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Dapper.Bulk- bulk inserts for Dapper

Features

Dapper.Bulk contains helper methods for bulk inserting.

Download

Dapper.Bulk Nuget

PM> Install-Package Dapper.Bulk

Usage

  • Inserts entities, without result for best performance:
connection.BulkInsert(data);
await connection.BulkInsertAsync(data);
  • Inserts and returns inserted entities:
var inserted = connection.BulkInsertAndSelect(data);
var inserted = await connection.BulkInsertAndSelectAsync(data);

Default Conventions

  • TableName is TypeName + s. When Interface I is removed.
  • Key is Id property (case-insensitive)

Custom Conventions

TableName - somewhere before usage call.

TableMapper.SetupConvention("tbl", "s")

Attributes

We do not rely on specific attributes. This means you can use whatever attributes with following names:

  • TableAttribute - Must have string Name property. Exists in System.ComponentModel.Annotations Nuget.
  • ColumnAttribute - Must have string Name property. Exists in System.ComponentModel.Annotations Nuget.
  • KeyAttribute - Marking only attribute. Exists in System.ComponentModel.Annotations Nuget.
  • ComputedAttribute - Marking only attribute. For fields returned from Db.
  • NotMapped - Marking only attribute. For ignored fields.
// Table Cars by default convention 
public class Car
{
    // Identity by convention
    public int Id { get; set; }
    
    public string Name { get; set; }
	
    public DateTime ManufactureDate { get; set; }
}

// Supported in v1.2+
public enum CarType : int
{
    Classic = 1,
    Coupe = 2
}

[Table("tblCars")]
public class Car
{
    [Key] // Identity
    public int CarId { get; set; }
    
    public string Name { get; set; }
	
    public CarType CarType { get; set; } //SQL Data Type should match Enum type
	
    [Computed] // Will be ignored for inserts, but the value in database after insert will be returned
    public DateTime ManufactureDate { get; set; }
}
public class IdentityAndNotMappedTest
{
    [Key]
    public int IdKey { get; set; }

    public string Name { get; set; }

	// Will be ignored for inserts
    public virtual TestSublass TestSublass { get; set; }

    [NotMapped] // Will be ignored for inserts
    public int Ignored { get; set; }
}
// Supported in v1.4+
private class CustomColumnName
{
    [Key]
    public int IdKey { get; set; }

    [Column("Name_1")] // Will map to SQL column Name_1
    public string Name { get; set; } 

    [Column("Int_Col")] // Will map to SQL column Int_Col
    public int IntCol { get; set; }

    [Column("Long_Col")] // Will map to SQL column Long_Col
    public long LongCol { get; set; }

    [NotMapped] // Will be ignored for inserts
    public int Ignored { get; set; }

    [Write(false)] // Will be ignored for inserts
    public int Ignored { get; set; }
}


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