Question

我有一个应用程序，我编写了自己的导航窗口（由于各种原因），内容托管在边框内。当我换掉内容时，我需要一种机制，一旦内容被渲染就通知我，所以我可以自动调整整个窗口的大小。

我需要一种将窗口大小调整为内容或给出最大大小的行为。自动调整大小后，用户应以任何方式调整窗口大小。

我正在使用：

this.MaxHeight = 700;
this.MaxWidth = 800;
this.SizeToContent = System.Windows.SizeToContent.WidthAndHeight;
this.SizeToContent = System.Windows.SizeToContent.Manual;
this.MaxWidth = double.PositiveInfinity;
this.MaxHeight = double.PositiveInfinity;

但由于渲染并不总是完成，所以这不会一直有效。

编辑：我写了这个示例，表明渲染的内容只被触发一次：

<Window x:Class="WpfApplication2.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow"
        Width="525"
        Height="350"
        ContentRendered="Window_ContentRendered">
    <StackPanel>
        <Border x:Name="border"
                Width="200"
                Height="200"
                BorderBrush="Cornsilk"
                BorderThickness="1">
            <Ellipse Width="40"
                     Height="20"
                     Fill="AliceBlue"
                     Stroke="Black" />
        </Border>
        <Button x:Name="btn"
                Click="btn_Click"
                Content="ClickMe" />
        <TextBlock x:Name="txtRender" />
    </StackPanel>
</Window>

代码背后：

using System;
using System.Windows;
using System.Windows.Media;
using System.Windows.Shapes;

namespace WpfApplication2
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        int rendercount = 0;
        Random rnd = new Random();

        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_ContentRendered(object sender, EventArgs e)
        {
            rendercount++;
            txtRender.Text = rendercount.ToString();
        }

        private void btn_Click(object sender, RoutedEventArgs e)
        {
            Ellipse ell = new Ellipse();
            ell.Width = rnd.Next(50, 100);
            ell.Height = rnd.Next(10, 100);
            ell.Stroke = Brushes.Black;
            ell.StrokeThickness = 2;
            border.Child = ell;
        }
    }
}

Answer 1

只需删除边框上的尺寸，然后仅在this.SizeToContent = System.Windows.SizeToContent.WidthAndHeight;

之后设置InitializeComponent();

工作XAML：

<Window x:Class="WpfApplication2.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525"
        ContentRendered="Window_ContentRendered">
    <StackPanel>
        <Border x:Name="border"
                BorderBrush="Cornsilk"
                BorderThickness="1">
            <Ellipse Width="40"
                     Height="20"
                     Fill="AliceBlue"
                     Stroke="Black" />
        </Border>
        <Button x:Name="btn"
                Click="btn_Click"
                Content="ClickMe" />
        <TextBlock x:Name="txtRender" />
    </StackPanel>
</Window>

背后的代码

public partial class MainWindow : Window
{
    int rendercount = 0;
    Random rnd = new Random();

    public MainWindow()
    {
        InitializeComponent();

        this.SizeToContent = System.Windows.SizeToContent.WidthAndHeight;
    }

    private void Window_ContentRendered(object sender, EventArgs e)
    {
        rendercount++;
        txtRender.Text = rendercount.ToString();
    }

    private void btn_Click(object sender, RoutedEventArgs e)
    {
        Ellipse ell = new Ellipse();
        ell.Width = rnd.Next(50, 100);
        ell.Height = rnd.Next(10, 100);
        ell.Stroke = Brushes.Black;
        ell.StrokeThickness = 2;
        border.Child = ell;
    }
}

边框内容更改时自动调整大小

1 个答案: