缺少DbProviderFactories.GetFactory方法(DbConnection)

Question

根据MSDN的说法，GetFactory(DbConnection)在.NET 4中有一个重载。但是，我不能调用它-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有什么问题吗?或者是文档中的拼写错误？

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);