Create/Update/Delete list items using Client Object Model in SharePoint 2010

 how to create, update and delete list items using Client Object Model in SharePoint 2010.


Create List Item:

Add the references Microsoft.SharePoint.dll and Microsoft.SharePoint.Client.dll.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Client;
namespace CreateListItem
{
    class Program
    {
        static void Main(string[] args)
        {
            string siteUrl = "http://servername:12345/";
            ClientContext clientContext = new ClientContext(siteUrl);
            List oList = clientContext.Web.Lists.GetByTitle("");
            ListItemCreationInformation listCreationInformation = new ListItemCreationInformation();
            ListItem oListItem = oList.AddItem(listCreationInformation);
            oListItem["Title"] = "Hello World";
            oListItem.Update();
            clientContext.ExecuteQuery();
        }
    }
}


Update List Item:

Add the references Microsoft.SharePoint.dll and Microsoft.SharePoint.Client.dll.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Client;

namespace UpdateListItem
{
    class Program
    {
        static void Main(string[] args)
        {
            string siteUrl = "http://servername:12345/";
            ClientContext clientContext = new ClientContext(siteUrl);
            List oList = clientContext.Web.Lists.GetByTitle("");
            ListItem oListItem = oList.GetItemById(5);
            oListItem["Title"] = "Hello World Updated!!!";
            oListItem.Update();
            clientContext.ExecuteQuery();
        }
    }
}


Delete List Item:

Add the references Microsoft.SharePoint.dll and Microsoft.SharePoint.Client.dll.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Client;

namespace UpdateListItem
{
    class Program
    {
        static void Main(string[] args)
        {
            string siteUrl = "http://servername:12345/";
            ClientContext clientContext = new ClientContext(siteUrl);
            List oList = clientContext.Web.Lists.GetByTitle("");
            ListItem oListItem = oList.GetItemById();         
            oListItem.DeleteObject();
            clientContext.ExecuteQuery();
        }
    }
}