在这一部分里，我将讲解如何编写一个应用程序以及访问Windows Phone中文本框的值。

首先从编写应用程序说起。

编写第一个应用程序

从File菜单选择New project，并选择Windows Phone applicaton。将三个文本框添加到网格面板，前两个文本框用于输入数值，第三个文本框显示结果。

MainPage.xaml 

    
<!--LayoutRoot is the root grid where all page content is placed-->  
<Grid x:Name="LayoutRoot" Background="Transparent">  
    <Grid.RowDefinitions>  
        <RowDefinition Height="Auto"/>  
        <RowDefinition Height="*"/>  
    </Grid.RowDefinitions>  
    <!--TitlePanel contains the name of the application and page title-->  
    <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">  
        <TextBlock x:Name="ApplicationTitle" Text="MY APPLICATION" Style="{StaticResource PhoneTextNormalStyle}"/>  
        <TextBlock x:Name="PageTitle" Text="1st Application" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>  
    </StackPanel>  
    <!--ContentPanel - place additional content here-->  
    <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">  
        <TextBlock x:Name="lblfirst" Text="Enter 1st Number" Margin="25,38,241,527"></TextBlock>  
        <TextBlock x:Name="lblsecond" Text="Enter 2nd Number" Margin="25,98,241,467"></TextBlock>  
        <TextBlock x:Name="lblresult" Text="Result" Margin="25,161,241,404"></TextBlock>  
        <TextBox x:Name="txtfirst" Margin="225,24,6,508"></TextBox>  
        <TextBox x:Name="txtsecond" Margin="225,84,6,450"></TextBox>  
        <TextBox x:Name="txtresult"  Margin="225,147,6,381"></TextBox>  
        <Button x:Name="btnadd" Height="95" Content="Addition" Margin="0,232,0,280" Click="btnadd_Click"></Button>  
    </Grid>  
</Grid>

现在为按钮的点击事件编写代码，第一个和第二个文本框接收用户输入的数据，第三个文本框显示两个数字相加的结果。

MainPage.xaml.cs

using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Net;  
using System.Windows;  
using System.Windows.Controls;  
using System.Windows.Documents;  
using System.Windows.Input;  
using System.Windows.Media;  
using System.Windows.Media.Animation;  
using System.Windows.Shapes;  
using Microsoft.Phone.Controls;  
  
namespace WriteFirstApplication  
{  
    public partial class MainPage : PhoneApplicationPage  
    {  
        // Constructor  
        public MainPage()  
        {  
            InitializeComponent();  
        }  
  
        private void btnadd_Click(object sender, RoutedEventArgs e)  
        {  
             
            int result = Convert.ToInt32(txtfirst.Text)+Convert.ToInt32(txtsecond.Text);  
            txtresult.Text = result.ToString();  
  
              
        }  
    }  
}  

所有完成之后运行应用程序。

现在编写显示运行消息的信息提示框。你只需要添加一行代码就可以完成信息提示框的设计。

MessageBox.Show(“YourContent”)

MainPage.xaml.cs

using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Net;  
using System.Windows;  
using System.Windows.Controls;  
using System.Windows.Documents;  
using System.Windows.Input;  
using System.Windows.Media;  
using System.Windows.Media.Animation;  
using System.Windows.Shapes;  
using Microsoft.Phone.Controls;  
  
namespace WriteFirstApplication  
{  
    public partial class MainPage : PhoneApplicationPage  
    {  
        // Constructor  
        public MainPage()  
        {  
            InitializeComponent();  
        }  
  
        private void btnadd_Click(object sender, RoutedEventArgs e)  
        {  
             
            int result = Convert.ToInt32(txtfirst.Text)+Convert.ToInt32(txtsecond.Text);  
MessageBox.Show("Addition of "+ txtfirst.Text +"&"+ txtsecond.Text +"=" +result.ToString());  
  
  
             
        }  
    }  
}  

本文翻译自c-sharpcorner.com