System.TypeInitializationException FORM 访问 Class

Question

我正在做一个项目，我需要调用一个 class，我在其中创建和管理一个 excel 文件。但由于未定义的原因，我无法从我的表单中调用此函数。它 return 是一个例外：System.TypeInitializationException。我已经检查了我的 class，但我看不出有什么问题。

我想调用我的表格 Excel_Management class :

Imports System.Diagnostics
Imports System.Windows.Forms

Public Class Proc_Form

Private excel_Manage = New Excel_Management
Public Shared ok As Boolean = New Boolean

 If My.Settings.check_Directory = False Then
            If FolderBrowserDialog1.ShowDialog = DialogResult.OK Then
                My.Settings.path = FolderBrowserDialog1.SelectedPath
                My.Settings.check_Directory = True
                'My.Settings.Save()
                MsgBox(My.Settings.path)
                excel_Manage.check_Excel()
        End If

Excel_Management class :

Imports Microsoft.Office.Interop
Imports Microsoft.Office.Interop.Excel
Imports System.Windows.Forms
Imports System.Text.RegularExpressions
Imports System.String

Public Class Excel_Management
    Public Shared appExcel As Excel.Application = New Excel.Application
    Public Shared wsExcel As Excel.Worksheet = New Excel.Worksheet
    Public Shared wbExcel As Excel.Workbook = New Excel.Workbook
    Public Shared file_name As String = "Name" & DateTime.Now.ToString("yyyy") & ".xls"
    Public Shared sheet_name As String = "S " & DatePart(DateInterval.WeekOfYear, Now())
    Public Shared check_test As Boolean = False
    Public Shared excel_check As New Proc_Form
    Public Shared misValue As Object = System.Reflection.Missing.Value
    Public Shared message, title, defaultValue As String
    Public Shared myValue As Object = New Object
    Public Shared i As Integer = 1
    Public Shared match As Match = Regex.Match(myValue, "[^a-z0-9]")

Shared Sub check_Excel()
        If appExcel Is Nothing Then
            MsgBox("No Excel Detected !")
            Return
        Else
            create_Excel()
        End If
    End Sub

你能从我的代码中看到任何不允许我访问我的 excel class 的问题吗？

提前致谢。

Answer 1

我认为问题在于您无法按照您的方式创建 New Excel.Workbook，因为它是一个界面。

试试看：

Public Shared wbExcel As Excel.Workbook = appExcel.Workbooks.Add(System.Reflection.Missing.Value)

来自此处：Strange error on Excel Workbook input，或该问题的其他解决方案之一。

此外，您的 Regex.Match 无法匹配对象。我不知道 myValue 是什么，但一个选项可能是：

Regex.Match(myValue.ToString, "[^a-z0-9]")

最后，如果您让 Visual Studio 中的调试器中断这些错误，您将很容易发现这些错误。转到 "DEBUG" 菜单 > "Exceptions..." 并在 "Thrown" 列中的 "Common Language Runtime Exceptions" 旁边打勾。这应该可以帮助您调试任何其他错误。

System.TypeInitializationException FORM 访问 Class

System.TypeInitializationException FORM access to Class

.net

excel

vb.net

exception

typeinitializeexception