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POHow do I output a string instead of a HTML page?
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  1. POHow do I output a string instead of a HTML page?
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    copied!<p>I want to be able to output a simple string as text rather than the HTML page when a set of criteria are met. I am currently using:</p> <pre><code>Protected Sub OutputString(ByVal Str As String) Dim bytes() As Byte bytes = System.Text.Encoding.UTF8.GetBytes(Str) Response.ContentType = "text/plain" Response.OutputStream.Write(bytes, 0, bytes.Length) Response.End() End Sub </code></pre> <p>This works great and does exactly what I want, however, the Response.End() generates exceptions and (I believe) should be avoided where possible.</p> <p>I suppose I could use a separate "empty" page for this code but its more of a work around than a solution. Also, someone said something about over riding the HTML output behaviour (can't remember where now).</p> <p>I would be very grateful if someone could tell me the best method.</p> <p><strong>UPDATE:</strong> I found this link : <a href="http://web.archive.org/web/20101224113858/http://www.c6software.com/codesolutions/dotnet/threadabortexception.aspx" rel="nofollow">Response.Redirect(url) ThreadAbortException Solution</a></p> <p>It recommends using HttpContext.Current.ApplicationInstance.CompleteRequest() and over riding the functions that render the page:</p> <pre><code>Dim DoNotOutputHTML As Boolean = False Protected Overrides Sub RaisePostBackEvent(sourceControl As IPostBackEventHandler, eventArgument As String) If DoNotOutputHTML = False Then MyBase.RaisePostBackEvent(sourceControl, eventArgument) End If End Sub Protected Overrides Sub Render(writer As HtmlTextWriter) If DoNotOutputHTML = False Then MyBase.Render(writer) End If End Sub </code></pre> <p>You can then choose whether or not to output your html page by setting the variable DoNotOutputHTML.</p> <p>The only problem I have with this is that any code after the CompleteRequest() still executes. I can work around this by restructuring my code although it would be neater (less if/else blocks) if I didn't have to, like I don't with response.end()</p> <p>Any suggestions?</p>
 

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