SilverLight学习笔记--Silverlight的cookie操作
本文让我们一起来学习如何利用Silverlight的HtmlPage.Document对象，实现在Silverlight操作Cookies.
首先创建一个新的Silverlight应用程序,如图:
为使用HtmlPage.Document对象，我们要引入命名空间
1、添加key-value键值对
2、根据key删除
3、根据key读取value
4、读取cookie所有内容
5、判断key-value是否在cookie中存在
代码如下:
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Browser; //引入此空间以便于使用Cookie操作
namespace SLCookieOperate
{
public class SLCookieHelp
{
Cookie相关操作函数#region Cookie相关操作函数
设置持久时间长的Cookie#region 设置持久时间长的Cookie
/**//// <summary>
/// 设置持久时间长的Cookie
/// </summary>
/// <param name="key">the cookie key</param>
/// <param name="value">the cookie value</param>
public static void SetCookie(string key, string value)
{
string oldCookie = HtmlPage.Document.GetProperty("cookie") as String;
DateTime expiration = DateTime.UtcNow + TimeSpan.FromDays(2000);
string cookie = String.Format("{0}={1};expires={2}", key, value, expiration.ToString("R"));
HtmlPage.Document.SetProperty("cookie", cookie);
}
#endregion
读取一个已经存在的Cookie#region 读取一个已经存在的Cookie
/**//// <summary>
/// 读取一个已经存在的Cookie
/// </summary>
/// <param name="key">cookie key</param>
/// <returns>null if the cookie does not exist, otherwise the cookie value</returns>
public static string GetCookie(string key)
{
string[] cookies = HtmlPage.Document.Cookies.Split(';');
key += '=';
foreach (string cookie in cookies)
{
string cookieStr = cookie.Trim();
if (cookieStr.StartsWith(key, StringComparison.OrdinalIgnoreCase))
{
string[] vals = cookieStr.Split('=');
if (vals.Length >= 2)
{
return vals[1];
}
return string.Empty;
}
}
return null;
}
#endregion
删除特定的Cookie(清空它的Value值，过期值设置为-1天)#region 删除特定的Cookie(清空它的Value值，过期值设置为-1天)
/**//// <summary>
/// 删除特定的Cookie(清空它的Value值，过期值设置为-1天)
/// </summary>
/// <param name="key">the cookie key to delete</param>
public static void DeleteCookie(string key)
{
string oldCookie = HtmlPage.Document.GetProperty("cookie") as String;
DateTime expiration = DateTime.UtcNow - TimeSpan.FromDays(1);
string cookie = String.Format("{0}=;expires={1}", key, expiration.ToString("R"));
HtmlPage.Document.SetProperty("cookie", cookie);
}
#endregion
判定指定的key-value对是否在cookie中存在#region 判定指定的key-value对是否在cookie中存在
public static bool Exists(String key, String value)
{
return HtmlPage.Document.Cookies.Contains(
String.Format("{0}={1}", key, value)
);
}
#endregion
获取当前cookie内容#region 获取当前cookie内容
public static string getCookieContent()
{
return HtmlPage.Document.GetProperty("cookie") as String;
}
#endregion
#endregion
}
}
创建用户界面如下图:
用户界面xaml代码如下:
Page.xaml.cs的代码如下:
(转载本文请注明出处)
首先创建一个新的Silverlight应用程序,如图:
为使用HtmlPage.Document对象，我们要引入命名空间
using System.Windows.Browser; //引入此空间以便于使用Cookie操作
为操作Cookie,我们创建一个类:SLCookieHelp.cs，此类的操作包括：1、添加key-value键值对
2、根据key删除
3、根据key读取value
4、读取cookie所有内容
5、判断key-value是否在cookie中存在
代码如下:
创建用户界面如下图:
用户界面xaml代码如下:
<UserControl x:Class="SLCookieOperate.Page"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="400" Height="400">
<Grid x:Name="LayoutRoot" Background="White">
<StackPanel>
<TextBlock Text="Silverlight操作Cookie学习总结" TextAlignment="Center" Margin="8" FontSize="16" Foreground="red" ></TextBlock>
<TextBlock Text="请输入Key" TextAlignment="Center" Margin="0,10,0,0"></TextBlock>
