WCF and ASP.NET - Server.Execute throwing object reference not set to an instance of an object
- by user208662
Hello,
I have an ASP.NET page that calls to a WCF service. This WCF service uses a BackgroundWorker to asynchronously create an ASP.NET page on my server. Oddly, when I execute the
WCF Service
[OperationContract]
[WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedRequest, RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
public void PostRequest(string comments)
{
// Do stuff
// If everything went o.k. asynchronously render a page on the server. I do not want to
// block the caller while this is occurring.
BackgroundWorker myWorker = new BackgroundWorker();
myWorker.DoWork += new DoWorkEventHandler(myWorker_DoWork);
myWorker.RunWorkerAsync(HttpContext.Current);
}
private void myWorker_DoWork(object sender, DoWorkEventArgs e)
{
// Set the current context so we can render the page via Server.Execute
HttpContext context = (HttpContext)(e.Argument);
HttpContext.Current = context;
// Retrieve the url to the page
string applicationPath = context.Request.ApplicationPath;
string sourceUrl = applicationPath + "/log.aspx";
string targetDirectory = currentContext.Server.MapPath("/logs/");
// Execute the other page and load its contents
using (StringWriter stringWriter = new StringWriter())
{
// Write the contents out to the target url
// NOTE: THIS IS WHERE MY ERROR OCCURS
currentContext.Server.Execute(sourceUrl, stringWriter);
// Prepare to write out the result of the log
targetPath = targetDirectory + "/" + DateTime.Now.ToShortDateString() + ".aspx";
using (StreamWriter streamWriter = new StreamWriter(targetPath, false))
{
// Write out the content to the file
sb.Append(stringWriter.ToString());
streamWriter.Write(sb.ToString());
}
}
}
Oddly, when the currentContext.Server.Execute method is executed, it throws an "object reference not set to an instance of an object" error. The reason this is so strange is because I can look at the currentContext properties in the watch window. In addition, Server is not null. Because of this, I have no idea where this error is coming from.
Can someone point me in the correct direction of what the cause of this could be?
Thank you!
