WPF实战学习笔记21-自定义首页添加对话服务

自定义首页添加对话服务

定义接口与实现

添加自定义添加对话框接口

添加文件:Mytodo.Dialog.IDialogHostAware.cs

using Prism.Commands;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Mytodo.Dialog
{
    public interface IDialogHostAware
    {
        /// 
        /// DialoHost名称
        /// 
        string DialogHostName { get; set; }

        /// 
        /// 打开过程中执行
        /// 
        /// 
        void OnDialogOpend(IDialogParameters parameters);

        /// 
        /// 确定
        /// 
        DelegateCommand SaveCommand { get; set; }

        /// 
        /// 取消
        /// 
        DelegateCommand CancelCommand { get; set; }
    }
}

添加自定义添加对话框显示接口

注意dialogHostName应与view中dialoghost 的Identifier属性一致

using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Mytodo.Dialog
{
    public interface  IDialogHostService:IDialogService
    {
        /// 
        /// 显示Dialog方法
        /// 
        /// 
        /// 
        /// 
        /// 
        Task ShowDialog(string name, IDialogParameters parameters, string dialogHostName = "Root");
    }
}

实现IDialogHostService接口

添加文件:Mytodo.Dialog.DialogHostService.cs

DialogHostService实现了自定义的IDialogHostService接口,以及DialogService类.

DialogService:可参考https://www.cnblogs.com/chonglu/p/15159387.html

Prism提供了一组对话服务, 封装了常用的对话框组件的功能, 例如:

  • RegisterDialog/IDialogService (注册对话及使用对话)
  • 打开对话框传递参数/关闭对话框返回参数
  • 回调通知对话结果
using MaterialDesignThemes.Wpf;
using Prism.Ioc;
using Prism.Mvvm;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace Mytodo.Dialog
{
    public class DialogHostService:DialogService, IDialogHostService
    {
        private readonly IContainerExtension containerExtension;

        public DialogHostService(IContainerExtension containerExtension) : base(containerExtension)
        {
            this.containerExtension = containerExtension;
        }

        public async Task ShowDialog(string name, IDialogParameters parameters, string dialogHostName = "Root")
        {
            if (parameters == null)
                parameters = new DialogParameters();

            //从容器当中去除弹出窗口的实例
            var content = containerExtension.Resolve(name);

            //验证实例的有效性 
            if (!(content is FrameworkElement dialogContent))
                throw new NullReferenceException("A dialog's content must be a FrameworkElement");

            if (dialogContent is FrameworkElement view && view.DataContext is null && ViewModelLocator.GetAutoWireViewModel(view) is null)
                ViewModelLocator.SetAutoWireViewModel(view, true);

            if (!(dialogContent.DataContext is IDialogHostAware viewModel))
                throw new NullReferenceException("A dialog's ViewModel must implement the IDialogAware interface");

            viewModel.DialogHostName = dialogHostName;

            DialogOpenedEventHandler eventHandler = (sender, eventArgs) =>
            {
                if (viewModel is IDialogHostAware aware)
                {
                    aware.OnDialogOpend(parameters);
                }
                eventArgs.Session.UpdateContent(content);
            };

            return (IDialogResult)await DialogHost.Show(dialogContent, viewModel.DialogHostName, eventHandler);
        }
    }
}
 
  

添加对应的窗体

添加AddMemoView

添加文件Mytodo.Views.Dialogs.AddMemoView.xaml


    
        
            
            
            
        

        

        

            

            
        

        
            

添加文件:Mytodo.Views.Dialogs.AddMemoViewmodel.cs

using MaterialDesignThemes.Wpf;
using Mytodo.Dialog;
using MyToDo.Share.Models;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Mytodo.ViewModels.Dialogs
{
    internal class AddMemoViewModel : BindableBase, IDialogHostAware
    {
        public AddMemoViewModel()
        {
            SaveCommand = new DelegateCommand(Save);
            CancelCommand = new DelegateCommand(Cancel);
        }

        private MemoDto model;

        public MemoDto Model
        {
            get { return model; }
            set { model = value; RaisePropertyChanged(); }
        }

        private void Cancel()
        {
            if (DialogHost.IsDialogOpen(DialogHostName))
                DialogHost.Close(DialogHostName, new DialogResult(ButtonResult.No));
        }

