Dapper - Parameter Dynamic

Description

Create and use a parameter in a Dapper method.

Single

Execute a single time a SQL Command.

var sql = "EXEC Invoice_Insert";
using (var connection = My.ConnectionFactory())
{
    connection.Open();
    DynamicParameters parameter = new DynamicParameters();
    parameter.Add("@Kind", InvoiceKind.WebInvoice, DbType.Int32, ParameterDirection.Input);
    parameter.Add("@Code", "Many_Insert_0", DbType.String, ParameterDirection.Input);
    parameter.Add("@RowCount", dbType: DbType.Int32, direction: ParameterDirection.ReturnValue);
    connection.Execute(sql,
        parameter,
        commandType: CommandType.StoredProcedure);
    int rowCount = parameter.Get<int>("@RowCount");
}

Many

Execute many times a SQL Command

var sql = "EXEC Invoice_Insert";
var parameters = new List<DynamicParameters>();
for (var i = 0; i < 3; i++)
{
    var p = new DynamicParameters();
    p.Add("@Kind", InvoiceKind.WebInvoice, DbType.Int32, ParameterDirection.Input);
    p.Add("@Code", "Many_Insert_" + (i + 1), DbType.String, ParameterDirection.Input);
    p.Add("@RowCount", dbType: DbType.Int32, direction: ParameterDirection.ReturnValue);
    parameters.Add(p);
}
using (var connection = My.ConnectionFactory())
{
    connection.Open();
    connection.Execute(sql,
        parameters,
        commandType: CommandType.StoredProcedure
    );
    var rowCount = parameters.Sum(x => x.Get<int>("@RowCount"));
}