Dapper 确保查询成功最佳实践

Question

I want to use Dapper into my WebApi Project. I Have a method for creating database from query:

    public async Task<bool> CreateDatabase()
    {
        var connection = _connection.GetOpenConnection();

        bool created = await connection.ExecuteAsync(SqlQuery.CreateDatabase); 
    }

My question is, how to write query for creating database and how to ensure, that query completed succesfuly and which method from dapper to use?

My SqlQuery.CreateDatabase looks like this:

IF NOT EXISTS(SELECT * FROM sys.databases WHERE name = 'DataBase')
  BEGIN
    CREATE DATABASE DataBase
  END

Do i need to return something from query?

Answer 1

If a problem occurs, it should already present as an exception - probably a SqlException - telling you about it, so: what you have should already be fine. Note, though, that if your connection string tries to connect to the database that doesn't yet exist , then Open[Async] is likely to fail. Ultimately, you could just try connecting to the specified database afterwards to be sure, but again, what you have should already be fine .

Note that it is often the case that app accounts do not have permissions to create databases. In that scenario, you'll need to get a DBA to create the database for you, and tell you the connection details.