### Run example utility

Source: https://pub.dev/documentation/excel2003/latest/index.html

Execute the provided example command-line utility to read an .xls file.

```bash
# use your own .xls file or copy one into the repo root
dart run example/xls_reader_example.dart path/to/book.xls
```

--------------------------------

### Install excel2003 package

Source: https://pub.dev/documentation/excel2003/latest/index.html

Add the package to your Dart or Flutter project using the pub CLI.

```bash
dart pub add excel2003
```

--------------------------------

### Read Excel file content

Source: https://pub.dev/documentation/excel2003/latest/index.html

Example demonstrating how to open an .xls file and iterate through its sheets, rows, and columns to print cell values.

```dart
import 'package:excel2003/excel2003.dart';

void main() {
  final reader = XlsReader('路径/到/文件.xls');
  reader.open();
  print('工作表：${reader.sheetNames}');

  final sheet = reader.sheet(0);
  for (int row = sheet.firstRow; row < sheet.lastRow; row++) {
    for (int col = sheet.firstCol; col < sheet.lastCol; col++) {
      final value = sheet.cell(row, col);
      if (value != null) {
        print('Cell($row,$col)=$value');
      }
    }
  }
}
```

--------------------------------

### Example usage of XlsReader

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader-class.html

Opens an .xls file, prints sheet count, and iterates over all sheets and cells to print non-null values.

```dart
final reader = XlsReader('path/to/book.xls');
reader.open();

print('Sheet count: ${reader.sheetCount}');

for (int i = 0; i < reader.sheetCount; i++) {
  final sheet = reader.sheet(i);
  print('Sheet "${sheet.name}": ${sheet.rowCount} rows, ${sheet.colCount} cols');

  for (int r = 0; r < sheet.rowCount; r++) {
    for (int c = 0; c < sheet.colCount; c++) {
      final value = sheet.cell(r, c);
      if (value != null) {
        print('Cell($r, $c): $value');
      }
    }
  }
}
```

--------------------------------

### sheetCount

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/sheetCount.html

Gets the number of sheets in the workbook.

```APIDOC
## sheetCount

### Description
Returns the number of sheets in the workbook.

### Property
`int get sheetCount`

### Returns
- **int** - The number of sheets in the workbook.

### Implementation
```dart
int get sheetCount => _sheets.length;
```
```

--------------------------------

### rows getter

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/rows.html

Gets all rows as a 2D list. This getter iterates over the row range and returns a list of row lists.

```APIDOC
## rows getter

### Description
Gets all rows as a 2D list.

### Method
Getter

### Return Type
List<List<dynamic>>

### Implementation
```dart
List<List<dynamic>> get rows {
  final result = <List<dynamic>>[];
  for (int r = _firstRow; r < _lastRow; r++) {
    result.add(row(r));
  }
  return result;
}
```
```

--------------------------------

### getCell(int row, int col)

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/getCell.html

Gets the cell at the specified row and column. Returns null if the cell is empty or doesn't exist.

```APIDOC
## getCell(int row, int col)

### Description
Gets the cell at the specified row and column. Returns null if the cell is empty or doesn't exist.

### Method
`XlsCell? getCell(int row, int col)`

### Parameters
- **row** (int) - Required - The row index of the cell.
- **col** (int) - Required - The column index of the cell.

### Returns
- **XlsCell?** - The cell at the specified position, or null if the cell is empty or doesn't exist.

### Implementation
```dart
XlsCell? getCell(int row, int col) {
  return _cells[row]?[col];
}
```
```

--------------------------------

### Iterate sheets and cells

Source: https://pub.dev/documentation/excel2003/latest/index.html

Lists sheet names, gets the first sheet, and iterates the used range. firstRow/firstCol are inclusive, lastRow/lastCol are exclusive. Prints non-null cell values.

```Dart
// list sheet names
print(reader.sheetNames);

// grab sheet 0 (first sheet)
final sheet = reader.sheet(0);

// iterate the used range; firstRow/firstCol are inclusive, lastRow/lastCol
// are exclusive (similar to Dart ranges)
for (int r = sheet.firstRow; r < sheet.lastRow; r++) {
  for (int c = sheet.firstCol; c < sheet.lastCol; c++) {
    final v = sheet.cell(r, c);
    if (v != null) print('Cell($r,$c): $v');
  }
}
```

--------------------------------

### row(int rowIndex)

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/row.html

Gets a row as a list of cell values. The method takes a row index and returns a list of dynamic values representing the cells in that row.

```APIDOC
## row(int rowIndex)

### Description
Gets a row as a list of cell values.

### Method
row

### Parameters
- **rowIndex** (int) - Required - The index of the row to retrieve.

### Returns
List<dynamic> - A list of cell values in the specified row.

### Implementation
```dart
List<dynamic> row(int rowIndex) {
  final result = <dynamic>[];
  for (int c = _firstCol; c < _lastCol; c++) {
    result.add(cell(rowIndex, c));
  }
  return result;
}
```
```

--------------------------------

### rowCount getter

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/rowCount.html

Gets the number of rows with data in the sheet. This property is read-only and returns an integer.

```APIDOC
## rowCount property

### Description
Gets the number of rows with data in the sheet.

### Property
`int get rowCount`

### Returns
- **int** - The number of rows with data.

### Implementation
```dart
int get rowCount => _lastRow - _firstRow;
```
```

--------------------------------

### int get lastRow

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/lastRow.html

Gets the last row index (exclusive) of the sheet. This property is read-only and returns an integer value.

```APIDOC
## int get lastRow

### Description
Gets the last row index (exclusive) of the sheet.

### Property Signature
int get lastRow

### Return Value
- **int** - The last row index (exclusive).

### Implementation
```dart
int get lastRow => _lastRow;
```
```

--------------------------------

### cell(int row, int col)

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/cell.html

Gets the cell value at the specified row and column. Returns null if the cell is empty or doesn't exist.

```APIDOC
## cell(int row, int col)

### Description
Gets the cell value at the specified row and column. Returns null if the cell is empty or doesn't exist.

### Method
cell

### Parameters
- **row** (int) - Required - The row index of the cell.
- **col** (int) - Required - The column index of the cell.

### Returns
- **dynamic** - The value of the cell, or null if the cell is empty or doesn't exist.

### Implementation
```
dynamic cell(int row, int col) {
  return _cells[row]?[col]?.value;
}
```
```

--------------------------------

### int get colCount

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/colCount.html

Getter property that returns the number of columns with data in the sheet. It is implemented as the difference between the last and first column indices.

```APIDOC
## int get colCount

### Description
Returns the number of columns with data in the sheet.

### Property
- **Type**: int
- **Getter**: colCount

### Implementation
```dart
int get colCount => _lastCol - _firstCol;
```

```

--------------------------------

### column(int colIndex)

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/column.html

Gets a column as a list of cell values. The method iterates over all rows in the sheet and collects the value of the cell at the given column index for each row.

```APIDOC
## column(int colIndex)

### Description
Gets a column as a list of cell values. The method iterates over all rows in the sheet and collects the value of the cell at the given column index for each row.

### Method
column

### Signature
List<dynamic> column(int colIndex)

### Parameters
- **colIndex** (int) - Required - The zero-based index of the column to retrieve.

### Returns
- **List<dynamic>** - A list of cell values for the specified column, one per row.

### Implementation
```dart
List<dynamic> column(int colIndex) {
  final result = <dynamic>[];
  for (int r = _firstRow; r < _lastRow; r++) {
    result.add(cell(r, colIndex));
  }
  return result;
}
```
```

--------------------------------

### Iterable<XlsCell> get cells

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/cells.html

Returns an iterable of all non-empty cells in the sheet. This getter is used to access the cells that contain data, skipping empty ones.

```APIDOC
## Iterable<XlsCell> get cells

### Description
Returns an iterable of all non-empty cells in the sheet. This getter is used to access the cells that contain data, skipping empty ones.

### Method
Getter

### Return Type
Iterable<XlsCell>

### Implementation
```dart
Iterable<XlsCell> get cells sync* {
  for (final rowMap in _cells.values) {
    for (final cell in rowMap.values) {
      if (cell.type != CellType.empty) {
        yield cell;
      }
    }
  }
}
```
```

--------------------------------

### numericValue getter

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/numericValue.html

Gets the numeric value of the cell. Returns a double if the cell value is a number or a parseable string, otherwise returns null.

```APIDOC
## numericValue getter

### Description
Returns the cell value as a number, or null if not a number.

### Method
GET

### Endpoint
`numericValue`

### Parameters
None

### Return Value
- **double?** - The numeric value of the cell, or null if the value is not a number.

### Implementation
```dart
double? get numericValue {
  if (value is num) return value.toDouble();
  if (value is String) return double.tryParse(value);
  return null;
}
```
```

