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如何使用in获取PostgreSQL用户计算机上所有可用数据库的列表?NpgsqlC#

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2 回答 2

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在 postgreSQL 中有两种方法可以做到这一点:

  • \l
  • SELECT datname FROM pg_database;
于 2012-01-22T07:38:26.283 回答
0

使用Npgsql您可以使用这样的代码片段:

IEnumerable<string> GetDatabaseNames()
{
    var connStrBuilder = new NpgsqlConnectionStringBuilder();
    connStrBuilder.Host = "localhost";
    connStrBuilder.Username = "theduck";
    connStrBuilder.Password = "password123";
    connStrBuilder.Database = "postgres"; // this database is always present

    using (var conn = new NpgsqlConnection(connStrBuilder.ConnectionString))
    {
        conn.Open();
        using (var command = new NpgsqlCommand("SELECT datname FROM pg_database WHERE datistemplate = false ORDER BY datname;", conn))
        using (var reader = command.ExecuteReader())
        {
            while (reader.Read())
            {
                yield return reader.GetString(0);
            }
        }
    }
}
于 2020-11-10T23:39:40.710 回答