javascript - 将我的 jquery 与 onclick 事件混合，该事件也与 SelectedIndexChanged 事件相关

Question

问题是没有发生回发。我注意到，如果我返回 true，情况就不会是这样..但是有不确定的结果，所以我不知所措。任何帮助表示赞赏!

          <DropDownList ID="ddlS1" runat="server" onclick = "checkHighDegreeCompliance(this, 1);" SelectedIndexChanged = "ddlS1_SelectedIndexChanged" AutoPostBack="true" >

这是加载后实际页面上的标记

<select name="rptrSection1$ctl00$rptrSection2$ctl00$ddlS2" class="DDLSelector2 SDropDown IsNormal" id="rptrSection1_ctl00_rptrSection2_ctl00_ddlS2" style="width: 200px;" onchange="checkHighDegreeCompliance(this, 2);setTimeout('__doPostBack(\'rptrSection1$ctl00$rptrSection2$ctl00$ddlS2\',\'\')', 0)">

这是 JavaScript

function checkHighDegreeCompliance(obj, sectionNum)
{
var parDdl = $(obj);
var parCompLev = parDdl.attr('selectedIndex');
var pnlDiv = parDdl.parents('.Section');
var ddls = pnlDiv.find('.DDLSelector' + (sectionNum + 1));
ddls.each(function ()
{
    var childDDL = $(this);
    var childComLev = childDDL.attr('selectedIndex');
    if (childComLev > parCompLev)
    {
        parDdl.attr('selectedIndex', childComLev);
    }
    if (sectionNum < 4)
    {
        checkHighDegreeCompliance(childDDL, ++sectionNum);
    }
});
}

Answer 1

尝试在 onclick 事件之前使用 return 关键字

 <DropDownList ID="ddlS1" runat="server" onclick = "return checkHighDegreeCompliance(this, 1);" SelectedIndexChanged = "ddlS1_SelectedIndexChanged" AutoPostBack="true" >

如果它不起作用，请告诉我。