--------------------------------

### XlsReader.new

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/XlsReader.html

Documentation for the XlsReader constructor, which initializes an instance with a file path.

```APIDOC
## XlsReader.new

### Description
Creates a new XlsReader instance with the specified path to an Excel 2003 file.

### Constructor
XlsReader(String path)

### Parameters
- **path** (String) - Required - The path to the Excel file to read.

### Implementation
```dart
XlsReader(this.path);
```
```

--------------------------------

### open method implementation

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/open.html

Opens and parses the workbook. Throws ArgumentError if the file does not exist. Sets _opened to true after successful parsing.

```dart
void open() {
  if (_opened) return;

  if (!File(path).existsSync()) {
    throw ArgumentError('File not found: $path');
  }

  _ole2.open(path);
  _parseWorkbook();
  _opened = true;
}
```

--------------------------------

### XlsReader Constructor Implementation

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/XlsReader.html

Initializes the XlsReader with the specified file path.

```dart
XlsReader(this.path);
```

--------------------------------

### XlsReader.fromBytes factory constructor implementation

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/XlsReader.fromBytes.html

Creates an XlsReader from a Uint8List of bytes. The implementation creates an XlsReader with an empty string and then opens the bytes internally.

```dart
factory XlsReader.fromBytes(Uint8List bytes) {
  final reader = XlsReader('');
  reader._openBytes(bytes);
  return reader;
}
```

--------------------------------

### XlsReader.fromBytes(Uint8List bytes)

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/XlsReader.fromBytes.html

Creates an XlsReader from the provided bytes. This factory constructor initializes an XlsReader instance by reading the given byte array.

```APIDOC
## XlsReader.fromBytes(Uint8List bytes)

### Description
Creates an XlsReader from bytes.

### Constructor
XlsReader.fromBytes(Uint8List bytes)

### Parameters
- **bytes** (Uint8List) - Required - The byte array containing the Excel file data.

### Implementation
```dart
factory XlsReader.fromBytes(Uint8List bytes) {
  final reader = XlsReader('');
  reader._openBytes(bytes);
  return reader;
}
```
```

--------------------------------

### Open a workbook with XlsReader

Source: https://pub.dev/documentation/excel2003/latest/index.html

Creates an XlsReader from a file path and opens it. The open() method throws if the file is missing or not a valid BIFF8 stream. After opening, the sheetCount property is available.

```Dart
import 'package:excel2003/excel2003.dart';

void main() {
  // Create reader from file path. You can also call
  // `XlsReader.fromBytes(bytes)` if you already have the workbook data.
  final reader = XlsReader('path/to/workbook.xls');
  reader.open(); // throws if file is missing or not a valid BIFF8 stream

  print('Opened workbook with ${reader.sheetCount} sheets');
}
```

--------------------------------

### XlsCell constructor

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell-class.html

Creates a new XlsCell instance with the specified row, column, type, value, and optional xfIndex.

```APIDOC
## XlsCell({required int row, required int col, required CellType type, required dynamic value, int xfIndex = 0})

### Description
Creates a new XlsCell instance representing a cell in a worksheet.

### Parameters
- **row** (int) - Required - The row index of the cell.
- **col** (int) - Required - The column index of the cell.
- **type** (CellType) - Required - The type of the cell.
- **value** (dynamic) - Required - The value of the cell.
- **xfIndex** (int) - Optional - The formatting index, defaults to 0.
```

--------------------------------

### Read Excel 97-2003 files with XlsReader

Source: https://pub.dev/documentation/excel2003/latest/excel2003

Demonstrates opening an .xls file, listing sheet names, iterating through cells, and converting sheet data to maps.

```dart
import 'package:excel2003/excel2003.dart';

void main() {
  final reader = XlsReader('path/to/workbook.xls');
  reader.open();

  // List all sheets
  print('Sheets: ${reader.sheetNames}');

  // Access first sheet
  final sheet = reader.sheet(0);
  print('Sheet "${sheet.name}": ${sheet.rowCount} rows');

  // Read cell values
  for (int row = sheet.firstRow; row < sheet.lastRow; row++) {
    for (int col = sheet.firstCol; col < sheet.lastCol; col++) {
      final value = sheet.cell(row, col);
      if (value != null) {
        print('Cell($row, $col) = $value');
      }
    }
  }

  // Or convert to maps using first row as headers
  final data = sheet.toMaps();
  for (final row in data) {
    print(row);
  }
}
```

