在 UWP 应用程序中模拟 Keyup 和 keydown 等键盘事件

Question

How to simulate keyboard events like Keyup and keydown in UWP app.I do not want to use manual keyboard instead i have made my own keyboard but i want to add now keyboard events in it. I did not find any way in uwp and SendKeys.Send() method is also not available for UWP.

Answer 1

You can use Input Injection . The documentation has a complicated example, but it basically breaks down into declaring a capability and writing something like the following code:

        _inputInjector = InputInjector.TryCreate();
        var input = new InjectedInputKeyboardInfo();
        input.VirtualKey = value;
        input.KeyOptions = InjectedInputKeyOptions.None;
        _inputInjector.InjectKeyboardInput(new[] { input });

Where value is either a VirtualKey or a char that can be cast to one. More details in the following answer .

Answer 2

I do not want to use manual keyboard instead i have made my own keyboard but i want to add now keyboard events in it. I did not find any way in uwp and SendKeys.Send() method is also not available for UWP.

For your requirement, you could create custom event handler to simulate keyboard KeyDown , KeyUp event in your custom User Control. The key point is when to invoke your custom event handler. I have create a sample simple you could have a reference.

CustomKeyBoard.xaml

<UserControl
    x:Class="UIKeyBoardTest.CustomKeyBoard"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:UIKeyBoardTest"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:control ="using:Microsoft.Toolkit.Uwp.UI.Controls"
    mc:Ignorable="d"
    d:DesignHeight="300"
    d:DesignWidth="400">
    <Grid>
        <GridView  VerticalAlignment="Center" HorizontalAlignment="Center" ItemClick="GridView_ItemClick"  IsItemClickEnabled="True">
            <GridView.ItemsPanel>
                <ItemsPanelTemplate>
                    <VariableSizedWrapGrid  MaximumRowsOrColumns="3" Orientation="Horizontal" />
                </ItemsPanelTemplate>
            </GridView.ItemsPanel>
            <GridView.ItemTemplate>
                <DataTemplate>
                    <StackPanel Background="White"
                BorderBrush="Black"
                BorderThickness="1">
                        <TextBlock Text="{Binding }" HorizontalAlignment="Center" TextAlignment="Center" VerticalAlignment="Center" FontSize="40"  Width="55" />
                    </StackPanel>
                </DataTemplate>
            </GridView.ItemTemplate>
            <x:String>1</x:String>
            <x:String>2</x:String>
            <x:String>3</x:String>
            <x:String>4</x:String>
            <x:String>5</x:String>
            <x:String>6</x:String>
            <x:String>7</x:String>
            <x:String>8</x:String>
            <x:String>9</x:String>
        </GridView>
    </Grid>
</UserControl>

CustomKeyBoard.xaml.cs

public sealed partial class CustomKeyBoard : UserControl
{
    public delegate void BoilerLogHandler(string value);

    public event BoilerLogHandler BoilerEventLog;

    public CustomKeyBoard()
    {
        this.InitializeComponent();
    }

    private void GridView_ItemClick(object sender, ItemClickEventArgs e)
    {
        if (BoilerEventLog != null)
        {
            BoilerEventLog(e.ClickedItem.ToString());
        }
    }
}

Usage

 <TextBox x:Name="box" PlaceholderText="Please input something" Margin="0,50,0,60" />
<local:CustomKeyBoard
    HorizontalAlignment="Center"
    VerticalAlignment="Center"
    BoilerEventLog="CustomKeyBoard_BoilerEventLog" />

private void CustomKeyBoard_BoilerEventLog(string value)
{
    box.Text = value;
}