<TextBox x:Name="txtBxKey" Width="250"></TextBox>
<TextBlock Text="请输入Value" TextAlignment="Center"></TextBlock>
<TextBox x:Name="txtBxValue" Width="250"></TextBox>
<Button Width="200" Height="30" Content="添加key-value对入cookie" Margin="4" Click="Button_Click" ></Button>
<Button Width="200" Height="30" Content="根据key删除key-value对" Margin="4" Click="Button_Click_1"></Button>
<Button Width="200" Height="30" Content="根据key读取对应value" Margin="4" Click="Button_Click_2"></Button>
<Button Width="200" Height="30" Content="读取当前cookie内容" Margin="4" Click="Button_Click_4"></Button>
<Button Width="200" Height="30" Content="判断存在key-value对" Margin="4" Click="Button_Click_3"></Button>
<TextBlock Text="当前的Cookie内容" TextAlignment="Center" Foreground="Red"></TextBlock>
<TextBlock x:Name="tbCookie" TextAlignment="Center" Foreground="Green" TextWrapping="Wrap" Width="280" ></TextBlock>
</StackPanel>
</Grid>
</UserControl>
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="400" Height="400">
<Grid x:Name="LayoutRoot" Background="White">
<StackPanel>
<TextBlock Text="Silverlight操作Cookie学习总结" TextAlignment="Center" Margin="8" FontSize="16" Foreground="red" ></TextBlock>
<TextBlock Text="请输入Key" TextAlignment="Center" Margin="0,10,0,0"></TextBlock>
<TextBox x:Name="txtBxKey" Width="250"></TextBox>
<TextBlock Text="请输入Value" TextAlignment="Center"></TextBlock>
<TextBox x:Name="txtBxValue" Width="250"></TextBox>
<Button Width="200" Height="30" Content="添加key-value对入cookie" Margin="4" Click="Button_Click" ></Button>
<Button Width="200" Height="30" Content="根据key删除key-value对" Margin="4" Click="Button_Click_1"></Button>
<Button Width="200" Height="30" Content="根据key读取对应value" Margin="4" Click="Button_Click_2"></Button>
<Button Width="200" Height="30" Content="读取当前cookie内容" Margin="4" Click="Button_Click_4"></Button>
<Button Width="200" Height="30" Content="判断存在key-value对" Margin="4" Click="Button_Click_3"></Button>
<TextBlock Text="当前的Cookie内容" TextAlignment="Center" Foreground="Red"></TextBlock>
<TextBlock x:Name="tbCookie" TextAlignment="Center" Foreground="Green" TextWrapping="Wrap" Width="280" ></TextBlock>
</StackPanel>
</Grid>
</UserControl>
Page.xaml.cs的代码如下:
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.Threading;
using System.Text;
using System.IO;
using System.Windows.Browser; //引入此空间以便于使用Cookie操作
namespace SLCookieOperate
{
public partial class Page : UserControl
{
public Page()
{
InitializeComponent();
}
#region 清除文本输入框
private void txtBxClear()
{
this.txtBxKey.Text = "";
this.txtBxValue.Text = "";
}
#endregion
private void Button_Click(object sender, RoutedEventArgs e)
{
try
{
string keyStr = this.txtBxKey.Text.ToString();
string valueStr = this.txtBxValue.Text.ToString();
if (!(String.IsNullOrEmpty(keyStr) || String.IsNullOrEmpty(valueStr)))
{
SLCookieHelp.SetCookie(keyStr, valueStr);
MessageBox.Show("添加成功！");
txtBxClear();
// string kk = HtmlPage.Document.Cookies;
this.tbCookie.Text = SLCookieHelp.getCookieContent();
}
else
{
MessageBox.Show("请输入key-value键值对！");
}
}
catch(Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
string keyStr = this.txtBxKey.Text.ToString();