--------------------------------

### XlsCell methods

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell-class.html

Methods available on the XlsCell class.

```APIDOC
## XlsCell Methods

### toString() → String
Returns a string representation of this object. Overrides the default implementation.
```

--------------------------------

### Implementation of xfIndex

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/xfIndex.html

The xfIndex property is defined as a final integer.

```java
final int xfIndex;
```

--------------------------------

### toMaps method implementation

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/toMaps.html

Converts the sheet to a list of maps. Returns an empty list if there are no data rows. Uses the first row as headers, defaulting to 'Column$c' for empty header cells. Each subsequent row becomes a map with header keys.

```dart
List<Map<String, dynamic>> toMaps() {
  if (_lastRow <= _firstRow) return [];

  // Get headers from first row
  final headers = <String>[];
  for (int c = _firstCol; c < _lastCol; c++) {
    final value = cell(_firstRow, c);
    headers.add(value?.toString() ?? 'Column$c');
  }

  // Convert remaining rows to maps
  final result = <Map<String, dynamic>>[];
  for (int r = _firstRow + 1; r < _lastRow; r++) {
    final map = <String, dynamic>{};
    for (int c = 0; c < headers.length; c++) {
      map[headers[c]] = cell(r, _firstCol + c);
    }
    result.add(map);
  }

  return result;
}
```

--------------------------------

### XlsCell({required int row, required int col, required CellType type, required dynamic value, int xfIndex = 0})

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/XlsCell.html

Creates a new XlsCell instance with the specified row, column, type, value, and optional xfIndex. The xfIndex defaults to 0 if not provided.

```APIDOC
## XlsCell({required int row, required int col, required CellType type, required dynamic value, int xfIndex = 0})

### Description
Creates a new XlsCell instance with the specified row, column, type, value, and optional xfIndex. The xfIndex defaults to 0 if not provided.

### Parameters
- **row** (int) - Required - The row index of the cell.
- **col** (int) - Required - The column index of the cell.
- **type** (CellType) - Required - The type of the cell.
- **value** (dynamic) - Required - The value of the cell.
- **xfIndex** (int) - Optional - The index of the cell format, defaults to 0.

### Implementation
```dart
XlsCell({
  required this.row,
  required this.col,
  required this.type,
  required this.value,
  this.xfIndex = 0,
});
```
```

--------------------------------

### toMaps()

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet-class.html

Converts the sheet to a list of maps, using the first row as headers.

```APIDOC
## [toMaps] XlsSheet.toMaps()

### Description
Converts the sheet to a list of maps (each row as a map). Uses the first row as headers.

### Method
toMaps

### Signature
List<Map<String, dynamic>> toMaps()

### Parameters
None

### Return
(List<Map<String, dynamic>>) - A list of maps, each mapping header names to cell values for a row.
```

--------------------------------

### Convert a sheet to maps

Source: https://pub.dev/documentation/excel2003/latest/index.html

Treats the first non-empty row as column headers and returns a list of maps. Access values by header name, e.g., map['Name'].

```Dart
final rows = sheet.toMaps();
for (final map in rows) {
  print(map['Name']);
}
```

--------------------------------

### Implementation of toString for XlsSheet

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/toString.html

This override returns a formatted string containing the sheet name, row count, and column count.

```dart
@override
String toString() => 'XlsSheet("$name", rows: $rowCount, cols: $colCount)';
```

--------------------------------

### Implementation of toString method

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/toString.html

This implementation returns a string containing the row, column, and value of the cell, formatted as 'Cell(row, col): value'.

```dart
@override
String toString() => 'Cell($row, $col): $value';
```

--------------------------------

### Implementation of firstCol property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/firstCol.html

Retrieves the first column index using the _firstCol field.

```dart
int get firstCol => _firstCol;
```

--------------------------------

### Implementation of getCell method

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/getCell.html

This snippet shows the internal implementation of the getCell method, which accesses the _cells map using the provided row and column indices.

```dart
XlsCell? getCell(int row, int col) {
  return _cells[row]?[col];
}
```

