CommunicationVM.cs
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using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using HandyControl.Data;
using HHECS.BllModel;
using HHECS.DAQClient.DataAccess;
using HHECS.DAQClient.Model;
using HHECS.DAQClient.View.CommunicationsView;
using LinqKit;
using System.Collections.ObjectModel;
using System.Linq.Expressions;
using MessageBox = HandyControl.Controls.MessageBox;
namespace HHECS.DAQClient.ViewModel.CommunicationVM
{
public partial class CommunicationVM : ObservableObject
{
[ObservableProperty]
private string code;
[ObservableProperty]
private string name;
[ObservableProperty]
private int pageIndex = 1;
[ObservableProperty]
private long maxPage;
[ObservableProperty]
private int pageSize = 30;
[ObservableProperty]
private ObservableCollection<CommunicationConfig> communicationConfigs = new ObservableCollection<CommunicationConfig>();
private readonly DataContext _context;
public CommunicationVM(DataContext context)
{
_context = context;
LoadData();
}
[RelayCommand]
public void Serach()
{
var result = LoadData();
if (!result.Success)
{
MessageBox.Error($"加载数据失败.{result.Msg}");
}
}
[RelayCommand]
public static void Add()
{
var view = new CommunicationAddView();
view.ShowDialog();
}
[RelayCommand]
public void Edit()
{
}
[RelayCommand]
public void Delete()
{
}
/// <summary>
/// 页码改变
/// </summary>
[RelayCommand]
private void PageUpdated(FunctionEventArgs<int> info)
{
PageIndex = info.Info;
LoadData();
}
private BllResult LoadData()
{
try
{
var query = _context.CommunicationConfigs.Where(GetFilter());
var total = query.Count();
MaxPage = total / PageSize + Convert.ToInt32(total % PageSize != 0);
var result = query.Page(PageIndex, PageSize).ToList();
CommunicationConfigs = new ObservableCollection<CommunicationConfig>(result);
return BllResultFactory.Success();
}
catch (Exception ex)
{
return BllResultFactory.Error(ex.Message);
}
}
private Expression<Func<CommunicationConfig, bool>> GetFilter()
{
var filter = PredicateBuilder.New<CommunicationConfig>(true);
if (!string.IsNullOrWhiteSpace(Code))
{
filter = filter.And(x => x.Code.Contains(Code));
}
if (!string.IsNullOrWhiteSpace(Name))
{
filter = filter.And(x => x.Name.Contains(Name));
}
return filter;
}
}
}