Saving the opened file in particular folder

I have a dropdownlist and a textbox. When i write some name and select some options in dropdownlist like word or excel or powerpoint, that particular file opens as an attachment and i should save it in "data" folder which is already present in the solution explorer. My code is like this

string file = TextBox1.Text;
开发者_运维知识库        if (dd1.SelectedIndex == 1)
        {
            Response.ContentType = "application/word";
            Response.AddHeader("content-disposition", "attachment;filename =" + file + ".docx");
        }

How can I store this file in "data" folder?

The simple answer is "you cannot". Saving file is taking place on the client side. Your web application knows nothing about the client machine (not even whether it's a real browser or another script) and has no control over the client. The end user will have to manually select data folder to save the file to.