Create DataTable from Excel sheet in C# and VB.NET

The following example shows how you can create DataTable from a specific cell range in the Excel worksheet in C# and VB.NET.

The example also shows some of the CreateDataTableOptions members used for specifying options for creating DataTable and filling it with values from ExcelWorksheet.

The DataTable column types are determined based on a value of a CreateDataTableOptions.Resolution property.

DataTable data created from Excel worksheet with GemBox.Spreadsheet

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C#
VB.NET

using System;
using System.Data;
using System.Text;
using GemBox.Spreadsheet;

class Program
{
    static void Main()
    {
        // If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");

        var workbook = ExcelFile.Load("%InputFileName%");

        // Select the first worksheet from the file.
        var worksheet = workbook.Worksheets[0];

        // Create DataTable from an Excel worksheet.
        var dataTable = worksheet.CreateDataTable(new CreateDataTableOptions()
        {
            ColumnHeaders = true,
            StartRow = 1,
            NumberOfColumns = 5,
            NumberOfRows = worksheet.Rows.Count - 1,
            Resolution = ColumnTypeResolution.AutoPreferStringCurrentCulture
        });

        // Write DataTable content
        var sb = new StringBuilder();
        sb.AppendLine("DataTable content:");
        foreach (DataRow row in dataTable.Rows)
        {
            sb.AppendFormat("{0}\t{1}\t{2}\t{3}\t{4}", row[0], row[1], row[2], row[3], row[4]);
            sb.AppendLine();
        }

        Console.WriteLine(sb.ToString());
    }
}

Imports System
Imports System.Data
Imports System.Text
Imports GemBox.Spreadsheet

Module Program

    Sub Main()

        ' If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY")

        Dim workbook = ExcelFile.Load("%InputFileName%")

        ' Select the first worksheet from the file.
        Dim worksheet = workbook.Worksheets(0)

        ' Create DataTable from an Excel worksheet.
        Dim dataTable = worksheet.CreateDataTable(New CreateDataTableOptions() With
        {
            .ColumnHeaders = True,
            .StartRow = 1,
            .NumberOfColumns = 5,
            .NumberOfRows = worksheet.Rows.Count - 1,
            .Resolution = ColumnTypeResolution.AutoPreferStringCurrentCulture
        })

        ' Write DataTable content
        Dim sb = New StringBuilder()
        sb.AppendLine("DataTable content:")
        For Each row As DataRow In dataTable.Rows

            sb.AppendFormat("{0}" & vbTab & "{1}" & vbTab & "{2}" & vbTab & "{3}" & vbTab & "{4}", row(0), row(1), row(2), row(3), row(4))
            sb.AppendLine()
        Next

        Console.WriteLine(sb.ToString())
    End Sub
End Module

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If you want to try the GemBox.Spreadsheet yourself, you can download the free version. It delivers the same performance and set of features as the professional version, but with some operations limited. To remove the limitation, you need to purchase a license.

Published: December 13, 2018 | Modified: November 20, 2020 | Author: Marko Kozlina