防止多次提交的几个比较

1、利用Session(viewState是不行的，viewState要回传才能读到数据)
如果有个数据包类StockBillMP，则设定
 

        private StockBillMP M_saveobj
        {
            get
            {
                return (Session["saveobj"] == null)?null:(StockBillMP)Session["saveobj"];
            }
            set
            {
                Session["saveobj"] = value;
            }
        }    

然后用比较函数
 

        private bool checkIsRepeate(StockBillMP objRet)
        {
            bool bret = true;  //假设是重复的，不重复就退出
            
            for(int i=1;i<objRet.objMainProc.arrParams.Length;i++)
            {
                string strOld = M_saveobj.objMainProc.arrParams[i].Value.ToString().Trim();
                string strNew = objRet.objMainProc.arrParams[i].Value.ToString().Trim();
                if (strOld != strNew)
                {
                    bret = false;
                    break;
                }
            }
            if (bret)
            {
                for(int i=0;i<objRet.arrSubProc.Length;i++)
                {
                    for(int j=1;j<objRet.arrSubProc[i].arrParams.Length;j++)
                    {
                        string strOld = M_saveobj.arrSubProc[i].arrParams[j].Value.ToString().Trim();
                        string strNew = objRet.arrSubProc[i].arrParams[j].Value.ToString().Trim();
                        if (strOld != strNew)
                        {
                            bret = false;
                            break;
                        }
                        bret = true;
                    }
                    if(!bret)
                        break;
                }
            }                                     
            
            return bret;
        }

保存成功就更改Session

M_saveobj = objRet;

代价是惨重的，效果还可以，整个包啊
当然仅仅是实现防止提交速度慢，连续点击的情况是设定一个bool变量就可以了，效果如2检查按钮。

2、检查按钮
http://bestcomy.cnblogs.com/archive/2005/10/10/251507.html

此处提供的代码用来实现当asp.net页面中的某个Button被点击后disable掉该页面中所有的Button，从而防止提交延时导致的多次提交。基于之前的onceclickbutton脚本.

<script language="javascript">
        <!--
        
        function disableOtherSubmit()
        {            var obj = event.srcElement;
            var objs = document.getElementsByTagName('INPUT');
            for(var i=0; i<objs.length; i++)
            {
                if(objs[i].type.toLowerCase() == 'submit')
                {
                    objs[i].disabled = true;
                }
            }        }
            
        //-->
        </script>

public class PreventMultiClick : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.Button Button1;
        protected System.Web.UI.WebControls.Button Button2;
        protected System.Web.UI.WebControls.LinkButton LinkButton1;
        protected System.Web.UI.WebControls.Button Button3;
    
        private void Page_Load(object sender, System.EventArgs e)
        {
            this.GetPostBackEventReference(this.Button3);        //保证 __doPostBack(eventTarget, eventArgument) 正确注册
            if(!IsPostBack)
            {
                System.Text.StringBuilder sb = new System.Text.StringBuilder();
                sb.Append("if (typeof(Page_ClientValidate) == 'function') { if (Page_ClientValidate() == false) { return false; }}");    //保证验证函数的执行
                sb.Append("if(window.confirm('are you sure?')==false) return false;");        //自定义客户端脚本
                sb.Append("disableOtherSubmit();");        // disable所有submit按钮
                sb.Append(this.GetPostBackEventReference(this.Button3));    //用__doPostBack来提交，保证按钮的服务器端click事件执行
                sb.Append(";");
                Button3.Attributes.Add("onclick",sb.ToString());
            }
        }

        #region Web Form Designer generated code
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: This call is required by the ASP.NET Web Form Designer.
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {    
            this.Button3.Click += new System.EventHandler(this.Button3_Click);
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion

        private void Button3_Click(object sender, System.EventArgs e)
        {
            System.Threading.Thread.Sleep(3000);
            Response.Write("Hello world!");
        }
    }

此处只是disable掉所有的submit button, 我觉得其它的可提交控件也是可以通过类似的方法来disable的.