sharepoint 2010 开发人员演练 练习三

为客户端对象模型创建silverlight应用程序 后台代码

PDF里打得不清楚，这边整理一下

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.SharePoint.Client;

namespace SPSilverlightExample
{
    public class Project
    {
        public string Title { get; set; }
        public DateTime DueDate { get; set; }
        public string Description { get; set; }
    }
    public partial class MainPage : UserControl
    {
        private ListItemCollection _projects;
        public  MainPage()
        {
            InitializeComponent();
            ClientContext context = new ClientContext(ApplicationContext.Current.Url);
            context.Load(context.Web);
            List Projects = context.Web.Lists.GetByTitle("Projects");
            context.Load(Projects);

            CamlQuery query = new Microsoft.SharePoint.Client.CamlQuery();
            string camlQueryXml = "<View><Query><Where><Gt>" +
                "<FieldRef Name='Due_x0020_Date' />" +
                "<Value Type='DateTime'>2008-01-1T00:00:00Z</Value>" +
                "</Gt></Where></Query><ViewFields>" +
                "<FieldRef Name=/"Title/" /><FieldRef Name=/"Description/" />" +
               "<FieldRef Name=/"Due_x0020_Date/" />" +
                "</ViewFields></View>";

            query.ViewXml = camlQueryXml;
            _projects = Projects.GetItems(query);
            context.Load(_projects);
            context.ExecuteQueryAsync(new
            ClientRequestSucceededEventHandler(OnRequestSucceeded), null);
        }
        private void OnRequestSucceeded(Object sender, ClientRequestSucceededEventArgs args)
        {
            // this is not called on the UI thread
            Dispatcher.BeginInvoke(BindData);
        }

        private void BindData()
        {
            List<Project> projects = new List<Project>();
            foreach (ListItem li in _projects)
            {
                projects.Add(new Project()
                {
                    Title = li["Title"].ToString(),
                    DueDate = Convert.ToDateTime(li["Due_x0020_Date"].ToString()),
                    Description = li["Description"].ToString()
                });
            }
            dataGrid1.ItemsSource = projects; // must be on UI thread
        }

    }
}