        private void Save()
        {
            if (string.IsNullOrWhiteSpace(Model.Title) ||
                string.IsNullOrWhiteSpace(model.Content)) return;

            if (DialogHost.IsDialogOpen(DialogHostName))
            {
                //确定时,把编辑的实体返回并且返回OK
                DialogParameters param = new DialogParameters();
                param.Add("Value", Model);
                DialogHost.Close(DialogHostName, new DialogResult(ButtonResult.OK, param));
            }
        }

        public string DialogHostName { get; set; }
        public DelegateCommand SaveCommand { get; set; }
        public DelegateCommand CancelCommand { get; set; }

        public void OnDialogOpend(IDialogParameters parameters)
        {
            if (parameters.ContainsKey("Value"))
            {
                Model = parameters.GetValue("Value");
            }
            else
                Model = new MemoDto();
        }
    }
}

添加AddTodoView

添加文件Mytodo.Views.Dialogs.AddtodoView.xaml


    
        
            
        
    
    
        
            
                
                    
                    
                        
                        
                            
                            
                        
                    
                    
                    
                    

添加文件:Mytodo.Views.Dialogs.AddTodoViewmodel.cs

using Mytodo.Common.Models;
using Mytodo.Service;
using Prism.Commands;
using Prism.Ioc;
using Prism.Mvvm;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using MyToDo.Share.Models;
using System.Threading.Tasks;
using Prism.Regions;
using System.Windows;

namespace Mytodo.ViewModels
{
    public class TodoViewModel: NavigationViewModel
    {
        #region 命令定义

        /// 
        /// 展开侧边栏
        /// 
        public DelegateCommand OpenRightContentCmd { set; get; }

        /// 
        /// 打开选择的项
        /// 
        public DelegateCommand SelectedCommand { get; set; }

        /// 
        /// 添加、编辑 项
        /// 
        public DelegateCommand ExecuteCommand { get; set; }

        /// 
        /// 删除项
        /// 
        public DelegateCommand DeleteCommand { get; set; }

        #endregion

        #region 属性定义


        /// 
        /// 项目状态
        /// 
        public int SelectIndex
        {
            get { return selectIndex; }
            set { selectIndex = value; RaisePropertyChanged(); }
        }


        /// 
        /// 当前选中项
        /// 
        public ToDoDto? CurrDto
        {
            get { return currDto; }
            set { currDto = value; RaisePropertyChanged(); }
        }

        /// 
        /// 指示侧边栏是否展开
        /// 
        public bool IsRightOpen
        {
            get { return isRightOpen; }
            set { isRightOpen = value; RaisePropertyChanged(); }
        }

        /// 
        /// todo集合
        /// 
        public ObservableCollection? TodoDtos
        {
            get { return todoDtos; }
            set { todoDtos = value; RaisePropertyChanged(); }
        }

        /// 
        /// 右侧侧边栏标题
        /// 
        public string RightContentTitle
        {
            get { return rightContentTitle; }
            set { rightContentTitle = value;RaisePropertyChanged(); }
        }

        /// 
        /// 要搜索的字符串
        /// 
        public string SearchString
        {
            get { return search; }
            set { search = value; RaisePropertyChanged(); }
        }

        #endregion

        #region 重要字段定义

        private readonly ITodoService service;

        #endregion

        #region 字段定义
        private int selectIndex;
        private ToDoDto currDto;
        private bool isRightOpen;
        private ObservableCollection? todoDtos;
        private string rightContentTitle;
        private string search;



        #endregion

        #region 命令方法


        /// 
        /// 删除指定项
        /// 
        /// 
        async private void DeleteItem(ToDoDto dto)
        {
            var delres = await service.DeleteAsync(dto.Id);

            if (delres.Status)
            {
                var model = TodoDtos.FirstOrDefault(t => t.Id.Equals(dto.Id));
                TodoDtos.Remove(dto);
            }
        }


        private void ExceuteCmd(string obj)
        {
            switch (obj)
            {
                case "添加":
                    Add(); break;
                case "查询":
                    Query();break;
                case "保存":
                    Save(); break;
            }
        }


