Mono在尝试连接到MySQL数据库时抛出异常

问题描述：

我有一个简单的应用程序（.NET 4.5.2），它使用.NET/Mono的MySQL驱动程序（v6.9.8）。它在.NET（Windows）上完美工作，但一旦调用Connect-method，就会在Ubuntu（Mono v4.2.1）上引发异常。Mono在尝试连接到MySQL数据库时抛出异常

2016-06-21 16:21:19,659 [1] WARN MySql.DatabaseDriverMySql [(null)] - System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.IO.FileNotFoundException: Could not load file or assembly 'System.Management, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. 
File name: 'System.Management, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' 
    at System.Reflection.MonoProperty.GetterAdapterFrame[T,R] (System.Reflection.Getter`2 getter, System.Object obj) <0x7f65f01aece0 + 0x00039> in <filename unknown>:0 
    at System.Reflection.MonoProperty.GetValue (System.Object obj, System.Object[] index) <0x7f65f01aef20 + 0x000d9> in <filename unknown>:0 
    --- End of inner exception stack trace --- 
    at System.Reflection.MonoProperty.GetValue (System.Object obj, System.Object[] index) <0x7f65f01aef20 + 0x00117> in <filename unknown>:0 
    at MySql.Data.MySqlClient.NativeDriver.SetConnectAttrs() <0x40e6a2f0 + 0x00138> in <filename unknown>:0 
    at MySql.Data.MySqlClient.Authentication.MySqlAuthenticationPlugin.Authenticate (Boolean reset) <0x40e69830 + 0x0016b> in <filename unknown>:0 
    at MySql.Data.MySqlClient.NativeDriver.Authenticate (System.String authMethod, Boolean reset) <0x40e68320 + 0x000af> in <filename unknown>:0 
    at MySql.Data.MySqlClient.NativeDriver.Open() <0x40e5c9d0 + 0x00787> in <filename unknown>:0 
    at MySql.Data.MySqlClient.Driver.Open() <0x40e5c980 + 0x0003b> in <filename unknown>:0 
    at MySql.Data.MySqlClient.Driver.Create (MySql.Data.MySqlClient.MySqlConnectionStringBuilder settings) <0x40e56be0 + 0x00173> in <filename unknown>:0 
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.IO.FileNotFoundException: Could not load file or assembly 'System.Management, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. 
File name: 'System.Management, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' 
    at System.Reflection.MonoProperty.GetterAdapterFrame[T,R] (System.Reflection.Getter getter, System.Object obj) <0x7f65f01aece0 + 0x00039> in <filename unknown>:0 
    at System.Reflection.MonoProperty.GetValue (System.Object obj, System.Object[] index) <0x7f65f01aef20 + 0x000d9> in <filename unknown>:0 
    --- End of inner exception stack trace --- 
    at System.Reflection.MonoProperty.GetValue (System.Object obj, System.Object[] index) <0x7f65f01aef20 + 0x00117> in <filename unknown>:0 
    at MySql.Data.MySqlClient.NativeDriver.SetConnectAttrs() <0x40e6a2f0 + 0x00138> in <filename unknown>:0 
    at MySql.Data.MySqlClient.Authentication.MySqlAuthenticationPlugin.Authenticate (Boolean reset) <0x40e69830 + 0x0016b> in <filename unknown>:0 
    at MySql.Data.MySqlClient.NativeDriver.Authenticate (System.String authMethod, Boolean reset) <0x40e68320 + 0x000af> in <filename unknown>:0 
    at MySql.Data.MySqlClient.NativeDriver.Open() <0x40e5c9d0 + 0x00787> in <filename unknown>:0 
    at MySql.Data.MySqlClient.Driver.Open() <0x40e5c980 + 0x0003b> in <filename unknown>:0 
    at MySql.Data.MySqlClient.Driver.Create (MySql.Data.MySqlClient.MySqlConnectionStringBuilder settings) <0x40e56be0 + 0x00173> in <filename unknown>:0

我们正在谈论mono-mac吗？或者是这个ios/android？ –

答

无法加载文件或程序集“System.Management，版本= 4.0.0.0

System.Management是仅适用于Windows的库。如果MySQL连接器驱动程序突然开始依赖于这个库，这是非常糟糕的。 IIRC Mysql .NET连接器一直与Mono一起工作，所以我们需要将此问题报告为回归。

MySQL .NET Driver的最后一个工作版本是6.4.6，因为6.5.7似乎不再适用于Mono ......有点奇怪，因为MySQL说这些是单声道驱动程序！？ – Wiesi

请将其报告给Oracle/Mysql的错误跟踪系统 – knocte

答

向MySQL报告错误。链接：https://bugs.mysql.com/bug.php?id=81973

Mono在尝试连接到MySQL数据库时抛出异常

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