小编Jer*_*ker的帖子

我正在学习WPF WebView控件，我有以下MainWindow.xaml文件：

<Window x:Class="MyWPF.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:MyWPF"
        xmlns:WPF="clr-namespace:Microsoft.Toolkit.Wpf.UI.Controls;assembly=Microsoft.Toolkit.Wpf.UI.Controls.WebView"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid x:Name="Grid1" Grid.Row="1" Grid.Column="1">
        <WPF:WebView x:Name="webView1"
                      Grid.Row="0"
                      Grid.Column="0"
                      Loaded="WebView_Loaded" />
    </Grid>
</Window>

以及下面的相应MainWindow.xaml.cs文件：

namespace MyWPF
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            webView1.Navigate(new Uri("https://www.google.com"));
        }

        private void WebView_Loaded(object sender, RoutedEventArgs e)
        {
        }
    }
}

但我没有收到任何预期的弹出窗口。如果我删除

webView1.Navigate(new Uri(" https://www.google.com "));

我可以得到一个空白的弹出窗口。我的代码有什么问题以及如何解决？

更新1

我添加了Window_Loaded事件处理程序并在其中移动了以下两个事件处理程序，现在我可以看到一个空白的弹出窗口，但没有任何内容和消息框。

Uri uri = new Uri("https://www.google.com");
WebView1.Navigate(uri);

整个更新的代码隐藏：

namespace MyWPF
{
    /// <summary> …

I want to implement margin-right inline CSS to the below react span element:

import React, { Component } from "react";   
class NavBar extends Component {
  state = {
    totalCounters: 0,
  };      
  render() {    
    let styles = {
        margin-right: '20px',
        width: '250px',
        height: '250px',
        backgroundColor: 'yellow',
      };
    return (
      <nav className="navbar navbar-light bg-light">
        <a className="navbar-brand" href="#">
          Navbar
        </a>
        <span style={styles} className="badge badge-pill badge-secondary">
          {this.props.totalCounters}
        </span>
      </nav>
    );
  }
}
export default NavBar;

But it shows syntax error, while no error if …

我正在学习 UWP 用户控制并面临以下代码：

<Page
    x:Class="LearningUWP.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:LearningUWP"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

    <StackPanel>
        <local:MyUserControl Username="aaa" Password="bbb" fillcolor="Blue" />
    </StackPanel>
</Page>

我定义了一个具有三个依赖属性的用户控件：用户名、密码和填充颜色。下面的代码显示了我的用户控件 xaml

<UserControl
    x:Name="myctrl"
    x:Class="LearningUWP.MyUserControl"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:LearningUWP"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    >
    <RelativePanel>
        <Rectangle Fill="{Binding fillcolor, ElementName=myctrl}"  x:Name="Rec" Height="100"   RelativePanel.AlignRightWithPanel="True" />
        <TextBlock Text="Username_lbl" RelativePanel.AlignRightWithPanel="True" TextAlignment="Center" RelativePanel.Below="Rec" x:Name="Username_lb" Margin="0,50,0,0" RelativePanel.AlignLeftWithPanel="True" />
        <TextBox x:Name="Username_input" RelativePanel.Below="Username_lb" RelativePanel.AlignRightWithPanel="True" RelativePanel.AlignLeftWithPanel="True" Margin="0,20,0,0" Text="{Binding Username, ElementName=myctrl}"  ></TextBox>
        <TextBlock Text="Password_lbl" x:Name="Password_lb" RelativePanel.AlignRightWithPanel="True" TextAlignment="Center" RelativePanel.Below="Username_input" RelativePanel.AlignLeftWithPanel="True" Margin="0,20,0,0" ></TextBlock>
        <TextBox x:Name="Password_input" RelativePanel.Below="Password_lb" RelativePanel.AlignRightWithPanel="True" RelativePanel.AlignLeftWithPanel="True" Margin="0,20,0,0" Text="{Binding Password, ElementName=myctrl}" ></TextBox> …