private void Join(GenericWhereEntity <TA> TA, GenericWhereEntity <TB> TB,
Expression <Func <TA, TB, bool> > conditionExpression, JoinModeEnum joinMode)
{
if (conditionExpression.Body == null)
{
throw new EntitySqlException("未指定连接条件！");
}
if (!(conditionExpression.Body is BinaryExpression) || !CheckJoinCondition(conditionExpression.Body))
{
throw new EntitySqlException("指定的连接条件无效！");
}
JoinMode = joinMode;
MainEntity = TA;
EntityToJoin = TB;
_leftTableGuid = TA.Guid;
_rightTableGuid = TB.Guid;
_joinConditionExpression = conditionExpression.Body;
_joinConditionFirstParameter = conditionExpression.Parameters[0].Name;
}
public void LeftJoin(GenericWhereEntity <TA> TA, GenericWhereEntity <TB> TB,
Expression <Func <TA, TB, bool> > conditionExpression)
{
Join(TA, TB, conditionExpression, JoinModeEnum.LeftJoin);
}