遇到的问题：

初始化时能正常打开上传，但点击查询后上传按钮失效

正确代码如下：


if(paramPage>0){var curr=paramPage;
}else{var curr = 1;
}
var pageSize = 10;
$(function() {find(curr);
})
function find(currs) {if(currs!=null){curr = currs;}var examType = $("#examType").val();var year = $("#year").val();var term = $("#term").val();$.ajax({url : ctx + "/ScoreRegistration/queryCourse",type : "post",data : {"pageNum" : curr,"pageSize" : pageSize,"year" : year,"term" : term,"examType":examType},dataType : "json",async : true,contentType : "application/x-www-form-urlencoded",success : function(result) {if(result.code!="-1"){$("#no_data").hide();$("#table_div").show();$("#t_body_class").html("");var courseList = result.data.list;for (var i = 0; i < courseList.length; i++) {var str = "";var inde = ((10*(curr-1))+i+1);str += "<tr><td>"+((10*(curr-1))+i+1)+"</td>"str += "<td>"+courseList[i].grade+"</td>";str += "<td title="+courseList[i].yearTerm+">"+courseList[i].yearTerm+"</td>";str += "<td title="+courseList[i].className+">"+courseList[i].className+"</td>";str += "<td title="+courseList[i].courseName+">"+courseList[i].courseName+"</td>";str += "<td title="+courseList[i].teacherName+">"+courseList[i].teacherName+"</td>";str += "<td title="+courseList[i].auditStatus+">"+courseList[i].auditStatus+"</td>";if(courseList[i].auditStatus=='未录入'){str += "<td>" +"<input type='button' value='录入' class='my-button' οnclick='typeIn("+courseList[i].grade+","+year+","+term+","+courseList[i].courseId+","+courseList[i].teacherId+","+courseList[i].classId+","+courseList[i].majorId+","+courseList[i].deptId+",\""+courseList[i].majorName+"\",\""+courseList[i].deptName+"\",\""+courseList[i].courseName+"\")'>" +"<button type='button' class='layui-btn layui-btn-primary' id='upload_excel_"+inde+"'><i class='layui-icon layui-icon-upload-circle'></i></button>";}else if(courseList[i].auditStatus=='录入中'){str += "<td>" +"<input type='button' value='录入' class='my-button' οnclick='typeIn("+courseList[i].grade+","+year+","+term+","+courseList[i].courseId+","+courseList[i].teacherId+","+courseList[i].classId+","+courseList[i].majorId+","+courseList[i].deptId+",\""+courseList[i].majorName+"\",\""+courseList[i].deptName+"\",\""+courseList[i].courseName+"\")'>"+"<input type='button' value='提交' class='my-button' οnclick='submitScoreAudit("+courseList[i].id+","+courseList[i].grade+","+year+","+term+","+courseList[i].courseId+","+courseList[i].teacherId+","+courseList[i].classId+","+courseList[i].majorId+","+courseList[i].deptId+")'>";}str+="</td></tr>";$("#t_body_class").append(str);loadLayerEL(inde,courseList[i].grade,year,term,courseList[i].courseId,courseList[i].teacherId,courseList[i].classId,courseList[i].majorId,courseList[i].deptId,courseList[i].majorName,courseList[i].deptName,courseList[i].courseName)}}else{$("#no_data").show();$("#table_div").hide();}layui.use(['laypage', 'layer'], function(){var laypage = layui.laypage,layer = layui.layer;laypage({cont:'demo7',pages : result.data.pages,skip : true,curr : curr,jump : function(obj, first) {newpage = obj.curr;if (!first) {find(newpage);}}});})}});
}
/*** 加载layer的依赖* @returns*/
var  files = null;
function loadLayerEL(inde,grade,year,term,courseId,teacherId,classId,majorId,deptId,majorName,deptName,courseName){var params = {"grade":grade,"year":year,"term":term,"courseId":courseId,"teacherId":teacherId,"classId":classId,"examType":examType,"majorId":majorId,"deptId":deptId,"page":curr
}layui.use(['element','upload','form'], function(){var element = layui.element;var $ = layui.jquery,upload = layui.upload;/*上传文件*/upload.render({ //允许上传的文件后缀elem: '#upload_excel_'+inde,url: ctx+'/ScoreRegistration/importScholarStudent',accept: 'file', //普通文件,data: params,auto:true,//是否自动上传exts: 'xls|xlsx', //只允许上传excel文件progress: function(n, elem){var percent = n + '%' //获取进度百分比element.progress('#upload_excel_'+inde, percent);console.log(elem); },done: function(res){//上传完成后回调deletefile();if(res.msg=="请求上传接口出现异常"){layer.msg("请检查上传表格中数据");return false;}else{layer.msg(res.msg,{time:5000});find(1);}},choose:function(obj){deletefile();//将每次选择的文件追加到文件队列files = obj.pushFile();}});});
}/*** 清除文件* @returns*/
function deletefile(){if(null != files){for(var i = 0 ; i<Object.keys(files).length;i++){delete  files[Object.keys(files)[i]];}files = null;}
}

