Introduction
Today, in this article let's play around with one of the interesting and most useful concepts in SharePoint 2010.
Question: What is retrieving lists via COM?
In simple terms "To enable retrieval of all lists in the web using the client object model".
Step 1: Open Visual Studio 2010 and create an "ASP.NET Web Forms Application", as in:
![open-asp.net-web-application.jpg]()
Now two references need to be added to the application, they are:
Step 2: The complete code of webform1.aspx looks like this:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="RetrieveListinWebApp._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<center>
<div>
<table style="text-align: center">
<tr>
<td colspan="2">
<asp:Label ID="Label1" runat="server" Text="Client Object Model - Show Lists - SharePoint 2010 Programatically"
Font-Bold="true" Font-Size="Large" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>
</td>
</tr>
<tr>
<td colspan="2">
<br />
<asp:Button ID="Button1" runat="server" Text="Show All Lists" Font-Names="Verdana"
Width="282px" BackColor="Orange" Font-Bold="True" OnClick="Button1_Click" />
</td>
</tr>
<tr>
<td colspan="2">
<br />
<asp:ListBox ID="ListBox1" runat="server" Height="399px" Width="239px"></asp:ListBox>
</td>
</tr>
</table>
</div>
</center>
</form>
</body>
</html>
Step 3: The complete code of webform1.aspx.cs looks like this:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.SharePoint.Client;
namespace RetrieveListinWebApp
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
ClientContext objContext = new ClientContext("http://win-kv3bo1rqqf7:25339/");
Web objWeb = objContext.Web;
objContext.Load(objWeb.Lists, alllists => alllists.Include(list => list.Title, list => list.Id));
objContext.ExecuteQuery();
foreach (List list in objWeb.Lists)
{
ListBox1.Items.Add(list.Title);
}
}
}
}
Step 4: The output of the application looks like this:
![client-object-model-show-list-sharepoint2010.jpg]()
Step 5: The lists retrieved output of the application looks like this:
![show-list-client-object-model-sharepoint2010.jpg]()
I hope this article is useful for you.