原文：Converting an Ext 5 Grid to Excel Spreadsheet
稍微迟来的礼物——Ext JS Grid转为Excel代码，现在支持Ext JS 5！
功能包括：
- 支持分组
- 数字的处理 VS 字符串数据类型
- 对于不支持客户端下载的浏览器会提交回服务器
Enjoy！
/*
Excel.js - convert an ExtJS 5 grid into an Excel spreadsheet using nothing but
javascript and good intentions.
By: Steve Drucker
Dec 26, 2014
Original Ext 3 Implementation by: Nige "Animal" White?
Contact Info:
e. sdrucker@figleaf.com
blog: druckit.wordpress.com
linkedin: www.linkedin.com/in/uberfig
git: http://github.com/sdruckerfig
company: Fig Leaf Software (http://www.figleaf.com / http://training.figleaf.com)
Invocation: grid.downloadExcelXml(includeHiddenColumns,title)
Upgraded for ExtJS5 on Dec 26, 2014
*/
var Base64 = (function() {
// Private property
var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
// Private method for UTF-8 encoding
function utf8Encode(string) {
string = string.replace(/\r\n/g, "\n");
var utftext = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
} else if ((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
} else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
}
// Public method for encoding
return {
encode: (typeof btoa == 'function') ? function(input) {
return btoa(utf8Encode(input));
} : function(input) {
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
input = utf8Encode(input);
while (i < input.length) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output +
keyStr.charAt(enc1) + keyStr.charAt(enc2) +
keyStr.charAt(enc3) + keyStr.charAt(enc4);
}
return output;
}
};
})();
Ext.define('MyApp.overrides.view.Grid', {
override: 'Ext.grid.GridPanel',
requires: 'Ext.form.action.StandardSubmit',
/*
Kick off process
*/
downloadExcelXml: function(includeHidden, title) {
if (!title) title = this.title;
var vExportContent = this.getExcelXml(includeHidden, title);
/*
dynamically create and anchor tag to force download with suggested filename
note: download attribute is Google Chrome specific
*/
if (Ext.isChrome) {
var gridEl = this.getEl();
var location = 'data:application/vnd.ms-excel;base64,' + Base64.encode(vExportContent);
var el = Ext.DomHelper.append(gridEl, {
tag: "a",
download: title + "-" + Ext.Date.format(new Date(), 'Y-m-d Hi') + '.xls',
href: location
});
el.click();
Ext.fly(el).destroy();
} else {
var form = this.down('form#uploadForm');
if (form) {
form.destroy();
}
form = this.add({
xtype: 'form',
itemId: 'uploadForm',
hidden: true,
standardSubmit: true,
url: 'http://webapps.figleaf.com/dataservices/Excel.cfc?method=echo&mimetype=application/vnd.ms-excel&filename=' + escape(title + ".xls"),
items: [{
xtype: 'hiddenfield',
name: 'data',
value: vExportContent
}]
});
form.getForm().submit();
}
},
/*
Welcome to XML Hell
See: http://msdn.microsoft.com/en-us/library/office/aa140066(v=office.10).aspx
for more details
*/
getExcelXml: function(includeHidden, title) {
var theTitle = title || this.title;
var worksheet = this.createWorksheet(includeHidden, theTitle);
if (this.columnManager.columns) {
var totalWidth = this.columnManager.columns.length;
} else {
var totalWidth = this.columns.length;
}
return ''.concat(
'<?xml version="1.0"?>',
'<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:html="http://www.w3.org/TR/REC-html40">',
'<DocumentProperties xmlns="urn:schemas-microsoft-com:office:office"><Title>' + theTitle + '</Title></DocumentProperties>',
'<OfficeDocumentSettings xmlns="urn:schemas-microsoft-com:office:office"><AllowPNG/></OfficeDocumentSettings>',
'<ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">',
'<WindowHeight>' + worksheet.height + '</WindowHeight>',
'<WindowWidth>' + worksheet.width + '</WindowWidth>',
'<ProtectStructure>False</ProtectStructure>',
'<ProtectWindows>False</ProtectWindows>',
'</ExcelWorkbook>',
'<Styles>',
'<Style ss:ID="Default" ss:Name="Normal">',
'<Alignment ss:Vertical="Bottom"/>',
'<Borders/>',
'<Font ss:FontName="Calibri" x:Family="Swiss" ss:Size="12" ss:Color="#000000"/>',
'<Interior/>',
'<NumberFormat/>',
'<Protection/>',
