How to Import or Export data to Excel or HTML files from your
.NET applications?
Following examples show two different ways to import or export to Excel or HTML
files by using only GemBox.Spreadsheet .NET component.
GemBox.Spreadsheet is a .NET component which provides easy and high performance
way to write, read or convert native Microsoft Excel files (XLS, CSV or XLSX) and
HTML files without the need for Microsoft Excel on either the developer or client
machines. GemBox.Spreadsheet Free comes free of charge while GemBox.Spreadsheet
Professional is a commercial version (licensed per developer). Find more information
about GemBox.Spreadsheet features or reasons why our component is better then Excel Automation.
First example imports/exports data to Excel file (in XLS format) by directly working
with DataTable using InsertDataTable and ExtractToDataTable methods:
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ExcelFile ef =
new ExcelFile();
DataTable dataTable =
new DataTable();
// Depending on the format of the input file, you need to change this:
dataTable.Columns.Add("FirstName",
typeof(string));
dataTable.Columns.Add("LastName",
typeof(string));
// Load Excel file.
ef.LoadXls("FileName.xls");
// Select the first worksheet from the file.
ExcelWorksheet ws = ef.Worksheets[0];
// Extract the data from the worksheet to the DataTable.
// Data is extracted starting at first row and first column for 10 rows or until
the first empty row appears.
ws.ExtractToDataTable(dataTable, 10, ExtractDataOptions.StopAtFirstEmptyRow,
ws.Rows[0], ws.Columns[0]);
// Change the value of the first cell in the DataTable.
dataTable.Rows[0][0] = "Hello world!";
// Insert the data from DataTable to the worksheet starting
at cell "A1".
ws.InsertDataTable(dataTable, "A1",
true);
// Save the file to XLS format.
ef.SaveXls("DataTable.xls");
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Dim ef
As New ExcelFile
Dim dataTable As
New DataTable
' Depending on the format of the input file, you need to
change this:
dataTable.Columns.Add("FirstName",
GetType(String))
dataTable.Columns.Add("LastName",
GetType(String))
' Load Excel file.
ef.LoadXls("FileName.xls")
' Select the first worksheet from the file.
Dim ws As
ExcelWorksheet = ef.Worksheets(0)
' Extract the data from the worksheet to the DataTable.
' Data is extracted starting at first row and first column for 10 rows or until
the first empty row appears.
ws.ExtractToDataTable(dataTable, 10, ExtractDataOptions.StopAtFirstEmptyRow,
ws.Rows(0), ws.Columns(0))
' Change the value of the first cell in the DataTable.
dataTable.Rows(0)(0) = "Hello world!"
' Insert the data from DataTable to the worksheet
starting at cell "A1".
ws.InsertDataTable(dataTable, "A1",
True)
' Save the file to XLS format.
ef.SaveXls("DataTable.xls")
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Second example imports/exports data to Excel file (in XLS format) by direct access
to cells in the first worksheet:
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ExcelFile ef =
new ExcelFile();
// Loads Excel file.
ef.LoadXls("filename.xls");
// Selects first worksheet.
ExcelWorksheet ws = ef.Worksheets[0];
// Selects the first row from the worksheet.
ExcelRow row = ws.Rows[0];
foreach (ExcelCell
cell in row.AllocatedCells)
{
// Writes every cell of the first row
at the output.
Console.WriteLine(cell.Value);
}
// Writes "Hello world!" to the first cell of the
worksheet.
ws.Cells[0, 0].Value = "Hello world!";
// Saves the file in XLS format.
ef.SaveXls("NewFile.xls");
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Dim ef
As New ExcelFile
' Loads Excel file.
ef.LoadXls("filename.xls")
' Selects first worksheet.
Dim worksheet As
ExcelWorksheet = ef.Worksheets(0)
' Selects the first row from the worksheet.
Dim row As
ExcelRow = worksheet.Rows(0)
For Each cell
In row.AllocatedCells
' Writes every cell of the first
row at the output.
Console.WriteLine(cell.Value)
Next
' Writes "Hello world!" to the first cell
of the worksheet.
worksheet.Cells(0, 0).Value = "Hello world!"
' Saves the file in XLS format.
ef.SaveXls("NewFile.xls")
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To import/export the file in another format you only need to replace the LoadXls/SaveXls
method with preferred one (LoadXlsx/SaveXlsx, LoadCsv/SaveCsv or SaveHtml).
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