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Author: Michael Washington Created: 8/20/2010 8:49 PM RssIcon
All about Microsoft LightSwitch
By Michael Washington on 7/24/2011 8:14 AM
ComponentsOne’s OLAP For LightSwitch, is a “pivoting data analyzer” control that plugs into LightSwitch. It has been called the ‘Killer App’ for LightSwitch.

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You can download the demo at this link:

http://www.componentone.com/SuperProducts/OLAPLightSwitch/

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By Michael Washington on 7/22/2011 5:55 AM
So you have deployed your LightSwitch application and everything is running fine. Then you get an email that a user is unable to perform a function. The problem you now have is that this is a problem that you can only see in production. When you need to preform debugging of a LightSwitch application in production, you want to use Tracing.

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Getting the Most Out of the Save Pipeline in Visual Studio LightSwitch by Dan Seefeldt (http://www.code-magazine.com/articleprint.aspx?quickid=1103071), is...
By Michael Washington on 7/13/2011 8:51 PM
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It is easy to create a LightSwitch application using your own custom user interface (UI), composed entirely of Silverlight Custom Controls. The article This Is How LightSwitch Does MVVM, covers the basics of how you bind Silverlight Custom Controls to LightSwitch Properties and Collections. The article at this link,...
By Michael Washington on 6/25/2011 9:28 AM
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This article describes how you can upload files using LightSwitch, and store them on the server hard drive. This is different from uploading files and storing them in the server database.

If you want to upload files and store them in the database, see How Do I: Import and Store a Data File by Matt Sampson.

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By Michael Washington on 6/24/2011 6:08 AM

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WCF RIA Services are the “fix any data issue” solution. If the problem is getting data to your LightSwitch application, and the normal create or add table will not work, the answer is to use a WCF RIA Service.

By Michael Washington on 6/9/2011 7:30 PM

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There is no built-in reporting for LightSwitch. DevExpress provides a Free LightSwitch reporting control...

By Michael Washington on 6/4/2011 6:25 AM
One of the greatest benefits to using LightSwitch, is that it automatically manages data integrity when multiple users are updating data. It also provides a method to resolve any errors that it detects.

The first issue is very important, and with most web applications, it is not handled. Simply, the last person to save a record overwrites any other changes, even if those other changes were made after the user initially pulled up the record. The second issue, a method to resolve this situation, is priceless, because the code to create the “conflict resolution process” is considerable.

This blog post does not contain any code examples, because there is no code for you to write to get all these features!

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By Michael Washington on 5/23/2011 5:37 AM
NOTE: If you are using LightSwitch 2013 Update 2 (or higher) you must add compatibilityMode="Framework20SP1" to the "machineKey" in the LightSwitch Web.config (for example: http://blogs.msdn.com/b/webdev/archive/2012/10/23/cryptographic-improvements-in-asp-net-4-5-pt-2.aspx

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Note: You can try out this application...
By Michael Washington on 5/22/2011 8:53 AM
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From: Microsoft Visual Studio LightSwitch Extensions Cookbook.doc © 2011 Microsoft Corporation NOTE: See the updated article: Creating a Minimal LightSwitch Shell A LightSwitch application runs in a “Shell”. You can create your own Shell.

The first step is to download the “Cook Book”...
By Michael Washington on 5/21/2011 6:19 AM
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Note: There is a third method covered at this link.

It is easy to create a LightSwitch application using your own custom user interface (UI), composed entirely of Silverlight Custom Controls. The article This Is How LightSwitch Does MVVM,...
By Michael Washington on 5/19/2011 5:34 AM
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The Document Toolkit for LightSwitch is a commercial LightSwitch control extension. It is one of the first to become available, and is a great example of an extension that allows you to do amazing things easily with LightSwitch.

