SharePoint 2013 Features/Highlights:

Apps in SharePoint 2013/office 365:

I have already covered about the features and benefits of introducing apps in my earlier posts. Please have a look into it.

1. Overview of apps:
2. Host Web Vs App web
3. Get Host Web url 
4. And some list Operations on SharePoint 2013/Office 365 sites

Create SharePoint list from Visal Studio2012:

In visual Studio 2012, separate tool called “Lists” introduced to create the lists and libraries in more convenient way. Here we can create both customizable and non-customizable lists.

• Customizable lists means In addition to we can add/create existing/new fields, views etc. with it.
• Non-customizable lists means it’s just create a new list.

List Operations on Sharepoint Apps: using ECMAScript

Below content will help to guide you on below things:

1. How to get the host web url? 
2. How to check whether the list exists or not? 
3. How to create a list? 
4. How to create fields? 
5. How to add Items into the list? 
6. How to Read items from the list?

Just replace the below code with your "app.js" file on office365(Napa tool) and see the magic.  Please give the required permission levels to do CRUD operations on the hosted site like read/write permissions otherwise get access denied error.

Access denied on: Napa tool/ SharePoint 2013 apps

Recently I got the "Access Denied" issue when I try to access the lists data from the Visual Studio 2012 apps and Napa tool.

To get the access permissions from the Napa tool:
You will get the below popup up window once you clicked on "properties" tab[see below fig] and here you can give the access according to your functionality.

Check whether the list exists or not using ECMAScript

In SharePoint 2013 when you create any SharePoint Hosted App it will create separate web for the app you created. You can find it easily by verifying the URL at the browser.
1) SPHostUrl 2) SPAppWebUrl