16

Iter Lsic Iealf

Funny - i'm no expert but checking msdn it seems that this is not possible, there is no field or something for the fileupload control. – sommmen Oct 14 '20 at 08:23
Just add `accept=` – VDWWD Oct 14 '20 at 08:25
@VDWWD working! thanks... `` – Iter Lsic Iealf Oct 14 '20 at 08:35
Just remeber that you can still upload other types. So check the data in the backend for the correct file type also. – VDWWD Oct 14 '20 at 08:38

ASP.NET 4 FileUpload and OpenFileDialog

0 Answers0