MVVM Light导航服务-更改MainWindow标题和大小 [英] MVVM Light Navigation Service - Change MainWindow Title and Size

问题描述

我正在使用(我的第一个WPF应用程序)创建一个新的WPF应用程序:

I'm creating a new WPF application with (my first WPF app):

• .Net 4.0
• MVVM灯
• C#
• MahApps Metro

我已经使用MVVM Light中的导航服务"实现了导航.我正在使用MainWindow和Pages来完成相同的任务.

I've already implemented navigation using the Navigation Service in MVVM Light. I'm using a MainWindow and Pages in order to accomplish the same.

在MainWindow.xaml中，有一个MainFrame正在更改当前视图:

In my MainWindow.xaml I have a MainFrame that is changing my current View:

<Controls:MetroWindow x:Class="App.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
        xmlns:resx="clr-namespace:MaverickDesktop.Resources"
        Title="My title" 
        Height="280" 
        Width="500">
    <Window.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Blue.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseLight.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Window.Resources>

    <Frame Source="\Views\LoginView.xaml" NavigationUIVisibility="Hidden" Name="MainFrame"></Frame>

</Controls:MetroWindow>

这是我的LoginView.xaml页面:

This is my LoginView.xaml Page:

<Page x:Class="App.Views.LoginView"
      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:Dialog="clr-namespace:MahApps.Metro.Controls.Dialogs;assembly=MahApps.Metro"
      Dialog:DialogParticipation.Register="{Binding}"
      mc:Ignorable="d"
      xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro" 
      xmlns:resx="clr-namespace:MaverickDesktop.Resources"
      Height="500" 
      Width="700"
      xmlns:iconPacks="http://metro.mahapps.com/winfx/xaml/iconpacks"
      DataContext="{Binding Main, Source={StaticResource Locator}}"
      >

    <Grid Margin="0,0,0,10">
        <Label Content="User:" HorizontalAlignment="Left" Margin="24,37,0,0" VerticalAlignment="Top" FontSize="24"/>
        <Label Content="Password:" HorizontalAlignment="Left" Margin="24,96,0,0" VerticalAlignment="Top" FontSize="24"/>
        <TextBox HorizontalAlignment="Left" Height="42" Margin="172,37,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="274" Name="txtUser" FontSize="24" Controls:TextBoxHelper.ClearTextButton="True" Text="{Binding personnel.personnel_key, Mode=TwoWay}"/>
        <PasswordBox HorizontalAlignment="Left" Height="42" Margin="172,96,0,0" VerticalAlignment="Top" Width="274" Name="txtPassword" FontSize="24" Controls:TextBoxHelper.ClearTextButton="True" PasswordChar="*" PasswordChanged="txtPassword_PasswordChanged"/>
        <Button Content="Ingresar" HorizontalAlignment="Left" IsDefault="True" Margin="172,169,0,-22" VerticalAlignment="Top" Width="274" Height="44" FontSize="24" Name="btnLogin" Style="{StaticResource AccentedSquareButtonStyle}" Command="{Binding btn_login_click}"/>
    </Grid>
</Page>

问题:

• 如何根据当前视图更改窗口的标题和大小?有可能吗?

推荐答案

首先，您必须了解MainWindow中的绑定，标题等概念都是硬编码的值.

Well first, you have to undersand the idea of bindings, your title,etc in MainWindow are hardcoded values.

现在我能找到的最简单的方法是拥有一个模型，例如

Now the simplest way i can find is to have a model, example

public class ViewPayload{
    public string Title{get;set;}
    //more properties here
}

然后在您的MainWindow上，需要要更改的属性

On your MainWindow you then want properties for what you want to change

public class MainWindow : MetroWindow{
public string Title{get;set;}
// more properties here
}

现在这里很有趣，您可以像这样创建pub子事件

Now heres where it gets fun, you can crete a pub sub event like so

private readonly IEventAggregator _eventAggregator = new EventAggregator();
_eventAggregator.GetEvent<ViewPayload>().Subscribe(ChangePropertiesFromModel);

然后，当您只想发布时，

And then when you want to publishe simply do,

_eventAggregator.GetEvent<ViewPayload>().Publish(PublisPayloadMethod());

并将窗口内容更改为绑定，因此

and change the window content to binding, so

Title="{binding TitleProperty}"

这篇关于MVVM Light导航服务-更改MainWindow标题和大小的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！