DbProviderFactories.GetFactory Method (DbConnection)缺失

Question

根据MSDN，.NET 4中有一个GetFactory(DbConnection)的重载。然而，我无法调用它-在编译时失败并报错：

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框架有问题还是文档中有错别字？

- archimed7592

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+1 确认，我使用 .NET 4 也是这样。 - Tim Schmelter

Answer 1

您可以使用以下解决方案调用“GetFactory”方法： https://msdn.microsoft.com/zh-cn/library/dd0w4a2z(v=vs.110).aspx

DbProviderFactory factory =
            DbProviderFactories.GetFactory(providerName);

- Carl Prothman