Drop down stays selected

You always see Select Box (Drop down) in Biz Web Apps. Sometimes stand alone, and sometimes in a list.

And Select box usually consists of three values.

(A) and (B) is sometimes together. And you always need (C) in order to the select box stays selected when the page is refreshed.

For example, if you submit a form, without doing anything, the select box will be empty and selected value will be GONE!!!! It will happen every time you refresh a page.

Select box stand alone case:

<form:select path="rtrnTpCd" id="tpCd" onchange="onChangeTp();" style="height:25px; width:200px">
   <form:option value="" label="--- Select Type ---"/>
   <c:forEach items="${TP_LIST}" var="name">
      <c:choose>
         <c:when test="${name.getRtrnTpCd()== TP_SELECTED}">
            <form:option value="${name.getRtrnTpCd()}" selected="true">${name.getRtrnTpNm()}</form:option>
         </c:when>
         <c:otherwise>
            <form:option value="${name.getRtrnTpCd()}">${name.getRtrnTpNm()}</form:option>
         </c:otherwise>
      </c:choose>
   </c:forEach>
</form:select>

@RequestMapping(value = "/onChangeTpCdRsnMain01")
public @ResponseBody List<RtrnRsnModel> refreshRsn(@RequestParam(value = "tpCd") String rtrnTpCd, Model model, HttpServletRequest req) {

	List<RtrnRsnModel> hdrStsList = RsnBL.getRsnsBoundTp(rtrnTpCd);
	model.addAttribute("rtrnTpCd", rtrnTpCd);
	req.getSession().setAttribute(CONST.TP_SELECTED.getVal(), rtrnTpCd);
	return hdrStsList;
}

“TP_SELECTED” is being set in the method “refreshRsn” in the Controller class, and the select box is being selected and stays with the value

Select Box in a list:

<c:forEach items="${rmaLineListModel.rmaLineModelList}" var="rmaLnObj" varStatus="i" begin="0">
.
.
.
<c:choose>
	<c:when test="${rmaLnObj.getRmaLineStsCd()== ''}">
		<form:select 
			path="rmaLineModelList[${i.index}].rmaLineStsCd" 
			id="idLnStCd${i.index}" 
			style="height:25px; width:130px">
		<form:option  value="" label=""/>
		<form:options items="${HDR_STS_LIST}" itemValue="rmaHdrStsCd" itemLabel="rmaHdrStsNm"/>
		</form:select>
	</c:when>
	<c:otherwise>
		<form:select 
			path="rmaLineModelList[${i.index}].rmaLineStsCd"
			items="${HDR_STS_LIST}" 
			id="idLnStCd${i.index}"
			itemLabel="rmaHdrStsNm" 
			itemValue="rmaHdrStsCd" 
			delimiter=" " 
			readonly="true" 
			disabled="true" 
			style="height:25px; width:130px"/>
		<form:hidden path="rmaLineModelList[${i.index}].rmaLineStsCd" id="idLnStCd${i.index}" />
	</c:otherwise>
</c:choose>

</c:forEach>

At line 7 to 13, selected value is NOT specified, whereas line 16 to 25 specified.

@RequestMapping("/cUrlValSubLine01Jsp/{rmaNum}")
public ModelAndView goToSubLine01Jsp(@PathVariable("rmaNum") String rmaNum,	Model model, HttpServletRequest req) {
	List<RmaLineModel> rmaLineModelList = RmaDtlBL.getRmaLineListWithCdTblNm(rmaNum, null);
	return getMVSubLine01(rmaNum, rmaLineModelList, req);
}

The controller that create the list of select box.

private ModelAndView getMVSubLine01(String rmaNum, List<RmaLineModel> rmaLinsList, HttpServletRequest req) {

	RmaLineListModel newModel = new RmaLineListModel(rmaNum, rmaLinsList);

	ModelAndView modelAndView = new ModelAndView(VIEW.SUB_LINE_01.getVal());
	modelAndView.addObject(CONST.FORM_KEY.getVal(), newModel);
	// For item detail list
	modelAndView.addObject(CONST.LINE_LIST_MODEL.getVal(), newModel);
	// Setup Status drop down line the item list
	modelAndView.addObject(CONST.HDR_STS_LIST.getVal(), getList(CONST.HDR_STS_LIST.getVal()));
	// Item list for AJAX Auto complete
	req.getSession().setAttribute(CONST.MDSE_LIST.getVal(), getList(CONST.MDSE_LIST.getVal()));
	return modelAndView;
}

The line 10 specify the select box object.

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Select Box Stays Selected