用wpf做一个数字键盘

可以使用WPF中的Button控件来实现数字键盘。以下是一个简单的示例：

首先，在你的WPF窗体中添加一个Grid控件，然后将8个Button控件放在Grid控件中，每个Button控件显示一个数字。示例代码如下：

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition />
        <RowDefinition />
        <RowDefinition />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition />
        <ColumnDefinition />
        <ColumnDefinition />
    </Grid.ColumnDefinitions>
    <Button Content="1" Grid.Row="0" Grid.Column="0" />
    <Button Content="2" Grid.Row="0" Grid.Column="1" />
    <Button Content="3" Grid.Row="0" Grid.Column="2" />
    <Button Content="4" Grid.Row="1" Grid.Column="0" />
    <Button Content="5" Grid.Row="1" Grid.Column="1" />
    <Button Content="6" Grid.Row="1" Grid.Column="2" />
    <Button Content="7" Grid.Row="2" Grid.Column="0" />
    <Button Content="8" Grid.Row="2" Grid.Column="1" />
    <Button Content="9" Grid.Row="2" Grid.Column="2" />
</Grid>

然后，你可以为每个Button控件的Click事件添加一个事件处理程序，以便在用户单击数字键时执行相应的操作。例如，你可以将数字键的值添加到TextBox控件中。示例代码如下：

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition />
        <RowDefinition />
        <RowDefinition />
        <RowDefinition />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition />
        <ColumnDefinition />
        <ColumnDefinition />
    </Grid.ColumnDefinitions>
    <TextBox x:Name="NumberTextBox" Grid.Row="0" Grid.ColumnSpan="3" />
    <Button Content="1" Grid.Row="1" Grid.Column="0" Click="NumberButton_Click" />
    <Button Content="2" Grid.Row="1" Grid.Column="1" Click="NumberButton_Click" />
    <Button Content="3" Grid.Row="1" Grid.Column="2" Click="NumberButton_Click" />
    <Button Content="4" Grid.Row="2" Grid.Column="0" Click="NumberButton_Click" />
    <Button Content="5" Grid.Row="2" Grid.Column="1" Click="NumberButton_Click" />
    <Button Content="6" Grid.Row="2" Grid.Column="2" Click="NumberButton_Click" />
    <Button Content="7" Grid.Row="3" Grid.Column="0" Click="NumberButton_Click" />
    <Button Content="8" Grid.Row="3" Grid.Column="1" Click="NumberButton_Click" />
    <Button Content="9" Grid.Row="3" Grid.Column="2" Click="NumberButton_Click" />
</Grid>

在代码中，你需要实现NumberButton_Click事件处理程序，该程序将数字键的值添加到TextBox控件中。示例代码如下：

private void NumberButton_Click(object sender, RoutedEventArgs e)
{
    Button button = (Button)sender;
    NumberTextBox.Text += button.Content.ToString();
}

这样，你就可以创建一个简单的数字键盘，允许用户输入数字。