如何在用户控件内的 WPF 中关闭当前用户控件并打开新的用户控件

Question

我是WPF应用程序的新手，我必须开发具有用户控件的应用程序，用户控件将像页面一样工作 我在 MainWindow 中打开了用户控件，它将在单击时选择语言，然后关闭(当前(语言选择控件并打开另一个

主窗口代码

<Window x:Class="WorkForceVisitor.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:WorkForceVisitor"
mc:Ignorable="d"
Title="Work Force Pro Visitor" Icon="Images/favicon.ico" Height="800" Width="1200">
<Window.Background>
<ImageBrush ImageSource="Images/bg.png"/>
</Window.Background>
<Grid Margin="10,0,1,5" RenderTransformOrigin="0.556,0.496" Height="754" VerticalAlignment="Bottom">
<StackPanel Name="myStack"  Grid.Row="1" >
</StackPanel>
</Grid>
</Window>

主窗口.cs

private Header _Header;
private Visitor _Visitor;
private Control _currentUser;
public MainWindow()
{
InitializeComponent();
_Header = new Header();
_LanguageSelection = new LanguageSelection();
_Visitor = new Visitor();
_currentUser = _LanguageSelection;
myStack.Children.Add(_currentUser);
}

用户将单击阿拉伯语或英语 单击按钮后，我们将关闭语言选择控件 并在 StackPanel Name="myStack" 中打开访客控件 在主窗口内

语言选择

<UserControl x:Class="WorkForceVisitor.LanguageSelection"
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:WorkForceVisitor"
mc:Ignorable="d" 
d:DesignHeight="300" d:DesignWidth="300">
<Grid Margin="10,0,1,5" RenderTransformOrigin="0.556,0.496" Height="754" VerticalAlignment="Bottom">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0*"/>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Image  MouseDown="EnglishPress" Grid.Column="1" HorizontalAlignment="Right" Height="200" Margin="0,0,38,272" VerticalAlignment="Bottom" Width="290" Source="Images/english.PNG">
<Image.OpacityMask>
<ImageBrush ImageSource="Images/arabic.PNG"/>
</Image.OpacityMask>
</Image>
<Image MouseDown="AranbicPress" Grid.Column="2" Height="200" Margin="50,0,0,272" VerticalAlignment="Bottom" Source="Images/arabic.PNG" RenderTransformOrigin="0.511,0.527" HorizontalAlignment="Left" Width="285">
<Image.OpacityMask>
<ImageBrush ImageSource="Images/english.PNG"/>
</Image.OpacityMask>
</Image>
<Image Grid.Column="1" HorizontalAlignment="Right" Height="100" Margin="0,0,440,517" VerticalAlignment="Bottom" Width="294" Grid.ColumnSpan="2" Source="Images/Logo.png"/>
</Grid>
</UserControl>

语言选择.cs

static bool isEnglish = false;
private void AranbicPress(object sender, MouseButtonEventArgs e)
{
// need to close current control and show visitor control in mainWindow 
}
private void EnglishPress(object sender, MouseButtonEventArgs e)
{
// need to close current control and show visitor control in mainWindow
isEnglish = true;
}

Answer 1

我不是专业人士，但这应该有效：

主窗口.cs

public static Window Current;
private Header _Header;
private Visitor _Visitor;
private Control _currentUser;

public MainWindow()
{
Current = this;
InitializeComponent();
_Header = new Header();
_LanguageSelection = new LanguageSelection();
_Visitor = new Visitor();
_currentUser = _LanguageSelection;
myStack.Children.Add(_currentUser);
}

语言选择.cs

static bool isEnglish = false;
private void AranbicPress(object sender, MouseButtonEventArgs e)
{
MainWindow.Current.myStack.Children.Clear();               
MainWindow.Current.myStack.Children.Add(MainWindow.Current._Visitor);
}
private void EnglishPress(object sender, MouseButtonEventArgs e)
{
MainWindow.Current.myStack.Children.Clear();               
MainWindow.Current.myStack.Children.Add(MainWindow.Current._Visitor);
isEnglish = true;
}

然而：

1(我认为你不需要在网格内为一个孩子堆叠面板;

2(我认为您不需要在用户需要用户控件之前初始化它们;

3(我可能最好在主窗口中创建方法来替换控件。