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    <pre><code>public class ExcelHeaderValues { public static string CUSIP = "CUSIP"; public static string ORIG = "ORIG"; public static string PRICE = "PRICE"; public static int COLUMNCOUNT = 3; } public class ExcelParser { private ArrayList collOutput = null; string sSheetName = String.Empty; string[] strValidColumn; int validRowCnt = 0; string sColumnPositions = String.Empty; OleDbCommand ExcelCommand; OleDbDataAdapter ExcelAdapter; OleDbConnection ExcelConnection = null; DataSet dsSheet = null; string path = string.Empty; string identifier = string.Empty; public ExcelParser() { collOutput = new ArrayList(); } public void Extract() { bool headermatch = false; string strCusip = string.Empty, strOrig = string.Empty, strPrice = string.Empty, strData = string.Empty; string strCusipPos = string.Empty, strPricePos = string.Empty, strOrigPos = string.Empty; string strColumnHeader = String.Empty; int reqColcount = 0; string[] strTemp; bool bTemp = false; bool validRow = false; DataTable schemaTable = GetSchemaTable(); validRowCnt = 0; foreach (DataRow dr in schemaTable.Rows) { if (dsSheet != null) { dsSheet.Reset(); dsSheet = null; } strCusipPos = string.Empty; strOrigPos = string.Empty; strPricePos = string.Empty; if (isValidSheet(dr)) { sColumnPositions = string.Empty; validRowCnt = 0; foreach (DataRow dataRow in dsSheet.Tables[0].Rows) { sColumnPositions = string.Empty; if (headermatch == false) { sColumnPositions = string.Empty; foreach (DataColumn column in dsSheet.Tables[0].Columns) { strColumnHeader = dataRow[column.ColumnName].ToString().ToUpper().Trim(); strColumnHeader = strColumnHeader.ToUpper(); if (strColumnHeader == ExcelHeaderValues.ORIG.ToUpper() || strColumnHeader == ExcelHeaderValues.CUSIP.ToUpper() || strColumnHeader == ExcelHeaderValues.PRICE.ToUpper()) { bTemp = true; validRow = true; reqColcount = ExcelHeaderValues.COLUMNCOUNT; } if (bTemp) { bTemp = false; sColumnPositions += column.ColumnName + "^" + strColumnHeader + ";"; } } strValidColumn = sColumnPositions.Trim().Split(';'); if (validRow == true &amp;&amp; reqColcount == strValidColumn.Length - 1) { headermatch = true; break; } validRowCnt++; } } if (headermatch == true) { try { if (dsSheet.Tables[0].Rows.Count &gt; 0) { if (strValidColumn.Length &gt; 0) { for (int i = 0; i &lt; strValidColumn.Length - 1; i++) { if (strValidColumn[i].ToUpper().Contains("CUSIP")) { strTemp = strValidColumn[i].ToString().Split('^'); strCusipPos = strTemp[0].ToString(); strTemp = null; } if (strValidColumn[i].ToUpper().Contains("PRICE")) { strTemp = strValidColumn[i].ToString().Split('^'); strPricePos = strTemp[0].ToString(); strTemp = null; } if (strValidColumn[i].ToUpper().Contains("ORIG")) { strTemp = strValidColumn[i].ToString().Split('^'); strOrigPos = strTemp[0].ToString(); strTemp = null; } } } for (int iData = validRowCnt; iData &lt; dsSheet.Tables[0].Rows.Count; iData++) { if (strCusipPos.Trim() != "") strCusip = dsSheet.Tables[0].Rows[iData][strCusipPos].ToString().Trim(); if (strOrigPos.Trim() != "") strOrig = dsSheet.Tables[0].Rows[iData][strOrigPos].ToString().Trim(); if (strPricePos.Trim() != "") strPrice = dsSheet.Tables[0].Rows[iData][strPricePos].ToString().Trim().ToUpper(); strData = ""; if (strCusip.Length == 9 &amp;&amp; strCusip != "" &amp;&amp; strPrice != "" &amp;&amp; strOrig != "" &amp;&amp; !strPrice.ToUpper().Contains("SOLD")) strData = strCusip + "|" + Convert.ToDouble(strOrig) * 1000000 + "|" + strPrice + "|||||"; if (strData != null &amp;&amp; strData != "") collOutput.Add(strData); strCusip = string.Empty; strOrig = string.Empty; strPrice = string.Empty; strData = string.Empty; } } } catch (Exception ex) { throw ex; } } headermatch = false; sColumnPositions = string.Empty; strColumnHeader = string.Empty; } } } private bool isValidSheet(DataRow dr) { bool isValidSheet = false; sSheetName = dr[2].ToString().ToUpper(); if (!(sSheetName.Contains("$_")) &amp;&amp; !(sSheetName.Contains("$'_")) &amp;&amp; (!sSheetName.Contains("Print_Titles".ToUpper())) &amp;&amp; (dr[3].ToString() == "TABLE" &amp;&amp; ((!sSheetName.Contains("Print_Area".ToUpper())))) &amp;&amp; !(sSheetName.ToUpper() == "DLOFFERLOOKUP")) { if (sSheetName.Trim().ToUpper() != "Disclaimer$".ToUpper() &amp;&amp; sSheetName.Trim().ToUpper() != "Summary$".ToUpper() &amp;&amp; sSheetName.Trim().ToUpper() != "FORMULAS$" ) { string sQry = string.Empty; sQry = "SELECT * FROM [" + sSheetName + "]"; ExcelCommand = new OleDbCommand(sQry, ExcelConnection); dsSheet = new DataSet(); ExcelAdapter = new OleDbDataAdapter(ExcelCommand); isValidSheet = false; try { ExcelAdapter.Fill(dsSheet, sSheetName); isValidSheet = true; } catch (Exception ex) { isValidSheet = false; throw new Exception(ex.Message.ToString()); } finally { ExcelAdapter = null; ExcelCommand = null; } } } return isValidSheet; } private DataTable GetSchemaTable() { DataTable dt = null; string connectionString = String.Empty; connectionString = GetConnectionString(); ExcelConnection = new OleDbConnection(connectionString); try { ExcelConnection.Open(); dt = ExcelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" }); } catch (Exception ex) { throw ex; } return dt; } private string GetConnectionString() { string connStr = String.Empty; try { if (path.ToLower().Contains(".xlsx")) { connStr = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source='" + path + "';" + "Extended Properties='Excel 12.0;HDR=No;IMEX=1;'"; } else if (path.ToLower().Contains(".xlsm")) { connStr = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source='" + path + "';" + "Extended Properties='Excel 12.0 Macro;HDR=No;IMEX=1;'"; } else if (path.ToLower().Contains(".xls")) { connStr = "provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + path + "';Extended Properties='Excel 8.0;HDR=No;IMEX=1;'"; } else {connStr = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source='" + path + "';" + "Extended Properties='HTML Import;IMEX=1;HDR=No;'"; } } catch (Exception ex) { throw ex; } return connStr; } } </code></pre>
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