Silverlight学习笔记基本控件（二）

TextBlock:

前台代码

<UserControl.Resources>
        <Style TargetType="TextBox">
            <Setter Property="Width" Value="120"></Setter>
           
        </Style>
        <Style TargetType="TextBlock" x:Key="lbl">
            <Setter Property="Width" Value="100"></Setter>
            <Setter Property="TextAlignment" Value="Right"></Setter>
            <Setter Property="VerticalAlignment" Value="Center"></Setter>
        </Style>

    </UserControl.Resources>
        <Grid x:Name="LayoutRoot" Background="White" ShowGridLines="True">
        <Grid.RowDefinitions>
            <RowDefinition Height="50"></RowDefinition>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition></ColumnDefinition>
            <ColumnDefinition Width="60"></ColumnDefinition>
        </Grid.ColumnDefinitions>
        <TextBlock x:Name="title" Text="XML文件数据查询界面" FontWeight="Bold" Grid.Row="0" FontSize="16" Grid.ColumnSpan="3" Grid.Column="0" HorizontalAlignment="Center"></TextBlock>
        <StackPanel FlowDirection="LeftToRight" Orientation="Horizontal" Grid.Row="0" Height="28"  Grid.ColumnSpan="2" HorizontalAlignment="Center" VerticalAlignment="Bottom">
            <TextBlock Text="请输入员工姓名："></TextBlock>
            <TextBox x:Name="txtNameSearch" Width="100">
                <TextBox.Text>高</TextBox.Text></TextBox>
            <Button x:Name="btnSearch" Content="查询" Padding="20,5" Click="btnSearch_Click"></Button>
        </StackPanel>
        <StackPanel Grid.Row="1" Grid.ColumnSpan="2"  x:Name="SPContent" >
            <Border Width="auto" Height="auto" BorderThickness="1" CornerRadius="5" BorderBrush="#39c">
                <StackPanel>
                <StackPanel Orientation="Horizontal" >
                    <TextBlock Text="姓名：" TextAlignment="Right"  Style="{StaticResource lbl}"></TextBlock>
                        <TextBox x:Name="txtName" Width="100"></TextBox>
                </StackPanel>
                <StackPanel Orientation="Horizontal" >
                        <TextBlock Text="性别：" TextAlignment="Right"  Style="{StaticResource lbl}"></TextBlock>
                        <TextBox x:Name="txtSex" IsEnabled="True" IsReadOnly="False"  Width="100"></TextBox>
                    </StackPanel>
                </StackPanel>
            </Border>
        </StackPanel>
    </Grid>

后台代码：

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 System.Xml.Linq;
namespace TextBoxDemo
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();
        }
        string valueToSearch;//输入的查询条件
        private void btnSearch_Click(object sender, RoutedEventArgs e)
        {
            if (string.IsNullOrEmpty(this.txtNameSearch.Text.Trim()))
            {
                MessageBox.Show("请输入查询条件!");
                return;
            }
            else {
                valueToSearch = txtNameSearch.Text.Trim();
                WebClient client = new WebClient();
                client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
               client.DownloadStringAsync(new Uri("../XML/Employees.xml",UriKind.Relative));
            }

        }
        private void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) {
          
            XDocument document = XDocument.Parse(e.Result);
            XElement el = XElement.Load(document.CreateReader());
            var items = (
                from item in el.Elements("employess").Elements("item")
                where item.Element("name").Value.StartsWith(valueToSearch)
                select new Employee
                {
                    EName = ((string)item.Element("name")),
                ESex = (string)item.Element("gender") }
                ).Take(1);
            if (items.Count() == 0)
            {
                MessageBox.Show("抱歉，找不到!");
                SPContent.DataContext = null;
            }
            else {
                Employee p = items.ElementAt<Employee>(0);
                System.Windows.Data.Binding binding = new System.Windows.Data.Binding("");
                binding.Mode = System.Windows.Data.BindingMode.OneWay;
                binding.Source = p.EName;
               
                txtName.SetBinding(TextBox.TextProperty,binding );
              
              
               
               
            }
        }
    }
   
    class Employee {
        public string EName { get; set; }
        public string ESex { get; set; }
    }
}