vb.net 读写cookie

1. 写cookie

  Dim JSONCookie As New HttpCookie("JSONDATA")
    JSONCookie.Expires = DateTime.Now.AddMinutes(480)
    JSONCookie.Value = cookiestr

    HttpContext.Current.Response.Cookies.Add(JSONCookie)

2. 读cookie

  

Dim Jsonstr As String = HttpContext.Current.Request.Cookies("JSONDATA").Value.ToString

3.判断cookie 是否存在

If Request.Cookies("JSONDATA") Is Nothing Then
           
 End If