In a recent post in the LightSwitch Forum, Justin Anderson (a member of the LightSwitch Team) briefly but succintly explained the difference between the IScreenObject and IActiveScreen interfaces.

Not only did he explain the difference between the two, he also used a neat little LINQ trick, involving the Select method, that I don't think I've seen before. Or at least if I have, I don't remember seeing it.

While this tip may not be directly LightSwitch-related, as a LightSwitch developer, you may still find this tip handy.

I was just trying to help someone create a database using the script that the LightSwitch Publish Wizard creates when you select the script option (in other words when you're not on the same network as the end-user). We were getting an error running the script in SSMS (SQL Server Management Studio).

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Have you ever wanted to be able to change the image that gets displayed for the built-in Save, or Refresh command in the screen ribbon, but you didn't want to have to install a shell extension, or a theme extension?

Maybe you have just ONE screen that needs a different image. Or maybe you'd like to change the image for ALL screens. Well, after Pavan Kumar asked the question in this post, I did some digging & found that it is indeed possible to do this. I had two goes at it before I found the solution, after wrongly suggesting that it may only be possible in a theme extension.

You'll need to manually edit the project's lsml file, so the usual caveat about making sure you back it up before you touch it applies.

For any screen that you want to change the image for, you'll need to find the following line (in this case, we'll be changing the Save image, but you can do the same thing...

Luminous LightSwitch Types updated today.

This extension now consists of four custom LightSwitch business types:

• a Password type - that hides the characters being typed, as well as validating several optional conditions

• a Link type - that allows you to enter/edit a URL, as well as launch a browser with it

• a Percent type - that stores the value as a decimal, but displays it as a percentage

• an ISBN type - that validates both ISBN-10 & ISBN-13 numbers

Luminous LightSwitch Commands released today.

This extension consists of four custom LightSwitch commands:

• Close Screen (Save Changes)

• Close Screen (cancel changes)

• Log Off Current User

• Exit Application

I've just uploaded a code sample to MSDN Developer Samples, showing How to Switch Between LightSwitch's Logical & File Mode With Macros

Do you ever get tired of the tedious method that you have to use to switch between LightSwitch's Logical View & File View? This code sample will show you how to add two macros to make it much easier.

Luminous LightSwitch Types released today.

This extension consists of two custom LightSwitch business types:

• a Percent type

• an ISBN type