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.