概述
Silverlight 2 Beta 1版本发布了,无论从Runtime还是Tools都给我们带来了很多的惊喜,如支持框架语言Visual Basic, Visual C#, IronRuby, Ironpython,对JSON、Web Service、WCF以及Sockets的支持等一系列新的特性。《一步一步学Silverlight 2系列》文章将从Silverlight 2基础知识、数据与通信、自定义控件、动画、图形图像等几个方面带您快速进入Silverlight 2开发。
本文是Silverlight 2与浏览器交互的最后一篇,将介绍相关的辅助类方法。
获取浏览器信息
在Silverlight 2中提供了获取浏览器信息的一个类BrowserInformation,可供我们直接调用,如获取浏览器名称及浏览器版本,是否禁用Cookies等信息。做一个简单的示例,定义XAML如下:
<Grid x:Name="LayoutRoot" Background="#CDFCAE"> <Grid.RowDefinitions> <RowDefinition Height="40"></RowDefinition> <RowDefinition Height="40"></RowDefinition> <RowDefinition Height="40"></RowDefinition> <RowDefinition Height="40"></RowDefinition> <RowDefinition Height="140"></RowDefinition> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="300"></ColumnDefinition> <ColumnDefinition Width="300"></ColumnDefinition> </Grid.ColumnDefinitions> <TextBlock Text="Name:" Style="{StaticResource title}" Grid.Row="0" Grid.Column="0"></TextBlock> <TextBlock x:Name="Name" Style="{StaticResource content}" Grid.Row="0" Grid.Column="1"></TextBlock> <TextBlock Text="BrowserVersion:" Style="{StaticResource title}" Grid.Row="1" Grid.Column="0"></TextBlock> <TextBlock x:Name="BrowserVersion" Style="{StaticResource content}" Grid.Row="1" Grid.Column="1"></TextBlock> <TextBlock Text="CookiesEnabled:" Style="{StaticResource title}" Grid.Row="2" Grid.Column="0"></TextBlock> <TextBlock x:Name="CookiesEnabled" Style="{StaticResource content}" Grid.Row="2" Grid.Column="1"></TextBlock> <TextBlock Text="Platform:" Style="{StaticResource title}" Grid.Row="3" Grid.Column="0"></TextBlock> <TextBlock x:Name="Platform" Style="{StaticResource content}" Grid.Row="3" Grid.Column="1"></TextBlock> <TextBlock Text="UserAgent:" Style="{StaticResource title}" Grid.Row="4" Grid.Column="0"></TextBlock> <TextBlock x:Name="UserAgent" Style="{StaticResource content}" Grid.Row="4" Grid.Column="1" TextWrapping="Wrap"></TextBlock> </Grid>
private void UserControl_Loaded(object sender, RoutedEventArgs e) { BrowserInformation browser = HtmlPage.BrowserInformation; Name.Text = browser.Name; BrowserVersion.Text = browser.BrowserVersion.ToString(); CookiesEnabled.Text = browser.CookiesEnabled.ToString(); Platform.Text = browser.Platform; UserAgent.Text = browser.UserAgent; }
运行之后,如下图所示:
![](http://img1.51cto.com/attachment/200803/200803251206415663125.png)
HttpUtility方法
类似于WebForm开发中一样,在Silverlight 2中同样提供了一一些HttpUtility方法,共有四个HtmlEncode、HtmlDecode、UrlEncode、UrlDecode,看一个简单的例子:
<Grid x:Name="LayoutRoot" Background="#CDFCAE"> <Grid.RowDefinitions> <RowDefinition Height="75"></RowDefinition> <RowDefinition Height="75"></RowDefinition> <RowDefinition Height="75"></RowDefinition> <RowDefinition Height="75"></RowDefinition> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="400"></ColumnDefinition> <ColumnDefinition Width="200"></ColumnDefinition> </Grid.ColumnDefinitions> <TextBox x:Name="txtHtmlEncode" Grid.Row="0" Grid.Column="0" Width="300" Height="40"></TextBox> <Button x:Name="btnHtmlEncode" Grid.Row="0" Grid.Column="1" Background="Red" Width="120" Height="40" Content="HtmlEncode" Click="btnHtmlEncode_Click"></Button> <TextBox x:Name="txtHtmlDecode" Grid.Row="1" Grid.Column="0" Width="300" Height="40"></TextBox> <Button x:Name="btnHtmlDecode" Grid.Row="1" Grid.Column="1" Background="Red" Width="120" Height="40" Content="HtmlDecode" Click="btnHtmlDecode_Click"></Button> <TextBox x:Name="txtUrlEncode" Grid.Row="2" Grid.Column="0" Width="300" Height="40"></TextBox> <Button x:Name="btnUrlEncode" Grid.Row="2" Grid.Column="1" Background="Red" Width="120" Height="40" Content="UrlEncode" Click="btnUrlEncode_Click"></Button> <TextBox x:Name="txtUrlDecode" Grid.Row="3" Grid.Column="0" Width="300" Height="40"></TextBox> <Button x:Name="btnUrlDecode" Grid.Row="3" Grid.Column="1" Background="Red" Width="120" Height="40" Content="UrlDecode" Click="btnUrlDecode_Click"></Button> </Grid>
编写按钮处理事件:
private void btnHtmlEncode_Click(object sender, RoutedEventArgs e) { this.txtHtmlDecode.Text = HttpUtility.HtmlEncode(this.txtHtmlEncode.Text); } private void btnHtmlDecode_Click(object sender, RoutedEventArgs e) { this.txtHtmlEncode.Text = HttpUtility.HtmlDecode(this.txtUrlDecode.Text); } private void btnUrlEncode_Click(object sender, RoutedEventArgs e) { this.txtUrlDecode.Text = HttpUtility.UrlEncode(this.txtUrlEncode.Text); } private void btnUrlDecode_Click(object sender, RoutedEventArgs e) { this.txtUrlEncode.Text = HttpUtility.UrlDecode(this.txtUrlDecode.Text); }
运行后测试如下:
![](http://img1.51cto.com/attachment/200803/200803251206415683578.png)
结束语
本文简单介绍了Silverlight 2与浏览器交互的相关辅助类方法。
本文出自 “TerryLee技术专栏” 博客,请务必保留此出处http://terrylee.blog.51cto.com/342737/67271
本文出自 51CTO.COM技术博客