StrEnum.Dapper 1.0.1

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.NET Standard 2.0
dotnet add package StrEnum.Dapper --version 1.0.1
NuGet\Install-Package StrEnum.Dapper -Version 1.0.1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="StrEnum.Dapper" Version="1.0.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add StrEnum.Dapper --version 1.0.1
#r "nuget: StrEnum.Dapper, 1.0.1"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install StrEnum.Dapper as a Cake Addin
#addin nuget:?package=StrEnum.Dapper&version=1.0.1

// Install StrEnum.Dapper as a Cake Tool
#tool nuget:?package=StrEnum.Dapper&version=1.0.1


Allows to use StrEnum string enums with Dapper.

Supports Dapper v2.0.4+


You can install StrEnum.Dapper using the .NET CLI:

dotnet add package StrEnum.Dapper


Define a string enum and an entity that uses it:

public class Sport: StringEnum<Sport>
    public static readonly Sport RoadCycling = Define("ROAD_CYCLING");
    public static readonly Sport MountainBiking = Define("MTB");
    public static readonly Sport TrailRunning = Define("TRAIL_RUNNING");

public class Race
    public Guid Id { get; set; }
    public string Name { get; set; }
    public Sport Sport { get; set; }


Invoke the StrEnumDapper.UseStringEnums method before the first use of Dapper:


Note, that the UseStringEnums method searches for string enums in all the loaded assemblies, and then registers them with Dapper. Since .NET loads assemblies in a lazy fashion, make sure that the assemblies containing string enums are loaded before calling UseStringEnums. You can do that either implicitly, by referencing types in such assemblies, or by explicitly loading such assemblies. For example, if Sport is located in a separate assembly, you can load it the following way:


Executing commands

connection.Execute(@"INSERT Races(Id, Name, Sport) values (@id, @name, @sport)",
            id = Guid.NewGuid(), 
            name = "Chornohora Sky Marathon", 
            sport = Sport.TrailRunning 
             id = Guid.NewGuid(), 
             name = "Cape Town Cycle Tour", 
             sport = Sport.RoadCycling 
              id = Guid.NewGuid(), 
              name = "Cape Epic", 
              sport = Sport.MountainBiking 

Running queries

You can pass string enums in query parameters and map them to your entities:

var trailRuns = connection.Query(@"SELECT Id, Name, Sport FROM Races WHERE Sport = @sport", new { sport = Sport.TrailRunning });

Note, that you cannot use string enums in the IN clause - Dapper does not support it yet. The following won't work:

var cyclingRaces = connection.Query(@"SELECT Id, Name, Sport FROM Races WHERE Sport in @sports",
    new { sports = new[]{ Sport.TrailRunning, Sport.MountainBiking }});

The workaround would be to case each of the string enum's members to string:

var cyclingRaces = connection.Query(@"SELECT Id, Name, Sport FROM Races WHERE Sport in @sports",
    new { sports = new[]{ (string)Sport.TrailRunning, (string)Sport.MountainBiking }});


Copyright © 2022 Dmitry Khmara.

StrEnum is licensed under the MIT license.

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows net7.0 net7.0-android net7.0-ios net7.0-maccatalyst net7.0-macos net7.0-tvos net7.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48 net481
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.
  • .NETStandard 2.0

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Version Downloads Last updated
1.0.1 102 8/1/2022
1.0.0 99 8/1/2022