来自stackoverflow的orm

dapper-dot-net Simple SQL object mapper for ADO.NET

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Project Information  Starred by  313 user s Activity    High Project feeds Code license Apache License 2.0 Labels CSharp, SQLServer   Members [email protected], marc.gravell 2 committers Links Blogs Sam's Blog Marc's Blog Stack Overflow Blog External links nuget

Dapper - a simple object mapper for .Net Official Github clone: https://github.com/SamSaffron/dapper-dot-net Features Dapper is a single file you can drop in to your project that will extend your IDbConnection interface. It provides 3 helpers: Execute a query and map the results to a strongly typed List  Note: all extension methods assume the connection is already open, they will fail if the connection is closed. public static IEnumerable<T> Query<T>(this IDbConnection cnn, string sql, object param = null, SqlTransaction transaction = null, bool buffered = true) Example usage: public class Dog {     public int? Age { get; set; }     public Guid Id { get; set; }     public string Name { get; set; }     public float? Weight { get; set; }     public int IgnoredProperty { get { return 1; } } }                         var guid = Guid.NewGuid(); var dog = connection.Query<Dog>("select Age = @Age, Id = @Id", new { Age = (int?)null, Id = guid });             dog.Count()     .IsEqualTo(1); dog.First().Age     .IsNull(); dog.First().Id     .IsEqualTo(guid); Execute a query and map it to a list of dynamic objects public static IEnumerable<dynamic> Query (this IDbConnection cnn, string sql, object param = null, SqlTransaction transaction = null, bool buffered = true) This method will execute SQL and return a dynamic list. Example usage:  var rows = connection.Query("select 1 A, 2 B union all select 3, 4"); ((int)rows[0].A)    .IsEqualTo(1); ((int)rows[0].B)    .IsEqualTo(2); ((int)rows[1].A)    .IsEqualTo(3); ((int)rows[1].B)     .IsEqualTo(4);