public class RelayCommand : ICommand
{

private bool _isenabled;
private Action _handler = null;
public RelayCommand(Action handler)
{
_handler = handler;
}

/// <summary>
///
/// </summary>
public bool IsEnabled
{
get { return _isenabled; }
set
{
_isenabled = value;
if (CanExecuteChanged != null)
{
this.CanExecuteChanged(this, EventArgs.Empty);
}
}
}

/// <summary>
/// 是否启用
/// </summary>
/// <param name="parameter"></param>
/// <returns></returns>
public bool CanExecute(object parameter)
{
//throw new NotImplementedException();
return IsEnabled;
}

public event EventHandler CanExecuteChanged;

/// <summary>
/// 执行
/// </summary>
/// <param name="parameter"></param>
public void Execute(object parameter)
{
//throw new NotImplementedException();
_handler();
}
}

定义好此类之后则可以开始做增删改查操作。

六、ViewModel

一、首先是baseViewModel

public class BaseViewModel
{
/// <summary>
/// 服务
/// </summary>
protected static ServiceReference1.Service1Client _service = null;
/// <summary>
/// 用户姓名
/// </summary>
protected static string UserName = null;
/// <summary>
/// 用户ID
/// </summary>
protected static int UserID = 0;
/// <summary>
/// 级别ID
/// </summary>
protected static int LevelID = 0;
/// <summary>
/// 操作的窗体
/// </summary>
protected Window windows = null;
/// <summary>
///
/// </summary>
public BaseViewModel()
{
if (_service == null)
{
_service = new ServiceReference1.Service1Client();//这个是我调用wcf的方法。
}
}

二、CompanyViewModel

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections.ObjectModel;
using Model;
using System.ComponentModel;
using System.Windows.Input;
using System.Windows;

public class CompanyInfoViewModel : BaseViewModel, INotifyPropertyChanged
{
private ObservableCollection<CompanyInfoModel> _companyInfoList;
public ObservableCollection<CompanyInfoModel> CompanyInfoList
{
get
{
return _companyInfoList;
}
set
{
if (_companyInfoList != value)
{
_companyInfoList = value;
OnPropertyChanged("CompanyInfoList");
}
}
}

public CompanyInfoViewModel()
{
//构造函数中初始化家庭成员列表
CompanyInfoModel model = new CompanyInfoModel();
List<CompanyInfoModel> list = _service.GetCompanyInfoByPage(0, model).ToList();
_companyInfoList = new ObservableCollection<CompanyInfoModel>(list);

_addCompanyCommand = new RelayCommand(addCompanyCommand) { IsEnabled = true };
_searchCompanyCommand = new RelayCommand(searchCompanyCommand) { IsEnabled = true };
_delCompanyCommand = new RelayCommand(delCompanyCommand) { IsEnabled = true };
_updCompanyCommand = new RelayCommand(updCompanyCommand) { IsEnabled = true };
}

#region 绑定的事件

private ICommand _addCompanyCommand;
public ICommand AddCompanyCommand
{
get { return _addCompanyCommand; }
}

private ICommand _searchCompanyCommand;
public ICommand SearchCompanyCommand
{
get { return _searchCompanyCommand; }
}

private ICommand _delCompanyCommand;
public ICommand DelCompanyCommand
{
get { return _delCompanyCommand; }
}

private ICommand _updCompanyCommand;
public ICommand UpdCompanyCommand
{
get { return _updCompanyCommand; }
}

private CompanyInfoModel _companyModel =