Lock and Protect Cells SpreadsheetGear API Sample

// Create a new workbook.
SpreadsheetGear.IWorkbook workbook = SpreadsheetGear.Factory.GetWorkbook();
            
// SAMPLE 1: Protect Sheet1 without a password.
{
    // Get reference to sheet one and local variable to cells.
    SpreadsheetGear.IWorksheet worksheet = workbook.Worksheets["Sheet1"];
    SpreadsheetGear.IRange cells = worksheet.Cells;

    // Add a couple of labels and AutoFit the column.
    cells["A1"].Value = "Row 1 is not locked - you can edit this cell.";
    cells["A2"].Value = "All other rows are locked - you cannot edit this cell.";
    cells["A3"].Value = "This sheet is not protected with a password.";
    cells["A1:A2"].Columns.AutoFit();

    // Get a reference to row 1.
    SpreadsheetGear.IRange row1 = cells["1:1"];

    // Unlock the range of cells. (NOTE: Cells are locked by default)
    row1.Locked = false;

    // Enable protection for the worksheet.
    worksheet.ProtectContents = true;
}

// SAMPLE 2: Protect Sheet2 with a password.
{
    // Add a second worksheet to the workbook and get local variable to cells.
    SpreadsheetGear.IWorksheet worksheet = workbook.Worksheets.Add();
    SpreadsheetGear.IRange cells = worksheet.Cells;

    // Add a couple of labels and AutoFit the column.
    cells["A1"].Value = "Row 1 is not locked - you can edit this cell.";
    cells["A2"].Value = "All other rows are locked - you cannot edit this cell.";
    cells["A3"].Value = "This sheet is protected with a password.";
    cells["A1:A2"].Columns.AutoFit();

    // Get a reference to row 1.
    SpreadsheetGear.IRange row1 = cells["1:1"];

    // Unlock the range of cells. (NOTE: Cells are locked by default)
    row1.Locked = false;

    // Enable protection for the worksheet.
    worksheet.Protect("MyPassword");
}