SharePoint Development using C#

Before you start developing you need a reference to "using Microsoft.SharePoint;" namespace.

Working with a list

Short description of some classes:

Site Organization Classes
SPContext -
SPWebCollection -
SPListCollection -
SPWeb - represents site;
SPSite - represents site collection;
SPList -

List Classes
SPField -
SPView -
SPListItem -


Getting the Current Website
SPWeb web = SPContext.Current.Web;

Site Collection Navigation

SPSite siteCollection = SPContext.Current.Site;
SPWeb rootWeb = siteCollection.RootWeb;
TreeNode rootNode = new TreeNode(rootWeb.Title);
treeSiteCollection.Nodes.Add(rootNode);
addSubWebsToTree(rootWeb, rootNode);

Create a list
SPWeb web = SPContext.Current.Web;
web.AllowUnsafeUpdates = true;

SPList list;
try
{
list = web.Lists["Student Assignments"];
}

catch(Exception ex)
{
System.Guid listID
= web.Lists.Add("Student Assignments", "", SPListTemplateType.Tasks);
list = web.Lists[listID];
}

Creating a column in a list
SPFieldCollection fields = list.Fields;
SPField gradeField;
if (fields.ContainsField("Grade"))
{
gradeField = fields["Grade"];
}
else
{
fields.Add("Grade", SPFieldType.Number, false);
}

Adding Field to default view of the list
SPView defaultView = list.DefaultView;
if (!defaultView.ViewFields.Exists("Grade"))
{
defaultView.ViewFields.Add("Grade");
defaultView.Update();
}

Creating a new list item
SPListItemCollection items = list.Items;
SPListItem newItem = items.Add();
newItem["Title"] = "Homework 1";
newItem["DueDate"] = System.DateTime.Now;
newItem["Grade"] = 5; newItem.Update();