Using Microsoft Sharepoint APIs we can easily Add, Update and Delete list items programmatically. Provided below is a code snippet in C# .Net demonstrating all the three operations..

using (SPSite oSPsite = new SPSite("http://website url/")) { using (SPWeb oSPWeb = oSPsite.OpenWeb())       {             oSPWeb.AllowUnsafeUpdates = true;               // Fetch the List             SPList list = oSPWeb.Lists["MyList"];                                 //Add a new item in the List             SPListItem itemToAdd = list.Items.Add();             itemToAdd["Title"] = "Test Title";             itemToAdd["Description"] = "Test Description";             itemToAdd.Update();               // Get the Item ID             listItemId = itemToAdd.ID;               // Update the List item by ID             SPListItem itemToUpdate = list.GetItemById(listItemId);             itemToUpdate["Description"] = "Changed Description";             itemToUpdate.Update();               // Delete List item             SPListItem itemToDelete = list.GetItemById(listItemId);             itemToDelete.Delete();               oSPWeb.AllowUnsafeUpdates = false;        } }

Thanks,

Sreekanth Reddy M