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Protection in ASP.NET Core Spreadsheet control

02 Aug 2021 / 4 minutes to read

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 example shows Protect Sheet functionality in the Spreadsheet control.

tagHelper

protectSheetController.cs

<ejs-spreadsheet id="spreadsheet" dataBound="dataBound">
        <e-spreadsheet-sheets>
            <e-spreadsheet-sheet isProtected="true" name="Budget">
                <e-spreadsheet-protect-settings selectCells="true"></e-spreadsheet-protect-settings>
                <e-spreadsheet-ranges>
                    <e-spreadsheet-range dataSource="ViewBag.budgetData"></e-spreadsheet-range>
                </e-spreadsheet-ranges>
                <e-spreadsheet-columns>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                </e-spreadsheet-columns>
            </e-spreadsheet-sheet>
            <e-spreadsheet-sheet name="Salary">
                <e-spreadsheet-ranges>
                    <e-spreadsheet-range dataSource="ViewBag.salaryData"></e-spreadsheet-range>
                </e-spreadsheet-ranges>
                <e-spreadsheet-columns>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                </e-spreadsheet-columns>
            </e-spreadsheet-sheet>
        </e-spreadsheet-sheets>
    </ejs-spreadsheet>

 

    <script>

      function dataBound() {
        this.cellFormat({ fontWeight: 'bold', textAlign: 'center' }, 'A1:D1');
        this.cellFormat({ fontWeight: 'bold'}, 'A11:D11');
        this.protectSheet(1, { selectCells: false});
    }

    </script>

public IActionResult Index()
        {
           List<object> data1 = new List<object>()
            {
               new { ExpenseType= "Housing",  ProjectedCost= "7000",  ActualCost= "7500",  Difference= "-500"},
               new { ExpenseType= "Transportation",  ProjectedCost= "500",  ActualCost= "500",  Difference= "0"},
               new { ExpenseType= "Insurance",  ProjectedCost= "1000",  ActualCost= "1000",  Difference= "0"},
               new { ExpenseType= "Food",  ProjectedCost= "2000",  ActualCost= "1800",  Difference= "200"},
               new { ExpenseType= "Pets",  ProjectedCost= "300",  ActualCost= "200",  Difference= "100"},
               new { ExpenseType= "Personel Care",  ProjectedCost= "500",  ActualCost= "500",  Difference= "0"},
               new { ExpenseType= "Loan",  ProjectedCost= "1000",  ActualCost= "1000",  Difference= "0"},
               new { ExpenseType= "Tax",  ProjectedCost= "200",  ActualCost= "200",  Difference= "0"},
               new { ExpenseType= "Savings",  ProjectedCost= "1000",  ActualCost= "900",  Difference= "100"},
               new { ExpenseType= "Total",  ProjectedCost= "13500",  ActualCost= "13600",  Difference= "-100"},
            };
            List<object> data2 = new List<object>()
            {
                new { Earnings= "Basic",  CreditAmount= "20000",  Deductions= "Provident Fund",  DebitAmount= "2400"},
               new { Earnings= "HRA",  CreditAmount= "8000",  Deductions= "ESI",  DebitAmount= "0"},
               new { Earnings= "Special Allowance",  CreditAmount= "25000",  Deductions= "Professional Tax",  DebitAmount= "200"},
               new { Earnings= "Incentives",  CreditAmount= "2000",  Deductions= "TDS",  DebitAmount= "2750"},
               new { Earnings= "Bonus",  CreditAmount= "1500",  Deductions= "Other Deduction",  DebitAmount= "0"},
               new { Earnings= "Total Earnings",  CreditAmount= "56500",  Deductions= "Total Deductions",  DebitAmount= "5350"},
            };
            ViewBag.budgetData = data1;
            ViewBag.salaryData = data2;
            return View();
        }

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.

tagHelper

lockCellController.cs

<button id="customBtn" class="e-btn"> Unlock cells</button>
    <ejs-spreadsheet id="spreadsheet" dataBound="dataBound">
        <e-spreadsheet-sheets>
            <e-spreadsheet-sheet isProtected="true" name="Budget">
                <e-spreadsheet-protect-settings selectCells="true"></e-spreadsheet-protect-settings>
                <e-spreadsheet-ranges>
                    <e-spreadsheet-range dataSource="ViewBag.budgetData"></e-spreadsheet-range>
                </e-spreadsheet-ranges>
                <e-spreadsheet-columns>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                </e-spreadsheet-columns>
            </e-spreadsheet-sheet>
            <e-spreadsheet-sheet name="Salary">
                <e-spreadsheet-ranges>
                    <e-spreadsheet-range dataSource="ViewBag.salaryData"></e-spreadsheet-range>
                </e-spreadsheet-ranges>
                <e-spreadsheet-columns>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                </e-spreadsheet-columns>
            </e-spreadsheet-sheet>
        </e-spreadsheet-sheets>
    </ejs-spreadsheet>

