.net:如何在c#中使用可为空的参数执行存储过程?

如何在c#中使用可为空的参数执行存储过程?

编辑 :

实际上,我已经写了下面的代码。如您所见,status参数是一种可为空的值类型。 对吗?还是不?

public void LoadAll(DataTable tb, int? status=null)
    {
        try
        {
            using (SqlConnection connection = new SqlConnection())
            {
                connection.ConnectionString = this.connectionString;

                using (SqlCommand command = connection.CreateCommand())
                {
                    command.CommandType = CommandType.StoredProcedure;
                    command.CommandText = "USP_OrganizationChartSelect";
                    SqlCommandBuilder.DeriveParameters(command);
                    command.Parameters["@Status"].Value = status.HasValue ? status : null;
                    if (connection.State != ConnectionState.Open)
                        connection.Open();
                    SqlDataAdapter adapter = new SqlDataAdapter(command);
                    tb.Clear();
                    adapter.Fill(tb);
                    adapter.Dispose();
                    adapter = null;
                }
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }

谢谢