在ASP.NET中正确使用Response.Write（）

Question

I am trying to force a download of an XML file when the user visits a page.

This is the code I am using

public partial class GenerateTemplate : LayoutsPageBase
{
    protected void Page_Load(object sender, EventArgs e)
    {
        //.............
        //Going about generating my XML
        //.............
        Response.ClearContent();
        Response.AddHeader("content-disposition", "attachment; filename=template.xml");
        Response.Write(xmlDoc.InnerXml);
        Response.Flush();
        Response.Close();
    }
}

I am facing a problem that my download window hangs indefinitely, without ever completing the download/Open of the file.

What am I doing wrong? Am I not disposing any objects or closing any connections here?

Answer 1

I've posted a reply to a similar question . To quote myself:

Just a small addition to the other answers. At the very end of a download I execute:

context.Response.Flush();
context.ApplicationInstance.CompleteRequest();

I learned that otherwise, the download sometimes does not complete successfully.

This Google Groups posting also notes that Response.End throws a ThreadAbortException which you could avoid by using the CompleteRequest method.

Answer 2

Try using Response.End() instead of Flush and Close

That's what I have been using in the past.

Answer 3

Have you tried setting the content type and calling Response.End() :

protected void Page_Load(object sender, EventArgs e)
{
    //.............
    //Going about generating my XML
    //.............
    Response.Clear();
    Response.ContentType = "text/xml";        
    Response.AddHeader("Content-Disposition", "attachment; filename=template.xml");
    Response.Write(xmlDoc.InnerXml);
    Response.End();
}

Answer 4

You say you want to have a file download With asp.net web forms you would do this:

context.Response.ContentType = //MIME type

// Set the filename 
context.Response.AddHeader("content-disposition", "attachment;filename=" + queryFile); 

// Stream the file to the client 
context.Response.WriteFile(file);