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  1. PO
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    <p>OK I've finally found solution from here: <a href="http://www.codeproject.com/Articles/32370/Import-Excel-File-to-DataSet#xx" rel="noreferrer">http://www.codeproject.com/Articles/32370/Import-Excel-File-to-DataSet#xx</a></p> <p>Below sample code little adopted to my needs.</p> <pre><code>public static class XMLtoDataTable { private static ColumnType getDefaultType() { return new ColumnType(typeof(String)); } struct ColumnType { public Type type; private string name; public ColumnType(Type type) { this.type = type; this.name = type.ToString().ToLower(); } public object ParseString(string input) { if (String.IsNullOrEmpty(input)) return DBNull.Value; switch (type.ToString()) { case "system.datetime": return DateTime.Parse(input); case "system.decimal": return decimal.Parse(input); case "system.boolean": return bool.Parse(input); default: return input; } } } private static ColumnType getType(XmlNode data) { string type = null; if (data.Attributes["ss:Type"] == null || data.Attributes["ss:Type"].Value == null) type = ""; else type = data.Attributes["ss:Type"].Value; switch (type) { case "DateTime": return new ColumnType(typeof(DateTime)); case "Boolean": return new ColumnType(typeof(Boolean)); case "Number": return new ColumnType(typeof(Decimal)); case "": decimal test2; if (data == null || String.IsNullOrEmpty(data.InnerText) || decimal.TryParse(data.InnerText, out test2)) { return new ColumnType(typeof(Decimal)); } else { return new ColumnType(typeof(String)); } default://"String" return new ColumnType(typeof(String)); } } public static DataSet ImportExcelXML (string fileName, bool hasHeaders, bool autoDetectColumnType) { StreamReader sr = new StreamReader( fileName); Stream st = (Stream) sr.BaseStream; return ImportExcelXML( st, hasHeaders, autoDetectColumnType); } private static DataSet ImportExcelXML(Stream inputFileStream, bool hasHeaders, bool autoDetectColumnType) { XmlDocument doc = new XmlDocument(); doc.Load(new XmlTextReader(inputFileStream)); XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable); nsmgr.AddNamespace("o", "urn:schemas-microsoft-com:office:office"); nsmgr.AddNamespace("x", "urn:schemas-microsoft-com:office:excel"); nsmgr.AddNamespace("ss", "urn:schemas-microsoft-com:office:spreadsheet"); DataSet ds = new DataSet(); foreach (XmlNode node in doc.DocumentElement.SelectNodes("//ss:Worksheet", nsmgr)) { DataTable dt = new DataTable(node.Attributes["ss:Name"].Value); ds.Tables.Add(dt); XmlNodeList rows = node.SelectNodes("ss:Table/ss:Row", nsmgr); if (rows.Count &gt; 0) { //************************* //Add Columns To Table from header row //************************* List&lt;ColumnType&gt; columns = new List&lt;ColumnType&gt;(); int startIndex = 0; if (hasHeaders) { foreach (XmlNode data in rows[0].SelectNodes("ss:Cell/ss:Data", nsmgr)) { columns.Add(new ColumnType(typeof(string)));//default to text dt.Columns.Add(data.InnerText, typeof(string)); } startIndex++; } //************************* //Update Data-Types of columns if Auto-Detecting //************************* if (autoDetectColumnType &amp;&amp; rows.Count &gt; 0) { XmlNodeList cells = rows[startIndex].SelectNodes("ss:Cell", nsmgr); int actualCellIndex = 0; for (int cellIndex = 0; cellIndex &lt; cells.Count; cellIndex++) { XmlNode cell = cells[cellIndex]; if (cell.Attributes["ss:Index"] != null) actualCellIndex = int.Parse(cell.Attributes["ss:Index"].Value) - 1; ColumnType autoDetectType = getType(cell.SelectSingleNode("ss:Data", nsmgr)); if (actualCellIndex &gt;= dt.Columns.Count) { dt.Columns.Add("Column" + actualCellIndex.ToString(), autoDetectType.type); columns.Add(autoDetectType); } else { dt.Columns[actualCellIndex].DataType = autoDetectType.type; columns[actualCellIndex] = autoDetectType; } actualCellIndex++; } } //************************* //Load Data //************************* for (int i = startIndex; i &lt; rows.Count; i++) { DataRow row = dt.NewRow(); XmlNodeList cells = rows[i].SelectNodes("ss:Cell", nsmgr); int actualCellIndex = 0; for (int cellIndex = 0; cellIndex &lt; cells.Count; cellIndex++) { XmlNode cell = cells[cellIndex]; if (cell.Attributes["ss:Index"] != null) actualCellIndex = int.Parse(cell.Attributes["ss:Index"].Value) - 1; XmlNode data = cell.SelectSingleNode("ss:Data", nsmgr); if (actualCellIndex &gt;= dt.Columns.Count) { for (int ii = dt.Columns.Count; ii &lt; actualCellIndex; ii++) { dt.Columns.Add("Column" + actualCellIndex.ToString(), typeof(string));columns.Add(getDefaultType()); } // ii ColumnType autoDetectType = getType(cell.SelectSingleNode("ss:Data", nsmgr)); dt.Columns.Add("Column" + actualCellIndex.ToString(), typeof(string)); columns.Add(autoDetectType); } if (data != null) row[actualCellIndex] = data.InnerText; actualCellIndex++; } dt.Rows.Add(row); } } } return ds; } } </code></pre>
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    1. POHow to read Excel XML (C#)
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