ado.net - 缺少 DbProviderFactories.GetFactory 方法 (DbConnection)

Question

根据MSDN，.NET 4 中有 GetFactory(DbConnection) 的重载。但是，我无法调用它 - 在编译时失败说：

error BC30518: Overload resolution failed because no accessible 'GetFactory' can be called with these arguments:
    'Public Shared Function GetFactory(providerRow As System.Data.DataRow) As System.Data.Common.DbProviderFactory': Value of type 'System.Data.Common.DbConnection' cannot be converted to 'System.Data.DataRow'.
    'Public Shared Function GetFactory(providerInvariantName As String) As System.Data.Common.DbProviderFactory': Value of type 'System.Data.Common.DbConnection' cannot be converted to 'String'.

我的 .NET FW 有问题还是文档中的错字？

Answer 1

您可以使用以下解决方案调用“GetFactory”方法： https ://msdn.microsoft.com/en-us/library/dd0w4a2z%28v=vs.110%29.aspx

DbProviderFactory factory =
            DbProviderFactories.GetFactory(providerName);