ASP.Net 1.x的client side postback script是这样的: <!-- function __doPostBack(eventTarget, eventArgument) { var theform; if (window.navigator.appName.toLowerCase().indexOf("netscape") > -1) { theform = document.forms["Form1"]; } else { theform = document.Form1; } theform.__EVENTTARGET.value = eventTarget.split("$").join(":"); theform.__EVENTARGUMENT.value = eventArgument; theform.submit(); } // -->
它是通过form.submit()去submit的。这样就有一个问题,form.onsubmit事件不会被触发,这么一来可能有些client side validation script就被绕过了。在ASP.Net 2.0里,这个问题被fix了。对于ASP.Net 1.x,据我所知,SP1也没有解决这个问题。我们可以使用下面的代码解决这个问题:
string myDoPostBack = @" <script language=""javascript""> <!-- function __myDoPostBack(eventTarget, eventArgument) { var theform; if (window.navigator.appName.toLowerCase().indexOf(""netscape"") > -1) { theform = document.forms[""Form1""]; } else { theform = document.Form1; } theform.__EVENTTARGET.value = eventTarget.split(""$"").join("":""); theform.__EVENTARGUMENT.value = eventArgument; if ((typeof(theform.onsubmit) == ""function"") && theform.onsubmit()!=false) { theform.submit(); } } __doPostBack = __myDoPostBack // --> </script>"; RegisterStartupScript("myDoPostBack", myDoPostBack);
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