完整的错误信息如下System.InvalidOperationException:未在本地计算机上注册"Microsoft.Jet.OLEDB.40"提供程序. ---System.Data.OleDb.OleDbException:没有可用的错误信息:REGDB_E_CLASSNOTREG(0x80040154)---内部异常堆栈跟踪的结尾---at System.Data.OleDb.OleDbConnection.CreateProviderError(Int32 hr) at System.Data.OleDb.OleDbConnection.CreateProvider(OleDbConnectionString constr) at System.Data.OleDb.OleDbConnection.Open()
at System.Data.OleDb.OleDbConnection.CreateProvider(OleDbConnectionString constr)
at System.Data.OleDb.OleDbConnection.Open()