It's the Demo Ghost !

I don't know why is this happen but there is one very strange relation between live demo and not live demo.

No matter how good you have tested the code of your demo, how many times you have recreated the actions you are going to show - there is always 'something' that happens in a real demo.

So the simple rule of the "Something" means - don't believe too much in the demo, there is always something that can happen.

Really really strange ...

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ClientPeoplePicker in SharePoint 2013

Start using SharePoint 2013 I noticed that the way for selecting people or groups is changed. The new way is simple – just ‘Enter name or email address’ without any icons for ‘Check Names’ or ‘Browse’. I guess that the PeoplePicker is changed but NO. PeoplePicker sitll has the same functionality as before. There is a new control called ClientPeoplePicker . How to use it: 1. Add this references <% @ Register TagPrefix ="wssawc" Namespace ="Microsoft.SharePoint.WebControls" Assembly ="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> 2. Add the following control declaration < wssawc : ClientPeoplePicker Required ="true" ValidationEnabled ="true" ID ="peoplePicker" runat ="server" ...

Error: A duplicate field name "xxxx" was found

Soon I have some experience with migrating solution from SharePoint 2010 to SharePoint 2013. The migration was on 3 steps. First one was just to copy the custom fields, content types and list definitions from the old VS 2010 project into a new VS 2012 project for SharePoint 2013. Looks like pretty simple task but ….. The problem: Error “ A duplicate field name "xxxx" was found ” when the feature for provisioning the fields and content types is activated. The solution: Review the field definitions and make sure no field has Name property equal to some of the ‘reserved’ values. Explanations: In SharePoint 2010 there was no problem to have these fields as a definition of custom fields: < Field Type = " Note " ID = " {893FB9BC-2DA4-4451-A1D1-88010CDC6A08} " Name = " Description " StaticName = " Description " DisplayName = " Description 1 " Requi...

SharePoint and List Joins with CAML

This came to me as an issue when I started migrating one project from SharePoint 2010 to SharePoint 2013. The code uses LINQ to SharePoint and it was not written in a clever way. We decide to use CAML queries and optimize the code. The scenario: Create gridview that gathers information from three(or more) lists. The problem: How to create the CAML query joins and projected fields correctly. Explanation : Option 1: Get generated CAML query from LINQ to SharePoint code This doesn’t work. I wrote the LINQ to SharePoint code connected the three lists. When I executed the code the following error was thrown – “ The query uses unsupported elements, such as references to more than one list, or the projection of a complete entity by using EntityRef/EntitySet. ” Here is some explanation about it and why this can’t be used. Option 2: Write the query yourself I found this article in MSDN . Read it ! The second part in it is exactly my scenario. But it takes me a lot of time to un...

SPObject.Resolve()

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