分析错误代码：

$.ajax({url : ctx + "/ScoreRegistration/queryCourse",type : "post",data : {"pageNum" : curr,"pageSize" : pageSize,"year" : year,"term" : term,"examType":examType},dataType : "json",async : true,contentType : "application/x-www-form-urlencoded",success : function(result) {if(result.code!="-1"){$("#no_data").hide();var courseList = result.data.list;var str = "";for (var i = 0; i < courseList.length; i++) {var inde = ((10*(curr-1))+i+1);str += "<tr><td>"+((10*(curr-1))+i+1)+"</td>"str += "<td>"+courseList[i].grade+"</td>";str += "<td title="+courseList[i].yearTerm+">"+courseList[i].yearTerm+"</td>";str += "<td title="+courseList[i].className+">"+courseList[i].className+"</td>";str += "<td title="+courseList[i].courseName+">"+courseList[i].courseName+"</td>";str += "<td title="+courseList[i].teacherName+">"+courseList[i].teacherName+"</td>";str += "<td title="+courseList[i].auditStatus+">"+courseList[i].auditStatus+"</td>";if(courseList[i].auditStatus=='未录入'){str += "<td>" +"<input type='button' value='录入' class='my-button' οnclick='typeIn("+courseList[i].grade+","+year+","+term+","+courseList[i].courseId+","+courseList[i].teacherId+","+courseList[i].classId+","+courseList[i].majorId+","+courseList[i].deptId+",\""+courseList[i].majorName+"\",\""+courseList[i].deptName+"\",\""+courseList[i].courseName+"\")'>" +"<button type='button' class='layui-btn layui-btn-primary' id='upload_excel_"+inde+"'><i class='layui-icon layui-icon-upload-circle'></i></button>";}else if(courseList[i].auditStatus=='录入中'){str += "<td>" +"<input type='button' value='录入' class='my-button' οnclick='typeIn("+courseList[i].grade+","+year+","+term+","+courseList[i].courseId+","+courseList[i].teacherId+","+courseList[i].classId+","+courseList[i].majorId+","+courseList[i].deptId+",\""+courseList[i].majorName+"\",\""+courseList[i].deptName+"\",\""+courseList[i].courseName+"\")'>"+"<input type='button' value='提交' class='my-button' οnclick='submitScoreAudit("+courseList[i].id+","+courseList[i].grade+","+year+","+term+","+courseList[i].courseId+","+courseList[i].teacherId+","+courseList[i].classId+","+courseList[i].majorId+","+courseList[i].deptId+")'>";}else if(courseList[i].auditStatus=='已提交'){str += "<td>" +"<input type='button' value='取消提交' class='my-button' οnclick='disScoreAudit("+courseList[i].grade+","+year+","+term+","+courseList[i].courseId+","+courseList[i].teacherId+","+courseList[i].classId+","+courseList[i].majorId+","+courseList[i].deptId+")'>";str += "" +"<input type='button' value='打印' class='my-button' οnclick='printScore("+courseList[i].grade+","+year+","+term+","+courseList[i].courseId+","+courseList[i].teacherId+","+courseList[i].classId+","+courseList[i].majorId+","+courseList[i].deptId+","+courseList[i].id+",\""+courseList[i].majorName+"\",\""+courseList[i].deptName+"\",\""+courseList[i].courseName+"\",\""+courseList[i].className+"\",\""+courseList[i].teacherName+"\",\""+courseList[i].courseType+"\")'>";}else if(courseList[i].auditStatus=='未审核通过'){str += "<td>" +"<input type='button' value='提交' class='my-button' οnclick='submitScoreAudit("+courseList[i].id+","+courseList[i].grade+","+year+","+term+","+courseList[i].courseId+","+courseList[i].teacherId+","+courseList[i].classId+","+courseList[i].majorId+","+courseList[i].deptId+")'>";}else if(courseList[i].auditStatus=='已发布'){str += "<td>" +"<input type='button' value='打印' class='my-button' οnclick='printScore("+courseList[i].grade+","+year+","+term+","+courseList[i].courseId+","+courseList[i].teacherId+","+courseList[i].classId+","+courseList[i].majorId+","+courseList[i].deptId+","+courseList[i].id+",\""+courseList[i].majorName+"\",\""+courseList[i].deptName+"\",\""+courseList[i].courseName+"\",\""+courseList[i].className+"\",\""+courseList[i].teacherName+"\",\""+courseList[i].courseType+"\")'>";}str+="</td>";loadLayerEL(inde,courseList[i].grade,year,term,courseList[i].courseId,courseList[i].teacherId,courseList[i].classId,courseList[i].majorId,courseList[i].deptId,courseList[i].majorName,courseList[i].deptName,courseList[i].courseName)}$("#t_body_class").html(str);$("#table_div").show();}else{$("#no_data").show();$("#table_div").hide();}

代码是渲染页面在后，赋值调用loadLayerEL方法在前，但此时页面的这些值是没有给到的，直接调用上传按钮，此时是不起作用的，需要先给页面渲染，再去调用

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文件上传upload.render小记

upload.render失效

遇到的问题：

正确代码如下：

分析错误代码：

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