string sSheetName = null;
string sConnection = null;
DataTable dtTablesList = default(DataTable);
OleDbCommand oleExcelCommand = default(OleDbCommand);
OleDbDataReader oleExcelReader = default(OleDbDataReader);
OleDbConnection oleExcelConnection = default(OleDbConnection);
sConnection = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:Test.xls;Extended Properties="Excel 12.0;HDR=No;IMEX=1"";
oleExcelConnection = new OleDbConnection(sConnection);
oleExcelConnection.Open();
dtTablesList = oleExcelConnection.GetSchema("Tables");
if (dtTablesList.Rows.Count > 0)
{
sSheetName = dtTablesList.Rows[0]["TABLE_NAME"].ToString();
}
dtTablesList.Clear();
dtTablesList.Dispose();
if (!string.IsNullOrEmpty(sSheetName)) {
oleExcelCommand = oleExcelConnection.CreateCommand();
oleExcelCommand.CommandText = "Select * From [" + sSheetName + "]";
oleExcelCommand.CommandType = CommandType.Text;
oleExcelReader = oleExcelCommand.ExecuteReader();
nOutputRow = 0;
while (oleExcelReader.Read())
{
}
oleExcelReader.Close();
}
oleExcelConnection.Close();
// Using OleDb:
private static DataTable ExcelToDataTable(string fileFullPath)
{
try
{
DataTable dt = new DataTable();
string StartingColumn = "A";
string EndingColumn = "D";
string StartReadingFromRow = "1";
string HDR = "YES";
string ConStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source="
+ fileFullPath + ";Extended Properties="Excel 12.0;HDR=" + HDR + ";IMEX=0"";
OleDbConnection cnn = new OleDbConnection(ConStr);
cnn.Open();
DataTable dtSheet = cnn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
string sheetname = "";
foreach (DataRow drSheet in dtSheet.Rows)
{
if (drSheet["TABLE_NAME"].ToString().Contains("$"))
{
sheetname = drSheet["TABLE_NAME"].ToString();
OleDbCommand oconn = new OleDbCommand("select * from ["
+ sheetname + StartingColumn + StartReadingFromRow + ":" + EndingColumn + "]", cnn);
OleDbDataAdapter adp = new OleDbDataAdapter(oconn);
adp.Fill(dt);
cnn.Close();
}
}
return dt;
}
catch (Exception ex)
{
throw ex;
}
}
// ------------------------------------------------------
// using openxmlSDK:
using System.Data;
using System.Linq;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
namespace Core_Excel.Utilities
{
static class ExcelUtility
{
public static DataTable Read(string path)
{
var dt = new DataTable();
using (var ssDoc = SpreadsheetDocument.Open(path, false))
{
var sheets = ssDoc.WorkbookPart.Workbook.GetFirstChild<Sheets>().Elements<Sheet>();
var relationshipId = sheets.First().Id.Value;
var worksheetPart = (WorksheetPart) ssDoc.WorkbookPart.GetPartById(relationshipId);
var workSheet = worksheetPart.Worksheet;
var sheetData = workSheet.GetFirstChild<SheetData>();
var rows = sheetData.Descendants<Row>().ToList();
foreach (var row in rows) //this will also include your header row...
{
var tempRow = dt.NewRow();
var colCount = row.Descendants<Cell>().Count();
foreach (var cell in row.Descendants<Cell>())
{
var index = GetIndex(cell.CellReference);
// Add Columns
for (var i = dt.Columns.Count; i <= index; i++)
dt.Columns.Add();
tempRow[index] = GetCellValue(ssDoc, cell);
}
dt.Rows.Add(tempRow);
}
}
return dt;
}
private static string GetCellValue(SpreadsheetDocument document, Cell cell)
{
var stringTablePart = document.WorkbookPart.SharedStringTablePart;
var value = cell.CellValue.InnerXml;
if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString)
return stringTablePart.SharedStringTable.ChildElements[int.Parse(value)].InnerText;
return value;
}
public static int GetIndex(string name)
{
if (string.IsNullOrWhiteSpace(name))
return -1;
int index = 0;
foreach (var ch in name)
{
if (char.IsLetter(ch))
{
int value = ch - 'A' + 1;
index = value + index * 26;
}
else
break;
}
return index - 1;
}
}
}