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尝尝ASP.NET中的小甜饼
出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-11-03 浏览: 211 ::
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使用ASP.NET我们可以很容易的对Cookie集合进行操作。它和ASP中的Cookie一样，都是附属于Request和Response对象的。Listing1和2分别给出了如何读和写Cookie的方法。图1和2则是相应的显示。
Listing 1这个文件的功能是写入cookie
<%@ language="C#" %>
<HTML>
<script language="C#" runat="server">
void WriteClicked(Object Sender, EventArgs e)
{
//创建一个新Cookie，其cookie名来自于NameField.Text
HttpCookie cookie = new HttpCookie(NameField.Text);
//设定Cookie的值
cookie.Value = ValueField.Text;
//设定cookie生命为1 minute，TimeSpan()是一个专门设定时间间隔的类，我们定义了其实例tsMinute
DateTime dtNow = DateTime.Now;
TimeSpan tsMinute = new TimeSpan(0, 0, 1, 0);
cookie.Expires = dtNow + tsMinute;
//添加Cookie
Response.Cookies.Add(cookie);
Response.Write("Cookie written. <br><hr>");
}
</script>
<body>
<h3>
Use the button below to write cookies to your browser
</h3>
The cookies will expire in one minute.
<form runat="server" ID="Form1">
Cookie Name
<asp:textbox id="NameField" runat="server" />
<br>
Cookie Value
<asp:textbox id="ValueField" runat="server" />
<br>
<asp:button text="WriteCookie" onclick="WriteClicked" runat="server" ID="Button1" />
<br>
</form>
<a href="readcookies.aspx">Read the cookies</a>
</body>
</HTML>
图1
Listing 2 这个文件是为了读取刚才写入的cookie值
<%@ language="C#" %>
<script runat="server">
void ReadClicked(Object Sender, EventArgs e)
{
//取得想要的Cookie名
String strCookieName = NameField.Text;
//取得此Cookie名对应的对象，注意目前的得到的cookie是个对象
HttpCookie cookie = Request.Cookies[strCookieName];
//检验Cookie是否已经存在
if (null == cookie) {
Response.Write("Cookie not found. <br><hr>");
}
else {
//显示Cookie的值
String strCookieValue = cookie.Value.ToString();
Response.Write("The " + strCookieName + " cookie contains: <b>"
+ strCookieValue + "</b><br><hr>");
}
}
</script>
<html>
<body>
Use the button below to read a cookie
<br>
<form runat="server" ID="Form1">
Cookie Name
<asp:textbox id="NameField" runat="server" />
<asp:button text="ReadCookie" onclick="ReadClicked" runat="server" ID="Button1" />
</form>
<a href="writecookies.aspx">Write Cookies</a>
</body>
</html>
图2
为了更好的了解cookie的读写，代
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