c# - 命名空间“System.Windows.Input”中不存在 KeyPressEventArgs（您是否缺少程序集引用？） Windows Phone 2012 SDK C#

Question

我的编码有一个错误，它真的开始变得困难了

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using Business_Card.Resources;
using Windows;
using Microsoft;


namespace Business_Card
{
    public partial class MainPage : PhoneApplicationPage
    {
        // Constructor
        public MainPage()
        {
            InitializeComponent();

            // Sample code to localize the ApplicationBar
            //BuildLocalizedApplicationBar();
        }

        private void TextBox_TextChanged_1(object sender, TextChangedEventArgs e)
        {

        }

        private void TextBox_KeyPress(object sender, System.Windows.Input.KeyPressEventArgs e)    
        {

            string[] nums = { "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-" };

            if (!nums.Contains(e.KeyChar.ToString()))

                e.Handled = true;

        }
    }
}

那是全班

但这是有错误的部分

    private void TextBox_KeyPress(object sender, System.Windows.Input.KeyPressEventArgs e)    
    {

        string[] nums = { "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-" };

        if (!nums.Contains(e.KeyChar.ToString()))

            e.Handled = true;

    }

具体线路

private void TextBox_KeyPress(object sender, System.Windows.Input.KeyPressEventArgs e)    

它说System.Windows.Input.KeyPressEventArgs的部分告诉我在System.Windows.Input中找不到命名空间或名称

我也尝试过使用 System.Windows.Forms；它说也没有找到表格，我确实去了参考资料，但在那里没有找到。

Answer 1

尝试KeyDown事件。

private void textBox_KeyDown(object sender, KeyEventArgs e)
{

     string[] nums = { "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-" };
     if (!nums.Contains(e.Key.ToString()))
     e.Handled = true;
}