System.ArgumentException: The postback or callback parameter is invalid when the Trigger button event appears in the Repeater control. Using < pages enableeventvalidation= "true" in configuration/>

Today, a button is added to the Repeater control, but you are prompted at execution

System.ArgumentException: The postback or callback parameter is invalid. Using < pages enableeventvalidation= "true" in configuration/>

 <asp:repeater id= "rplist" runat= "Server" onitemcommand= "Rplist_itemcommand" > <ItemTemplate>                        <div class= "article pic" id= ' <% #Eval ("SID")%> ' > 
Background code: [CommandArgument is the parameter commandname is the command name]
protected void Rplist_itemcommand (object source, RepeaterCommandEventArgs e)    {        if (e.commandname = =) Updatepass ")        {            string id = e.commandargument.tostring ();            Try            {                var vStu = from S in Ydtvu. Students                           where S.sid. ToString (). Trim () = = ID. ToString (). Trim ()                           select S;                Vstu.first (). Spass = Tomd5.getmd5hash ("123456"). ToString (). Trim ();                Ydtvu. SubmitChanges ();                Clientscript.registerstartupscript (this. GetType (), "failure", "$ (function () {Asyncbox.alert (' Congratulations, password initialization succeeded! Current password: 123456 ', ' Jiangsu rtvu Yandu College ');}) ", true);            }            catch (Exception exp)            {                Clientscript.registerstartupscript (this. GetType (), "failure", "$ (function () {Asyncbox.alert (' Sorry, password initialization failed, please try again later!") ', ' Jiangsu Rtvu University of Yandu ');}) ", true);}        }

However, a little button, the page has an error, the prompt postback or callback parameter is invalid. 
After finding the data, find the following methods:
Whether the page is useful on the data-bound control , if so, put the IF (! IsPostBack) {//bind} if not, you can set the enableeventvalidation property on the page to false
Place the binding event of the original repeater control on the if (! IsPostBack) {//bind} , the error is no longer prompted.
System.ArgumentException: The postback or callback parameter is invalid when the Trigger button event appears in the Repeater control. Using < pages enableeventvalidation= "true" in configuration/>