ASP.NET为cookie设置默认值

Question

So i made 2 pages, one for settings and one for label and images. the thing that i want is when there is no cookies the img_gm.BorderWidth and img_gm.Bordercolor will be 1 and Black by default, but it seems error always occur in libe "img_gm.BorderWidth = Convert.ToInt32(cookie["width"]);" any help will be appreciated.

*i put text box, dropdown list and radio button in settings page to get an input of cookies["width"], cookies["color"] and cookies["font"]

protected void Page_Load(object sender, EventArgs e) {

    HttpCookie cookie = Request.Cookies["settings"];
    if (Request.Cookies.AllKeys.Contains("settings") == null)
    {
        cookie["width"] = "1";
        cookie["color"] = "Black";
        cookie.Expires = DateTime.Now.AddDays(14);
        Response.Cookies.Add(cookie);
    }
    else
    {

        img_gm.BorderWidth = Convert.ToInt32(cookie["width"]);
        img_gm.BorderColor = System.Drawing.Color.FromName(cookie["color"]);
        switch (cookie["font"])
        {
            case "Bold":
                lbl_desc.Font.Bold = true;
                break;
            case "Italic":
                lbl_desc.Font.Italic = true;
                break;
            case "Overline":
                lbl_desc.Font.Overline = true;
                break;
            case "Underline":
                lbl_desc.Font.Underline = true;
                break;
        }

    }

Answer 1

A neat trick is to change them to Properties in your class:

public int CookieWidth {
  get {
    int width;
    var str = String.Format("{0}", cookie["width"]);
    if (!Integer.TryParse(str, width)) {
      width = 1;
    }
    return width;
  }
  set {
    cookie["width"] = value;
  }
}

You can do that with Color, also.