Ribbon - Prism - OpenFile Command

Ribbon for WPF Forum

Posted 6 years ago by Stephane Franiatte
Version: 14.2.0610
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Hi,

I am currently testing the Ribbon, although this is not a question directly related to this control. I have a DelegateCommand, OpenFileCommand, which can take a String (the file path), but not necessarly (the same command is used to open the Open File Dialog, in case the String is Null). I get the following error, at runtime:

Unable to cast object of type 'ActiproSoftware.Windows.Controls.Ribbon.Input.CheckableCommandParameter' to type 'System.String'

Here is a workaround I found:

<!--Open Button-->
                <ribbon:Button Label="Open" 
                               ImageSourceSmall="/MyApp;component/Images\Open.ico"  
                               KeyTipAccessText="O" 
                               Command="{x:Static module:ModuleCommands.OpenFileCommand}"
                               CommandParameter=" "/>

 And in my function, I use IsNullOrWhiteSpace to trigger the opening of the Open File Dialog.

However, I would like to avoid doing this, I am sure there is a way to handle DelegateCommand(Of String) properly?

Thanks

[Modified 6 years ago]

Comments (4)

Posted 6 years ago by Actipro Software Support - Cleveland, OH, USA
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Hi Stephane,

The ribbon:Button control has a CheckableCommandParameter instance in CommandParameter by default.  By specifying a value as you do there, you force it to a string instead.  You might also be able to set it to "{x:Null}" instead of " ".  That's the only other suggestion I'd have.


Actipro Software Support

Posted 6 years ago by Stephane Franiatte
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Hi,

yeah, that's what I thought. That is not a really big deal anyway; I am more concerned about my other problem (see my other post).

Thanks!

The latest build of this product (v2019.1 build 0685) was released 4 months ago, which was before the next post in this thread.
Posted 2 months ago by eric
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Well we are facing a similar issue here after we've upgraded to 2019.

In our case we need to move the parameter so that it is defined before the Command like so:

<ribbon:Button
Label="Blabla"
CommandParameter="{Binding MyParam}"
Command="{Binding MyCommand}"/>
 
instead of
<ribbon:Button
Label="Blabla"
Command="{Binding MyCommand}"
CommandParameter="{Binding MyParam}"
/>
 
to us this is a bug in actipro and we now need to fix this in over 20-30applications.
 
A fix would be appreciated.
 
Posted 2 months ago by Actipro Software Support - Cleveland, OH, USA
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Hi Eric,

Since this is an old thread, can you please write us at our support email address?  In the e-mail, please describe the exact problem in detail, and which version/build you were using before, and which version/build you are using now.  Then we can discuss what might have changed and continue the discussion further.  Thanks!


Actipro Software Support

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