AutoFit Rows and Columns

Microsoft Excel lets users auto size the width and height of cells according to its content. This feature is also available through Aspose.Cells so developers can auto size the dimensions of a cell at runtime.

Auto Fitting

Aspose.Cells provides a Workbook class that represents a Microsoft Excel file. The Workbook class contains a Worksheets collection that allows access to each worksheet in an Excel file. A worksheet is represented by the Worksheet class. The Worksheet class provides a wide range of properties and methods for managing a worksheet. This article looks at using the Worksheet class to autofit rows or columns.

AutoFit Row - Simple

The most straight-forward approach to auto-sizing the width and height of a row is to call the Worksheet class AutoFitRow method. The AutoFitRow method takes a row index (of the row to be resized) as a parameter.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

string InputPath = dataDir + "Book1.xlsx";

// Creating a file stream containing the Excel file to be opened
FileStream fstream = new FileStream(InputPath, FileMode.Open);

// Opening the Excel file through the file stream
Workbook workbook = new Workbook(fstream);

// Accessing the first worksheet in the Excel file
Worksheet worksheet = workbook.Worksheets[0];

// Auto-fitting the 3rd row of the worksheet
worksheet.AutoFitRow(1);

// Saving the modified Excel file
workbook.Save(dataDir  + "output.xlsx");

// Closing the file stream to free all resources
fstream.Close();

AutoFit Row in a Range of Cells

A row is composed of many columns. Aspose.Cells allows developers to auto-fit a row based on the content in a range of cells within the row by calling an overloaded version of the AutoFitRow method. It takes the following parameters:

• Row index, the index of the row about to be auto-fitted.
• First column index, the index of the row’s first column.
• Last column index, the index of the row’s last column.

The AutoFitRow method checks the contents of all the columns in the row and then auto-fits the row.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

string InputPath = dataDir + "Book1.xlsx";

// Creating a file stream containing the Excel file to be opened
FileStream fstream = new FileStream(InputPath, FileMode.Open);

// Opening the Excel file through the file stream
Workbook workbook = new Workbook(fstream);

// Accessing the first worksheet in the Excel file
Worksheet worksheet = workbook.Worksheets[0];

// Auto-fitting the 3rd row of the worksheet
worksheet.AutoFitRow(1, 0, 5);

// Saving the modified Excel file
workbook.Save(dataDir  + "output.xlsx");

// Closing the file stream to free all resources
fstream.Close();

AutoFit Column in a Range of Cells

A column is composed of many rows. It is possible to auto-fit a column based on the content in a range of cells in the column by calling an overloaded version of AutoFitColumn method that takes the following parameters:

• Column index, the index of the column about to be auto-fitted.
• First row index, the index of the column’s first row.
• Last row index, the index of the column’s last row.

The AutoFitColumn method checks the contents of all rows in the column and then auto-fits the column.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

string InputPath = dataDir + "Book1.xlsx";

// Creating a file stream containing the Excel file to be opened
FileStream fstream = new FileStream(InputPath, FileMode.Open);

// Opening the Excel file through the file stream
Workbook workbook = new Workbook(fstream);

// Accessing the first worksheet in the Excel file
Worksheet worksheet = workbook.Worksheets[0];

// Auto-fitting the Column of the worksheet
worksheet.AutoFitColumn(4, 4, 6);

// Saving the modified Excel file
workbook.Save(dataDir + "output.xlsx");

// Closing the file stream to free all resources
fstream.Close();

AutoFit Rows for Merged Cells

With Aspose.Cells it is possible to autofit rows even for cells that have been merged using the AutoFitterOptions API. AutoFitterOptions class provides AutoFitMergedCellsType property that can be used to autofit rows for merged cells. AutoFitMergedCellsType accepts AutoFitMergedCellsType enumerable which has the following members.

• None: Ignore merged cells.
• FirstLine: Only expands the height of the first row.
• LastLine: Only expands the height of the last row.
• EachLine: Only expands the height of each row.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
//Output directory
string outputDir = RunExamples.Get_OutputDirectory();

// Instantiate a new Workbook
Workbook wb = new Workbook();

// Get the first (default) worksheet
Worksheet _worksheet = wb.Worksheets[0];

// Create a range A1:B1
Range range = _worksheet.Cells.CreateRange(0, 0, 1, 2);

// Merge the cells
range.Merge();

// Insert value to the merged cell A1
_worksheet.Cells[0, 0].Value = "A quick brown fox jumps over the lazy dog. A quick brown fox jumps over the lazy dog....end";

// Create a style object
Aspose.Cells.Style style = _worksheet.Cells[0, 0].GetStyle();

// Set wrapping text on
style.IsTextWrapped = true;

// Apply the style to the cell
_worksheet.Cells[0, 0].SetStyle(style);

// Create an object for AutoFitterOptions
AutoFitterOptions options = new AutoFitterOptions();

// Set auto-fit for merged cells
options.AutoFitMergedCellsType = AutoFitMergedCellsType.EachLine;

// Autofit rows in the sheet(including the merged cells)
_worksheet.AutoFitRows(options);

// Save the Excel file
wb.Save(outputDir + "AutofitRowsforMergedCells.xlsx");

You may also try to use the overloaded versions of AutoFitRows & AutoFitColumns methods accepting a range of rows/columns and an instance of AutoFitterOptions to auto-fit the selected rows/columns with your desired AutoFitterOptions accordingly.

The signatures of the aforesaid methods are as follow:

1. AutoFitRows(int startRow, int endRow, AutoFitterOptions options)
2. AutoFitColumns(int firstColumn, int lastColumn, AutoFitterOptions options)

Important to Know

If a cell is merged then the AutoFit methods will not be applied, which is the same behavior as in Microsoft Excel. You can get around this by using the auto filter API. Moreover, if the text in a cell is wrapped, the AutoFitColumn method will not be applied either. Another thing you need to know is that the AutoFit methods are time-consuming. So, you should call these methods as seldom as possible to ensure the efficiency of your application.

Advance topics

• AutoFit Rows for Merged Cells