你不能。 ASP.NET没有OpenFileDialog控件。为什么不使用asp：fileupload控件？

You can't. There is no OpenFileDialog Control for ASP.NET. Why don't you use asp:fileupload control?

解决方案

你可以隐藏 FileUpload 控制和按钮点击，只需触发点击（）事件。

演示

[演示]按钮上的打开文件选择框单击 [ ^ ]

Solution

You can hide the FileUpload Control and on Button Click, just trigger the click() Event.

Demo

[Demo] Open File Selection Box on Button Click[^]