FileStream stream = File.Open(opFile.FileName, FileMode.Open, FileAccess.Read); IExcelDataReader excelReader; if (FileExtension == "xlsx") excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream); else excelReader = ExcelReaderFactory.CreateBinaryReader(stream); excelReader.IsFirstRowAsColumnNames = true; DataSet dsresult = excelReader.AsDataSet();
var
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