--------------------------------

### XlsCell Constructor Implementation

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/XlsCell.html

The implementation of the XlsCell constructor requiring row, col, type, and value, with a default xfIndex of 0.

```dart
XlsCell({
  required this.row,
  required this.col,
  required this.type,
  required this.value,
  this.xfIndex = 0,
});
```

--------------------------------

### sheetNames

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/sheetNames.html

Getter property that returns the names of all sheets in the Excel workbook as a list of strings.

```APIDOC
## sheetNames

### Description
Returns the names of all sheets in the workbook.

### Property
List<String> get sheetNames

### Returns
List<String> - A list containing the names of all sheets.

### Implementation
```dart
List<String> get sheetNames => _sheets.map((s) => s.name).toList();
```
```

--------------------------------

### Implementation of column method

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/column.html

This method iterates through rows from _firstRow to _lastRow, collecting cell values at the specified colIndex into a list.

```dart
List<dynamic> column(int colIndex) {
  final result = <dynamic>[];
  for (int r = _firstRow; r < _lastRow; r++) {
    result.add(cell(r, colIndex));
  }
  return result;
}
```

--------------------------------

### name property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/name.html

A final String property that holds the name of the sheet.

```APIDOC
## name property

### Description
A final String property that holds the name of the sheet.

### Type
String

### Modifiers
final

### Implementation
dart
final String name;

```

--------------------------------

### sheetByName(String name)

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/sheetByName.html

Returns a sheet by name. The method performs a case-insensitive search and returns null if no sheet matches.

```APIDOC
## sheetByName(String name)

### Description
Returns a sheet by name. The method performs a case-insensitive search and returns null if no sheet matches.

### Method
sheetByName

### Signature
XlsSheet? sheetByName(String name)

### Parameters
- **name** (String) - Required - The name of the sheet to find.

### Return Value
- **XlsSheet?** - The sheet with the given name, or null if not found.

### Implementation
```dart
XlsSheet? sheetByName(String name) {
  final index = _sheets.indexWhere(
    (s) => s.name.toLowerCase() == name.toLowerCase(),
  );
  if (index < 0) return null;
  return sheet(index);
}
```
```

--------------------------------

### Implementation of the sheet method

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/sheet.html

This method retrieves a sheet by index, throwing a RangeError if the index is out of bounds. It uses the internal _sheets list and calls _parseSheet to return the XlsSheet object.

```dart
XlsSheet sheet(int index) {
  if (index < 0 || index >= _sheets.length) {
    throw RangeError('Sheet index out of range: $index');
  }

  final sheetInfo = _sheets[index];
  return _parseSheet(sheetInfo);
}
```

--------------------------------

### firstCol getter

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/firstCol.html

Getter for the first column index. Returns an integer representing the first column index.

```APIDOC
## firstCol property

### Description
Returns the first column index.

### Property Signature
int get firstCol

### Implementation
```dart
int get firstCol => _firstCol;
```
```

--------------------------------

### sheet(int index)

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/sheet.html

Returns a sheet by index. Throws a RangeError if the index is out of range.

```APIDOC
## sheet(int index)

### Description
Returns a sheet by index.

### Method
sheet

### Parameters
#### Parameters
- **index** (int) - Required - The index of the sheet to retrieve.

### Return Value
- **XlsSheet** - The sheet at the specified index.

### Exceptions
- **RangeError** - Thrown if the index is out of range (less than 0 or greater than or equal to the number of sheets).

### Implementation
```dart
XlsSheet sheet(int index) {
  if (index < 0 || index >= _sheets.length) {
    throw RangeError('Sheet index out of range: $index');
  }

  final sheetInfo = _sheets[index];
  return _parseSheet(sheetInfo);
}
```
```

--------------------------------

### firstRow getter

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/firstRow.html

Getter that returns the first row index of the sheet.

```APIDOC
## firstRow getter

### Description
Returns the first row index of the sheet.

### Method
GET

### Endpoint
firstRow

### Parameters
None

### Request Example
None

### Response
#### Success Response
- **return** (int) - The first row index.

#### Response Example
```
int
```
```