<ejs-dialog id="defaultDialog" header="Spreadsheet" target="#spreadsheet" content="'A1:F3' range of cells has been unlocked." showCloseIcon="true" isModal="true" visible="false" width="500px" buttons="ViewBag.DefaultButtons"></ejs-dialog>
 

    <script>

        document.getElementById("customBtn").addEventListener('click', showAlert);
        function dataBound() {
            this.cellFormat({ fontWeight: 'bold', textAlign: 'center' }, 'A1:D1');
            this.cellFormat({ fontWeight: 'bold' }, 'A11:D11');
        }
        function lockCells() {
            var spreadsheetObj = ej.base.getComponent(document.getElementById('spreadsheet'), 'spreadsheet');
            var dialogObj = ej.base.getComponent(document.getElementById('defaultDialog'), 'dialog');
            spreadsheetObj.lockCells('A1:F3', false);
            dialogObj.hide();
        }
        function showAlert() {
            var dialogObj = ej.base.getComponent(document.getElementById('defaultDialog'), 'dialog');
            dialogObj.show();
        }
    </script>

public IActionResult Index()
        {
            List<object> data1 = new List<object>()
            {
               new { ExpenseType= "Housing",  ProjectedCost= "7000",  ActualCost= "7500",  Difference= "-500"},
               new { ExpenseType= "Transportation",  ProjectedCost= "500",  ActualCost= "500",  Difference= "0"},
               new { ExpenseType= "Insurance",  ProjectedCost= "1000",  ActualCost= "1000",  Difference= "0"},
               new { ExpenseType= "Food",  ProjectedCost= "2000",  ActualCost= "1800",  Difference= "200"},
               new { ExpenseType= "Pets",  ProjectedCost= "300",  ActualCost= "200",  Difference= "100"},
               new { ExpenseType= "Personel Care",  ProjectedCost= "500",  ActualCost= "500",  Difference= "0"},
               new { ExpenseType= "Loan",  ProjectedCost= "1000",  ActualCost= "1000",  Difference= "0"},
               new { ExpenseType= "Tax",  ProjectedCost= "200",  ActualCost= "200",  Difference= "0"},
               new { ExpenseType= "Savings",  ProjectedCost= "1000",  ActualCost= "900",  Difference= "100"},
               new { ExpenseType= "Total",  ProjectedCost= "13500",  ActualCost= "13600",  Difference= "-100"},
            };
            List<object> data2 = new List<object>()
            {
                new { Earnings= "Basic",  CreditAmount= "20000",  Deductions= "Provident Fund",  DebitAmount= "2400"},
               new { Earnings= "HRA",  CreditAmount= "8000",  Deductions= "ESI",  DebitAmount= "0"},
               new { Earnings= "Special Allowance",  CreditAmount= "25000",  Deductions= "Professional Tax",  DebitAmount= "200"},
               new { Earnings= "Incentives",  CreditAmount= "2000",  Deductions= "TDS",  DebitAmount= "2750"},
               new { Earnings= "Bonus",  CreditAmount= "1500",  Deductions= "Other Deduction",  DebitAmount= "0"},
               new { Earnings= "Total Earnings",  CreditAmount= "56500",  Deductions= "Total Deductions",  DebitAmount= "5350"},
            };
            List<DialogDialogButton> buttons = new List<DialogDialogButton>() { };
            buttons.Add(new DialogDialogButton() { Click = "lockCells", ButtonModel = new DefaultButtonModel() { content = "OK", isPrimary = true } });
            ViewBag.DefaultButtons = buttons;
            ViewBag.budgetData = data1;
            ViewBag.salaryData = data2;
            return View();
        }

        public class DefaultButtonModel
    {
        public string content { get; set; }
        public bool isPrimary { get; set; }
    }

Limitations of Protect Sheet

Password protection is not supported in Protect sheet feature.

Protect Workbook

Protect workbook feature helps you to protect the workbook so that users cannot insert, delete, rename, hide the sheets in the spreadsheet. You can use the password property to protect workbook with password. You can use the isProtected property to protect or unprotect the workbook without the password.

The default value for isProtected property is false.

User Interface:

In the active Spreadsheet, you can protect the worksheet by selecting the Data tab in the Ribbon toolbar and choosing the Protect Workbook item. Then, enter the password and confirm it and click on OK.

