Question

当我点击红色X按钮关闭表单时，我有以下代码应该在后台工作程序中运行：

Private Sub Form1_FormClosed(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles MyBase.FormClosed
    picLoading.Visible = True
    tblMain.Visible = False
    bwQuitNoSave.RunWorkerAsync()

End Sub

Private Sub bwQuitNoSave_DoWork(sender As Object, e As System.ComponentModel.DoWorkEventArgs) Handles bwQuitNoSave.DoWork
    'If at least one sheet has been opened, close the workbook
    If FirstLoad = 2 Then
        worksheet.Cells(1, 31).Value = ""
        workbook.Save()
        workbook.Close(False)
    End If
End Sub

Private Sub bwQuitNoSave_RunWorkerCompleted(sender As Object, e As RunWorkerCompletedEventArgs) Handles bwQuitNoSave.RunWorkerCompleted
    'Exit the application
    APP.Quit()
End Sub

所以应该发生的是应用程序检查是否为整数= 2，如果是，则保存工作簿，关闭它，然后退出应用程序。但是，当我运行此代码时，即使应用程序关闭，excel进程也会保持打开状态。

在我的应用程序的上一次迭代中，我正在使用正常运行的代码（例如，关闭了excel进程）：

Private Sub Form1_FormClosed(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles MyBase.FormClosed

   picLoading.Visible = True
   tblMain.Visible = False

   'If at least one sheet has been opened, close the workbook
   If FirstLoad = 2 Then
       worksheet.Cells(1, 31).Value = ""
       workbook.Save()
       workbook.Close(False)
   End If
   'Exit the application
       APP.Quit()

End Sub

有人看到我遗失的东西吗？

我也试过了，这个过程仍然是开放的：

 Private Sub bwQuitNoSave_DoWork(sender As Object, e As System.ComponentModel.DoWorkEventArgs) Handles bwQuitNoSave.DoWork
        'If at least one sheet has been opened, close the workbook
        If FirstLoad = 2 Then
            worksheet.Cells(1, 31).Value = ""
            workbook.Save()
            workbook.Close(False)
        End If
    Try
        workbook.Close(False)
        APP.Quit()
    Catch
        APP.Quit()
    End Try
    End Sub

    Private Sub bwQuitNoSave_RunWorkerCompleted(sender As Object, e As RunWorkerCompletedEventArgs) Handles bwQuitNoSave.RunWorkerCompleted
        'Exit the application
        releaseMemory(APP)
        releaseMemory(worksheet)
        releaseMemory(workbook)

    End Sub

    Private Sub releaseMemory(ByVal obj As Object)
        Try
            System.Runtime.InteropServices.Marshal.ReleaseComObject(obj)
            obj = Nothing
        Catch ex As Exception
            obj = Nothing
        Finally
            GC.Collect()
        End Try
    End Sub

经过多次尝试后解决了这个问题：

Private Sub Form1_FormClosing(sender As Object, e As FormClosingEventArgs) Handles MyBase.FormClosing
    If e.CloseReason = CloseReason.UserClosing Then
        e.Cancel = True
        picLoading.Visible = True
        tblMain.Visible = False
        If FirstLoad = 2 Then
            worksheet.Cells(1, 31).Value = ""
            bwQuitNoSave.RunWorkerAsync()
        Else
            Quit()
        End If
    End If
End Sub
Public Sub Quit()
    APP.Quit()
    GC.Collect()
    GC.WaitForPendingFinalizers()
    GC.Collect()
    GC.WaitForPendingFinalizers()
    Application.Exit()
End Sub
Private Sub bwQuitNoSave_DoWork(sender As Object, e As System.ComponentModel.DoWorkEventArgs) Handles bwQuitNoSave.DoWork
    'If at least one sheet has been opened, close the workbook
    workbook.Save()
End Sub

Private Sub bwQuitNoSave_RunWorkerCompleted(sender As Object, e As RunWorkerCompletedEventArgs) Handles bwQuitNoSave.RunWorkerCompleted
    Quit()
End Sub

事实证明关键是通过红色X取消退出并手动关闭应用程序。

关闭在背景工作者的Excel

0 个答案: