xsheetjs/demos/angular/README.md

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# AngularJS
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The `xlsx.core.min.js` and `xlsx.full.min.js` scripts are designed to be dropped
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into web pages with script tags:
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```html
<script src="xlsx.full.min.js"></script>
```
Strictly speaking, there should be no need for an Angular demo! You can proceed
as you would with any other browser-friendly library.
## Array of Objects
A common data table is often stored as an array of objects:
```js
$scope.data = [
{ Name: "Bill Clinton", Index: 42 },
{ Name: "GeorgeW Bush", Index: 43 },
{ Name: "Barack Obama", Index: 44 },
{ Name: "Donald Trump", Index: 45 }
];
```
This neatly maps to a table with `ng-repeat`:
```html
<table id="sjs-table">
<tr><th>Name</th><th>Index</th></tr>
<tr ng-repeat="row in data">
<td>{{row.Name}}</td>
<td>{{row.Index}}</td>
</tr>
</table>
```
The `$http` service can request binary data using the `"arraybuffer"` response
type coupled with `XLSX.read` with type `"array"`:
```js
$http({
method:'GET',
url:'https://sheetjs.com/pres.xlsx',
responseType:'arraybuffer'
}).then(function(data) {
var wb = XLSX.read(data.data, {type:"array"});
var d = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]);
$scope.data = d;
}, function(err) { console.log(err); });
```
The HTML table can be directly exported with `XLSX.utils.table_to_book`:
```js
var wb = XLSX.utils.table_to_book(document.getElementById('sjs-table'));
XLSX.writeFile(wb, "export.xlsx");
```
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## Import Directive
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A general import directive is fairly straightforward:
- Define the `importSheetJs` directive in the app:
```js
app.directive("importSheetJs", [SheetJSImportDirective]);
```
- Add the attribute `import-sheet-js=""` to the file input element:
```html
<input type="file" import-sheet-js="" multiple="false" />
```
- Define the directive:
```js
function SheetJSImportDirective() {
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return {
scope: { opts: '=' },
link: function ($scope, $elm) {
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$elm.on('change', function (changeEvent) {
var reader = new FileReader();
reader.onload = function (e) {
/* read workbook */
var bstr = e.target.result;
var workbook = XLSX.read(bstr, {type:'binary'});
/* DO SOMETHING WITH workbook HERE */
};
reader.readAsBinaryString(changeEvent.target.files[0]);
});
}
};
}
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```
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## Export Service
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An export can be triggered at any point! Depending on how data is represented,
a workbook object can be built using the utility functions. For example, using
an array of objects:
```js
/* starting from this data */
var data = [
{ name: "Barack Obama", pres: 44 },
{ name: "Donald Trump", pres: 45 }
];
/* generate a worksheet */
var ws = XLSX.utils.json_to_sheet(data);
/* add to workbook */
var wb = XLSX.utils.book_new();
XLSX.utils.book_append_sheet(wb, ws, "Presidents");
/* write workbook and force a download */
XLSX.writeFile(wb, "sheetjs.xlsx");
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```
## Demo
`grid.html` uses `angular-ui-grid` to display a table. The library does not
provide any way to modify the import button, so the demo includes a simple
directive for a HTML File Input control. It also includes a sample service for
export which adds an item to the export menu.
The demo `SheetJSImportDirective` follows the prescription from the README for
File input controls using `readAsBinaryString`, converting to a suitable
representation and updating the scope.
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`SheetJSExportService` exposes export functions for `XLSB` and `XLSX`. Other
file formats can be exported by changing the `bookType` variable. It grabs
values from the grid, builds an array of arrays, generates a workbook and forces
a download. By setting the `filename` and `sheetname` options in the `ui-grid`
options, the output can be controlled.
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[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)