SharePoint 2010中开发模式的改进 COM 客户端对象模型

摘要: SharePoint Foundation 2010 中支持客户端对象模型，通过ClientObjectModel，可以很容易的访问服务器上的SharePoint数据，这样SharePoint 2010的开发就可以在32位机器进行了，我们还可以通过Client Object Model开发 ...

SharePoint Foundation 2010 中支持客户端对象模型，通过ClientObjectModel，可以很容易的访问服务器上的SharePoint数据，这样SharePoint 2010的开发就可以在32位机器进行了，我们还可以通过Client Object Model开发SharePoint的客户端，实现旁客户端，下面是Client Object Model和Server Object Model 的对照图：
Client-side classes and server-side equivalents

Client	Server
ClientContext	SPContext
Site	SPSite
Web	SPWeb
List	SPList
ListItem	SPListItem
Field	SPField

SPWeb oWebsite = SPContext.Current.Web;

using (SPWeb oWebsiteRoot = SPContext.Current.Site.RootWeb)
{
    ...
}
 

using(SPWeb oWebsite = SPContext.Current.Site.OpenWeb("Website_URL"))
{
    ...
}

using(SPSite oSiteCollection = new SPSite("http://Server_Name"))
{
    using(SPWeb oWebsite = oSiteCollection.OpenWeb("Website_URL"))
    {
        using(SPWeb oWebsiteRoot = oSiteCollection.RootWeb)
        {
           ...
        }
    }
}

SPList oListCur = SPContext.Current.List;
SPWeb oWeb = SPContext.Current.Web;
SPSite oSite = SPContext.Current.Site;
SPWebApplication oWebApplicationCur = SPContext.Current.Site.WebApplication;

using(SPWeb oWeb = SPContext.Current.Site.OpenWeb(guidWebsite))
{
    SPUser oUser = SPContext.Current.Web.CurrentUser;
}

SPSiteDataQuery oSiteQuery = new SPSiteDataQuery();
oSiteQuery.Query = "<Where><Gt><FieldRef Name=\"ID\" />" +
    "<Value Type = \"Number\">100</Value></Gt></Where>";
oSiteQuery.ViewFields = "<FieldRef Name=\"Title\"/>";
DataTable oQueryResults = SPContext.Current.Web.GetSiteData(oSiteQuery);
oQueryResults.TableName = "queryTable";
oQueryResults.WriteXml("C:\\queryTable.xml");

SPListItem item = (SPListItem)SPContext.Current.Item;

using (SPSite site = new SPSite("http://localhost"))
            {
                using (SPWeb web = site.RootWeb)
                {
                    SPList list = web.Lists.TryGetList("Announcements");
                    if (list != null)
                    {
                        SPField fld = list.Fields[SPBuiltInFieldId.Expires];
                        fld.DefaultFormula = "=TODAY()+7";
                        fld.Update();
                    }
                }
            }
            Console.Write("\nPress ENTER to continue....");
            Console.Read();

A User field contains a string in the form ID;#User_Display_Name, where ID is the member identifier (ID) of the associated user. The following example parses the value of an Assigned To field to return an SPUser object.

string strUserValue = oList["Assigned To"];
int intIndex = strUserValue.IndexOf(';');
int intID = Int32.Parse(strUserValue.Substring(0, intIndex));
SPUser oUser = oWebsite.SiteUsers.GetByID(intID);