c# Web Application 中使用FileUpload代替OpenFileDialog

cited

OpenFileDialog is for windown forms
application, I am not sure what you intended to do whether you want to
upload file or do other thing.

Simply you can use file upload, If you want to dialog box to open, you can use either HTML input file type or <asp:FileUpload

ex:

<input type="file" id="fleUpload" runat="server" />

or

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

Happy coding