是否有可能只有一个进程执行WRITE而许多进程在excel文件上执行READ操作?我正在使用ExcelPackage(EPPlus).
为了演示,我编写了两个控制台应用程序,用于迭代编写,另一个用于阅读.同时运行它们会导致任何一方出现故障.
写
// simply write to a column var fileLocation = "D:\\Book.xlsx"; FileInfo fi = new FileInfo(fileLocation); int i = 1; while (1 == 1) //ALERT: an infinite loop! { using (ExcelPackage excelPackage = new ExcelPackage(fi)) { ExcelWorksheet worksheet = excelPackage.Workbook.Worksheets["Sheet1"]; var row = worksheet.Row(2); worksheet.Cells[$"A{i}"].Value = "Test " + i.ToString(); excelPackage.Save(); i++; } }
读
//simply populate a list reading excel var fileLocation = "D:\\Book.xlsx"; FileInfo fi = new FileInfo(fileLocation); List<string> list = new List<string>(); ExcelWorksheet worksheet = null; int i = 1; while (1 == 1) //ALERT: an infinite loop! { using (ExcelPackage excelPackage = new ExcelPackage(fi)) { worksheet = excelPackage.Workbook.Worksheets["Sheet1"]; if (worksheet.Cells[i,1].Value != null) { list.Add(worksheet.Cells[i,1].Value.ToString()); } } list.Clear(); }
解决方法
在阅读时,您无法同时读取和写入相同的文件.您可以将整个文件读入内存,然后您可以处理它,处理后您可以将其写回.