如何在代码中添加实体框架6提供程序？

Question

我在C#应用程序中使用Entity Framework 6,它完美地运行.创建Model时,将生成app.config并具有所有必需的配置.现在我不喜欢app.config中的东西,所以我使用连接字符串构建器.我成功地删除了app.config文件中的所有内容,除了以下内容:

<entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
</entityFramework>

如果我删除它,它不起作用.那么如何将该配置转换为c#代码？我该怎么办？我查看了基于代码的配置(http://msdn.microsoft.com/en-us/data/jj680699)但是,它没有帮助.

我创建连接字符串的部分类看起来像这样:

public partial class LogEntities
    {
        public LogEntities(string serverName)
            : base(GetConnectionString(serverName))
        {
        }

        public static string GetConnectionString(string serverName)
        {
            // Specify the provider name, server and database.
            const string databaseName = "_LOG";

            // Initialize the connection string builder for the underlying provider.
            SqlConnectionStringBuilder sqlBuilder = new SqlConnectionStringBuilder
            {
                DataSource = serverName,
                InitialCatalog = databaseName,
                IntegratedSecurity = true,
                MultipleActiveResultSets = true
            };

            // Initialize the EntityConnectionStringBuilder.
            System.Data.EntityClient.EntityConnectionStringBuilder entityBuilder = new System.Data.EntityClient.EntityConnectionStringBuilder();
            entityBuilder.Provider = "System.Data.SqlClient";

            // Set the provider-specific connection string.
            entityBuilder.ProviderConnectionString = sqlBuilder.ToString();

            // Set the Metadata location.
            entityBuilder.Metadata = @"res://*/myproject.LogModel.csdl|res://*/myproject.LogModel.ssdl|res://*/myproject.LogModel.msl";

            return entityBuilder.ConnectionString;
        }
    }

在此先感谢您的帮助.

Answer 1

在EF6中,您可以使用代码库配置.看看这个文章的更多细节.它显示了如何设置默认连接工厂(使用SetDefaultConnectionFactory方法).要设置提供程序,请使用该SetProviderServices方法.