显示保存文件对话框中的Asp.net网页

我有一个文件写入到本地磁盘一个ASP.net页面。

I have a ASP.net page which writes a file to the local disk.

我要present用户保存文件对话框，允许他设置文件夹的路径。

I want to present the user a Save File dialog box and allow him to set the path to the folder.

我知道code下面一样可以使用;

I know code like below can be used;

Response.Clear();
Response.ContentType = "text/csv";
Response.AddHeader( "Content-Disposition", "attachment;filename=\"report.csv\"" );
// write your CSV data to Response.OutputStream here
Response.End();

但它修复文件路径。

But it fixes filepath.

我需要用户选择捕获的文件路径。
这有可能在ASP.net？

I need to capture the filepath that the user selects. Is that possible in ASP.net?

感谢。