Retrieve (Get) comma separated Cookie value as Array in ASP.Net using C# and VB.Net

Hi nauna,

Refer below example. For separate the numbers use split function.

For Read Write cookie refer ASP.Net Cookies: Read, Write (Save) and Remove (Delete) Cookies in ASP.Net using C# and VB.Net.

HTML

<asp:TextBox ID="txtNumbers" runat="server"></asp:TextBox><br />
<asp:Button ID="btnWrite" runat="server" Text="Write" OnClick="OnWrite" />
<asp:Button ID="btnRead" runat="server" Text="Read" OnClick="OnRead" /><hr />
<asp:GridView runat="server" ID="gvDetails" />

Code

C#

protected void OnWrite(object sender, EventArgs e)
{
    HttpCookie cookie = new HttpCookie("Numbers");
    cookie.Value = txtNumbers.Text.Trim();
    cookie.Expires = DateTime.Now.AddDays(30);
    Response.Cookies.Add(cookie);
    txtNumbers.Text = string.Empty;
}

protected void OnRead(object sender, EventArgs e)
{
    HttpCookie cookie = Request.Cookies["Numbers"];
    List<string> numbers = cookie.Value.Split(',').ToList();
    gvDetails.DataSource = numbers;
    gvDetails.DataBind();
}

VB.Net

Protected Sub OnWrite(sender As Object, e As EventArgs)
    Dim cookie As HttpCookie = New HttpCookie("Numbers")
    cookie.Value = txtNumbers.Text.Trim()
    cookie.Expires = DateTime.Now.AddDays(30)
    Response.Cookies.Add(cookie)
    txtNumbers.Text = String.Empty
End Sub

Protected Sub OnRead(sender As Object, e As EventArgs)
    Dim cookie As HttpCookie = Request.Cookies("Numbers")
    Dim numbers As List(Of String) = cookie.Value.Split(",").ToList()
    gvDetails.DataSource = numbers
    gvDetails.DataBind()
End Sub

Screenshot