C# and WebBrowser component question

[Fawzib Rojas]

I have an app with a WebBrowser component and I'm setting the the
ObjectForScripting component so the object can be used from javascript.

The object has a Scripting.Dictionary property. My problem is that in
javascript I have to use "external.dictionary.Item('x')" to get the
items instead of "external.dictionary('x')". If I create the
Scripting.Dictionary in javascript it works ok. For example:

javascript:

var dict=new ActiveXObject( 'Scripting.Dictionary' );

dict.Add("item1","test");
external.dictionary.Add("item1","test");
alert(dict("item1"));
alert(external.dictionary("item1")); // this fails

alert(external.dictionary.Item("item")); / this works

What can I do so the dictionaries created by C# work the same as the
Javascript created ones?

[Nicholas Paldino [.NET/C# MVP]]

Fawzib,

Can you show the C# code which sets the ObjectForScripting? My guess is
that you are using a Dictionary<TKey, TValuewhich then uses the
IDictionary interface (the only one marked as ComVisible).

If you want to use a .NET Dictionary<TKey, TValueand still expose it
like a Scripting.Dictionary in the browser, then you either have to use a
Scripting.Dictionary in your app, and pass that, or, you can create a
wrapper class which implements the Scripting.Dictionary interface (it is a
COM object, so it has an interface) and then takes your .NET dictionary
instance and forwards the calls.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Fawzib Rojas" <f_*****@nospam.spectron.msim.comwrote in message
news:ue*************@TK2MSFTNGP02.phx.gbl...

>I have an app with a WebBrowser component and I'm setting the the
ObjectForScripting component so the object can be used from javascript.

The object has a Scripting.Dictionary property. My problem is that in
javascript I have to use "external.dictionary.Item('x')" to get the items
instead of "external.dictionary('x')". If I create the
Scripting.Dictionary in javascript it works ok. For example:

javascript:

var dict=new ActiveXObject( 'Scripting.Dictionary' );

dict.Add("item1","test");
external.dictionary.Add("item1","test");
alert(dict("item1"));
alert(external.dictionary("item1")); // this fails

alert(external.dictionary.Item("item")); / this works

What can I do so the dictionaries created by C# work the same as the
Javascript created ones?

[Fawzib Rojas]

Nicholas Paldino [.NET/C# MVP] wrote:

Fawzib,

Can you show the C# code which sets the ObjectForScripting? My guess is
that you are using a Dictionary<TKey, TValuewhich then uses the
IDictionary interface (the only one marked as ComVisible).

If you want to use a .NET Dictionary<TKey, TValueand still expose it
like a Scripting.Dictionary in the browser, then you either have to use a
Scripting.Dictionary in your app, and pass that, or, you can create a
wrapper class which implements the Scripting.Dictionary interface (it is a
COM object, so it has an interface) and then takes your .NET dictionary
instance and forwards the calls.

I don't see why I cant access the dictionary created in C# the same way
as a Javascript created one. Here is the class (removed most of the
irrelevant info):

public class MyExternal {
//
object m_globals = null;
//
public MyExternal(object gl) {
m_globals = gl;
}
public object globals {
get{
return(m_globals);
}
}
}

public partial class MainForm : Form {
// originally it was:
// Scripting.Dictionary globals=new Scripting.Dictionary();
// changed it because it didn't work either
MyExternal m_external;
//
object globals = Activator.CreateInstance(
Type.GetTypeFromProgID("Scripting.Dictionary")
);
//
public MainForm() {
InitializeComponent();
m_external=new MyExternal(globals);
AddValue(globals, "test", "test information");
MainBrowser.ObjectForScripting = m_external;
}
public void AddValue(object d, object k, object v) {
((Scripting.Dictionary)d).Add(ref k,ref v);
}
}

[Nicholas Paldino [.NET/C# MVP]]

Fawzib,

You need to use the DictionaryClass which is imported through TLBIMP.
The DictionaryClass implements the dispatch interface (which is necessary
for accessing the default property through script) whereas Dictionary and
IDictionary do not.

Change the type you expose to DictionaryClass and it should work.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Fawzib Rojas" <f_*****@nospam.spectron.msim.comwrote in message
news:u7**************@TK2MSFTNGP06.phx.gbl...

Nicholas Paldino [.NET/C# MVP] wrote:

>Fawzib,

Can you show the C# code which sets the ObjectForScripting? My guess
is that you are using a Dictionary<TKey, TValuewhich then uses the
IDictionary interface (the only one marked as ComVisible).

If you want to use a .NET Dictionary<TKey, TValueand still expose
it like a Scripting.Dictionary in the browser, then you either have to
use a Scripting.Dictionary in your app, and pass that, or, you can create
a wrapper class which implements the Scripting.Dictionary interface (it
is a COM object, so it has an interface) and then takes your .NET
dictionary instance and forwards the calls.

I don't see why I cant access the dictionary created in C# the same way as
a Javascript created one. Here is the class (removed most of the
irrelevant info):

public class MyExternal {
//
object m_globals = null;
//
public MyExternal(object gl) {
m_globals = gl;
}
public object globals {
get{
return(m_globals);
}
}
}

public partial class MainForm : Form {
// originally it was:
// Scripting.Dictionary globals=new Scripting.Dictionary();
// changed it because it didn't work either
MyExternal m_external;
//
object globals = Activator.CreateInstance(
Type.GetTypeFromProgID("Scripting.Dictionary")
);
//
public MainForm() {
InitializeComponent();
m_external=new MyExternal(globals);
AddValue(globals, "test", "test information");
MainBrowser.ObjectForScripting = m_external;
}
public void AddValue(object d, object k, object v) {
((Scripting.Dictionary)d).Add(ref k,ref v);
}
}

[Fawzib Rojas]

Well, anyone has any other ideas?