Query a workflow status using caml query:

Recently I have got a requirement like need to display the list of items which are all having the workflow status is “In Progress”.

I used caml query to filter the date based on workflow status: “In Progress” like below:

<Query>
       <Where>
                  <Neq>
                          <FieldRef Name="MyWorkflowStatusName" />
                          <Value Type="WorkflowStatus">In Progress</Value>
                 </Neq>
         </Where>
</Query>

Add Button to sharepoint Ribbon control using visual studio 2012

In this task, you will add a custom action to the ribbon of all Document Libraries to launch the App.

1. In Visual Studio, right click the HelloApp node and select AddØNew Item from the Context menu.
2. In the New Item dialog, select Ribbon Custom Action.
3. Name the item Launcher and click Add.

Create Client Web Part to the App using visual studio 2012

In this task, you will add a Client Web Part and code it. This web part can be used on pages outside of the App to add functionality to the hosting SharePoint site.

• Add a Client Web Part
• In the Solution Explorer, right click the HelloApp project node and select Add-->New Item from the context menu.
• In the Add New Item dialog, select Client Web Part.
• Name the new item MyClientWebPart and click Add.

Creating a Custom List using Visual studio 2012:

In this exercise, you will work through the basics of creating, testing and debugging a custom list type using the new list designer in Visual Studio 2012.
Download:  https://sites.google.com/site/sasivalipireddy/home/Create custom list using VS2012.pdf 

1. Launch Visual Studio 2012.

2. Create a new SharePoint 2013 – Empty Project and name this new project CustomListSolution. Click OK on the New Project dialog.

Show only login user's documents from document library

We can get the current logged user created documents only from the document library by following the below approaches:

1. By using views.
2. By using “Relevant documents” web part[OOWP]

View:

Create a view and set the filter to filter by Created By or Modified By to use the [Me] value.