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;
//添加命名空间
using System.ServiceModel.DomainServices.Client;
using ScoreManagement.Web;namespace ScoreManagement
{enum ButtonModel{ Edit,Add,Cancel}public partial class Test2 : UserControl{ButtonModel buttonModel = ButtonModel.Cancel;     DomainService1 client = new DomainService1();public Test2(){InitializeComponent();this.Loaded += new RoutedEventHandler(StudentInfoManage_Loaded);}void StudentInfoManage_Loaded(object sender, RoutedEventArgs e){//把一个entityset绑定到dataform，添加删除按钮均不可用是什么原因//因为client.Students 是 EntitySet类型的，它并没有实现INotifyCollectionchanged以及iNotifyPropertyChanged接口。//this.dataForm1.ItemsSource = client.Students;//client.Load(client.GetStudentsQuery());//所以用如下方法:          LoadOperation<Student> lo = client.Load(client.GetStudentsQuery());lo.Completed += new EventHandler(lo_Completed);}void lo_Completed(object sender, EventArgs e){dataForm1.CommitButtonContent = "保存";dataForm1.CancelButtonContent = "取消";dataForm1.AutoEdit = false;dataForm1.AutoCommit = true;LoadOperation<Student> lo = (LoadOperation<Student>)sender;//这里如果是 this.dataForm1.ItemsSource = lo.Entities，还是不能进行 “添加"和“删除”操作的.一定要ToList()下dataForm1.ItemsSource = lo.Entities.ToList();        //dataForm1.CurrentItem = lo.Entities.FirstOrDefault();dataForm1.DeletingItem += new EventHandler<System.ComponentModel.CancelEventArgs>(dataForm1_DeletingItem);         dataForm1.EditEnded += new EventHandler<DataFormEditEndedEventArgs>(dataForm1_EditEnded);dataForm1.CommandButtonsVisibility = DataFormCommandButtonsVisibility.All;dataForm1.AddingNewItem+=new EventHandler<DataFormAddingNewItemEventArgs>(dataForm1_AddingNewItem);dataForm1.BeginningEdit += new EventHandler<System.ComponentModel.CancelEventArgs>(dataForm1_BeginningEdit);   }//设置编辑模式void dataForm1_BeginningEdit(object sender, System.ComponentModel.CancelEventArgs e){buttonModel = ButtonModel.Edit;}   //点"+"后的编辑模板,如果是“Commit”操作void dataForm1_EditEnded(object sender, DataFormEditEndedEventArgs e){//如果提交 把该项添加到数据库if (e.EditAction == DataFormEditAction.Commit){//添加if (buttonModel == ButtonModel.Add){Student student = dataForm1.CurrentItem as Student;client.Students.Add(student);client.SubmitChanges();}//编辑if (buttonModel == ButtonModel.Edit){Student student = dataForm1.CurrentItem as Student;                  client.SubmitChanges();}}//取消if (e.EditAction == DataFormEditAction.Cancel){buttonModel = ButtonModel.Cancel;}}//设置添加模式void dataForm1_AddingNewItem(object sender, DataFormAddingNewItemEventArgs e){//设置为添加模式buttonModel = ButtonModel.Add;}//删除void dataForm1_DeletingItem(object sender, System.ComponentModel.CancelEventArgs e){//MessageBoxResult result= MessageBox.Show("你确定要删除该项吗?", "提示", MessageBoxButton.OKCancel);//if (result == MessageBoxResult.OK)//{//    //MessageBox.Show("恭喜你！删除成功！");//}
            Student student = dataForm1.CurrentItem as Student;client.Students.Remove(student);client.SubmitChanges(OnSubmitCompleted, null);           }//异常处理public void OnSubmitCompleted(SubmitOperation so){if (so.Error != null){string message = so.Error.Message;if (so.EntitiesInError.Any()){message = string.Empty;Entity entityError = so.EntitiesInError.First();if (entityError.EntityConflict != null){EntityConflict confict = entityError.EntityConflict;foreach (string s in confict.PropertyNames){message += string.Format("Member '{0}' in confict /r/n", s);}}else if(entityError.ValidationErrors.Any()){foreach (System.ComponentModel.DataAnnotations.ValidationResult vr in entityError.ValidationErrors){message += string.Format("{0}/r/n",vr.ErrorMessage);}}}MessageBox.Show(message,"操作失败!",MessageBoxButton.OK);}}}
}