'</Style>',
'<Style ss:ID="title">',
'<Borders />',
'<Font ss:Bold="1" ss:Size="18" />',
'<Alignment ss:Horizontal="Center" ss:Vertical="Center" ss:WrapText="1" />',
'<NumberFormat ss:Format="@" />',
'</Style>',
'<Style ss:ID="headercell">',
'<Font ss:Bold="1" ss:Size="10" />',
'<Alignment ss:Horizontal="Center" ss:WrapText="1" />',
'<Interior ss:Color="#A3C9F1" ss:Pattern="Solid" />',
'</Style>',
'<Style ss:ID="even">',
'<Interior ss:Color="#CCFFFF" ss:Pattern="Solid" />',
'</Style>',
'<Style ss:ID="evendate" ss:Parent="even">',
'<NumberFormat ss:Format="yyyy-mm-dd" />',
'</Style>',
'<Style ss:ID="evenint" ss:Parent="even">',
'<Numberformat ss:Format="0" />',
'</Style>',
'<Style ss:ID="evenfloat" ss:Parent="even">',
'<Numberformat ss:Format="0.00" />',
'</Style>',
'<Style ss:ID="odd">',
'<Interior ss:Color="#CCCCFF" ss:Pattern="Solid" />',
'</Style>',
'<Style ss:ID="groupSeparator">',
'<Interior ss:Color="#D3D3D3" ss:Pattern="Solid" />',
'</Style>',
'<Style ss:ID="odddate" ss:Parent="odd">',
'<NumberFormat ss:Format="yyyy-mm-dd" />',
'</Style>',
'<Style ss:ID="oddint" ss:Parent="odd">',
'<NumberFormat Format="0" />',
'</Style>',
'<Style ss:ID="oddfloat" ss:Parent="odd">',
'<NumberFormat Format="0.00" />',
'</Style>',
'</Styles>',
worksheet.xml,
'</Workbook>'
);
},
/*
Support function to return field info from store based on fieldname
*/
getModelField: function(fieldName) {
var fields = this.store.model.getFields();
for (var i = 0; i < fields.length; i++) {
if (fields[i].name === fieldName) {
return fields[i];
}
}
},
/*
Convert store into Excel Worksheet
*/
generateEmptyGroupRow: function(dataIndex, value, cellTypes, includeHidden) {
var cm = this.columnManager.columns;
var colCount = cm.length;
var rowTpl = '<Row ss:AutoFitHeight="0"><Cell ss:StyleID="groupSeparator" ss:MergeAcross="{0}"><Data ss:Type="String"><html:b>{1}</html:b></Data></Cell></Row>';
var visibleCols = 0;
// rowXml += '<Cell ss:StyleID="groupSeparator">'
for (var j = 0; j < colCount; j++) {
if (cm[j].xtype != 'actioncolumn' && (cm[j].dataIndex != '') && (includeHidden || !cm[j].hidden)) {
// rowXml += '<Cell ss:StyleID="groupSeparator"/>';
visibleCols++;
}
}
// rowXml += "</Row>";
return Ext.String.format(rowTpl, visibleCols - 1, Ext.String.htmlEncode(value));
},
createWorksheet: function(includeHidden, theTitle) {
// Calculate cell data types and extra class names which affect formatting
var cellType = [];
var cellTypeClass = [];
console.log(this);
if (this.columnManager.columns) {
var cm = this.columnManager.columns;
} else {
var cm = this.columns;
}
console.log(cm);
var colCount = cm.length;
var totalWidthInPixels = 0;
var colXml = '';
var headerXml = '';
var visibleColumnCountReduction = 0;
for (var i = 0; i < cm.length; i++) {
if (cm[i].xtype != 'actioncolumn' && (cm[i].dataIndex != '') && (includeHidden || !cm[i].hidden)) {
var w = cm[i].getEl().getWidth();
totalWidthInPixels += w;
if (cm[i].text === "") {
cellType.push("None");
cellTypeClass.push("");
++visibleColumnCountReduction;
} else {
colXml += '<Column ss:AutoFitWidth="1" ss:Width="' + w + '" />';
headerXml += '<Cell ss:StyleID="headercell">' +
'<Data ss:Type="String">' + cm[i].text.replace("<br>"," ") + '</Data>' +
'<NamedCell ss:Name="Print_Titles"></NamedCell></Cell>';
var fld = this.getModelField(cm[i].dataIndex);
switch (fld.$className) {
case "Ext.data.field.Integer":
cellType.push("Number");
cellTypeClass.push("int");
break;
case "Ext.data.field.Number":
cellType.push("Number");
cellTypeClass.push("float");
break;
case "Ext.data.field.Boolean":
cellType.push("String");
cellTypeClass.push("");
break;
case "Ext.data.field.Date":
cellType.push("DateTime");
cellTypeClass.push("date");
break;
default:
cellType.push("String");
cellTypeClass.push("");
break;
}
}
}
}
var visibleColumnCount = cellType.length - visibleColumnCountReduction;
var result = {
height: 9000,
width: Math.floor(totalWidthInPixels * 30) + 50
};
// Generate worksheet header details.
