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POExport DataTable to Excel with Open Xml SDK in c#
 

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  1. POExport DataTable to Excel with Open Xml SDK in c#
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    <p>Sorry for my english please. I'm new in open xml sdk. My program have ability to export some data and DataTable to Excel file (template) In the template I insert the data to some placeholders. It's works very good, but I need to insert a DataTable too... My sample code:</p> <pre><code>using (Stream OutStream = new MemoryStream()) { // read teamplate using (var fileStream = File.OpenRead(templatePath)) fileStream.CopyTo(OutStream); // exporting Exporting(OutStream); // to start OutStream.Seek(0L, SeekOrigin.Begin); // out using (var resultFile = File.Create(resultPath)) OutStream.CopyTo(resultFile); </code></pre> <p>Next method to exporting</p> <pre><code>private void Exporting(Stream template) { using (var workbook = SpreadsheetDocument.Open(template, true, new OpenSettings { AutoSave = true })) { // Replace shared strings SharedStringTablePart sharedStringsPart = workbook.WorkbookPart.SharedStringTablePart; IEnumerable&lt;Text&gt; sharedStringTextElements = sharedStringsPart.SharedStringTable.Descendants&lt;Text&gt;(); DoReplace(sharedStringTextElements); // Replace inline strings IEnumerable&lt;WorksheetPart&gt; worksheetParts = workbook.GetPartsOfType&lt;WorksheetPart&gt;(); foreach (var worksheet in worksheetParts) { DoReplace(worksheet.Worksheet.Descendants&lt;Text&gt;()); } int z = 40; foreach (System.Data.DataRow row in ExcelWorkXLSX.ToOut.Rows) { for (int i = 0; i &lt; row.ItemArray.Count(); i++) { ExcelWorkXLSX.InsertText(workbook, row.ItemArray.ElementAt(i).ToString(), getColumnName(i), Convert.ToUInt32(z)); } z++; } } } } </code></pre> <p>But this fragment to output DataTable slooooooooooooooooooooooowwwwwww...</p> <p>How can I export DataTable to Excel fast and truly?</p>
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      1. USRandall Kwiatkowski
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    1. CODo you need to use the open xml sdk?
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    2. COHmm... No, but open xml sdk fast read/write excel files. In my program i reading xlsx files, grabbing data to datagridview (using DataTable), recheck data. Firstly i used interop, but it need excel and very slow. My problem is only export. But, I would't want to rewrite a lot of code at this moment :)
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