关闭在 MainWindow WPF 中创建的第二个窗口

Question

我正在创建一个地址簿应用程序。 我目前有 MainWindow.xaml：

<Window x:Class="AddressBook.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:AddressBook"
    mc:Ignorable="d"
    Title="MainWindow" Height="450" Width="800">
<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="20"/>
        <ColumnDefinition Width="auto"/>
        <ColumnDefinition Width="auto"/>
        <ColumnDefinition Width="auto"/>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="20"/>
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition Height="20"/>
        <RowDefinition Height="*"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="*"/>
        <RowDefinition Height="20"/>
    </Grid.RowDefinitions>

    <Button Width="100" Height="50" Grid.Column="2" Grid.Row="2" Margin="0 0 0 50" Click="Button_Click">New Contact</Button>
    <Button Width="100" Height="50" Grid.Column="2" Grid.Row="3" Margin="0 0 0 50">Edit Contact</Button>
    <Button Width="100" Height="50" Grid.Column="2" Grid.Row="4" Margin="0 0 0 50">Delete Contact</Button>

    <ListView Margin="10" Name="lvContacts" Grid.Column="3" Grid.ColumnSpan="4" Grid.Row="1" Grid.RowSpan="4" >
        <ListView.Resources>
            <Style TargetType="{x:Type GridViewColumnHeader}">
                <Setter Property="HorizontalContentAlignment" Value="Left"/>
            </Style>
        </ListView.Resources>
        <ListView.View>
            <GridView>
                <GridViewColumn Header="Name" Width="120" DisplayMemberBinding="{Binding Name}" ></GridViewColumn>
                <GridViewColumn Header="Age" Width="50" DisplayMemberBinding="{Binding Age}" ></GridViewColumn>
                <GridViewColumn Header="Mail" Width="150" DisplayMemberBinding="{Binding Mail}" ></GridViewColumn>
            </GridView>
        </ListView.View>
    </ListView>
</Grid>

主窗口.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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;

namespace AddressBook
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        NewContact newContact;
        public MainWindow()
        {
            InitializeComponent();
            List<Contact> items = new List<Contact>();
            items.Add(new Contact() { Name = "John Doe", Age = 42, Mail = "john@doe-family.com" });
            items.Add(new Contact() { Name = "Jane Doe", Age = 39, Mail = "jane@doe-family.com" });
            items.Add(new Contact() { Name = "Sammy Doe", Age = 7, Mail = "sammy.doe@gmail.com" });
            lvContacts.ItemsSource = items;
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            newContact = new NewContact();
            newContact.Show();
        }        
    }

    public class Contact
    {
        public string Name { get; set; }
        public int Age { get; set; }
        public string Mail { get; set; }
    }
}

当用户单击“新建联系人”按钮时，它会创建一个名为“NewContact.xaml”的第二个窗口

<Window x:Class="AddressBook.NewContact"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:AddressBook"
    mc:Ignorable="d"
    Title="NewContact" Height="348.322" Width="516.107">
<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="40"/>
        <ColumnDefinition Width="200"/>
        <ColumnDefinition Width="20"/>
        <ColumnDefinition Width="200"/>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="40"/>
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition Height="20"/>           
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="*"/>
        <RowDefinition Height="20"/>
    </Grid.RowDefinitions>

    <!--Title Label Column-1 Row-1 -->
    <Label Grid.Column="1" Grid.ColumnSpan="4" Grid.Row="1" HorizontalAlignment="Center" FontSize="24" FontWeight="Black">New Contact</Label>

    <!--First Name-->
    <Label Grid.Column="1" Grid.Row="2">First Name</Label>       
    <TextBox Grid.Column="1" Grid.Row="3" ></TextBox>

    <!--Last Name-->
    <Label Grid.Column="3" Grid.Row="2">Last Name</Label>
    <TextBox Grid.Column="3" Grid.Row="3"></TextBox>

    <!--Address-->
    <Label Grid.Column="1" Grid.Row="4">Address</Label>
    <TextBox Grid.Column="1" Grid.ColumnSpan="3" Grid.Row="5"></TextBox>

    <!--Email-->
    <Label Grid.Column="1" Grid.Row="6">Email</Label>
    <TextBox Grid.Column="1" Grid.ColumnSpan="3" Grid.Row="7"></TextBox>

    <!--Phone Number-->
    <Label Grid.Column="1" Grid.Row="8">Phone Number</Label>
    <TextBox Grid.Column="1" Grid.Row="9"></TextBox>

    <Button x:Name="Submit_Button" Grid.Column="1" Grid.Row="10" Width="75" Height="25" Margin="0 20 0 20">Submit</Button>
    <Button x:Name="Cancel_Button" Grid.Column="3" Grid.Row="10" Width="75" Height="25" Margin="0 20 0 20" Click="Cancel_Button_Click">Cancel</Button>


</Grid>

我希望用户在单击 Cancel_Button 时能够关闭 NewContact 窗口。

我的第一个想法是执行以下操作，但我不知道如何正确实施它，而且我知道我遗漏了一些东西或者不明白它应该如何工作并且需要一些指导。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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.Shapes;

namespace AddressBook
{
    /// <summary>
    /// Interaction logic for NewContact.xaml
    /// </summary>
    public partial class NewContact : Window
    {
        public NewContact()
        {
            InitializeComponent();
        }

        private void Cancel_Button_Click(object sender, RoutedEventArgs e)
        {
            NewContact NewContact = new NewContact();
            NewContact.Close();
        }
    }
}

任何帮助表示赞赏！

Answer 1

您可以使用 Window Close 方法来关闭它，这会手动关闭一个窗口。 所以在按钮的“Cancel_Button_Click”中你可以只使用“Close();” 而不是创建它自己的类的新实例并关闭它。

Answer 2

想通了，这是一个简单的解决方案。

private void Cancel_Button_Click(object sender, RoutedEventArgs e)
    {            
        Close();
    }

我想多了这个问题。