4/25/2023 0 Comments Free xlsx to csv converterSee the end of this message for details on invoking Re: Don't use string copy functions to add the content to temporary variables! They have a very bad performance. MessageBox.Show("File converted successfully") String output = textBox2.Text "\\" textBox3.Text ".csv" įor (int intRowCounter = 0 intRowCounter < lstInput.Count -1 intRowCounter ) sheets in excel file becomes tables in dataset Below the list example for convertToCSV : Use a list instead or write direct to the stream. On a 3 MB file with 85.000 lines it took half an hour to convert with your code. You can improve the performance by factor 1000000 or more on big files by avoiding the use of string copy functions. StreamWriter csv = new StreamWriter(output, false) Ĭonsole.WriteLine("File already exists!") ĭon't use string copy functions to add the content to temporary variables! They have a very bad performance. ![]() IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream) ĭataSet result = excelReader.AsDataSet() įor (int i = 0 i < i )įor (int j = 0 j < j ) Reading from a OpenXml Excel file (2007 format *.xlsx) Get it right dudeįileStream stream = FileMode.Open, FileAccess.Read) I would rate this article higher if it was working. ' ' What should i write here to get data?ĭim csv As StreamWriter = New StreamWriter(csvPath, False)Īndrew sin () 24-Feb-14 5:52 ' Dim excelReader As IExcelDataReader = ExcelReaderFactory.CreateOpenXmlReader(stream)ĮxcelReader.IsFirstRowAsColumnNames = Trueĭim result As DataSet = excelReader.AsDataSet() ![]() csv"ĭim stream As FileStream = File.Open(excelPath, FileMode.Open, FileAccess.Read)ĭim excelReader As IExcelDataReader = ExcelReaderFactory.CreateBinaryReader(stream) Dim Upath As String = " ~/Uploads/" CDate(Today.Date).ToString( " yyyyMMdd")ĭim excelPath As String = Server.MapPath(Upath " /BKP/") Path.GetFileName()ĭim csvPath As String = Server.MapPath(Upath) " /" Path.GetFileNameWithoutExtension() ".
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