在WPF中自动注销后恢复上一个会话
本文关键字:恢复 上一个 会话 注销 WPF | 更新日期: 2023-09-27 17:50:49
我想在我的WPF应用程序中实现这一功能,就像有人已经登录并正在填写注册表一样,但过了一段时间,帐户就会自动注销(已经实现了这一功能(,然后当用户再次登录时,如何在相同的旧状态下向他显示应用程序,即填写了一半的表格或他以前用帐户做的任何事情,我在网上找,但找不到任何帮助。
没有简单快捷的方法。。。然而,我会这样做。
使用MVVM模式。当用户在视图中输入信息时,ViewModel将获得数据。当用户注销时,应用程序应该将ViewModel序列化为您喜欢的格式。我的是JSON。使用JSON.NET,您可以将视图模型序列化为文件。
启动时,您将反序列化文件并恢复视图模型。瞧,你的视野应该回到他们关闭应用程序时的样子。
I have made it-
MainWindow.xaml
<Window x:Class="SerializeDeSerialize.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:Nikita="clr-namespace:SerializeDeSerialize"
Title="MainWindow" Height="350" Width="525" Closed="Window_Closed_1" Loaded="Window_Loaded_1">
<Window.DataContext>
<Nikita:Movie></Nikita:Movie>
</Window.DataContext>
<Grid>
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<Label Name="lblTitle" Content="Title:" Grid.Row="0" Grid.Column="0" Margin="10,25,63,10" HorizontalAlignment="Left" Width="164"></Label>
<TextBox Grid.Row="0" Name="txtTitle" Grid.Column="1" Margin="10,25,63,10" Text="{Binding Title}"></TextBox>
<Label Grid.Row="1" Name="lblRating" Content="Rating:" Grid.Column="0" Margin="10,25,63,10" HorizontalAlignment="Left" Width="164"></Label>
<TextBox Grid.Row="1" Name="txtRating" Grid.Column="1" Margin="10,25,63,10" Text="{Binding Rating}"></TextBox>
<Label Grid.Row="2" Name="lblReleaseDate" Content="Release Date:" Grid.Column="0" Margin="10,25,63,10" HorizontalAlignment="Left" Width="164"></Label>
<TextBox Grid.Row="2" Name="txtReleaseDate" Grid.Column="1" Margin="10,25,63,10" Text="{Binding ReleaseDate}"></TextBox>
<Button Grid.Row="3" Content="Window1" Margin="66,36,69,10" Click="Button_Click_1"></Button>
<Button Grid.Row="4" Content="Window2" Margin="66,36,69,10" Click="Button_Click_2"></Button>
</Grid>
</Window>
MainWindow.xaml.cs
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Xml.Serialization;
namespace SerializeDeSerialize
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
SerializeDeSerialize.Movie mv = new Movie();
static Movie mm = new Movie();
public MainWindow()
{
InitializeComponent();
DataContext = mv;
}
private void Window_Closed_1(object sender, EventArgs e)
{
SerializeToXML(mv);
}
static public void SerializeToXML(Movie movie)
{
XmlSerializer serializer = new XmlSerializer(typeof(Movie));
TextWriter textWriter = new StreamWriter(@"C:'Users'398780'Desktop'Nikita'movie.xml");
serializer.Serialize(textWriter, movie);
textWriter.Close();
}
private void Window_Loaded_1(object sender, RoutedEventArgs e)
{
mm=DeserializeFromXML();
txtTitle.Text = mm.Title;
txtRating.Text =Convert.ToString(mm.Rating);
txtReleaseDate.Text = Convert.ToString(mm.ReleaseDate);
}
static Movie DeserializeFromXML()
{
XmlSerializer deserializer = new XmlSerializer(typeof(Movie));
TextReader textReader = new StreamReader(@"C:'Users'398780'Desktop'Nikita'movie.xml");
mm=(Movie)deserializer.Deserialize(textReader);
textReader.Close();
return mm;
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
Window1 win1 = new Window1();
win1.Show();
}
private void Button_Click_2(object sender, RoutedEventArgs e)
{
Window2 win2 = new Window2();
win2.Show();
}
}
}
MVVM-movie.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace SerializeDeSerialize
{
public class Movie
{
private string _title;
private int _rating;
private DateTime _releaseDate;
public Movie()
{
}
public string Title
{
get { return _title; }
set { _title = value; }
}
public int Rating
{
get { return _rating; }
set { _rating = value; }
}
public DateTime ReleaseDate
{
get { return _releaseDate; }
set { _releaseDate = value; }
}
}
}
Please check..it is same as you told or not?