这么一个简单的COOKIE为什么不能写入客户端???

你必须设置cookie过期时间(Expires),才能看到.

解决方案 »

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<%@ 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>
如果客户端的IE禁用了Cookie，那么也不可以用的
1。禁用cookies ?
2.过时了吗？
不设施Exprise,临时文件中是看不到的,可以用代码读取,不过关闭游览器就失效
cookies 非禁用的情况下，以下代码才能生效。
设定cookie和读取cookie值
private void Button1_Click(object sender, System.EventArgs e)
{
HttpCookie hc=new HttpCookie("aa");
hc.Value="123";
DateTime dtNow = DateTime.Now.AddDays(1);
hc.Expires = dtNow;
this.Response.Cookies.Add(hc);
} private void Button2_Click(object sender, System.EventArgs e)
{
HttpCookie cookie = Request.Cookies["aa"];
TextBox1.Text=cookie.Value.ToString();
}
设置Expires后临时文件有了,可是为什么我登录的时候不会读出来???非要我重新编译源文件后才能读出来??
我看90%是你没设置COOKIE的有效时间.