备忘录功能页面完善以及优化
备忘录功能基本跟前一章节的待办事项差不多一至，就不再做过多的笔述了
一.备忘录功能完整页面源码
MemoView.xaml
<UserControl x:Class="MyToDo.Views.MemoView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:MyToDo.Views"
mc:Ignorable="d"
xmlns:md="http://materialdesigninxaml.net/winfx/xaml/themes"
xmlns:cv="clr-namespace:MyToDo.Common.Converters"
xmlns:i="http://schemas.microsoft.com/xaml/behaviors"
d:DesignHeight="450" d:DesignWidth="800">
<UserControl.Resources>
<cv:IntToVisibilityConveter x:Key="IntToVisibility"/>
</UserControl.Resources>
<md:DialogHost>
<md:DrawerHost IsRightDrawerOpen="{Binding IsRightDrawerOpen}">
<!--设计右边弹出层-->
<md:DrawerHost.RightDrawerContent>
<!--定义弹出层的内容区域-->
<DockPanel Width="300" LastChildFill="False">
<TextBox Text="{Binding CurrentDto.Title}" md:HintAssist.Hint="请输入备忘录概要" Margin="20,0" DockPanel.Dock="Top"/>
<TextBox Text="{Binding CurrentDto.Content}" md:HintAssist.Hint="请输入备忘录内容" Margin="20" MinHeight="100" DockPanel.Dock="Top"/>
<Button Command="{Binding ExecuteCommand}" CommandParameter="保存" Content="添加到备忘录" DockPanel.Dock="Top" Margin="20,0" />
</DockPanel>
</md:DrawerHost.RightDrawerContent>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="auto"/>
<RowDefinition/>
</Grid.RowDefinitions>
<StackPanel Margin="15,0,0,0" Orientation="Horizontal">
<!--设置绑定模式和更新数据源类型-->
<TextBox Text="{Binding Search,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="250" VerticalAlignment="Center" md:HintAssist.Hint="查找备忘录..." md:TextFieldAssist.HasClearButton="True">
<!--搜索框绑定回车事件-->
<TextBox.InputBindings>
<!--通过Key 绑定-->
<KeyBinding Key="Enter" Command="{Binding ExecuteCommand}" CommandParameter="查询"/>
</TextBox.InputBindings>
</TextBox>
</StackPanel>
<Button HorizontalAlignment="Right" Content="+ 添加备记录" Margin="10,5" Command="{Binding ExecuteCommand}" CommandParameter="新增" />
<!--当查不到数据时，要显示的图片。添加转换器来控制，要不要显示这个图片-->
<StackPanel Grid.Row="1" VerticalAlignment="Center" Visibility="{Binding MemoDtos.Count,Converter={StaticResource IntToVisibility}}">
<Image Source="/Images/NoData.png" Width="620" Height="220"/>
<TextBlock Margin="0,10" FontSize="18" HorizontalAlignment="Center" Text="哇哦，暂无数据"/>
</StackPanel>
<ScrollViewer Grid.Row="1" >
<ItemsControl HorizontalAlignment="Center" ItemsSource="{Binding MemoDtos}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<!--自定义内容模板-->
<ItemsControl.ItemTemplate>
<DataTemplate>
<md:TransitioningContent OpeningEffect="{md:TransitionEffect Kind=ExpandIn}">
<!--自定义内容区域-->
<Grid Width="220" MinHeight="180" MaxHeight="250" Margin="8" >
<!--行为触发器-->
<i:Interaction.Triggers>
<!--鼠标左击事件-->
<i:EventTrigger EventName="MouseLeftButtonUp">
<!--设置命令-->
<i:InvokeCommandAction
CommandParameter="{Binding}"
Command="{Binding DataContext.SelectedCommand ,RelativeSource={RelativeSource Mode=FindAncestor,AncestorType=ItemsControl}}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
<!--定义2行-->
<Grid.RowDefinitions>
<RowDefinition Height="auto"/>
<RowDefinition />
</Grid.RowDefinitions>
<!--右上角按钮-->
<md:PopupBox HorizontalAlignment="Right" Panel.ZIndex="1">
<Button Content="删除" CommandParameter="{Binding}"
Command="{Binding DataContext.DeleteCommand ,RelativeSource={RelativeSource Mode=FindAncestor,AncestorType=ItemsControl}}"/>
</md:PopupBox>
<!--整个框圆角-->
<Border CornerRadius="3" Grid.RowSpan="2" Background="#3CB371"/>
<TextBlock Text="{Binding Title}" Padding="10,5" FontWeight="Bold"/>
<TextBlock Text="{Binding Content}" Padding="10,5" Grid.Row="1"/>
<!--白色背景底色控件-->
<Canvas Grid.RowSpan="2" ClipToBounds="True">
<Border Canvas.Top="10" CornerRadius="100" Canvas.Right="-50" Width="120" Height="120" Background="#ffffff" Opacity="0.1"/>
<Border Canvas.Top="80" CornerRadius="100" Canvas.Right="-30" Width="120" Height="120" Background="#ffffff" Opacity="0.1"/>
</Canvas>
</Grid>
</md:TransitioningContent>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
</Grid>
</md:DrawerHost>
</md:DialogHost>
</UserControl>
MemoViewModel.cs
namespace MyToDo.ViewModels
{
public class MemoViewModel : NavigationViewModel
{
public MemoViewModel(IMemoService memoService, IContainerProvider provider) : base(provider)
