实现EXCEL导入功能：web网站，excel导入用OLEDB同样会报错：未在本地计算机上注册“Microsoft.Jet.OLEDB.4.0”提供程序
报错信息：
Exception caught.System.InvalidOperationException: 未在本地计算机上注册“Microsoft.Jet.OLEDB.4.0”提供程序。 在 System.Data.OleDb.OleDbServicesWrapper.GetDataSource(OleDbConnectionString constr, DataSourceWrapper& datasrcWrapper) 在 System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection) 在 System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) 在 System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions) 在 System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) 在 System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) 在 System.Data.ProviderBase.DbConnectionInternal.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) 在 System.Data.OleDb.OleDbConnection.Open() 在 BatchImportEntryTable.ChangeExcelToData(String path, String sheet, String[] field)
解决方法：
使用OLEDB是要付出代价的，可考虑 使用NPOI，不需要任何设置~
