extjs动态添加列

可以根据日期，动态的插入一列

controller层：

 1 StdDayWordQuery:function(btn,event){        
 2         var form=Ext.getCmp('queryFormSDW');
 3         paramsForDayWord=Ext.encode(form.getForm().getValues());     
 4         Ext.Ajax.request({                     
 5             url:'getDailyWordNum.action',
 6             headers: {
 7                 'Content-Type': 'application/json'
 8             },            
 9             params :paramsForDayWord,
10             async:false,
11             success:function(response) {                
12                 var results=Ext.decode(response.responseText);
13                     if(results.success){                    
14                     var rows = results.rows;
15                     var header = results.header;
16                     var cols = new Array();
17                     cols.push(new Ext.grid.RowNumberer({
18                             xtype:'rownumberer',
19                             text:'序号',
20                             flex:1,
21                             align:'center'
22                     }));        
23                     for(var x in header){                    
24                         cols.push(new Ext.grid.column.Column({
25                             text: header[x],
26                             dataIndex : header[x],
27                             flex:1,
28                             align:'center'
29                         }));
30                     }
31                     var store = new Ext.data.Store({
32                         fields: header,
33                         data: rows
34                     });
35                     var grid = Ext.getCmp('StudentDayWordGrid');
36                     grid.reconfigure(store,cols);
37                     Ext.getCmp('StudentDayWordGrid').show();
38                 }
39                 else{                
40                     Ext.Msg.alert("错误", results.msg);
41                     paramsForDayWord="";
42                     Ext.getCmp('StudentDayWordGrid').hide();                    
43                 }
44             } 
45         });
46     },

view层：

 1 Ext.define('ExtApp.view.StudentDayWord', {
 2     extend : 'Ext.panel.Panel',
 3     xtype : 'StudentDayWord',
 4     overflowY:'auto',
 5     fieldDefaults: {
 6         labelAlign: 'left',
 7         msgTarget: 'side'
 8     },
 9     layout: {
10         type:'vbox',
11         align:'stretch'
12     },
13     border:false,    
14     items:[{
15         height:40,        
16         border:false,        
17         items:[{
18             xtype:'form',            
19             height:40,            
20             id:'queryFormSDW',
21             '100%',            
22             items:[{
23                 xtype:'container',
24                 padding:5,            
25                 layout:{
26                     type:'hbox'
27                 },
28                 items:[{             
29                     labelWidth:60,
30                      200,
31                     labelAlign:'right',
32                     xtype:'combo',
33                     fieldLabel:'选择年级',
34                     name:'gradeCode',            
35                     id : 'cobStdDayWordGradeCode',
36                     store : 'Grade',                
37                     valueField : 'gradeCode',
38                     displayField : 'gradeName',                
39                     editable : false,
40                     emptyText : '请选年级',
41                     queryMode : 'local'                    
42                    },{
43                     xtype : 'textfield',                            
44                     labelSeparator:':',
45                     labelWidth : 150,
46                      300,
47                     labelAlign : 'right',                
48                     name:'userNameORuserCode',
49                     fieldLabel : '输入学生ID或学生姓名'    
50                 },{
51                     xtype:'datefield',
52                     labelWidth :60,
53                      200,
54                     fieldLabel:'起止日期:',
55                     id:'startDate',
56                     labelAlign : 'right',
57                     name:'startDate',
58                     format:'Y-m-d'
59                 },{
60                     xtype:'datefield',
61                     labelWidth :20,
62                      160,
63                     fieldLabel:'  至 ',
64                     labelAlign : 'right',
65                     id:'endDate',
66                     labelSeparator:' ',
67                     name:'endDate',
68                     format:'Y-m-d'
69                 },{
70                     xtype : 'button',                    
71                     80,
72                     margin:'0 10 0 10',
73                     id : 'btnStdDayWordQuery',
74                     text : '查询'
75                 },{
76                     xtype : 'button',
77                     80,
78                     id : 'btnStdDayWordReset',
79                     text : '重置'
80                 },{
81                     xtype : 'button',
82                     80,
83                     margin:'0 10 0 10',
84                     id : 'btnStdDayWordToExcel',
85                     text : '导出Excel'                
86                 }]
87             }]
88         }]
89     },{
90         xtype:'grid',
91         hidden:true,
92         columnLines:true,
93         cls:'custom-grid',
94         id : 'StudentDayWordGrid',
95         columns : []        
96     }]    
97 });
98

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原文地址：https://www.cnblogs.com/shipskunkun/p/4595841.html