C#实现仿msn提示消息在登录后只弹出一次的效果(downmoon)

在 codeproject 上看到一个很不错的控件，完全能够自定义弹出窗口的样式、内容、链接，该控件支持Mozilla, Internet Explorer 和 Opera，我试用了一下，效果非常不错，推荐大家使用。

• Download demo project (C# and VB.NET) - 38.1 Kb
• Download control with source - 37.7 Kb
• Download control documentation - 71.1 Kb

• Open online sample [^].

 

 

下面主要介绍该控件结合cookie实现登录后只提醒一次的功能！
一、定义变量}

members#region members
        protected AgronetControl.PopupWin pwVegnet;
        private  string downmoontest="downmoontest";
        #endregion

二、按钮事件

Events#region Events
        private void Page_Load(object sender, System.EventArgs e)
        ...{
            pwVegnet.LinkClicked+=new EventHandler(pwVegnet_LinkClicked);
            this.pwVegnet.Visible=false;
            if(!IsPostBack)
            ...{
                bool bl=IsShowMessage();
                if(bl)
                ...{
                    SetMessage();
                    setCookies(downmoontest,"yes",1);
                }
                else
                ...{
                    this.pwVegnet.Visible=false;
                }
            }
        }
        /**//// <summary>
        /// 注销按钮
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnLogOff_Click(object sender, System.EventArgs e)
        ...{
            RemoveAll();
        }
        private void pwVegnet_LinkClicked(object sender, EventArgs e)
        ...{
            //此处可以加上"下次是否显示之类的脚本"---downmoon 
            Page.Response.Redirect(@"http://www.vegnet.com.cn/user/");
        }

三、主要方法：

Methods#region Methods
        private void SetMessage()
        ...{
            pwVegnet.HideAfter=5000;
            pwVegnet.Visible=true;
            pwVegnet.Title=textTitle.Text;
            pwVegnet.Message=textMsg.Text;
            pwVegnet.Text=textFull.Text;
            pwVegnet.DragDrop=true;
            pwVegnet.OffsetX=30;
            pwVegnet.OffsetY=15;
            pwVegnet.DockMode=AgronetControl.PopupDocking.BottomRight;
            //随机弹出窗口样式
            int t=GetRandomID(1,4);
            switch(t)
            ...{
                case 1: pwVegnet.ColorStyle=AgronetControl.PopupColorStyle.Red;break;
                case 2: pwVegnet.ColorStyle=AgronetControl.PopupColorStyle.Green;break;
                case 3: pwVegnet.ColorStyle=AgronetControl.PopupColorStyle.Blue;break;
                case 4: pwVegnet.ColorStyle=AgronetControl.PopupColorStyle.Violet;break;
                default:pwVegnet.ColorStyle=AgronetControl.PopupColorStyle.Green;break;
            } 
            pwVegnet.Link=@"http://www.vegnet.com.cn";

        }

        private bool IsShowMessage()
        ...{
            string str=getCookies(downmoontest);
            if(str==string.Empty ||str.ToLower()=="no")
            ...{
                return true;
            }
            else
            ...{
                return false;
            }

        }
        public void MsgBox(string strDebug)
        ...{
            Page.Response.Write("<script language=javascript>alert('"+strDebug.Replace("'","").Replace(" ","")+"');</script>");
            //Page.Response.End();
        }
        public static   string RandomKey(int b,int e)
        ...{
            return DateTime.Now.ToString("yyyyMMdd-HHmmss-fff-")+GetRandomID(b,e); 
        }
        
        public static  int GetRandomID(int minValue,int maxValue)
        ...{
            Random ri=new Random(unchecked((int)DateTime.Now.Ticks));
            int k=ri.Next(minValue,maxValue);
            return k;
        }
        
        设置cookie#region 读cookie
        private void setCookies(string cook,string valuee,int num)
        ...{
            //Response.Cookies.Clear();
            HttpCookie cookie ;
            cookie=Request.Cookies[cook];
            if(cookie==null)
            ...{
                cookie= new HttpCookie(cook);
                cookie.Value = valuee;
                cookie.Expires=DateTime.Now.AddDays(num);
                HttpContext.Current.Response.Cookies.Add(cookie);
            }
            else
            ...{
                cookie.Value = valuee;
            }
            
        }
        
        #endregion
        读cookie#region 写cookie
        private string getCookies(string cook)
        ...{
            HttpCookie readcookie = Request.Cookies[cook];
            if(readcookie!=null && readcookie.Value!=null)
            ...{
                return readcookie.Value;
            }
            else
            ...{
                return string.Empty;
            }
        }

        #endregion

        去除SESSION/注销#region 去除SESSION/注销
        /**//// <summary>
        /// 去除SESSION/注销
        /// </summary>
        public void RemoveAll()
        ...{
            HttpCookieCollection cooks = HttpContext.Current.Response.Cookies;
            cooks[downmoontest].Expires = new DateTime(1999, 10, 12);
            HttpContext.Current.Response.Cookies.Add(cooks[downmoontest]);
        }

        #endregion

        
        #endregion

实现效果：

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