VirtualBox shows only 32 bit guest versions ― and how I fixed it

I recently purchased Lenovo Yoga 500 with 64-bit Windows 10. I installed Oracle VirtualBox on it but was surprised to find that I could only install 32-bit versions of OS on it. I found this article which suggested toggling Intel (R) Virtualization Technology and Intel (R) VT-d Feature settings in BIOS. But in my laptop I couldn't find this setting. Rather you will find a setting under Configuration tab called Intel Virtual Technology and enable it.

Reboot your system and now try to install OS in VirtualBox and it should now show both 32-bit and 64-bit versions of OS.

How to sort SharePoint object of SPWeb in SPWebCollection based on Title?

A questioner posed an interesting question on SharePoint StackExchange – how to get all the web sites (SPWeb) in SharePoint and sort them alphabetically.

SPSite.AllWebs returns a collection of all web sites that are contained within the site collection. But they seem to be in random order and are not sorted alphabetically based on their Title. Sorting these web sites based on their title is actually pretty easy.

SPSite.AllWebs returns object of SPWebCollection which inherits from IEnumerable<T> interface. This interface has a function called OrderBy using which we can order the SPWeb based on its Title property.

SPWebCollection webColl = site.AllWebs;
// Sort the SPWeb alphabetically based on Title
IEnumerable sortWebColl = webColl.OrderBy(w => w.Title); 
foreach (SPWeb web in sortWebColl) {
    // Code
}

You also need to make sure that you use the following namespaces otherwise it will throw error.

using System.Linq;
using System.Collections;
using System.Collections.Generic;

You can extend the above code snippet to sort based on Description and other properties of SPWeb also.

Get appWebUrl and hostUrl in SharePoint Online / Office 365

When you are developing in SharePoint Online / Office 365 you will have to fetch appWebUrl and hostUrl if you want to perform any operation on your lists and libraries. I could find two ways of getting these values.

1. Reading values of SPAppWebUrl and SPHostUrl from query string

When you run your project it opens up the page Default.aspx. The URL of this page looks something like this.

Notice the query string parameters of SPAppWebUrl and SPHostUrl. You can fetch these values via a helper function.

Permission, Permission Level and Permission Policy in SharePoint

Permission, Permission Level and Permission Policy are three very different functionalities yet closely related in SharePoint. This article presents my understanding of what they are and how they work in SharePoint. It has been written with SharePoint 2010 in reference.

Permission

Permission means an action allowing someone to do a particular thing. In SharePoint it means the same. So you have permissions like Add Items, Edit Items, Delete Items and 30 more permissions. Yes, there are in all 33 permissions in SharePoint.

Permissions are divided into three categories.

• Site Permissions (18) – apply generally across a SharePoint site
• List Permissions (12) – apply to content in lists and libraries
• Personal Permissions (3) – apply to content that belongs to a single user

Permissions also depend on other permissions. For e.g. you must be able to open an item to view it. In this way, View Items permission depends on Open permission. Below is the complete list of all the permissions and dependent permissions.

Disable uppercase menu in Visual Studio

When I started learning SharePoint I came across Visual Studio and its hideous upper case menu.

I don't know what was the reasoning behind this, but in Visual Studio Community 2013 version you turn this off to show more conventional title case menu.

For this go to "Tools > Options". Under "Environment > General" enable the option of "Turn off upper case in menu bar".

And you will get the menu in title case.

Split string in JavaScript using regular expression

JavaScript has split() method which returns array of the substrings based on the separator character used. But you can also split a string using regular expression.

Say you have a credit card number which you want to split in array of four substrings with each substring consisting of 4 digits. For that you would use the match method of string.

var strValue = "1111222233334444";
var splitValues = strValue.match(/(\d{4})(\d{4})(\d{4})(\d{4})/);

// Start looping array from 1st index position as 0
// index position contains the entire parent string
for (var i=1 ; i<splitValues.length ; i++) {
 // Loop through the elements
}

Here, you use the match method and pass it the regular expression of (\d{4})(\d{4})(\d{4})(\d{4}) to split it into four equal substrings of four digits each. One thing to remember here is that the string returned here contains the parent string at the 0 index position and then the split substrings start at 1st position.

There is limitation here though — you need to know the number of characters in the string before hand, which might not be the case always.

Significance of BaseViewID="0" in schema.xml for SharePoint List Definition

Whenever you create a SharePoint List Definition in Visual Studio the schema.xml file contains two entries for View.

<View BaseViewID="0" Type="HTML" MobileView="TRUE" TabularView="FALSE">

<View BaseViewID="1" Type="HTML" WebPartZoneID="Main" 
      DisplayName="$Resources:core,objectiv_schema_mwsidcamlidC24;" 
      DefaultView="TRUE" MobileView="TRUE" MobileDefaultView="TRUE" 
      SetupPath="pages\viewpage.aspx" ImageUrl="/_layouts/images/generic.png" 
      Url="AllItems.aspx">

Note that one of the views has BaseViewID="0" while other one has BaseViewID="1". The view with BaseViewID set to 1 is the default view with Url set to AllItems.aspx. But the view with BaseViewID set to 0 has no Url attribute set. Any modification for BaseViewID="1" gets reflected on the default view but I couldn’t figure out where the BaseViewID="0" view was being used. Even MSDN documentation is not very clear about it. A bit puzzled about this I posted this question on SharePoint StackExchange and was pointed to this answer which explains the reason for this additional view.