很好很强大的验证码控件

/// /// 读取或设置验证码图片地址 /// /// The image page URL. [Description("读取或设置验证码图片地址"), Category("行为"), DefaultValue("../../Controls/Code.aspx")] public string ImagePageUrl { get { object objValidateCodeImagePageUrl = ViewState["ValidateCodeImagePageUrl"]; return objValidateCodeImagePageUrl == null ? "../../Controls/Code.aspx" : objValidateCodeImagePageUrl.ToString(); } set { ViewState["ValidateCodeImagePageUrl"] = value; } } object objValidateCodeImagePageUrl = ViewState["ValidateCodeImagePageUrl"]; return objValidateCodeImagePageUrl == null ? "../../Controls/Code.aspx" : objValidateCodeImagePageUrl.ToString(); } set { ViewState["ValidateCodeImagePageUrl"] = value; } }