在silverlight中读写文件

首先打开属性，选中允许在浏览器外允许应用程序，然后点击“浏览器外设置”，最后选中“在浏览器之外允许时需要提升的信任”，窗口样式选择”无边框圆角“如图：

XAML代码：

    <Grid x:Name="LayoutRoot"  Width="695">
        <Grid.Background>
            <LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
                <GradientStop Color="Black" Offset="1" />
                <GradientStop Color="White" Offset="0.785" />
            </LinearGradientBrush>
        </Grid.Background>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="115" />
        </Grid.ColumnDefinitions>
        <Border>
            <StackPanel Orientation="Vertical" Grid.Column="0" Background="Transparent">
                <RichTextBox Name="rtbContent" Height="405" ScrollViewer.VerticalScrollBarVisibility="Auto"  ScrollViewer.HorizontalScrollBarVisibility="Auto" >
                </RichTextBox>
            </StackPanel>
        </Border>
        <Border Grid.Column="1">
            <StackPanel Orientation="Vertical" >
                <StackPanel Orientation="Vertical"  Height="20">
                    <Image Name="imgClose" Width="20" Height="20" HorizontalAlignment="Right"  MouseLeftButtonDown="imgClose_MouseLeftButtonDown" Source="/ReadingWritingFilesSrc;component/Image/close.png"></Image>
                </StackPanel>
                <Button Content="Read File" Name="btnReadFile" Width="100" Height="20" Margin="0,160,0,0" Click="ReadFileFromLocalDrive"></Button>
                <Button Content="Write File" Name="btnWriteFile" Width="100" Height="20" Margin="0,30,0,0" Click="WriteFileToLocalDrive"></Button>
            </StackPanel>
        </Border>
    </Grid>

CS代码：

<span style="font-size: 12px;">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.IO;
 
namespace ReadingWritingFilesSrc
{
    public partial class MainPage : UserControl
    {
        StreamReader fileReader = null;
        StreamWriter fileWriter = null;
 
        public MainPage()
        {
            InitializeComponent();
        }
 
        private void imgClose_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            Application.Current.MainWindow.Close();
        }
 
        private void ReadFileFromLocalDrive(object sender, RoutedEventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = &quot;Text Files|*.txt&quot;;
            ofd.Multiselect = false;
            if (ofd.ShowDialog() == true)
            {                
                using (fileReader = new StreamReader(ofd.File.OpenRead(), System.Text.Encoding.UTF8))
                {
                    rtbContent.Selection.Text = fileReader.ReadToEnd();
                }
            }
        }
 
        private void WriteFileToLocalDrive(object sender, RoutedEventArgs e)
        {
            SaveFileDialog sfd = new SaveFileDialog();
            sfd.Filter = &quot;Text files|*.txt&quot;;
 
            if (sfd.ShowDialog() == true)
            {
                using (fileWriter = new StreamWriter(sfd.OpenFile(),System.Text.Encoding.UTF8))
                {
                    rtbContent.SelectAll();
                    fileWriter.Write(rtbContent.Selection.Text);
                }
            }
        }
    }
}
</span>

效果图：

标签: silverlight