如果首先打开工作表，vb.net 无法读取 excel 工作表答案

【问题标题】：vb.net cannot read excel sheet if sheet is open first如果首先打开工作表，vb.net 无法读取 excel 工作表
【发布时间】：2014-12-16 13:53:48
【问题描述】：

我的工作簿在加载表单之前已打开。

在excel中使用vba，这段代码可以正常工作：

 wbListPath = "C:\WAREHOUSE CONTROL ----- DO NOT DELETE\"
 wbListName = "WAREHOUSE CONTROL FORM ----- DO NOT DELETE.xlsm"


 Set wbList = Application.Workbooks("WAREHOUSE CONTROL FORM ----- DO NOT DELETE.xlsm")

If Not BookOpen(wbList.Sheets("Directories").Cells(15, 3)) Then                    ' inventory master
    wb2 = Workbooks.Open(wbList.Sheets("Directories").Cells(15, 2) & wbList.Sheets("Directories").Cells(15, 3))    'Cambridge Master
 Else
     wbLkup = wbList.Sheets("Directories").Cells(15, 3).Text
     Set wb2 = Application.Workbooks(wbLkup)
 End If




Function BookOpen(strBookName As String) As Boolean
    Dim oBk As Workbook
    On Error Resume Next
    Set oBk = Workbooks(strBookName)
    On Error GoTo 0
    If oBk Is Nothing Then
        BookOpen = False
    Else
        BookOpen = True
    End If
End Function

切换到 vb.net，我无法使用任何代码来检测在运行 form1 之前已打开的工作簿，我能找到的最接近的是：

Private Sub Button10_Click(sender As Object, e As EventArgs) Handles Button10.Click
     Dim WorkBookNames() As String = {TextBox1.Text, TextBox1.Text & "  [Compatibility Mode]", "Microsoft Excel - 001 Phone List  [Compatibility Mode]"}
    exPhone = ChkNOpenWB(exPhone, WorkBookNames, TextBox12.Text)
    excelApp.Visible = True

End Sub

Function ChkNOpenWB(bookName As Workbook, WorkBookNames() As String, path As String) As Workbook
    Dim openFlag As Boolean = True
    For Each p As System.Diagnostics.Process In System.Diagnostics.Process.GetProcesses()
        If p.ProcessName = "EXCEL" Then
            For Each excelFile As String In WorkBookNames
                If p.MainWindowTitle.Contains(excelFile) Then
                    bookName = GetObject(TextBox12.Text & "\" & TextBox1.Text)
                    bookName.RefreshAll()
                    openFlag = False
                End If
            Next
        End If
    Next
    If (openFlag) Then
        bookName = excelApp.Workbooks.Open(TextBox12.Text & "\" & TextBox1.Text, ReadOnly:=False)
        bookName.Activate()
    End If
    Return (bookName)
End Function

【问题讨论】：

标签： vb.net excel openform

【解决方案1】：

您也可以使用编组。这将查看工作簿是否已打开。如果不是，它会打开它。如果它已经打开，则将工作簿分配给变量。

    Dim exApp AS Excel.Application = New Excel.Application
    Dim wb as excel.Workbook
    Dim exSheet As Excel.Worksheet = Nothing

    exApp.Visible = True

    wb = System.Runtime.InteropServices.Marshal.BindToMoniker(FileNamePath)
    exApp = wb.Parent

    'lets see it
    exApp.Visible = True
    exApp.Windows(1).Visible = True

    Dim tSheet As Excel.Worksheet = exApp.ActiveWorkbook.Sheets.Item(1)

【讨论】：

【解决方案2】：

您可以检查文件是否可以打开进行写入。如果在 Excel 中打开，检查将失败。

Public Shared Function FileInUse(ByVal Filename As String) As Boolean

    Dim thisFileInUse As Boolean = False
    If System.IO.File.Exists(Filename) Then
        Try
            Using f As New IO.FileStream(Filename, FileMode.Open, FileAccess.ReadWrite, FileShare.None)
                thisFileInUse = False
            End Using
        Catch
            thisFileInUse = True
        End Try
    End If
    Return thisFileInUse

End Function

【讨论】：