Gets a page based on the given URL in SharePoint

The following function is used for getting a sharepoint page listitem based on the given URL. It returns an SPListItem for the page if found. If it returns null is the page is not found or the user doesn't have permissions to see it.

public SPListItem GetListItem(string pageUrl, SPContext context)

{
                SPListItem page;
  try
  {
          using (SPWeb web = context.Site.OpenWeb(pageUrl, false))
          {
    page = web.GetObject(pageUrl) as SPListItem;
   }
   }
   catch (FileNotFoundException)
   {
    page = null;
   }
   catch (ArgumentException)
   {
    page = null;
   }

   return page;
  }

                catch(Exception ex)

                {}

}

In the above function the parameters are,
pageUrl - Page url to search and get the SPLisItem
context - The SPContext to use to retrieve the list item.

Hope it helps.  

Sign in as Different User and SharePoint 2013

You can add the menu item back in, but I would suggest only doing this on test or development SharePoint servers. To do this, repeat this edit on all servers in your SharePoint farm:

• Locate the file \15\TEMPLATE\CONTROLTEMPLATES\Welcome.ascx and open in a text editor.
• Add the following element before the existing element with the id of “ID_RequestAccess”:

1 2 3 4 5 6 7

Text="<%$Resources:wss,personalactions_loginasdifferentuser%>"  Description="<%$Resources:wss,personalactions_loginasdifferentuserdescription%>"  MenuGroupId="100"  Sequence="100"  UseShortId="true"  />

• Save the file.

Now, the menu item shall be displayed:

How to Fix Login Failed For User NT AUTHORITY IUSRS in SharePoint 2013 Business Connectiity Services

If you have created an external content type and are trying to access it in a list and get "AccessDenied" then that is because you have not given permissions to the logged in user to use that external content type. You can easily give permissions to that user or to all users in your site by going to the Central Administration site and configuring the business connectivity service. For the exact procedure of how to do it read the following.

SharePoint 2013 Business Connectivity Service Access DeniedError: http://mosshosting.asphostportal.com/?p=2650

Some users get another very interesting error message after they have assigned permissions on the external content type. The error message is:

Message from ExternalSystem: "Login failed for user 'NT AUTHORITY\IUSR'.".

This error occurs because the database does recognize the credentials passed from SharePoint. Which database? The database that you are connecting to in your external content type! It depends on whether you have setup an application pool identity in SharePoint. If you are not using a managed service account for your services then you are most likely to get this error. This is not likely to occur in corporate environments but in home or test environments where users use "LOCAL SYSTEM" or "NETWORK SERVICE" in application pools, this error will occur. This is because" NETWORKSERVICE" translates to "NTAUTHORITY\IUSR" when credentials are passed from a web server to the database server. "IUSR" is used when user credentials are not available, for example, for anonymous users. To resolve this problem, either change the application pool identity or add "NT AUTHORITY\IUSR" to the database permissions. The first scenario is quite common. You can change application pool identity by going to the web server and updating the application pools or by logging into the SharePoint Central Administration site and going to" ManageService Accounts". We will cover the second scenario here; that is, to add IUSR to the database.

1. Go to Microsoft SQL Server Management Studio and connect to your database server.
2. Expand the Security node and right-click the Logins node and select New Login.

3. In the Login Name, enter IUSR and click "Search….". This will open a new search box. Enter "IUSR" in the object name and click "Check Names". Click "OK".
4. You will notice that the Login Name has been populated with "MACHINENAME\IUSR" where "MACHINENAME" is your machine name, for example, in the figure below, you see "SP2013\IUSR. SP2013" is my machine name.

This is not what you want to add to the logins. Change "MACHINENAME" to "NT AUTHORITY" so Login Name should read "NT AUTHORITY\IUSR". Click "OK".

5. Now you may think that the user has been added and your external content type will work. Right? Wrong! You still have to map the user to the database, otherwise you will get the following error on the list page (where you are trying to load external content type):

The query against the database caused an error

This error occurs, as I said, because the user is not yet mapped to the database.

6. To map the user to the database, right-click "NT AUTHORITY\IUSR" in Logins and select "Properties"

7. There are two ways to do this mapping. One way is to add the user to one of the server roles, for example,  server adminorsys admin. This will provide useful rights to all databases and thus you won't have to do explicit mapping. To do this, on the properties page, click ServerRoles and check sysadmin. Click "OK". Obviously you would not want to do this in a real environment. So the other option is to map the user directly to the database that has been used in the external content type.

To add a user mapping, in "LoginProperties", click "User Mapping". Locate the database in the list and then check the box in the Map column. As soon as you check the box, "NT AUTHORITY\IUSER" appears in the User column. That's it. Click OK to save the setting. By the way, on the same properties page, you can also assign database role membership to the user for the database but that is not required.

Now, go back to the list page and reload it. You will see results from the external data source. Hope you enjoy this tutorial.

Removing and Replacing Default SharePoint Ribbon Styles

SharePoint 2010 (and most likely future versions) provides default styles in the ribbon. You can see these with the “Styles” and “Markup Styles” sections of the ribbon. Here is an example of the “Markup Styles” section in action.

Default Markup Styles

What if a client does not want the default ones in there? You could overwrite them in CSS, but most likely your client will not want all of the default ones available. The way to change this is to use the PrefixStyleSheet attribute on the RichHtmlField in your page layout. Here is an example of it in action using the default column for publishing content. (This is also where you can disable other parts of the ribbon using attributes such as AllowFonts=“False” to turn off the font selection option in the ribbon.)

<PublishingWebControls:RichHtmlField PrefixStyleSheet="mystyle"

FieldName="PublishingPageContent" runat="server">

</PublishingWebControls:RichHtmlField>




Changing the prefix for the custom styles will now remove them from the ribbon. Now using the following CSS, you can add selections to the “Styles” and “Markup Styles” section. (As a note, the default CSS prefix is “ms-rte”.)

/* Add to Styles Section */ .mystyleStyle-Bold   {   -ms-name:"Bold";   font-weight: bold; } /* Add to Markup Styles Section */ h3.mystyleElement-Title   {   -ms-name:"Heading 3";   font-size: 30px; }

Now you can see your custom styles in each dropdown. Notice that the “Markup Styles” styles necessitate an element on the selector.

Our New Markup Styles