See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text **************
System.InvalidOperationException: The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine.
at System.Data.OleDb.OleDbServicesWrapper.GetDataSource(OleDbConnectionString constr, DataSourceWrapper& datasrcWrapper)
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.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource1 retry, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionInternal.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.OleDb.OleDbConnection.Open()
at cstest.myMDB.openMDB() in D:\练习系统\对口练习系统20220112\cstest32\Class1.cs:line 239
at cstest.myMDB.myDoNonSelect() in D:\练习系统\对口练习系统20220112\cstest32\Class1.cs:line 282
at cstest.login.btnSend_Click(Object sender, EventArgs e) in D:\练习系统\对口练习系统20220112\cstest32\login.cs:line 117
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.F
重点检查，这几个文件的代码
at cstest.myMDB.openMDB() in D:\练习系统\对口练习系统20220112\cstest32\Class1.cs:line 239
at cstest.myMDB.myDoNonSelect() in D:\练习系统\对口练习系统20220112\cstest32\Class1.cs:line 282
at cstest.login.btnSend_Click(Object sender, EventArgs e) in D:\练习系统\对口练习系统20220112\cstest32\login.cs:line 117