Windows Phone新手开发教程（四）

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 

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<!--LayoutRoot is the root grid where all page content is placed-->  <grid x:name="LayoutRoot" background="Transparent">      <grid.rowdefinitions>          <rowdefinition height="Auto">          <rowdefinition height="*">      </rowdefinition></rowdefinition></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}">      </textblock></textblock></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

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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

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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,原文地址