{
MemoDtos = new ObservableCollection<MemoDto>();
ExecuteCommand = new DelegateCommand<string>(Execute);
SelectedCommand = new DelegateCommand<MemoDto>(Selected);
DeleteCommand = new DelegateCommand<MemoDto>(Delete);
this.memoService = memoService;
}
private bool isRightDrawerOpen;
/// <summary>
/// 右侧编辑窗口是否展开
/// </summary>
public bool IsRightDrawerOpen
{
get { return isRightDrawerOpen; }
set { isRightDrawerOpen = value; RaisePropertyChanged(); }
}
private MemoDto currentDto;
/// <summary>
/// 编辑选中/新增对象
/// </summary>
public MemoDto CurrentDto
{
get { return currentDto; }
set { currentDto = value; RaisePropertyChanged(); }
}
private string search;
/// <summary>
/// 用户输入的搜索条件
/// </summary>
public string Search
{
get { return search; }
set { search = value; RaisePropertyChanged(); }
}
public DelegateCommand<string> ExecuteCommand { get; private set; }
public DelegateCommand<MemoDto> SelectedCommand { get; private set; }
public DelegateCommand<MemoDto> DeleteCommand { get; private set; }
private ObservableCollection<MemoDto> memoDtos;
private readonly IMemoService memoService;
/// <summary>
/// 创建数据的动态集合
/// </summary>
public ObservableCollection<MemoDto> MemoDtos
{
get { return memoDtos; }
set { memoDtos = value; RaisePropertyChanged(); }
}
async void GetDataAsync()
{
UpdateLoading(true); //发布消息，设置加载中的窗口
var memoResult= await memoService.GetAllAsync(new Shared.Parameters.QueryParameter()
{
PageIndex = 0,
PageSize = 100,
Search= Search
});
if (memoResult.Status)
{
memoDtos.Clear();
foreach (var item in memoResult.Result.Items)
{
memoDtos.Add(item);
}
}
UpdateLoading(false); //发布消息，关闭加载中的窗口
//for (int i = 0; i < 20; i++)
//{
// memoDtos.Add(new MemoDto()
// {
// Title = "标题" + i,
// Content = "测试数据..."
// });
//}
}
/// <summary>
/// 添加备忘录
/// </summary>
/// <exception cref="NotImplementedException"></exception>
private void Add()
{
CurrentDto = new MemoDto();//添加时，初始化一个新对象
IsRightDrawerOpen = true;
}
private async void Save()
{
//判断数据是否为空
if (string.IsNullOrWhiteSpace(CurrentDto.Title) || string.IsNullOrWhiteSpace(CurrentDto.Content)) return;
UpdateLoading(true);
try
{
if (CurrentDto.Id > 0) //Id 大于0，表示编辑。否则新增
{
var updateResult = await memoService.UpdateAsync(CurrentDto);
if (updateResult.Status) //更新成功
{
//查找到当前界面更新的那个条数据，把显示的内容进行更新
var todo = memoDtos.FirstOrDefault(t => t.Id == CurrentDto.Id);
if (todo != null)
{
todo.Title = CurrentDto.Title;
todo.Content = CurrentDto.Content;
}
IsRightDrawerOpen = false; //关闭编辑窗口
}
}
else
{
var addResult = await memoService.AddAsync(CurrentDto);
if (addResult.Status)
{
if (addResult.Result != null)
{
memoDtos.Add(addResult.Result); //把数据添加到界面的集合中
IsRightDrawerOpen = false; //关闭新增窗口
}
}
}
}
catch (Exception ex)
{
await Console.Out.WriteLineAsync(ex.Message);
}
finally
{
UpdateLoading(false);
}
}
private async void Delete(MemoDto dto)
{
try
{
UpdateLoading(true); //发布消息，设置加载中的窗口
var deleteResult = await memoService.DeleteAsync(dto.Id);
if (deleteResult.Status)
{
//在当前数据集合中，找到当前已经删除掉的数据，并移除掉
var model = memoDtos.FirstOrDefault(t => t.Id.Equals(dto.Id));
if (model != null) memoDtos.Remove(model);
}
}
catch (Exception ex)
{
await Console.Out.WriteLineAsync(ex.Message);
}
finally
{
UpdateLoading(false); //发布消息，关闭加载中的窗口
}
}
/// <summary>
/// 根据不同的参数，处理不同的逻辑
/// </summary>
/// <param name="obj"></param>
private void Execute(string obj)
{
switch (obj)
{
case "新增":
Add();
break;
case "查询":
GetDataAsync();
break;
case "保存":
Save();
break;
}
}
private async void Selected(MemoDto obj)
{
try
{
UpdateLoading(true);
//进行数据查询
var todoResult = await memoService.GetFirstOfDefaultAsync(obj.Id);
if (todoResult.Status)
{
//把拿到的结果，赋给一个当前选中的ToDoDto
CurrentDto = todoResult.Result;
IsRightDrawerOpen = true;//打开窗口
}
}
catch (Exception ex)
{
await Console.Out.WriteLineAsync(ex.Message);
}
finally
{
UpdateLoading(false);
}
}
//重写导航加载数据的方法
public override void OnNavigatedTo(NavigationContext navigationContext)
{
base.OnNavigatedTo(navigationContext);
GetDataAsync();
}
}
}二.错误排查
如果有出现相关的错误，例如，查询异常或其他其他。直接参考上一章节的错误排查就好了。
