[program-l] Re: Telling a C# implementation of SayTools to in fact UseSAPI
- From: Jamal Mazrui <empower@xxxxxxxxx>
- To: program-l@xxxxxxxxxxxxx
- Date: Wed, 4 Mar 2009 10:46:04 -0500 (EST)
Thanks for reporting back what constant did the trick.
Regarding the activation letter for a control, I think this depends on the
object model rather than the language used. With C# and the WinForms
classes, an ampersand character (&) is used. I do not know about WPF.
The ampersand has a special meaning in XML (so it has to be escaped for a
literal one), so perhaps it is an underscore character (_) instead, which
I think would be true regardless of language (the .NET Framework tries to
be language acgnostic).
Jamal
On Wed, 4 Mar 2009,
Jacob Kruger wrote:
> Date: Wed, 4 Mar 2009 15:39:10 +0200
> From: Jacob Kruger <jacobk@xxxxxxxxxxxx>
> Reply-To: program-l@xxxxxxxxxxxxx
> To: program-l@xxxxxxxxxxxxx
> Subject: [program-l] Re: Telling a C# implementation of SayTools to in
> fact UseSAPI
>
> Ok.
>
> I was just being hasty/silly.
>
> Here's the working code:
> public void SaySomething(string stIn )
> {
> Type t = Type.GetTypeFromProgID("Say.Tools");
> object oST = Activator.CreateInstance(t);
> object[] aParams1 = { 1};
> t.InvokeMember("UseSAPIAsBackup", BindingFlags.PutDispProperty, null, oST,
> aParams1);
>
> object[] aParams = { stIn};
> t.InvokeMember("Say", BindingFlags.InvokeMethod, null, oST, aParams);
> }
>
> The change that made it work is:
> BindingFlags.PutDispProperty
>
> One other question is that when doing normal windows development in C#, it
> seems to like something like _One to, for example set that buttons hotkey to
> be the letter O, but here in WPF, it doesn't always seem to want to work.
>
> I know that in VB.Net it would be something like &One, and was just
> wondering if the _ character is in fact the right one to use in C# etc.?
>
> Stay well
>
> Jacob Kruger
> Blind Biker
> Skype: BlindZA
> '...fate had broken his body, but not his spirit...'
>
> ----- Original Message -----
> From: "Jamal Mazrui" <empower@xxxxxxxxx>
> To: "Program-l" <program-l@xxxxxxxxxxxxx>
> Sent: 03 March, 2009 11:17 PM
> Subject: [program-l] Re: Telling a C# implementation of SayTools to in fact
> UseSAPI
>
>
> > Late-bound COM automation can be tedious to code in C#! In case it's
> > helpful, the EdSharp source code (within EdSharp.cs) includes a Com class
> > that makes things a bit easier. In your example, try using the
> > BindingFlags.SetProperty constant instead.
> >
> > By the way, you seem to have done more WPF programming with a screen
> > reader than anyone I know. Would you consider writing a "fruit
> > basket" program that illustrates this framework?
> >
> > As you may know, folks on the list ProgrammingBlind@xxxxxxxxxxxxx
> > developed a set of criteria for a sample GUI program, and have
> > encouraged its implementation in various languages. This allows
> > someone considering a language to get a sense of what coding in it is
> > like and what the resulting accessibility might be of a program. The
> > web site with criteria and implementations is
> >
> > http://FruitBasketDemo.AlacornComputer.com
> >
> > Cheers,
> > Jamal
> >
> > On Tue, 3 Mar 2009,
> > Jacob Kruger wrote:
> >
> >> Date: Tue, 3 Mar 2009 15:36:11 +0200
> >> From: Jacob Kruger <jacobk@xxxxxxxxxxxx>
> >> Reply-To: program-l@xxxxxxxxxxxxx
> >> To: Program-l <program-l@xxxxxxxxxxxxx>
> >> Subject: [program-l] Telling a C# implementation of SayTools to in fact
> >> UseSAPI
> >>
> >> Hi there
> >>
> >> While now again looking into WPF etc., I have put together a small class
> >> to
> >> render a better description caption for various objects etc. from within
> >> the
> >> WPF applications, and it makes use of what they call event bubbling so
> >> that
> >> I just added an event handler for GotFocus to the window class, and in
> >> that
> >> event code I send e.OriginalSource to the other class that I then
> >> included
> >> in the application, and this gets specifically sent to a method called
> >> SayObject, wherein I'm in fact doing a switch based on the
> >> Object.GetType.ToString() function to see what type of object it is, and
> >> then getting Jaws etc. to say extra info relating to it's content etc.
> >> etc.
> >>
> >> The primary idea is that while I wouldn't want to get it to necessarily
> >> speak extra unless the user was actually running a screenreader, I was
> >> just
> >> wondering about in fact telling it to use SAPI as a backup in any case.
> >>
> >> Basically, the small bit of code from within Jamal's example code for
> >> making
> >> it say something looks like the following:
> >> Type t = Type.GetTypeFromProgID("Say.Tools");
> >> object oST = Activator.CreateInstance(t);
> >> string sText = "Hello world";
> >> object[] aParams = {sText};
> >> t.InvokeMember("Say", BindingFlags.InvokeMethod, null, oST, aParams);
> >>
> >> I tried adding in the following 2 lines of code above the actual
> >> invokeMember above to tell it to in fact use SAPI as a backup, but it
> >> just
> >> generates errors relating to invalid execution or something (not at that
> >> machine right now):
> >> object[] aParams1 = {1};
> >> t.InvokeMember("UseSAPIAsBackup", BindingFlags.InvokeMethod, null, oST,
> >> aParams1);
> >>
> >> Maybe I'm just not used enough to C# syntax, or something, but I have
> >> checked the cases of the methods/functions/variable names as much as I
> >> can,
> >> so not sure why it doesn't want to do this.
> >>
> >> Since I'm also sort of busy migrating to C# from VB.Net, it would also be
> >> best for me to figure this one out now already though.
> >>
> >> TIA
> >>
> >> Jacob Kruger
> >> Blind Biker
> >> Skype: BlindZA
> >> '...fate had broken his body, but not his spirit...'
> >>
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