Powershell - Display Event Receivers for a specific Sharepoint List

$web=Get-SPWeb "http://siteURL"

$list=$web.Lists["ListName"]

$list.EventReceivers

$web.Dispose()

Display Names of the Event receivers 

$web=Get-SPWeb "http://SIteURL"

$list=$web.Lists["ListName"]

$list.EventReceivers |ForEach-Object {Write-host $_.Type  $_.Name}

$web.Dispose()

Powershell - Create Posts list to Blog site in Sharepoint

[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")

$site=new-Object Microsoft.SharePoint.SPSite("http://siteurl/sites/test/")

$web=$site.OpenWeb()

$SPTemplate = $web.ListTemplates["Posts"]

$web.Lists.Add("Posts","Description",$SPTemplate)

Powershell - Delete list from Sharepoint site

[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")

$site=new-Object Microsoft.SharePoint.SPSite("http://siteurl/sites/test/")

$web=$site.OpenWeb()

$list=$web.Lists["ListName"]

$list.Delete()

Get SPUser from sharepoint SPGroup

List<SPUser> usersLst = web.Groups[“GroupName”].Users.OfType<SPUser>().ToList<SPUser>();

How to fetch user from multi-valued column in ItemEventReceiver

if you have muli-valued column of type Person or Group, the afterpropeties will give results in the format

"9;#Admin;#11;#Reader;#13;#Contribute";

To get the username or group names from the above string format, use the below code.

  char[] separators = new char[] { ';', '#' };

  object objgroupNamesNew = properties.AfterProperties["UserGroup"];

  string gNew = Convert.ToString(objgroupNamesNew);

  string[] gpnameNew = gNew.Split(separators, StringSplitOptions.RemoveEmptyEntries);

  var groupNamesNew = gpnameNew.Where((gp, index) => index % 2 != 0);

  foreach (var grp in groupNamesNew)

            {

                Console.WriteLine(grp);

            }

Sharepoint 2013 Remote Event Receiver Sample

Please visit the below link for step by step process

http://blogs.technet.com/b/sharepointdevelopersupport/archive/2013/03/13/how-to-create-a-remote-event-receiver-for-a-sharepoint-hosted-app.aspx