Ext Grid数据导出到excel

目前，写了一个将Grid的数据，导出到EXCEL的简单应用，本文中的一些常量，来自我的前一篇：《JS中，操作EXCEL时，常用的常量定义》，本代码需要EXT2.1支持，以下是具体代码实现：

excel_app.js:

1. /**
2.  * 
3.  * Microsoft Excel 应用，导出功能
4.  * @author 张尧伟 zhangyw@icss.com.cn
5.  */
6. Ext.namespace("Ext.icss");
7. Ext.icss.ExcelApp = function() {
9.     return {
10.         excelApp :  null,
11.         EXCEL_APP : "Excel.Application",
12.         /**
13.          * 创建Excel应用程序对象
14.          * @param visible{} true or false 表示主程序窗口对象是否可见
15.          * @param displayAlerts{} true or false 如果不想在宏运行时被无穷无尽的提示和警告消息所困扰，
16.          * 请将本属性设置为 False；这样每次出现需用户应答的消息时，Microsoft Excel 将选择默认应答。
17.          * @return Application 对象
18.          */
19.         createApp : function(visible, displayAlerts) {
21.             if (!this.excelApp) {
22.                 this.excelApp = new ActiveXObject(this.EXCEL_APP);
23.             }
24.             if (this.excelApp) {
25.                 this.excelApp.Visible = visible;
26.                 this.excelApp.DisplayAlerts = displayAlerts;
27.             }
29.             return this.excelApp;
30.         },
32.         /**
33.          * 关闭指定的应用程序对象
34.          * @param exApp 需要关闭的EXCEL应用程序对象
35.          */
36.         closeApp : function(exApp) {
37.             if (exApp) {
38.                 exApp.Quit();
39.             }
40.         },
42.         /**
43.          * 在指定的应用程序对象中，创建一个新的工作簿
44.          * @param exApp EXCEL应用程序对象
45.          * @return Workbook 对象
46.          */
47.         addWorkbook : function(exApp) {
48.             if (!exApp) {
49.                 return;
50.             }
52.             var workbook = exApp.Workbooks.Add();
53.             if (workbook) {
54.                 workbook.Activate();
55.             }
56.             return workbook;
57.         },
59.         /**
60.          * 在指定的workbook对象中，查找索引为index的工作表对象
61.          * @param workbook Workbook 对象
62.          * @param index 工作表的索引
63.          * @return Worksheet 对象
64.          */
65.         findWorksheet : function(workbook, index) {
66.             var worksheet = null;
67.             if (index) {
68.                 worksheet = workbook.Worksheets(index);
69.             } else {
70.                 worksheet = workbook.ActiveSheet;
71.             }
73.             return worksheet;
74.         },
75.         /**
76.          * 设置指定的单元格值
77.          * @param cell 单元格对象，取Worksheet.Cells属性 
78.          * @param row cell的行
79.          * @param col cell的列
80.          * @param value 值
81.          */
82.         setCellValue:function(cell,row,col,value){
83.             cell(row,col).Value = value;
84.         },
86.         /**
87.          * 返回一个指定开始与结束表格的Range对象
88.          * @param worksheet Worksheet对象
89.          * @param startCell eg. cell(1,1)
90.          * @param endCell eg. cell(10,1)
91.          * @return Range对象
92.          */
93.         getRange:function(worksheet,startCell,endCell){
94.             return worksheet.Range(startCell, endCell);
95.         },
96.         
97.         printPreview : function() {
98.             var visible = this.excelApp.Visible;
99.             if (this.excelApp.ActiveSheet) {
101.                 if (false == visible) {
102.                     this.excelApp.Visible = true;
103.                 }
104.                 this.excelApp.ActiveSheet.PrintPreview();
106.                 this.excelApp.Visible = visible;
107.             }
108.         },
110.         printOut : function() {
111.             if (this.excelApp.ActiveSheet) {
113.                 this.excelApp.ActiveSheet.PrintOut();
114.             }
116.         },
118.         close : function() {
119.             this.closeApp(this.excelApp);
120.             this.excelApp = null;
121.         },
122.         
123.         getWorksheet:function(index){
124.             if(!this.excelApp){
125.                 this.createApp(true,false);
126.             }
127.             
128.             var workbook = null;
129.             if(!this.excelApp.ActiveWorkbook){
130.                 workbook = this.addWorkbook(this.excelApp);
131.             }
132.             return this.findWorksheet(workbook,index);
133.             
134.         }
135.     };
136. }();
138. ExcelApp = Ext.icss.ExcelApp;
140. //excel.js:
141. 1. /**
     2.  * @include "../js/Ext2.1/icss/excel/excel_const.js"
     3.  * @include "../js/Ext2.1/icss/excel/excel_app.js"
     4.  */
     5. Ext.namespace("Ext.icss");
     6. /**
     7.  * 数据工具类的基类
     8.  * @author 张尧伟 zhangyw@icss.com.cn
     9.  * @param {} config
     10.  */
     11. Ext.icss.DataTool = function(config) {
     12.     config = config || {};
     13.     this.initialConfig = config;
     14.     Ext.icss.DataTool.superclass.constructor.call(this);
     15. };
     17. Ext.extend(Ext.icss.DataTool,Ext.util.Observable, {
     19. });
     21. /**
     22.  * 数据工具类，此类主要实现将表格数据导出到Microsoft Excel功能
     23.  * @param {} config
     24.  */