if (!String.IsNullOrEmpty(keyStr))
{
SLCookieHelp.DeleteCookie(keyStr);
MessageBox.Show("成功删除！");
this.tbCookie.Text = SLCookieHelp.getCookieContent();
}
else
{
MessageBox.Show("请输入要删除的Key");
}
}
private void Button_Click_2(object sender, RoutedEventArgs e)
{
string keyStr = this.txtBxKey.Text.ToString();
if (!String.IsNullOrEmpty(keyStr))
{
string valueStr = SLCookieHelp.GetCookie(keyStr);
MessageBox.Show(string.Format("对应你输入的Key的Value是: {0}",valueStr));
}
else
{
MessageBox.Show("请输入要查找的Key");
}
}
private void Button_Click_3(object sender, RoutedEventArgs e)
{
string keyStr = this.txtBxKey.Text.ToString();
string valueStr = this.txtBxValue.Text.ToString();
if (!(String.IsNullOrEmpty(keyStr) || String.IsNullOrEmpty(valueStr)))
{
if (SLCookieHelp.Exists(keyStr, valueStr))
{
MessageBox.Show("此key-value对存在于cookie中");
}
else
{
MessageBox.Show("没有找到此 key-value");
}
}
else
{
MessageBox.Show("请输入要判定的Key与Value对");
}
}
private void Button_Click_4(object sender, RoutedEventArgs e)
{
this.tbCookie.Text = SLCookieHelp.getCookieContent();
}
}
}
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.Threading;
using System.Text;
using System.IO;
using System.Windows.Browser; //引入此空间以便于使用Cookie操作
namespace SLCookieOperate
{
public partial class Page : UserControl
{
public Page()
{
InitializeComponent();
}
#region 清除文本输入框
private void txtBxClear()
{
this.txtBxKey.Text = "";
this.txtBxValue.Text = "";
}
#endregion
private void Button_Click(object sender, RoutedEventArgs e)
{
try
{
string keyStr = this.txtBxKey.Text.ToString();
string valueStr = this.txtBxValue.Text.ToString();
if (!(String.IsNullOrEmpty(keyStr) || String.IsNullOrEmpty(valueStr)))
{
SLCookieHelp.SetCookie(keyStr, valueStr);
MessageBox.Show("添加成功！");
txtBxClear();
// string kk = HtmlPage.Document.Cookies;
this.tbCookie.Text = SLCookieHelp.getCookieContent();
}
else
{
MessageBox.Show("请输入key-value键值对！");
}
}
catch(Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
string keyStr = this.txtBxKey.Text.ToString();
if (!String.IsNullOrEmpty(keyStr))
{
SLCookieHelp.DeleteCookie(keyStr);
MessageBox.Show("成功删除！");
this.tbCookie.Text = SLCookieHelp.getCookieContent();
}
else
{
MessageBox.Show("请输入要删除的Key");
}
}
private void Button_Click_2(object sender, RoutedEventArgs e)
{
string keyStr = this.txtBxKey.Text.ToString();
if (!String.IsNullOrEmpty(keyStr))
{
string valueStr = SLCookieHelp.GetCookie(keyStr);
MessageBox.Show(string.Format("对应你输入的Key的Value是: {0}",valueStr));
}
else
{
MessageBox.Show("请输入要查找的Key");
}
}
private void Button_Click_3(object sender, RoutedEventArgs e)
{
string keyStr = this.txtBxKey.Text.ToString();
string valueStr = this.txtBxValue.Text.ToString();
if (!(String.IsNullOrEmpty(keyStr) || String.IsNullOrEmpty(valueStr)))
{
if (SLCookieHelp.Exists(keyStr, valueStr))
{
MessageBox.Show("此key-value对存在于cookie中");
}
else
{
MessageBox.Show("没有找到此 key-value");
}
}
else
{
MessageBox.Show("请输入要判定的Key与Value对");
}
}
private void Button_Click_4(object sender, RoutedEventArgs e)
{
this.tbCookie.Text = SLCookieHelp.getCookieContent();
}
}
}
运行效果如下:
(转载本文请注明出处)
转载于:https://www.cnblogs.com/wsdj-ITtech/archive/2009/08/15/1546815.html