WPF 学习笔记（十一）

（1）子窗口界面设置

<Window x:Class="WpfApplication1.InputWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="输入窗口" Height="101" Width="294" ResizeMode="NoResize" WindowStartupLocation="CenterScreen">
    <Grid>
        <Button Content="确定" Height="23" HorizontalAlignment="Right" Margin="0,35,8,0" Name="btnOk" VerticalAlignment="Top" Width="75" Click="btnOk_Click" />
        <Button Content="取消" Height="23" HorizontalAlignment="Left" Margin="114,35,0,0" Name="btnCancel" VerticalAlignment="Top" Width="75" Click="btnCancel_Click" />
        <TextBox Height="32" HorizontalAlignment="Left" Name="txtUserName" VerticalAlignment="Top" Width="278" />
    </Grid>
</Window>

（2）子窗口属性设置

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace WpfApplication1
{
    /// <summary>
    /// InputWindow.xaml 的交互逻辑
    /// </summary>
    public partial class InputWindow : Window
    {
        public string InputValue { set; get; }
        public InputWindow()
        {
            InitializeComponent();
        }

        private void btnCancel_Click(object sender, RoutedEventArgs e)
        {            
            DialogResult = false; //如果窗口是用ShowDialog打开的，则给dialogresult赋值就会自动关闭窗口，并把结果值返回
        }

        private void btnOk_Click(object sender, RoutedEventArgs e)
        {
            InputValue = txtUserName.Text;
            DialogResult = true; //如果窗口是用ShowDialog打开的，则给dialogresult赋值就会自动关闭窗口，并把结果值返回
        }
    }
}

（3）主界面设计

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication1
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void btnOpen_Click(object sender, RoutedEventArgs e)
        {
            InputWindow inputWin = new InputWindow();
            bool? b = inputWin.ShowDialog();

            if (b == null)
            {
                MessageBox.Show("没设置？");
            }else if(b == true){
                MessageBox.Show("确定"+inputWin.txtUserName);
            }else{
                MessageBox.Show("取消");
            }
        }
    }
}