--------------------------------

### String toString()

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/toString.html

Returns a string representation of the XlsCell object. The implementation returns 'Cell($row, $col): $value'.

```APIDOC
## String toString()

### Description
Returns a string representation of the XlsCell object. The default implementation provides a textual representation useful for debugging and logging.

### Method
String toString()

### Implementation
```dart
@override
String toString() => 'Cell($row, $col): $value';
```

### Returns
- **String** - A string representation of the cell in the format 'Cell(row, col): value'.
```

--------------------------------

### XlsReader Class API

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader-class.html

Code snippets for the XlsReader class methods and constructors.

```APIDOC
## XlsReader(String path)

### Description
Creates an XlsReader instance from a file path.

### Constructor
XlsReader(String path)

### Parameters
- **path** (String) - Required - The path to the .xls file.

### Example
```dart
final reader = XlsReader('path/to/book.xls');
```
```

```APIDOC
## XlsReader.fromBytes(Uint8List bytes)

### Description
Creates an XlsReader from bytes. This is a factory constructor.

### Constructor
XlsReader.fromBytes(Uint8List bytes)

### Parameters
- **bytes** (Uint8List) - Required - The bytes of the .xls file.

### Example
```dart
final reader = XlsReader.fromBytes(bytes);
```
```

```APIDOC
## open()

### Description
Opens and parses the workbook.

### Method
void open()

### Parameters
None.

### Example
```dart
reader.open();
```
```

```APIDOC
## sheet(int index)

### Description
Returns a sheet by index.

### Method
XlsSheet sheet(int index)

### Parameters
- **index** (int) - Required - The index of the sheet.

### Returns
- **XlsSheet** - The sheet at the given index.

### Example
```dart
final sheet = reader.sheet(0);
```
```

```APIDOC
## sheetByName(String name)

### Description
Returns a sheet by name.

### Method
XlsSheet? sheetByName(String name)

### Parameters
- **name** (String) - Required - The name of the sheet.

### Returns
- **XlsSheet?** - The sheet with the given name, or null if not found.

### Example
```dart
final sheet = reader.sheetByName('Sheet1');
```
```

--------------------------------

### row method implementation

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/row.html

Returns a list of cell values for the given row index. Iterates from the first to the last column, adding each cell value to the result.

```dart
List<dynamic> row(int rowIndex) {
  final result = <dynamic>[];
  for (int c = _firstCol; c < _lastCol; c++) {
    result.add(cell(rowIndex, c));
  }
  return result;
}
```

--------------------------------

### rows getter implementation

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/rows.html

Returns all rows as a 2D list by iterating from _firstRow to _lastRow and calling row(r) for each index.

```dart
content_copyList<List<dynamic>> get rows {
  final result = <List<dynamic>>[];
  for (int r = _firstRow; r < _lastRow; r++) {
    result.add(row(r));
  }
  return result;
}
```

--------------------------------

### sheetNames getter implementation

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/sheetNames.html

Returns a list of sheet names by mapping each sheet object to its name property. This getter is part of the XlsReader class.

```dart
List<String> get sheetNames => _sheets.map((s) => s.name).toList();
```

--------------------------------

### sheetCount getter implementation

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/sheetCount.html

Returns the number of sheets by returning the length of the internal _sheets list. This is the exact implementation of the sheetCount getter.

```dart
content_copyint get sheetCount => _sheets.length;
```

--------------------------------

### Implementation of value property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/value.html

Defines the value property as a final dynamic type.

```dart
final dynamic value;
```

--------------------------------

### Implementation of the cell method

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/cell.html

This implementation accesses the internal _cells structure to retrieve the value at the given row and column indices.

```dart
dynamic cell(int row, int col) {
  return _cells[row]?[col]?.value;
}
```

--------------------------------

### sheetByName method implementation

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/sheetByName.html

Returns the sheet whose name matches the given name, case-insensitive. Iterates internal _sheets list comparing lowercased names; returns null if none matches, otherwise returns the sheet at that index.

```dart
content_copyXlsSheet? sheetByName(String name) {
  final index = _sheets.indexWhere(
    (s) => s.name.toLowerCase() == name.toLowerCase(),
  );
  if (index < 0) return null;
  return sheet(index);
}
```

--------------------------------

### Implement colCount property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/colCount.html

The implementation of the colCount property calculates the number of columns by subtracting the first column index from the last column index.

```dart
int get colCount => _lastCol - _firstCol;
```

--------------------------------

### Implementation of firstRow property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/firstRow.html

The firstRow property returns the integer index of the first row.

```dart
int get firstRow => _firstRow;
```

