Mega Code Archive
Delete Cookie by setting the date of Expires
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<%@ Page %>
<script language="C#" runat="server">
private void Page_Init(object sender, EventArgs e)
{
if((Request.Cookies["UserName"] != null) &&
(Request.Cookies["UserName"].Value != null))
UserNameLabel.Text = Request.Cookies["UserName"].Value.ToString();
}
private void SaveButton_Click(object sender, System.EventArgs e)
{
Response.Cookies["UserName"].Value = UserNameTextBox.Text;
if(PersistCookieCheckBox.Checked)
Response.Cookies["UserName"].Expires = System.DateTime.Now.AddDays(1);
UserNameLabel.Text = UserNameTextBox.Text;
}
private void DeleteButton_Click(object sender, System.EventArgs e)
{
Response.Cookies["UserName"].Expires = System.DateTime.Now.AddDays(-1);
}
</script>
<html>
<body>
<form id="form1" method="post" runat="server">
Update UserName in Cookie:
<asp:TextBox id="UserNameTextBox" runat="server"></asp:TextBox>
<asp:Button id="SaveButton" runat="server" Text="Save" OnClick="SaveButton_Click"></asp:Button>
<asp:CheckBox id="PersistCookieCheckBox" runat="server" text="Persist Cookie?"></asp:CheckBox>
Current Cookie Contents:
<br>
<asp:Label ID="UserNameLabel" Runat="server" EnableViewState="False"></asp:Label>
<br>
<asp:Button id="RefreshButton" runat="server" Text="Refresh Without Saving"></asp:Button>
Deleting the cookie will take effect on the *next* postback, since the cookie information is still in Request.Cookies for the
duration of the PostBack once the Delete button is clicked. Click it once, then click the "Refresh Without Saving" button.
<asp:Button id="DeleteButton" runat="server" Text="Delete Cookie" OnClick="DeleteButton_Click"></asp:Button>
</form>
</body>
</html>
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