我想创建工作簿,然后使用EPPlus写入数据。当我创建新工作簿时,它可以成功创建。但是,当我想向该工作表中写入一些数据时,它失败了,并且错误提示
该进程无法访问文件“文件名”,因为它正在
由另一个进程使用。
我已经处置了以前的ExcelPackage,但是在写入数据时仍然显示错误。
//Create new Workbook
private void PengisianBaruBW_DoWork(object sender, DoWorkEventArgs e)
{
this.Invoke(new MethodInvoker(delegate
{
SetPengisianBtn.Enabled = false;
}));
FileInfo filePath = new FileInfo("D:\\Data Pengisian SLA Surabaya\\" + day + "_" + date + ".xlsx");
if (File.Exists(filePath.ToString()))
{
File.Delete(filePath.ToString());
}
using (ExcelPackage pck = new ExcelPackage(filePath))
{
var schedule = pck.Workbook.Worksheets.Add("Schedule");
var cart = pck.Workbook.Worksheets.Add("Cartridge");
var unsche = pck.Workbook.Worksheets.Add("Unschedule");
var rekap = pck.Workbook.Worksheets.Add("Rekap");
//My Code here
pck.SaveAs(filePath);
pck.Dispose(); //I have disposed ExcelPakcage here
}
}
//Write Data to Excel File
private void PrintScheduleBtn_Click(object sender, EventArgs e)
{
if (StaffATB.Text != "" && HelperTeamATB.Text != "" && StaffBTB.Text != "" && HelperTeamBTB.Text != "" && StaffCTB.Text != "" && HelperTeamCTB.Text != "" && StaffDTB.Text != "" && HelperTeamDTB.Text != "")
{
DialogResult dialogResult = MessageBox.Show("Apakah Anda yakin ingin menyimpan jadwal pengisian ?", "", MessageBoxButtons.YesNo);
if (dialogResult == DialogResult.Yes)
{
FileInfo file = new FileInfo("D:\\Data Pengisian SLA Surabaya\\" + day + "_" + date + ".xlsx");
using (ExcelPackage pck = new ExcelPackage(file)) //error here
{
var rekap = pck.Workbook.Worksheets["Rekap"];
var data = pck.Workbook.Worksheets["Data"];
//my code to write data here
pck.SaveAs(file);
pck.Dispose();
}
}
}
else
{
MessageBox.Show("Silakan isi PIC terlebih dahulu !");
}
}
我已添加此代码来检查我的excel文件是否处于活动状态。但是错误仍然存在。我设置了断点,并且看到流值为null,这表明我的excel文件已关闭。但是,为什么错误仍然存在?谁能帮我 ?
string file = "D:\\Data Pengisian SLA Surabaya\\" + day + "_" + date + ".xlsx";
var path = Path.Combine(Path.GetTempPath(), "D:\\Data Pengisian SLA Surabaya\\" + day + "_" + date + ".xlsx");
var tempfile = new FileInfo(path);
FileStream stream = null;
try
{
stream = tempfile.Open(FileMode.Open, FileAccess.ReadWrite, FileShare.None);
}
catch (IOException)
{
}
finally
{
if (stream != null)
stream.Close();
}
最佳答案
我简化了您的测试片段。一切都按预期进行。您确定没有其他原因导致文件访问问题吗,例如病毒扫描程序,备份程序等,因为您也有与another question相同的基本问题。
看看下面的代码片段,尝试一下,看看它是否有效。如果不是,则问题不在代码中。
FileInfo filePath = new FileInfo("ExcelDemo.xlsx");
if (File.Exists(filePath.ToString()))
{
File.Delete(filePath.ToString());
}
using (ExcelPackage pck = new ExcelPackage(filePath))
{
var schedule = pck.Workbook.Worksheets.Add("Schedule");
var cart = pck.Workbook.Worksheets.Add("Cartridge");
var unsche = pck.Workbook.Worksheets.Add("Unschedule");
var rekap = pck.Workbook.Worksheets.Add("Rekap");
pck.SaveAs(filePath);
}
using (ExcelPackage pck = new ExcelPackage(filePath))
{
var rekap = pck.Workbook.Worksheets["Rekap"];
var schedule = pck.Workbook.Worksheets["Schedule"];
rekap.Cells[4, 1].Value = "Added data";
schedule.Cells[4, 1].Value = "Added data";
pck.SaveAs(filePath);
}
关于c# - EPPlus处置无效,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/41322136/