C# OLEDB 数据库连接使用 Access 2016

Question

不幸的是，我一直在尝试使用 OLEDB 和 Access 2016 建立数据库连接，但我不断返回错误：

    System.Data.OleDb.OleDbException was unhandled
  ErrorCode=-2147467259
  HResult=-2147467259
  Message=Not a valid file name.
  Source=Microsoft Office Access Database Engine
  StackTrace:
       at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection)
       at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject)
       at System.Data.ProviderBase.DbConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
       at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions)
       at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
       at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
       at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
       at System.Data.ProviderBase.DbConnectionInternal.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
       at System.Data.OleDb.OleDbConnection.Open()
       at Program_V1._0.Form1..ctor() in C:\Users\Tom\Documents\College\Computer_Science_Project _2017_Ver2.0\Program_Files\Program_V1.0\Program_V1.0\Form1.cs:line 24
       at Program_V1._0.Program.Main() in C:\Users\Tom\Documents\College\Computer_Science_Project _2017_Ver2.0\Program_Files\Program_V1.0\Program_V1.0\Program.cs:line 19
       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.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException:

来自这段代码：

    //Database Connection
    OleDbConnection connection = new OleDbConnection();
    connection.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=‪C:\Users\Tom\Documents\College\Computer_Science_Project _2017_Ver2.0\Program_Files\Program_V1.0\Program_V1.0\Databases\DecodeTimes.accdb;
    Persist Security Info=False;";
    connection.Open();
    label3.Text = " - Database Connected - ";
    connection.Close();

尽我所能，即使阅读了有关兼容性的问题，我也看不出有任何问题，我们将不胜感激。

Answer 1

当我复制您的连接字符串并将其粘贴到设置为 "ANSI" 编码的 Notepad++ 中时，我看到了

... Data Source=?C:\ ...

这告诉我您的连接字符串包含非 ANSI 字符。进一步调查表明，神秘字符（上面显示为?）实际上是不可见的Unicode字符U+202A（LEFT-TO-RIGHT EMBEDDING）。从连接字符串中删除该不可见字符应该可以解决问题。

C# OLEDB 数据库连接使用 Access 2016

C# OLEDB Database Connection Using Access 2016

c#

database

oledb

ms-access

visual-studio-2015