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Protection in JavaScript Spreadsheet control

Sheet protection helps you to prevent the users from modifying the data in the spreadsheet.

Protect Sheet

Protect sheet feature helps you to prevent the unknown users from accidentally changing, editing, moving, or deleting data in a spreadsheet. You can use the isProtected property to enable or disable the Protecting functionality.

  • The default value for isProtected property is false.

By default in protected sheet, selecting, formatting, inserting, deleting functionalities are disabled. To enable some of the above said functionalities the protectSettings options are used in a protected spreadsheet.

The available protectSettings options in spreadsheet are,

Options Uses
Select Cells Used to perform Cell Selection.
Format Cells Used to perform Cell formatting.
Format Rows Used to perform Row formatting.
Format Columns Used to perform Column formatting.
Insert Link Used to perform Hyperlink Insertions.
  • The default value for all protectSettings options are false.

By default, the Protect Sheet module is injected internally into the Spreadsheet to perform sheet protection function.

User Interface

In the active Spreadsheet, the sheet protection can be done by any of the following ways:

  • Select the Protect Sheet item in the Ribbon toolbar under the Data Tab, and then select your desired options.
  • Right-click the sheet tab, select the Protect Sheet item in the context menu, and then select your desired options.
  • Use the protectSheet() method programmatically.

The following code example shows Protect Sheet functionality in the Spreadsheet control.

Source
Preview
app.ts
index.html
import { Spreadsheet, ColumnModel } from '@syncfusion/ej2-spreadsheet';
import { budgetData, salaryData } from './datasource.ts';

let columns: ColumnModel[] = [{ width: 100 }, { width: 100 },{ width: 100},
    { width: 100 }];

let spreadsheet: Spreadsheet = new Spreadsheet({
    sheets: [{ name: 'Budget', ranges: [{ dataSource: budgetData }], columns: columns,isProtected: true, protectSettings: {selectCells: true} },
                {name: 'Salary', ranges: [{ dataSource: salaryData }], columns: columns}],
    dataBound: function () {
                spreadsheet.cellFormat({ fontWeight: 'bold', textAlign: 'center' }, 'A1:D1');
                spreadsheet.cellFormat({ fontWeight: 'bold'}, 'A11:D11');
            }
        }
    }
});
spreadsheet.appendTo('#spreadsheet');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 SpreadSheet</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link rel="shortcut icon" href="resources/favicon.ico" />
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-grids/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-spreadsheet/styles/material.css" rel="stylesheet" />
    <link href="styles.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.4.1/shim.min.js"></script>
    <script src="system.config.js"></script>
    <script src="es5-datasource.js" type="text/javascript"></script>
</head>

<body>
    <!--Element which is going to render-->
    <button id="button" style="margin-bottom: 10px;">Unlock Cells</button>
    <div id="dialog"></div>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id="spreadsheet"></div>
    </div>
</body>

</html>

Unprotect Sheet

Unprotect sheet is used to enable all the functionalities that are already disabled in a protected spreadsheet.

User Interface

In the active Spreadsheet, the sheet Unprotection can be done by any of the following ways:

  • Select the Unprotect Sheet item in the Ribbon toolbar under the Data Tab.
  • Right-click the sheet tab, select the Unprotect Sheet item in the context menu.
  • Use the unprotectSheet() method programmatically.

Unlock the particular cells in the protected sheet

In protected spreadsheet, to make some particular cell or range of cells are editable, you can use lockCells() method, with the parameter range and isLocked property as false.

Source
Preview
app.ts
index.html
import { Spreadsheet, ColumnModel } from '@syncfusion/ej2-spreadsheet';
import { Button } from '@syncfusion/ej2-buttons';
import { Dialog } from '@syncfusion/ej2-popups';
import { budgetData, salaryData } from './datasource.ts';

let columns: ColumnModel[] = [{ width: 100 }, { width: 100 },{ width: 100},
    { width: 100 }]

let spreadsheet: Spreadsheet = new Spreadsheet({
    sheets: [{ name: 'Budget', ranges: [{ dataSource: budgetData }], columns: columns,isProtected: true, protectSettings: {selectCells: true} },
                {name: 'Salary', ranges: [{ dataSource: salaryData }], columns: columns}],
    dataBound: function () {
                spreadsheet.cellFormat({ fontWeight: 'bold', textAlign: 'center' }, 'A1:D1');
                spreadsheet.cellFormat({ fontWeight: 'bold'}, 'A11:D11');
            }
        }
    }
});
spreadsheet.appendTo('#spreadsheet');
let dialogObj: Dialog = new Dialog({
        header: 'Spreadsheet',
        target: document.getElementById('spreadsheet'),
        content: '"A1:F3" range of cells has been unlocked.',
        showCloseIcon: true,
        isModel: true,
        visible: false,
        width: '500px',
        buttons: [{
            click: lockCells,
            buttonModel: { content: 'Ok', isPrimary: true }
        }];
    });
dialogObj.appendTo('#dialog');
let button: Button = new Button({content: 'Unlock cells'});
button.appendTo('#button');
document.getElementById('button').onclick = (): void => {
    dialogObj.show();
}
function lockCells(): void {
    spreadsheet.lockCells('A1:F3', false);
    dialogObj.hide();
}
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 SpreadSheet</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link rel="shortcut icon" href="resources/favicon.ico" />
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-grids/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-spreadsheet/styles/material.css" rel="stylesheet" />
    <link href="styles.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.4.1/shim.min.js"></script>
    <script src="system.config.js"></script>
    <script src="es5-datasource.js" type="text/javascript"></script>
</head>

<body>
    <!--Element which is going to render-->
    <button id="button" style="margin-bottom: 10px;">Unlock Cells</button>
    <div id="dialog"></div>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id="spreadsheet"></div>
    </div>
</body>

</html>

See Also