You can also use Dapper’s SqlBuilder. Note that you’ll have to install the Dapper.SqlBuilder NuGet package since it doesn’t come with Dapper’s main distribution. Here is an example: [Test] public void Test() { var model = new PersonModel {FirstName = “Bar”, City = “New York”}; var builder = new SqlBuilder(); //note the ‘where’ in-line comment … Read more
This Git project is very helpful. I started from the same and did some changes as per my need. public sealed class DalSession : IDisposable { public DalSession() { _connection = new OleDbConnection(DalCommon.ConnectionString); _connection.Open(); _unitOfWork = new UnitOfWork(_connection); } IDbConnection _connection = null; UnitOfWork _unitOfWork = null; public UnitOfWork UnitOfWork { get { return _unitOfWork; … Read more
Manually opening a connection is not “bad practice”; dapper works with open or closed connections as a convenience, nothing more. A common gotcha is people having connections that are left open, unused, for too long without ever releasing them to the pool – however, this isn’t a problem in most cases, and you can certainly … Read more
Dapper.DefaultTypeMap.MatchNamesWithUnderscores = true; job done ;p
When in doubt regarding anything db or reflection, I ask myself, “what would Marc Gravell do?”. In this case, he would use FastMember! And you should too. It’s the underpinning to the data conversions in Dapper, and can easily be used to map your own DataReader to an object (should you not want to use … Read more
No, there are no plans to do this. It is far far outside what dapper tries to do. So far that I would say it is antithetical. Dapper core tries to be the friend to those who love their SQL.
Dapper is just a tool. What it does is: make it trivially easy to correctly parameterize queries make it trivially easy to execute queries (scalar, multi-rows, multi-grids, and no-results) make it trivially easy to turn results into objects very efficiently and quickly What it doesn’t do is: generate a class model for you generate queries … Read more
In SQL Server any top expression other than a numeric constant needs to be in parentheses. SELECT TOP (@MaxLimit) FROM …
Dapper when targeting .NET 4.5 has full support for TPL usage, via the methods ending in *Async – QueryAsync etc. Specifically, the .NET 4.5 build includes this extra set of methods
int id = … var exists = conn.ExecuteScalar<bool>(“select count(1) from Table where Id=@id”, new {id}); should work…