SyntaxEditor .NET Languages Add-on - Async/Await and Iterators

by Avatar Bill Henning (Actipro) - 1 comment
Wednesday, August 29, 2012 at 12:05pm

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The latest official C# 5.0 and Visual Basic 11.0 language specifications have added some new keywords and functionality to the languages.  Both languages add asynchronous procedure support (via async/await) and VB adds iterators.

Our upcoming 2012.2 versions of the SyntaxEditor .NET Languages Add-on (WPF and Silverlight versions) have been updated to fully parse the syntax changes and support automated IntelliPrompt on await expression results.

UPDATE:  Version 2012.2 is live and available for download now.

Automated IntelliPrompt for Await

Let's take a look at a sample of async/await in action.  In this sample code snippet, we have a method that will print the row count of a table that is asynchronously returned.

Async

Note how all variables are implicitly declared with the var keyword.  First we declare a dataTask variable that is a Task<DataTable>.  Then we declare a table variable that is the result of an await of the task.

A lot of complicated code is going on behind the scenes here.  First, in order to determine task's type, the resolver has to search the awaited object (dataTask) for a GetAwaiter method (either explicitly declared or declared via an extension method).  If found, it examines that object for a GetResult method and the return value of that is task's type.

Finally you can see from the screenshot that it properly determined that table is of type DataTable since we are able to access the Rows collection on it.

Summary

Our .NET Languages Add-on continues to support the latest syntax innovations and has very impressive automated IntelliPrompt capabilities that can be added to your own applications.  The enhancements mentioned above will be included in the upcoming 2012.2 version.

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WPF Controls 2012.1 Build 562 Released

by Avatar Bill Henning (Actipro)
Friday, July 20, 2012 at 12:41pm

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WPF Studio 2012.1 build 562 has been released and is now available for download. Several very nice new controls and enhancements are part of this build.

This build has the following major new features:

  • Micro Charts: Added new MicroHeatMapPresenter control that facilitates the creation of heat maps where each cell renders color and/or size differences to reflect data values.
  • SyntaxEditor: Added a new NavigableSymbolSelector control, which can be used to provide type/member drop-down support for a language.
  • SyntaxEditor: Added a INavigableSymbolProvider language service, related types and samples.
  • SyntaxEditor .NET Languages Add-on: Implemented an INavigableSymbolProvider service on both the C# and VB languages, allowing for NavigableSymbolSelector support.
  • All: Improved designer support compatibility with VS 2012.

See the announcement post for the detailed list of enhancements and updates.

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WinForms Controls 2012.1 Build 302 Released

by Avatar Bill Henning (Actipro)
Friday, July 20, 2012 at 11:47am

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WinForms Studio 2012.1 build 302 has been released and is now available for download. Several enhancements and bug fixes are part of this build, along with improved VS 2012 support.

See the announcement post for the detailed list of enhancements and updates.

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Silverlight Controls 2012.1 Build 132 Released

by Avatar Bill Henning (Actipro)
Friday, July 20, 2012 at 8:37am

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Silverlight Studio 2012.1 build 132 has been released and is now available for download.  Several very nice new controls and enhancements are part of this build.

This build has the following major new features:

  • Micro Charts: Added new MicroHeatMapPresenter control that facilitates the creation of heat maps where each cell renders color and/or size differences to reflect data values.
  • SyntaxEditor: Added a new NavigableSymbolSelector control, which can be used to provide type/member drop-down support for a language.
  • SyntaxEditor: Added a INavigableSymbolProvider language service, related types and samples.
  • SyntaxEditor .NET Languages Add-on: Implemented an INavigableSymbolProvider service on both the C# and VB languages, allowing for NavigableSymbolSelector support.
  • All: Improved designer support compatibility with VS 2012.

See the announcement post for the detailed list of enhancements and updates.

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SyntaxEditor Navigable Symbol Selector Part 2

by Avatar Bill Henning (Actipro)
Wednesday, July 11, 2012 at 8:51am

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In our previous post, we talked about the new NavigableSymbolSelector control being added to the next 2012.1 builds of SyntaxEditor for WPF and Silverlight.

To sum up, the control implements drop-down lists that can be wired up to a SyntaxEditor and will list available symbols within the document.  As the caret moves, the drop-down selection is updated.  The end user can select a symbol from a drop-down and the editor caret will navigate to that symbol.  All of this functionality is very similar to the type/member drop-downs found in Visual Studio. 

Best of all, this functionality can easily be implemented for any custom language.  The last post showed an example of using the control for a custom language.  In this post, we'll take a look at the built-in implementation for the C# and VB languages found in the .NET Languages Add-on.

Screenshots

Here's how the NavigableSymbolSelector control looks when bound to a SyntaxEditor that has the .NET Languages Add-on's C# language loaded:

NavigableSymbolSelector1

There are two drop-downs present.  The one on the left shows the types and the one on the right shows the members within the currently-selected type. 

NavigableSymbolSelector2

As we move the caret around, the drop-downs update their selections.  In this screenshot we can see the members that are defined in the ConsoleWriter class, which is being edited in the SyntaxEditor.  Note how the members render their representations using C# syntax.

Next, let's look at the Visual Basic language's implementation:

NavigableSymbolSelector3

Here you can see the drop-down selections are tracking the caret's location and are rendering their content in VB syntax. 

This screenshot also shows a special feature only found in the WPF implementation.  If the caret is outside of a symbol, the text will appear grayed out.  Note how the caret is inside the Program class declaration but is outside of the Main method declaration.  Thus the Main symbol is grayed out.  This helps the end user visualize better whether they are actually within, or just near, a symbol.

Summary

These new features will be in the next 2012.1 builds of our WPF and Silverlight controls.

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