COOKIE为什么取值问题

lnwuyaowei 2005-01-22 09:40:42
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'If Not Page.IsPostBack Then
Dim vote_name
Dim vote_item

vote_item = Request("vote_item")
vote_name = Request("vote_name")
DataGrid1.Caption = vote_name

'==================================================================test
'Label4.Text = Response.Cookies.Item("mysite_cookie").Value

'Dim i As Integer
'For i = 0 To Request.Cookies.Count - 1
' Response.Write("name:" & Request.Cookies.Item(i).Name & "<br>")
' Response.Write("value:" & Request.Cookies.Item(i).Value & "<br>")

'Next
'If Response.Cookies.Item("mysite_cookie").Value <> "vote_ok" Then
' Response.Write("vote_ok is <>")
'End If
'==============================================================



'设置投票数据更新
If Response.Cookies.Item("mysite_cookie").Value <> "vote_ok" Then
Response.Cookies.Item("mysite_cookie").Expires = Now.AddDays(3)
Response.Cookies.Item("mysite_cookie").Value = "vote_ok"

Dim updatesqlstring As String
updatesqlstring = "update voteitem set item_count = item_count + 1 where item_id = " & vote_item
Dim updatecommand As OleDbCommand = New OleDbCommand(updatesqlstring, OleDbConnection1)
OleDbConnection1.Open()
updatecommand.ExecuteNonQuery()
OleDbConnection1.Close()
Label3.Text = "投票成功!"
Else
Label3.Text = "您已经投过票了!请查看投票结果。"
End If

'取得投票列表
Dim sqlstring As String
Dim mycommand As OleDbCommand
sqlstring = "select item_name,item_count,vt_id from voteitem where "
sqlstring += "vt_id = (select vt_id from voteitem where item_id = " & vote_item & ")"
mycommand = New OleDbCommand(sqlstring, OleDbConnection1)
Dim mydataadapter As New OleDbDataAdapter(mycommand)
mydataadapter.Fill(DataSet11, "voteitem")

Page.DataBind()
'End If

End Sub
问题:If Response.Cookies.Item("mysite_cookie").Value <> "vote_ok" Then 为什么取值总是不等于"vote_ok",另外,还请教能不能动态的设定COOKIE 的NAME值,防止重复投票上是怎么处理的?
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Aruis 2005-01-22
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//设置
HttpCookie myCookie = new HttpCookie("MyTestCookie");
DateTime now = DateTime.Now;

// Set the cookie value.
myCookie.Value = now.ToString();
// Set the cookie expiration date.
myCookie.Expires = now.AddMinutes(1);

// Add the cookie.
Response.Cookies.Add(myCookie);

Response.Write("<p> The cookie has been written.");


//读取
HttpCookie myCookie = new HttpCookie("MyTestCookie");
myCookie = Request.Cookies["MyTestCookie"];

// Read the cookie information and display it.
if (myCookie != null)
Response.Write("<p>"+ myCookie.Name + "<p>"+ myCookie.Value);
else
Response.Write("not found");


//MSDN
jerry_yuan 2005-01-22
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设值用Response.Cookies.Item("mysite_cookie").Value="vote_ok"
取值用dim str as string=Request.Cookies.Item("mysite_cookie").Value
wj2929 2005-01-22
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Request.Cookies.Item("mysite_cookie").Value
LoveCherry 2005-01-22
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Request.Cookies

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