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    <p>In my C# applications I use the EPPLUS library (<a href="http://epplus.codeplex.com/" rel="nofollow">http://epplus.codeplex.com/</a>) It is really good and fast I would say.</p> <p>Here is my code to open a sheet of a file using EPPLUS and load the data into a DataTable:</p> <pre><code>using System; using System.Collections.Generic; using System.Drawing; using System.Reflection; using System.Text; using System.Globalization; using System.Diagnostics; using System.Data; using System.Windows; using System.Windows.Controls; using System.IO; using OfficeOpenXml; using OfficeOpenXml.Style; using OfficeOpenXml.Drawing.Chart; using System.Xml; public class ProjectLoad { /// &lt;summary&gt; /// /// &lt;/summary&gt; /// &lt;param name="filePath"&gt;&lt;/param&gt; public void Load ( string filePath ) { // Get the file we are going to process FileInfo existingFile = new FileInfo( filePath ); try { if ( existingFile.Exists == true ) { // Open and read the XlSX file. using ( ExcelPackage package = new ExcelPackage( existingFile ) ) { // Get the work book in the file ExcelWorkbook workBook = package.Workbook; if ( workBook != null ) { if ( workBook.Worksheets.Count &gt; 0 ) { // read some data int sheet_number = 0; DataTable table = load_sheet_toDataGrid( workBook.Worksheets[sheet_number] ); } } } catch ( System.IO.IOException ) { //error message } } /// &lt;summary&gt; /// loads the content of a sheet into a datatable /// &lt;/summary&gt; /// &lt;param name="currentWorksheet"&gt;&lt;/param&gt; /// &lt;returns&gt;&lt;/returns&gt; private DataTable load_sheet_toDataGrid ( ExcelWorksheet currentWorksheet ) { DataTable dt = new DataTable( ); int rows = currentWorksheet.Dimension.End.Row; int cols = currentWorksheet.Dimension.End.Column; //Add columns for ( int c = 0 ; c &lt; cols ; c++ ) { dt.Columns.Add( currentWorksheet.Cells[0 + 1 , c + 1].Value.ToString( ) ); } //add values for ( int r = 1 ; r &lt; rows ; r++ ) { object[] ob = new object[cols]; for ( int c = 0 ; c &lt; cols ; c++ ) { double value; bool isDouble = Double.TryParse( currentWorksheet.Cells[r + 1 , c + 1].Value.ToString( ) , out value ); bool isDate = false; DateTime date = new DateTime( ); if ( c == 0 &amp;&amp; !isDouble ) { isDate = DateTime.TryParse( currentWorksheet.Cells[r + 1 , c + 1].Value.ToString( ) , out date ); } if ( isDouble ) { ob[c] = value; } else if ( isDate ) { ob[c] = date; } else { ob[c] = currentWorksheet.Cells[r + 1 , c + 1].Value; } } dt.Rows.Add( ob ); } return dt; } } </code></pre>
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    1. POReading Excel file on condition
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    1. USuser721807
    1. USuser721807
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    1. This table or related slice is empty.
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