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 

<!--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

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,原文地址