In ASP.NET, how to get the browser to download string content into a file? (C#)

Question

I would like to create a text file for export/download, like a *.csv, from an ASP.NET application. I know about Response.TransmitFile, but I want to do this without creating

Answer 1

When you say "Create a file for export", I am understanding that you want to make it downloadable to the browser. If that's the case, here's an example.

public void btnGo_Click (Object sender, EventArgs e)
{
    Response.Clear();

    string fileName= String.Format("data-{0}.csv", DateTime.Now.ToString("yyyy-MMM-dd-HHmmss")); 
    Response.ContentType = "text/csv";
    Response.AddHeader("content-disposition", "filename=" + fileName);

    // write string data to Response.OutputStream here
    Response.Write("aaa,bbb,ccc\n");

    Response.End();
}

cite: RFC 4180