     25. Ext.icss.Data2ExcelTool = function(config) {
     26.     config = config || {};
     27.     this.excelApp = Ext.icss.ExcelApp;
     28.     Ext.icss.Data2ExcelTool.superclass.constructor.call(this);
     29. };
     30. Ext.extend(Ext.icss.Data2ExcelTool,Ext.icss.DataTool,{
     31.     
     32.     export2Excel:function(grid,filename){
     33.             this.excelApp.close();
     34.             var worksheet = this.excelApp.getWorksheet(1);
     35.             /*
     36.             var worksheet = {};
     37.             worksheet.Cells = {};
     38.             */
     39.             var cells = this.fillWorksheet(worksheet,grid,filename);
     40.     },
     41.     fillWorksheet : function(worksheet,grid,filename) {
     42.             var cells = worksheet.Cells;
     43.             
     44.             var cm = grid.getColumnModel();
     45.             var ds = grid.getStore();
     46.             
     47.             var cols = cm. getColumnCount();
     48.             var rows = ds.getCount();
     49.             
     50.             this.buildHeader(grid,cells,1,1);
     51.             this.buildSumRow(grid,cells,2,1);
     52.             this.buildBody(grid,cells,3,1);
     53.             
     54.             rows += 2;
     55.             
     56.             worksheet.Range(cells(1, 1), cells(rows,cols)).Borders.LineStyle = Excel.XlBorderWeight.xlHairline;
     57.             worksheet.Range(cells(2, 1), cells(2,cols)).Font.Bold = Excel.XlBoolean.True;
     58.             worksheet.Range(cells(1, 1), cells(rows,cols)).Columns.AutoFit();
     59.             
     60.             return cells;
     61.     },
     62.     /**
     63.      * 根据grid的cm，生成表格表头
     64.      * @param {} grid
     65.      * @param {} cells excel cell对象
     66.      * @param {} row 开始行
     67.      * @param {} col 开始列
     68.      */
     69.     
     70.     buildHeader:function(grid,cells,row,col){
     71.         var cm = grid.getColumnModel();
     72.         var cfg = null;
     73.         for(var i=0; i<cm.config.length; ++i){
     74.             cfg = cm.config[i];
     75.             if(cfg.id == 'checker')
     76.             {
     77.                 this.excelApp.setCellValue(cells,row,col+i,'');
     78.             }else{
     79.                 this.excelApp.setCellValue(cells,row,col+i,cfg.header);
     80.             }
     81.         }       
     82.     },
     83.     /**
     84.      * 根据GRID的store,导出数据
     85.      * @param {} grid
     86.      * @param {} cells
     87.      * @param {} row
     88.      * @param {} col
     89.      */
     90.     buildBody : function(grid, cells, row, col) {
     91.         var cm = grid.getColumnModel();
     92.         var ds = grid.getStore();
     94.         var cfg = null;
     95.         ds.each(function(rec) {
     96.             
     97.             for (var i = 0; i < cm.config.length; ++i) {
     98.                 cfg = cm.config[i];
     99.                 if (cfg.id == 'checker') {
     100.                     this.excelApp.setCellValue(cells, row, col + i, '');
     101.                 } else {
     102.                     var val = rec.get(cfg.dataIndex);
     103.                     if(cfg.renderer){
     104.                         val = cfg.renderer(val);
     105.                     }
     106.                     if(val){
     107.                         this.excelApp.setCellValue(cells, row, col + i, val );      
     108.                     }                   
     109.                     
     110.                 }
     111.             }
     112.             row++;
     113.         },this);
     114.     },
     115.     
     116.     /**
     117.      * 增加合计行
     118.      * @param {} grid
     119.      * @param {} cells
     120.      * @param {} row
     121.      * @param {} col
     122.      */
     123.     buildSumRow:function(grid,cells,row,col){       
     124.         var cm = grid.getColumnModel();
     125.         var cfg = null;
     126.         for (var i = 0; i < cm.config.length; ++i) {
     127.             cfg = cm.config[i];
     128.             if(cfg.sumcaption){
     129.                 this.excelApp.setCellValue(cells,row,col+i,cfg.sumcaption);
     130.             }
     131.             
     132.             if(cfg.sumvalue){
     133.                 this.excelApp.setCellValue(cells,row,col+i,cfg.sumvalue);
     134.             }
     135.         }
     136.     }
     137.     
     138. });

     调用示例：

142. 2. /**
     3.  * 将表格的数据导出到Excel文件
     4.  * @param {} btn
     5.  * @param {} event
     6.  */
     7. function export2Excel(btn,event)
     8. {
     9.     var filename = '预计划';
     10.     var data2Excel = new Ext.icss.Data2ExcelTool();
     11.     data2Excel.export2Excel(getGrid(),filename);
     12.     //var ExcelApp.export2Excel(getGrid(),filename);
     13. }