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By Michael Washington on 5/13/2011 9:46 PM


This article, Silverlight View Model Style: An (Overly) Simplified Explanation, explains what MVVM is. Basically:

Model – The Data View Model – Collections, Properties, and Commands View – The UI (User Interface) This article, covers some of the problems in implementing MVVM, mostly that is is verbose,  time-consuming, and difficult for many developers to understand and implement. That is not to say that MVVM is not a superior pattern once you have mastered it, but using a tool such as LightSwitch greatly eases it’s use.

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By Michael Washington on 5/12/2011 5:25 AM

With LightSwitch, there is no built in Printing. Here is a method that works. This will also show you how to create a custom template to allow you to print exactly what you want, not just the current screen...
By Michael Washington on 5/12/2011 4:19 AM
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Printing in LightSwitch was previously covered here:

http://lightswitch.adefwebserver.com/Blog/tabid/61/EntryId/3/Printing-With-LightSwitch.aspx

The disadvantages of that approach are:

You have to make a custom control / You have to be a programmer to make reports Printing in Silverlight renders images that are slightly fuzzy In this article, we will demonstrate creating and printing reports in LightSwitch using Microsoft Report Viewer Control.

Note, you will need Visual Studio Professional, or higher, to use the method described here.

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By Michael Washington on 5/8/2011 7:01 AM
The LightSwitch filter extension is really cool. It is one of the LightSwitch features that has no comparison. It is a feature that, if you decide not to use LightSwitch for a project, you lose that feature completely.

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First, we download and install the extension at this link:

http://code.msdn.microsoft.com/Filter-Control-for-Visual-90fb8e93

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By Michael Washington on 5/6/2011 5:19 AM
I was surprised when I was chosen to present at Visual Studio Live in Las Vegas early this year. I had sent in 3 proposed topics months before, and the one chosen was Advanced LightSwitch Programming. After being informed of my selection to speak at the conference, I sat down to create the presentation and ran into a huge problem. There is just too much to cover about advanced LightSwitch programming to cram into 75 minutes.

I really agonized over this, and re-wrote the presentation several times. In the end, I spent over 40 hours preparing and practicing the presentation. The only structure I was happy with, was coving LightSwitch programming using three concepts that I felt were important to successful LightSwitch programming.

These are presented in order of importance.

Concept #1 - LightSwitch requires you to only write the code that only you can write Examples of the concept:

A calculated field that shows the course and the teacher...
By Michael Washington on 4/28/2011 6:51 PM
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In many LightSwitch applications, you will desire the ability to display aggregated data and percentages. While the article at this link explains a method that will work 100% of the time, with the best performance, it requires the creation of an additional project. The method described here, is easier to use, yet, it has limitations (for example it will not allow you to use GroupBy)....
By Michael Washington on 4/23/2011 1:57 PM
NOTE: Please see Easy DotNetNuke LightSwitch Deployment, for an easier method to use LightSwitch in a DotNetNuke website

DotNetNuke has long been known as one of the easiest and most powerful web content management frameworks.

Combined with LightSwitch, the easiest way to create data driven applications, you have the ability to create and deploy “Line-Of-Business” applications quickly and easily.

An important thing to note, is that you can use your existing DotNetNuke users and roles with your LightSwitch applications.

This is really important if your already have accounts and roles.

You don’t want to require your users to learn a new username and password, and need to log into, each application.

Deploying your LightSwitch applications in DotNetNuke allows a seamless user experience.

What You Need:

DotNetNuke 5 (using ASP.NET 4.0) LightSwitch Beta 2...
By Michael Washington on 4/11/2011 5:49 AM
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LightSwitch is designed for “forms over data”, entering data into tables, and retrieving that data. Procedural code is required when you need to manipulate data in “batches”. Normally, you want to put all your custom code on the Entity (table) level, but for procedural code, you want to use custom code on the Screen level.

The Inventory Program To demonstrate procedural code in LightSwitch, we will consider a simple inventory management requirement. We want to specify sites and books, and we want to move those books, in batches, between the sites.

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Microsoft Visual Studio is a registered trademark of Microsoft Corporation / LightSwitch is a registered trademark of Microsoft Corporation