--------------------------------

### Declare final String path property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsReader/path.html

Declares a final String property named 'path' in a Dart class. This is the implementation of the 'path' property.

```dart
final String path;
```

--------------------------------

### Implementation of rowCount

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/rowCount.html

The rowCount property is implemented as a getter that calculates the number of rows with data by subtracting the first row index from the last row index.

```dart
int get rowCount => _lastRow - _firstRow;
```

--------------------------------

### Declare final String name property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/name.html

Declares a final String field named `name`. The `content_copy` label above the snippet suggests this code is intended to be copied.

```dart
final String name;
```

--------------------------------

### XlsCell properties

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell-class.html

Properties of the XlsCell class for accessing cell data.

```APIDOC
## XlsCell Properties

### col → int
Returns the column index of the cell.

### numericValue → double?
Returns the cell value as a number, or null if not a number.

### row → int
Returns the row index of the cell.

### stringValue → String
Returns the cell value as a string.

### type → CellType
Returns the type of the cell.

### value → dynamic
Returns the value of the cell.

### xfIndex → int
Returns the formatting index of the cell.
```

--------------------------------

### stringValue getter implementation

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/stringValue.html

Getter that returns the cell value as a string, returning an empty string if the value is null.

```dart
content_copyString get stringValue {
  if (value == null) return '';
  return value.toString();
}
```

--------------------------------

### Implementation of lastCol property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/lastCol.html

The lastCol property is implemented as a getter that returns the private _lastCol field.

```dart
int get lastCol => _lastCol;
```

--------------------------------

### Implementation of col property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/col.html

The col property is declared as a final integer.

```dart
final int col;
```

--------------------------------

### xfIndex property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/xfIndex.html

The xfIndex property is a final integer that holds the index of the cell's extended format. It is read-only and can be accessed directly.

```APIDOC
## xfIndex property

### Description
The xfIndex property is a final integer that represents the index of the cell's extended format. It is read-only and can be accessed directly.

### Declaration
```dart
final int xfIndex;
```

### Type
int

### Modifiers
final

### Usage
This property is used to retrieve the format index of a cell. It is typically accessed after obtaining an XlsCell object.
```

--------------------------------

### Implementation of row property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/row.html

The row property is declared as a final integer.

```dart
final int row;
```

--------------------------------

### Implementation of type property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/type.html

The type property is defined as a final CellType field.

```dart
final CellType type;
```

--------------------------------

### Implementation of numericValue property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/numericValue.html

This getter checks if the cell value is a number or a string, returning the double representation or null if conversion is not possible.

```dart
double? get numericValue {
  if (value is num) return value.toDouble();
  if (value is String) return double.tryParse(value);
  return null;
}
```

--------------------------------

### Dart implementation of cells getter

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/cells.html

Defines the `cells` getter as a sync* generator that iterates over the internal `_cells` map and yields each cell with type different from `CellType.empty`.

```dart
Iterable<XlsCell> get cells sync* {
  for (final rowMap in _cells.values) {
    for (final cell in rowMap.values) {
      if (cell.type != CellType.empty) {
        yield cell;
      }
    }
  }
}
```

--------------------------------

### Implementation of lastRow getter

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/lastRow.html

Returns the internal `_lastRow` value. The index is exclusive, meaning it points to the first row after the last used row. No additional logic is provided; the getter simply forwards the internal field.

```dart
content_copyint get lastRow => _lastRow;

```

--------------------------------

### lastCol getter

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsSheet/lastCol.html

Returns the last column index (exclusive) as an integer. This getter provides read-only access to the last column index of the sheet.

```APIDOC
## lastCol getter

### Description
Returns the last column index (exclusive) as an integer.

### Method
GET

### Endpoint
lastCol

### Parameters
None

### Implementation
```dart
int get lastCol => _lastCol;
```

### Return Value
- **int** - The last column index (exclusive).
```

--------------------------------

### row property

Source: https://pub.dev/documentation/excel2003/latest/excel2003/XlsCell/row.html

The row property is a final integer that holds the row index of the cell. It is read-only and can be accessed directly.

```APIDOC
## row property

### Description
The row property is a final integer that represents the row index of the cell. It is read-only and can be accessed directly.

### Property
- **row** (int) - final - The row index of the cell.

### Implementation
```dart
final int row;
```
```

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