.net 防止重复提交代码,Asp.Net代码库,德仔网

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【Asp.Net】 .net 防止重复提交
作者:Dezai.CN / 发布于2013/6/12/ 578
防止重复提交

	public class RefreshServe : System.Web.UI.Page
	 {
	 private static ILog log = LogManager.GetLogger(typeof(RefreshServe));

	 private readonly string REFRESH_TICKET_NAME = "__RefreshTicketArray";
	 private readonly string HIDDEN_FIELD_NAME = "__RefreshHiddenField";
	 private readonly string HIDDEN_PAGE_GUID = "__RefreshPageGuid";

	 /// <summary>
	 /// 为True表示页面刷新,False为正常提交
	 /// </summary>
	 public bool IsPageRefreshed
	 {
	 get
	 {
	 if (IsPostBack && !CheckRefreshFlag())
	 {
	 log.Debug("刷新了页面");
	 return true;
	 }
	 else
	 {
	 log.Debug("正常提交");
	 return false;
	 }
	 }
	 }

	 /// <summary>
	 /// 呈现前更新标识
	 /// </summary>
	 /// <param name="e"></param>
	 protected override void OnPreRender(EventArgs e)
	 {
	 log.Debug("执行OnPreRender");
	 base.OnPreRender(e);
	 UpdateRefreshFlag();
	 }

	
	 /// <summary>
	 /// 更新标识,正常提交都删除该次提交的时间,并生产当前新的时间
	 /// </summary>
	 private void UpdateRefreshFlag()
	 {

	 #region Cookie模式

	 //注册页面唯一标识并返回
	 string pageGuid = SetCurPageGuid();

	 HttpCookie cookie = GetRefreshTicket();
	
	 if (cookie.Values.Count > 0)
	 {
	 cookie.Values.Remove(pageGuid);
	 log.Debug("当前清除的cookie变是:" + pageGuid);
	 }

	 string submitTime = DateTime.Now.ToString("hhmmss.fffff");
	 //当前提交时间保存到隐藏域
	 ClientScript.RegisterHiddenField(HIDDEN_FIELD_NAME, submitTime);

	
	 log.Debug("即将要新增的时间:submitTime:" + submitTime + " Guid:" + pageGuid.ToString());
	 cookie.Values.Add(pageGuid, submitTime);

	 log.Debug("UpdateRefreshFlag中当前Cookie中存在的记录数为:" + cookie.Values.Count);
	 for (int i = 0; i < cookie.Values.Count; i++)
	 log.Info("cookie[" + cookie.Values.GetKey(i) + "]:" + cookie.Values[i]);

	 Response.AppendCookie(cookie);

	 #endregion

	 }

	
	 /// <summary>
	 /// 验证是否刷新
	 /// </summary>
	 /// <returns></returns>
	 private bool CheckRefreshFlag()
	 {
	 HttpCookie cookie = GetRefreshTicket();
	 string pageGuid = GetCurPageGuid();
	 if (cookie.Values.Count > 0)
	 {
	 bool flag;
	 if (cookie.Values[pageGuid] != null)
	 flag = cookie.Values[pageGuid].IndexOf(GetCurSubmitTime()) > -1;
	 else
	 flag = true;//防止出现异常,总是可以提交
	 if (flag)
	 log.Debug("提交时间存在,可以提交");
	 else
	 log.Debug("无效的提交时间");
	 return flag;
	 }
	 return true;
	 }

	
	 /// <summary>
	 /// 得到已保存的提交时间,没有新建,有返回
	 /// </summary>
	 /// <returns></returns>
	 private HttpCookie GetRefreshTicket()
	 {
	 #region Cookie模式,返回值为Cookie

	 HttpCookie cookie;
	 if (Request.Cookies[REFRESH_TICKET_NAME] == null)
	 {
	 cookie = new HttpCookie(REFRESH_TICKET_NAME);
	 Response.AppendCookie(cookie);
	 log.Debug("Cookie不存在，初始化");
	 }
	 else
	 {
	 cookie = Request.Cookies[REFRESH_TICKET_NAME];

	 log.Debug("读取已存在的Cookie,当前Cookie中存在的记录数为:" + cookie.Values.Count + "具体有如下几条:");

	 for (int i = 0; i < cookie.Values.Count; i++)
	 log.Info("cookie[" + cookie.Values.GetKey(i) + "]:" + cookie.Values[i]);
	 }
	 return cookie;
	 #endregion
	 }

	
	 /// <summary>
	 /// 获取当前提交时间
	 /// </summary>
	 /// <returns></returns>
	 private string GetCurSubmitTime()
	 {
	 string submitTime = Request.Params[HIDDEN_FIELD_NAME] == null ? "" : Request.Params[HIDDEN_FIELD_NAME].ToString();
	 log.Debug("执行GetCurSubmitTime:submitTime为:" + submitTime);
	 return submitTime;
	 }

	
	 /// <summary>
	 /// 设置页面唯一标识,通过Guid标识来区分每个页面自己的提交时间
	 /// </summary>
	 private string SetCurPageGuid()
	 {
	 string guid;
	 if (!IsPostBack)
	 {
	 if (Request.Params[HIDDEN_PAGE_GUID] == null)
	 {
	 guid = System.Guid.NewGuid().ToString();
	 log.Debug("SetCurPageGuid注册了一个新的标识:" + guid);
	 }
	 else
	 guid = GetCurPageGuid();

	 }
	 else
	 {
	 guid = GetCurPageGuid();
	 }

	 ClientScript.RegisterHiddenField(HIDDEN_PAGE_GUID, guid);
	 return guid;
	 }

	

	 /// <summary>
	 /// 得到当前页面的唯一标识
	 /// </summary>
	 /// <returns></returns>
	 private string GetCurPageGuid()
	 {
	 string pageGuid = Request.Params[HIDDEN_PAGE_GUID] == null ? "none" : Request.Params[HIDDEN_PAGE_GUID].ToString();
	 log.Debug("执行GetCurPageGuid()后Page_GUID为:" + pageGuid);
	 return pageGuid;
	 }

	需要刷新判断功能时新页面只需继承该类就可,通过引用属性IsPageRefreshed识别"为真表示刷新,假则是正常提交",将数据库的操作写在
	if(!IsPageRefreshed)
	{
	 数据库操作
	}

	

	第二种方法：
	protected void Page_Load(object sender, EventArgs e)
	 {
	
	 //sb保存的是JavaScript脚本代码,点击提交按钮时执行该脚本
	 StringBuilder sb = new StringBuilder();
	 //保证验证函数的执行
	 sb.Append("if (typeof(Page_ClientValidate) == 'function') { if (Page_ClientValidate() == false) { return false; }};");
	 //点击提交按钮后设置Button的disable属性防止用户再次点击,注意这里的this是JavaScript代码
	 sb.Append("this.disabled = true;");
	 //用__doPostBack来提交，保证按钮的服务器端click事件执行
	 sb.Append(this.ClientScript.GetPostBackEventReference(this.btnSubmit, ""));
	 sb.Append(";");
	 //SetUIStyle()是JavaScript函数,点击提交按钮后执行,如可以显示动画效果提示后台处理进度
	 //注意SetUIStyle()定义在aspx页面中
	 sb.Append("SetUIStyle();");
	 //给提交按钮增加OnClick属性
	 this.btnSubmit.Attributes.Add("onclick", sb.ToString());
	
	 }

	 protected void btnSubmit_Click(object sender, EventArgs e)
	 {
	 //模拟长时间提交
	 System.Threading.Thread.Sleep(3000);
	 }
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　重复提交　
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