Question

我创建了一个程序供我们在办公室计算机上使用。当他们尝试使用该程序时，它会从SqlConnection构造函数中抛出一个异常，说明“不允许注册表访问”。

我们的网络管理员限制用户访问注册表，以防止人们安装个人软件。另外，我没有必要写入事件日志。是否有一些原因要告诉SqlConnection不要尝试访问事件日志？

源代码：

string _ConnectionString = "server=our_server_name; initial catalog=our_db_name; integrated security=true;"
...
using (var connection = new SqlConnection(_ConnectionString)) <-- exception thrown here
{
    connection.Open();
    ...
}

异常

System.TypeInitializationException: The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception.
 ---> System.TypeInitializationException: The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception. 
 ---> System.TypeInitializationException: The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception. 
 ---> System.Security.SecurityException: Requested registry access is not allowed.
 at Microsoft.Win32.RegistryKey.OpenSubKey(String name, Boolean writable)
 at System.Diagnostics.PerformanceCounterLib.FindCustomCategory(String category, PerformanceCounterCategoryType& categoryType)
 at System.Diagnostics.PerformanceCounterLib.IsCustomCategory(String machine, String category)
 at System.Diagnostics.PerformanceCounter.InitializeImpl()
 at System.Diagnostics.PerformanceCounter.set_RawValue(Int64 value)
 at System.Data.ProviderBase.DbConnectionPoolCounters.Counter..ctor(String categoryName, String instanceName, String counterName, PerformanceCounterType counterType)
 at System.Data.ProviderBase.DbConnectionPoolCounters..ctor(String categoryName, String categoryHelp)
 at System.Data.SqlClient.SqlPerformanceCounters..ctor()
 at System.Data.SqlClient.SqlPerformanceCounters..cctor()
 --- End of inner exception stack trace ---
 at System.Data.SqlClient.SqlConnectionFactory..cctor()
 --- End of inner exception stack trace ---
 at System.Data.SqlClient.SqlConnection..cctor()
 --- End of inner exception stack trace ---
 at System.Data.SqlClient.SqlConnection..ctor()
 at System.Data.SqlClient.SqlConnection..ctor(String connectionString, SqlCredential credential)
 at OurProgram.Form1.UpdateStuff() in C:\path_to_project\Form1.cs:line 111

由于

Answer 1

您应该尝试升级到.net 4.6，因为自上次升级到最新的.net框架以来，特定代码路径似乎已添加了try catch。

http://referencesource.microsoft.com/#System/services/monitoring/system/diagnosticts/PerformanceCounterLib.cs,dceb05845090520b

                    if (baseKey != null) {
                        try {
                            key = baseKey.OpenSubKey(keyPath);
                        } catch (SecurityException) {
                            // we may not have permission to read the registry key on the remote machine.  The security exception  
                            // is thrown when RegOpenKeyEx returns ERROR_ACCESS_DENIED or ERROR_BAD_IMPERSONATION_LEVEL
                            //
                            // In this case we return an 'Unknown' category type and 'false' to indicate the category is *not* custom.
                            //
                            categoryType = PerformanceCounterCategoryType.Unknown;
                            this.customCategoryTable[category] = categoryType;
                            return false;
                        }
                    }

此外，如果您的网络管理员为您提供任何不支持升级的信息。然后告诉他，微软将在2016年初放弃对.net 4.0的支持。所以它只是时间问题：D

.NET Framework 4：.NET Framework 4未在任何操作中发布系统。 Windows Server 2003 SP2支持.NET Framework 4，直到 2015年7月14日，Windows Vista SP2，Windows 7 SP1，Windows Server 2008 SP2，Windows Server 2008 R2 SP1，Windows 8.1更新，Windows Server 2012和Windows Server 2012 R2，直到2016年1月12日。

由于事件日志权限，SqlConnection失败

1 个答案: