Dapper.NETBulk inserts

Remarks

The WriteToServer and WriteToServerAsync have overloads that accept IDataReader (seen in the examples), DataTable, and DataRow arrays (DataRow[]) as the source of the data for the Bulk Copy.

Async Bulk Copy

This sample uses a ToDataReader method described here Creating a Generic List DataReader for SqlBulkCopy.

This can also be done using non-async methods.

public class Widget
{
    public int WidgetId {get;set;}
    public string Name {get;set;}
    public int Quantity {get;set;}
}

public async Task AddWidgets(IEnumerable<Widget> widgets)
{
    using(var conn = new SqlConnection("{connection string}")) {
        await conn.OpenAsync();

        using(var bulkCopy = new SqlBulkCopy(conn)) {
            bulkCopy.BulkCopyTimeout = SqlTimeoutSeconds;
            bulkCopy.BatchSize = 500;
            bulkCopy.DestinationTableName = "Widgets";
            bulkCopy.EnableStreaming = true;

            using(var dataReader = widgets.ToDataReader())
            {
                await bulkCopy.WriteToServerAsync(dataReader);
            }
        }
    }
}

Bulk Copy

This sample uses a ToDataReader method described here Creating a Generic List DataReader for SqlBulkCopy.

This can also be done using async methods.

public class Widget
{
    public int WidgetId {get;set;}
    public string Name {get;set;}
    public int Quantity {get;set;}
}

public void AddWidgets(IEnumerable<Widget> widgets)
{
    using(var conn = new SqlConnection("{connection string}")) {
        conn.Open();

        using(var bulkCopy = new SqlBulkCopy(conn)) {
            bulkCopy.BulkCopyTimeout = SqlTimeoutSeconds;
            bulkCopy.BatchSize = 500;
            bulkCopy.DestinationTableName = "Widgets";
            bulkCopy.EnableStreaming = true;

            using(var dataReader = widgets.ToDataReader())
            {
                bulkCopy.WriteToServer(dataReader);
            }
        }
    }
}