The following example shows Protect Workbook by using the isProtected property in the Spreadsheet control.

tagHelper

protectWorkbookController.cs

<ejs-spreadsheet id="spreadsheet" isProtected="true" dataBound="dataBound">
        <e-spreadsheet-sheets>
            <e-spreadsheet-sheet name="Budget">
                <e-spreadsheet-ranges>
                    <e-spreadsheet-range dataSource="ViewBag.budgetData"></e-spreadsheet-range>
                </e-spreadsheet-ranges>
                <e-spreadsheet-columns>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                </e-spreadsheet-columns>
            </e-spreadsheet-sheet>
        </e-spreadsheet-sheets>
    </ejs-spreadsheet>


    <script>

      function dataBound() {
        this.cellFormat({ fontWeight: 'bold', textAlign: 'center' }, 'A1:D1');
        this.cellFormat({ fontWeight: 'bold'}, 'A11:D11');
    }

    </script>

public IActionResult Index()
        {
           List<object> data = new List<object>()
            {
               new { ExpenseType= "Housing",  ProjectedCost= "7000",  ActualCost= "7500",  Difference= "-500"},
               new { ExpenseType= "Transportation",  ProjectedCost= "500",  ActualCost= "500",  Difference= "0"},
               new { ExpenseType= "Insurance",  ProjectedCost= "1000",  ActualCost= "1000",  Difference= "0"},
               new { ExpenseType= "Food",  ProjectedCost= "2000",  ActualCost= "1800",  Difference= "200"},
               new { ExpenseType= "Pets",  ProjectedCost= "300",  ActualCost= "200",  Difference= "100"},
               new { ExpenseType= "Personel Care",  ProjectedCost= "500",  ActualCost= "500",  Difference= "0"},
               new { ExpenseType= "Loan",  ProjectedCost= "1000",  ActualCost= "1000",  Difference= "0"},
               new { ExpenseType= "Tax",  ProjectedCost= "200",  ActualCost= "200",  Difference= "0"},
               new { ExpenseType= "Savings",  ProjectedCost= "1000",  ActualCost= "900",  Difference= "100"},
               new { ExpenseType= "Total",  ProjectedCost= "13500",  ActualCost= "13600",  Difference= "-100"},
            };
            ViewBag.budgetData = data;
            return View();
        }

The following example shows Protect Workbook by using the password property in the Spreadsheet control. To unprotect the workbook, click the unprotect workbook button in the data tab and provide the password as syncfusion in the dialog box.

tagHelper

passwordController.cs

<ejs-spreadsheet id="spreadsheet" password="syncfusion" dataBound="dataBound">
        <e-spreadsheet-sheets>
            <e-spreadsheet-sheet name="Budget">
                <e-spreadsheet-ranges>
                    <e-spreadsheet-range dataSource="ViewBag.budgetData"></e-spreadsheet-range>
                </e-spreadsheet-ranges>
                <e-spreadsheet-columns>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                    <e-spreadsheet-column width="100"></e-spreadsheet-column>
                </e-spreadsheet-columns>
            </e-spreadsheet-sheet>
        </e-spreadsheet-sheets>
    </ejs-spreadsheet>

 

    <script>

      function dataBound() {
        this.cellFormat({ fontWeight: 'bold', textAlign: 'center' }, 'A1:D1');
        this.cellFormat({ fontWeight: 'bold'}, 'A11:D11');
    }

    </script>

public IActionResult Index()
        {
           List<object> data = new List<object>()
            {
               new { ExpenseType= "Housing",  ProjectedCost= "7000",  ActualCost= "7500",  Difference= "-500"},
               new { ExpenseType= "Transportation",  ProjectedCost= "500",  ActualCost= "500",  Difference= "0"},
               new { ExpenseType= "Insurance",  ProjectedCost= "1000",  ActualCost= "1000",  Difference= "0"},
               new { ExpenseType= "Food",  ProjectedCost= "2000",  ActualCost= "1800",  Difference= "200"},
               new { ExpenseType= "Pets",  ProjectedCost= "300",  ActualCost= "200",  Difference= "100"},
               new { ExpenseType= "Personel Care",  ProjectedCost= "500",  ActualCost= "500",  Difference= "0"},
               new { ExpenseType= "Loan",  ProjectedCost= "1000",  ActualCost= "1000",  Difference= "0"},
               new { ExpenseType= "Tax",  ProjectedCost= "200",  ActualCost= "200",  Difference= "0"},
               new { ExpenseType= "Savings",  ProjectedCost= "1000",  ActualCost= "900",  Difference= "100"},
               new { ExpenseType= "Total",  ProjectedCost= "13500",  ActualCost= "13600",  Difference= "-100"},
            };
            ViewBag.budgetData = data;
            return View();
        }

Unprotect Workbook

Unprotect Workbook is used to enable the insert, delete, rename, move, copy, hide or unhide sheets feature in the spreadsheet.

User Interface:

In the active Spreadsheet, the workbook Unprotection can be done in any of the following ways:

Select the Unprotect Workbook item in the Ribbon toolbar under the Data Tab and provide the valid password in the dialog box.

Limitations of Protect Workbook

Encryption with password is not supported in the Protect workbook feature.

Protection in ASP.NET Core Spreadsheet control

Protect Sheet

Unprotect Sheet

Unlock the particular cells in the protected sheet

Limitations of Protect Sheet

Protect Workbook

Unprotect Workbook

Limitations of Protect Workbook

See Also