Silverlight实用窍门系列：37.Silverlight和ASP.NET相互传参的两种常用方式(QueryString,Cookie)【附带实例源码】...
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在本节中将讲述Silverlight和ASP.NET页面的相互传参的两种常用方式：Cookie和QueryString。首先我们新建一个名为SLConnectASP.NET的Silverlight应用程序，然后在SLConnectASP.NET.web项目中添加一个Index.aspx的页面。
一、Silverlight和ASPX页面的QueryString传参
实现思路：在Silverlight端跳转到页面到Index.aspx并且传递一个QueryString参数ID，在该Index.aspx页面显示出ID。在Index.aspx页面有一个按钮可以向Silverlight所在页面传递一个参数aspxid，在Silverlight端读取aspxid参数并且显示出来。
首先我们看Silverlight后台代码：
#region QueryString传值 // QueryString步骤一 private void button2_Click( object sender, RoutedEventArgs e) { // 传递参数给Asp.net页面 HtmlPage.Window.Eval( " location=' " + Application.Current.Host.Source.AbsoluteUri.Replace( Application.Current.Host.Source.AbsolutePath, "" ) + " /index.aspx?id=203'; " ); } // QueryString步骤四 private void ShowQueryString() { // 接收到ASP.NET页面传送过来的QueryString值 IDictionary < String, String > paras = HtmlPage.Document.QueryString; if (paras.ContainsKey( " aspxid " )) { this .label1.Content = " 获取到ASP.NET传值： " + paras[ " aspxid " ]; } } #endregion
然后我们来看Index.aspx.cs的代码如下：
#region ASP.NET端操作Silverlight传输过来的QueryString值 // QueryString步骤二 private void BindQueryString() { // ASP.NET端获取到Silverlight传输过来的QueryString值 if (Request.QueryString.Count > 0 ) { this .Label1.Text = " 获取到的Silverlight客户端QueryString值是： " + Request.QueryString[ " id " ].ToString(); } } // QueryString步骤三 protected void Button1_Click( object sender, EventArgs e) { // 回传QueryString值给Silverlight客户端 Response.Redirect( " ./SLConnectASP.NETTestPage.aspx?aspxid=109 " ); } #endregion
二、Silverlight和ASPX页面的Cookie传参
实现思路：在Silverlight端创建一个Key名为FirCookieKey，Value值为FirCookieValue的Cookie，然后跳转页面到Index.aspx页面，在该页面显示出来。在该页面有一个按钮可以修改这个Cookie，并且跳转回Silverlight端，在Silverlight端读取这个已经被修改过的Cookie并且显示出来。
首先我们看Silverlight端的后台代码MainPage.xaml.cs：包括步骤一创建Cookie、步骤四读取被修改过的Cookie
#region Cookie传值 // Cookie步骤一 private void button1_Click( object sender, RoutedEventArgs e) { // 编写一个键为FirCookieKey，值为FirCookieValue的Cookie string oldCookie = HtmlPage.Document.GetProperty( " cookie " ) as String; DateTime expiration = DateTime.UtcNow + TimeSpan.FromDays( 2000 ); string cookie = String.Format( " {0}={1};expires={2} " , " FirCookieKey " , " FirCookieValue " , expiration.ToString( " R " )); HtmlPage.Document.SetProperty( " cookie " , cookie); // 跳转界面 HtmlPage.Window.Eval( " location=' " + Application.Current.Host.Source.AbsoluteUri.Replace( Application.Current.Host.Source.AbsolutePath, "" ) + " /index.aspx'; " ); } // Cookie步骤四 private void ShowCookie() { // 显示当前键为FirCookieKey的Cookie值 String[] cookies = HtmlPage.Document.Cookies.Split( ' ; ' ); foreach (String cookie1 in cookies) { String[] keyValues = cookie1.Split( ' = ' ); if (keyValues[ 0 ] == " FirCookieKey " ) { this .textBox2.Content = " Cookie的Key值是： " + keyValues[ 0 ]; this .textBox1.Content = " Cookie的Value值是： " + keyValues[ 1 ]; } }; } #endregion
接着我们来看Index.aspx.cs，包括Cookie操作二和Cookie操作三
#region ASP.NET端获取到操作Cookie值 // Cookie操作二 private void BindCookie() { // ASP.NET端获取到Silverlight传输过来的Cookie值 HttpCookie cookie = Request.Cookies[ " FirCookieKey " ]; if (cookie.Value != null ) { this .Label2.Text = " 获取到的Silverlight客户端Cookie值: " + cookie.Value; } } // Cookie操作三 protected void Button2_Click( object sender, EventArgs e) { // 回传重新设置Cookie值然后传输给Silverlight HttpCookie cookie = Request.Cookies[ " FirCookieKey " ]; cookie.Value = " NewCookieValue " ; HttpContext.Current.Response.Cookies.Add(cookie); Response.Redirect( " ./SLConnectASP.NETTestPage.aspx " ); } #endregion
最后这两个实例的MainPage.xaml的代码如下：
< Grid x:Name = " LayoutRoot " Background = " White " > < sdk:Label Height = " 27 " HorizontalAlignment = " Left " Margin = " 41,25,0,0 " Name = " label1 " VerticalAlignment = " Top " Width = " 284 " /> < Button Content = " 传送浏览器参数 " Height = " 38 " HorizontalAlignment = " Left " Margin = " 41,63,0,0 " Name = " button2 " VerticalAlignment = " Top " Width = " 113 " Click = " button2_Click " /> < sdk:Label Height = " 27 " HorizontalAlignment = " Left " Margin = " 41,116,0,0 " Name = " textBox2 " VerticalAlignment = " Top " Width = " 284 " /> < sdk:Label Height = " 27 " HorizontalAlignment = " Left " Margin = " 41,149,0,0 " Name = " textBox1 " VerticalAlignment = " Top " Width = " 284 " /> < Button Content = " 设置Cookie值 " Height = " 38 " HorizontalAlignment = " Left " Margin = " 41,194,0,0 " Name = " button1 " VerticalAlignment = " Top " Width = " 113 " Click = " button1_Click " /> </ Grid >
Index.aspx的代码如下：
< div > < asp:Label ID = " Label1 " runat = " server " Text = " Label " ></ asp:Label > < br /> < br /> < asp:Button ID = " Button1 " runat = " server " Text = " 回传值给Silverlight应用程序QueryString " onclick = " Button1_Click " /> < br /> < br /> < asp:Label ID = " Label2 " runat = " server " Text = " Label " ></ asp:Label > < br /> < asp:Button ID = " Button2 " runat = " server " Text = " 回传值给Silverlight应用程序Cookie " onclick = " Button2_Click " /> < br /> </ div >
本实例采用VS2010+Silverlight 4.0编写。如需源码请点击 下载。本实例效果图如下：
本文转自程兴亮博客园博客，原文链接：http://www.cnblogs.com/chengxingliang/archive/2011/04/14/2015085.html，如需转载请自行联系原作者
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