        /// 
        /// 保存消息
        /// 
        private async void Save()
        {
            try
            {
                if (string.IsNullOrWhiteSpace(CurrDto.Title) || string.IsNullOrWhiteSpace(CurrDto.Content))
                    return;

                UpdateLoding(true);

                if(CurrDto.Id>0) //编辑项
                {
                    var updateres = await service.UpdateAsync(CurrDto);
                    if (updateres.Status)
                    {
                        UpdateDataAsync();
                    }
                    else
                    {
                        MessageBox.Show("更新失败");

                    }

                }
                else
                {       
                    //添加项
                    var add_res =   await service.AddAsync(CurrDto);
                    //刷新
                    if (add_res.Status) //如果添加成功
                    {
                        TodoDtos.Add(add_res.Result);
                    }
                    else
                    {
                        MessageBox.Show("添加失败");

                    }
                       
                }
            }
            catch
            {

            }
            finally
            {
                IsRightOpen = false;
                //卸载数据加载窗体
                UpdateLoding(false);
            }
        }


        /// 
        /// 打开待办事项弹窗
        /// 
        void Add()
        {
            CurrDto = new ToDoDto();
            IsRightOpen = true;
        }

        private void Query()
        {
            GetDataAsync();
        }



        /// 
        /// 根据条件更新数据
        /// 
        async void UpdateDataAsync()
        {
            int? Status = SelectIndex == 0 ? null : SelectIndex == 2 ? 1 : 0;


            var todoResult = await service.GetAllFilterAsync(new MyToDo.Share.Parameters.TodoParameter { PageIndex = 0, PageSize = 100, Search = SearchString, Status = Status });

            if (todoResult.Status)
            {
                todoDtos.Clear();
                foreach (var item in todoResult.Result.Items)
                    todoDtos.Add(item);
            }
        }



        /// 
        /// 获取所有数据
        /// 
        async void GetDataAsync()
        {
            //调用数据加载页面
            UpdateLoding(true);

            //更新数据
            UpdateDataAsync();

            //卸载数据加载页面
            UpdateLoding(false);
        }


        /// 
        /// 弹出详细信息
        /// 
        /// 
        private async void Selected(ToDoDto obj)
        {
            var todores = await service.GetFirstOfDefaultAsync(obj.Id);
            if(todores.Status)
            {
                CurrDto = todores.Result;
                IsRightOpen = true;
                RightContentTitle = "我的待办";
            }
        }

        #endregion

        public TodoViewModel(ITodoService service,IContainerProvider provider) : base(provider)
        {
            //初始化对象
            TodoDtos = new ObservableCollection();  
            RightContentTitle = "添加血雨待办";

            //初始化命令
            SelectedCommand         = new DelegateCommand(Selected);
            OpenRightContentCmd     = new DelegateCommand(Add);
            ExecuteCommand          = new DelegateCommand(ExceuteCmd);
            DeleteCommand           = new DelegateCommand(DeleteItem);

            this.service = service;
        }



        public override void OnNavigatedTo(NavigationContext navigationContext)
        {
            base.OnNavigatedTo(navigationContext);

            GetDataAsync();
        }

    }
}

修改绑定

修改文件:"Mytodo.Views.IndexView.xaml

Background="{Binding Color}"
CornerRadius="5"
Opacity="0.9">


    

依赖注入

修改文件:Mytodo.App.xmal.cs

protected override void RegisterTypes(IContainerRegistry containerRegistry)
{

    //注册服务
    containerRegistry.GetContainer().Register(made: Parameters.Of.Type(serviceKey: "webUrl"));
    containerRegistry.GetContainer().RegisterInstance(@"Http://localhost:19007/", serviceKey: "webUrl");

    containerRegistry.Register();
    containerRegistry.Register();
    containerRegistry.Register();

    //注册对话框
    containerRegistry.RegisterForNavigation();
    containerRegistry.RegisterForNavigation();


    containerRegistry.RegisterForNavigation();
    containerRegistry.RegisterForNavigation();
    containerRegistry.RegisterForNavigation();
    containerRegistry.RegisterForNavigation();
    containerRegistry.RegisterForNavigation();
    containerRegistry.RegisterForNavigation();
    containerRegistry.RegisterForNavigation();
}

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