// determine number of rows
var numGridRows = this.store.getCount() + 2;
if ((this.store.groupField &&!Ext.isEmpty(this.store.groupField)) || (this.store.groupers && this.store.groupers.items.length > 0)) {
numGridRows = numGridRows + this.store.getGroups().length;
}
// create header for worksheet
var t = ''.concat(
'<Worksheet ss:Name="' + theTitle + '">',
'<Names>',
'<NamedRange ss:Name="Print_Titles" ss:RefersTo="=\'' + theTitle + '\'!R1:R2">',
'</NamedRange></Names>',
'<Table ss:ExpandedColumnCount="' + (visibleColumnCount + 2),
'" ss:ExpandedRowCount="' + numGridRows + '" x:FullColumns="1" x:FullRows="1" ss:DefaultColumnWidth="65" ss:DefaultRowHeight="15">',
colXml,
'<Row ss:Height="38">',
'<Cell ss:MergeAcross="' + (visibleColumnCount - 1) + '" ss:StyleID="title">',
'<Data ss:Type="String" xmlns:html="http://www.w3.org/TR/REC-html40">',
'<html:b>' + theTitle + '</html:b></Data><NamedCell ss:Name="Print_Titles">',
'</NamedCell></Cell>',
'</Row>',
'<Row ss:AutoFitHeight="1">',
headerXml +
'</Row>'
);
// Generate the data rows from the data in the Store
var groupVal = "";
var groupField = "";
if (this.store.groupers && this.store.groupers.keys.length > 0) {
groupField = this.store.groupers.keys[0];
} else if (this.store.groupField != '') {
groupField = this.store.groupField;
}
for (var i = 0, it = this.store.data.items, l = it.length; i < l; i++) {
if (!Ext.isEmpty(groupField)) {
if (groupVal != this.store.getAt(i).get(groupField)) {
groupVal = this.store.getAt(i).get(groupField);
t += this.generateEmptyGroupRow(groupField, groupVal, cellType, includeHidden);
}
}
t += '<Row>';
var cellClass = (i & 1) ? 'odd' : 'even';
r = it[i].data;
var k = 0;
for (var j = 0; j < colCount; j++) {
if (cm[j].xtype != 'actioncolumn' && (cm[j].dataIndex != '') && (includeHidden || !cm[j].hidden)) {
var v = r[cm[j].dataIndex];
if (cellType[k] !== "None") {
t += '<Cell ss:StyleID="' + cellClass + cellTypeClass[k] + '"><Data ss:Type="' + cellType[k] + '">';
if (cellType[k] == 'DateTime') {
t += Ext.Date.format(v, 'Y-m-d');
} else {
t += Ext.String.htmlEncode(v);
}
t += '</Data></Cell>';
}
k++;
}
}
t += '</Row>';
}
result.xml = t.concat(
'</Table>',
'<WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">',
'<PageLayoutZoom>0</PageLayoutZoom>',
'<Selected/>',
'<Panes>',
'<Pane>',
'<Number>3</Number>',
'<ActiveRow>2</ActiveRow>',
'</Pane>',
'</Panes>',
'<ProtectObjects>False</ProtectObjects>',
'<ProtectScenarios>False</ProtectScenarios>',
'</WorksheetOptions>',
'</Worksheet>'
);
return result;
}
});附：在原文底部有Ext JS 4版本的链接