常用非空判断及获取控件的值

1.文本框

var keepMan = $("#<%=hiKeepManID.ClientID %>").val();if (keepMan == '') {            alert("请选择发票保管人");            return;        }

2. 下拉框 dropdownlist

 if (document.getElementById("<%=ddlInvoiceType.ClientID %>").selectedIndex == 0) {            alert("请选择发票类型");            return;        }

var pressureLevel = $("#<%=ddlRollLevel.ClientID %>").val();    获取下拉框的选定值

var pressureLevel = $("#<%=ddlRollLevel.ClientID %>").find("option:selected").text();   获取下拉框的选定项文本内容

 

3.选择框 checkboxlist

 function getRadlValue(radl) {        var selectVal = "";        $("#" + radl + " input").each(function() {            if ($(this)[0].checked) {                selectVal = $(this).val();                return false;            }        });        return selectVal;    }

 

 var invoiceType = getRadlValue("<%=rbtnInvoiceType.ClientID %>");