/// <summary>
/// 修改
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <param name="connection"></param>
/// <param name="param"></param>
/// <param name="keySelector"></param>
/// <param name="transaction"></param>
/// <param name="commandTimeout"></param>
/// <returns></returns>
public static int Update <TEntity>(this IDbConnection connection, IEnumerable <TEntity> param, Expression <Func <TEntity, object> > keySelector = null,
Expression <Func <TEntity, bool> > predicate = null,
IDbTransaction transaction = null, int?commandTimeout = null)
where TEntity : BaseEntity
{
ISqlAdapter adapter = GetSqlAdapter(connection);
var sql = adapter.GetUpdate(predicate, keySelector);
var result = connection.ExecuteExt <TEntity>(sql, param, transaction, commandTimeout);
return(result);
}