Hello,
I have a singleton remote object hosted under IIS. I have a winform
client which invokes method on the remote object . This triggers an
event on the remote object and invokes the call back function on various
client subscribed to it. But when the windows control library hosted under
IE is a
client, an exception is thrown displaying object reference not set.
On debugging, i realized that the event object is null in the Remote
Object.
Is my approach correct of excepting a callback on a Winform control
hosted under IE from a Remote Object hosted in IIS ...........
I feel though the Server Object is singleton , the state is not being retained between
client invocations. i,e between the Winform client
and the WIndows Control hosted in IE.
The Stack trace is as shown below
************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at HelloWorldObject.Hello.HelloWorld(String str)
at WindowsControl.UserControl1.UserControl1_Load(Object sender, EventArgs e) in
c:\documents and settings\giriktv\my documents\visual studio
projects\remoting\windowscontrol\usercontrol.cs:line 138
at System.Windows.Forms.UserControl.OnLoad(EventArgs e)
at System.Windows.Forms.UserControl.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
The web.config is shown below
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.runtime.remoting>
<application>
<service>
<wellknown mode="Singleton"
type="HelloWorldObject.Hello,HelloWorldObject" objectUri="Hello.soap" />
</service>
<channels>
<channel ref="http" />
</channels>
</application>
</system.runtime.remoting>
</configuration>
Regards
Giri
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