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?

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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.