Sharepoint Custom Application Page

http://msdn.microsoft.com/en-us/library/bb418732.aspx

<%@ Assembly Name=”Microsoft.SharePoint, [full 4-part assembly name]“%>
<%@ Page Language=”C#” MasterPageFile=”~/_layouts/application.master”
         Inherits=”Microsoft.SharePoint.WebControls.LayoutsPageBase” %>

<%@ Import Namespace=”Microsoft.SharePoint” %>

<script runat=”server”>
  protected override void OnLoad(EventArgs e) {
    SPWeb site = this.Web;
    lblSiteTitle.Text = site.Title;
    lblSiteID.Text = site.ID.ToString().ToUpper();
  }
</script>

<asp:Content ID=”Main” runat=”server”
             contentplaceholderid=”PlaceHolderMain” >
  Site Title: <asp:Label ID=”lblSiteTitle” runat=”server” />
  <br/>
  Site ID: <asp:Label ID=”lblSiteID” runat=”server” />
</asp:Content>

<asp:Content ID=”PageTitle” runat=”server”
             contentplaceholderid=”PlaceHolderPageTitle” >
   Hello World
</asp:Content>

<asp:Content ID=”PageTitleInTitleArea” runat=”server”
             contentplaceholderid=”PlaceHolderPageTitleInTitleArea” >
   The Quintessential ‘Hello World’ of Application Page
</asp:Content>

Different project types.

http://nishantrana.wordpress.com/2009/02/26/create-a-simple-hello-world-custom-application-page-in-sharepoint/

Reading list and items from application page.

http://msdn.microsoft.com/en-us/library/bb418733.aspx

SPSite siteCollection = this.Site;
SPWeb site = this.Web;
// obtain query string values
string ListId = Request.QueryString["ListId"];
string ItemId = Request.QueryString["ItemId"];
// create list object and list item object
SPList list = site.Lists[new Guid(ListId)];
SPListItem item = list.Items.GetItemById(Convert.ToInt32(ItemId));
// query for information about list and list item
string ListTitle = list.Title;
string ItemTitle = item.Title;