SharePoint 2010 List Tutorials

We will discuss about SharePoint 2010 list and also we will some code sample of SharePoint 2010 object model.

• You can access a List by its name or by its URL.
• When retrieving a list by name, you can use the TryGetList method of the SPListCollection, which returns null if the list does not exist.
• When retrieving the list by the URL, you can use the GetList method of the SPWeb object, which throws a System.IO.FileNotFoundException if the list does not exist.

Code Samples:

using (SPSite siteCollection = new SPSite("Site URL"))

{

using (SPWeb site = siteCollection.OpenWeb)

{

SPList lstName = site.Lists.TryGetList("NameOfTheList");

if(lstName  != null)

//do your work

else

//List does not exists

try

{

SPList taskList = site.GetList("/Lists/Tasks");

//do your work

}

catch(FileNotFoundException)

{

//List does not work

}

}

}

• Lists maintain items in a Microsoft.SharePoint.SPListItemCollection object, which is accessible via the Items property of SPList.
• Items in the collection are returned as Microsoft.SharePoint.SPListItem objects.
• You can iterated over using a foreach statement, or directly accessed using either the item’s ID or index.
• Each individual SPListItem maintains a Hashtable of values representing the properties of the item.

//Add new item to list

SPListItem newItem = list.Items.Add;

newItem["Title"] = "This will be the title";

newItem.Update;

//Bind the item to gridview

SPListItemCollection items = list.Items;

gridview1.DataSource = items;

gridview1.DataBind;

//Delete Item by Index

list.Items[0].Delete;

//Update Item by Index

SPListItem updateItem = list.Items[0];

updateItem["Title"] = "Updated Title";

updateItem.Update;

• when creating new items in a list, the Update method must be called to save the new item. If the Update method is not called, then the list item will be lost.
• if the item was edited by another user before the update is saved, the operation will fail.