Create, Update, and Delete List Items using C O M

Creating Items:

To create list items, you create a ListItemCreationInformation object, set its properties, and pass it as parameter to the AddItem(ListItemCreationInformation) method of the List class. Set properties on the list item object that this method returns, and then call the Update() method, as seen in the following example.

using System;
using Microsoft.SharePoint.Client;
using SP = Microsoft.SharePoint.Client;

namespace Microsoft.SDK.SharePointServices.Samples
{
    class CreateListItem
    {
        static void Main()
        {  
            string siteUrl = "http://MyServer/sites/MySiteCollection";

            ClientContext clientContext = new ClientContext(siteUrl);
            SP.List oList = clientContext.Web.Lists.GetByTitle("Announcements");

            ListItemCreationInformation itemCreateInfo = new ListItemCreationInformation();
            ListItem oListItem = oList.AddItem(itemCreateInfo);
            oListItem["Title"] = "My New Item!";
            oListItem["Body"] = "Hello World!";

            oListItem.Update();

            clientContext.ExecuteQuery();
        }
    }
}

Updating a list item


To set most list item properties, you can use a column indexer to make an assignment, and call the Update() method so that changes will take effect when you call ExecuteQuery() or ExecuteQueryAsync(ClientRequestSucceededEventHandler, ClientRequestFailedEventHandler). The following example sets the title of the third item in the Announcements list.

using System;
using Microsoft.SharePoint.Client;
using SP = Microsoft.SharePoint.Client;

namespace Microsoft.SDK.SharePointServices.Samples
{
    class UpdateListItem
    {
        static void Main()
        {  
            string siteUrl = "http://MyServer/sites/MySiteCollection";

            ClientContext clientContext = new ClientContext(siteUrl);
            SP.List oList = clientContext.Web.Lists.GetByTitle("Announcements");
            ListItem oListItem = oList.Items.GetById(3);

            oListItem["Title"] = "My Updated Title.";

            oListItem.Update();

            clientContext.ExecuteQuery();
        }
    }
}
Deleting Items from List

To delete a list item, call the DeleteObject() method on the object. The following example uses the GetItemById() method to return the second item from the list, and then deletes the item.
SharePoint Foundation 2010 maintains the integer IDs of items within collections, even if they have been deleted. So, for example, the second item in a list might not have 2 as its identifier. A ServerException is returned if the DeleteObject() method is called for an item that does not exist.

using System;
using Microsoft.SharePoint.Client;
using SP = Microsoft.SharePoint.Client;

namespace Microsoft.SDK.SharePointServices.Samples
{
    class DeleteListItem
    {
        static void Main()
        {  
            string siteUrl = "http://MyServer/sites/MySiteCollection";

            ClientContext clientContext = new ClientContext(siteUrl);
            SP.List oList = clientContext.Web.Lists.GetByTitle("Announcements");
            ListItem oListItem = oList.GetItemById(2);

            oListItem.DeleteObject();

            clientContext.ExecuteQuery();
        }
    }
}

Dlls not deployed to GAC SP 2013 + Visual Stuio 2012

Target frame work in 4.0 and up , Assembly Location is

C:\windows\microsoft.net\assembly\GAC_MSIL

Out Put Location :

GAC in .NET versions 1.0 through 3.5 are remain same.

C:\windows\assembly\GAC_MSIL

Error When Deplying Master page in GhostableInLibrary Files

Below is the code form the elements.xml file from the MasterPages module.

Wrong code Snippet :

<?xml version="1.0" encoding="utf-8"?> <Elements xmlns="http://schemas.microsoft.com/sharepoint/">   <Module Name="MasterPages">     <File Path="MasterPages\Portal.master" Url="Portal.master" IgnoreIfAlreadyExists="True"  Type="GhostableInLibrary" />   </Module> </Elements>

Correct code snippet :

<?xml version="1.0" encoding="utf-8"?> <Elements xmlns="http://schemas.microsoft.com/sharepoint/">   <Module Name="MasterPages" Url="_catalogs/masterpage" List="116">     <File Path="MasterPages\Portal.master" Url="Portal.master" IgnoreIfAlreadyExists="True" Type="GhostableInLibrary" />   </Module> </Elements>