如何使用实体框架从SQL Server实例获取数据库名称列表? [英] How to get a list of database names from a SQL Server instance using Entity Framework?

问题描述

我想使用实体框架(EF)查询SQL Server实例并返回该实例上的数据库名称列表.

I would like to use Entity Framework (EF) to query a SQL Server instance and return a list of database names on that instance.

我可以使用以下代码来执行此操作，但想知道EF是否有办法?

I can do this using the following code, but wondered if there was a way with EF?

   public static string[] GetDatabaseNames(SqlConnection masterConn)
    {
        List<string> databases = new List<string>();

        //  retrieve the name of all the databases from the sysdatabases table
        using (SqlCommand cmd = new SqlCommand("SELECT [name] FROM sysdatabases", masterConn))
        {
            using (SqlDataReader rdr = cmd.ExecuteReader())
            {
                while (rdr.Read())
                {
                    databases.Add((string)rdr["name"]);
                }
            }
        }

        return databases.ToArray();
    }

我应该提到我是EF及其功能/限制的新手.

I should mention that I am new to EF and its capabilities / limitations.

推荐答案

您可以简单地通过Entity Framework将原始查询发送到SQL Server:

You could simply send a raw query to your SQL Server through Entity Framework :

using (var context = new MyContext()) 
{ 
    var dbNames = context.Database.SqlQuery<string>(
        "SELECT name FROM master.dbo.sysdatabases").ToList(); 
}

来源: https://msdn.microsoft.com/en-us/library/jj592907(v = vs.113).aspx 和 https://stackoverflow.com/a/147662/2699126

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