[英]How to get select option value from javascript to jsp
我的 html 有一個選擇選項值框,如果我從該框中選擇任何選項,我將在 javascript 中獲取值,但我希望在 jsp 中使用此值,因為使用此字符串我正在顯示從數據庫中選擇的行,我也嘗試過 request.getparameter但沒有工作代碼:
<script type="text/javascript">
function getAppId()
{
var value=document.getElementById("planeselect").value;
document.getElementById("demo").innerHTML="application Id:"+value;
}
</script>
<select id="planeselect" onchange="getAppId()">
<%
Set<String> set=appsList.keySet();
for (String s:set) {
String appName = (String) appsList.get(s);
%>
<option value="<%=s%>"><%=appName%></option>
<%
}
%>
</select>
在更改時,您可以加載頁面並使用request.getParameter()
<script type="text/javascript">
function getAppId()
{
var value=document.getElementById("planeselect").value;
document.getElementById("demo").innerHTML="application Id:"+value;
window.location="URL_of_this_page?RequiredValue="+value;
}
</script>
<%
String ValueRequired=request.getParameter("RequiredValue");
if(ValueRequired!=null){
*****operation which you want to perform*****
}
%>
<select id="planeselect" onchange="getAppId()">
<%
Set<String> set=appsList.keySet();
for (String s:set) {
String appName = (String) appsList.get(s);
%>
<option value="<%=s%>"><%=appName%></option>
<%
}
%>
</select>
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