我收到類型初始值設定項異常，無法找出問題所在

Question

當我啟動應用程序時，我得到了異常信息，那是什么？

異常在構造函數中：

checkBox1.Checked = Options_DB.Get_Automatic_Start();

這是options_db類，但我在那里使用了一個斷點，但它從未到達options_db

這是在form1中引發異常的構造函數：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using DannyGeneral;
using System.Drawing.Drawing2D;

namespace Batch_Images_Convertion
{
    public partial class Form1 : Form
    {
        int i;
        bool cancel_;
        bool automatic_;
        public Form1()
        {

            InitializeComponent();
            i = 0;
            automatic_ = false;
            checkBox1.Checked = Options_DB.Get_Automatic_Start();

它永遠不會超出這一界限。

這是異常錯誤消息：

System.TypeInitializationException was unhandled
  Message=The type initializer for 'Batch_Images_Convertion.Options_DB' threw an exception.
  Source=Batch_Images_Convertion
  TypeName=Batch_Images_Convertion.Options_DB
  StackTrace:
       at Batch_Images_Convertion.Options_DB.Get_Automatic_Start()
       at Batch_Images_Convertion.Form1..ctor() in D:\C-Sharp\Batch_Images_Convertion\Batch_Images_Convertion\Batch_Images_Convertion\Form1.cs:line 26
       at Batch_Images_Convertion.Program.Main() in D:\C-Sharp\Batch_Images_Convertion\Batch_Images_Convertion\Batch_Images_Convertion\Program.cs:line 18
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: System.IO.DirectoryNotFoundException
       Message=Could not find a part of the path 'C:\Users\Chocolade\AppData\Local\Microsoft\Batch_Images_Convertion\settings\settings_convertion.txt'.
       Source=mscorlib
       StackTrace:
            at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
            at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath)
            at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)
            at System.IO.File.Create(String path)
            at DannyGeneral.OptionsFile..ctor(String settings) in D:\C-Sharp\Batch_Images_Convertion\Batch_Images_Convertion\Batch_Images_Convertion\OptionsFile.cs:line 72
            at Batch_Images_Convertion.Options_DB..cctor() in D:\C-Sharp\Batch_Images_Convertion\Batch_Images_Convertion\Batch_Images_Convertion\Options_DB.cs:line 25
       InnerException: 

Answer 1

看起來它試圖加載文件'C:\\Users\\Chocolade\\AppData\\Local\\Microsoft\\Batch_Images_Convertion\\settings\\settings_convertion.txt'但目錄settings不存在。

在構造函數中，通過執行以下操作來檢查目錄是否存在：

Directory.Exists(@"path\to\your\folder")

嘗試訪問文件之前。