public override string Translate(LambdaExpression expr)
{
//判断该Where查询是否为第一次访问,如果是第一次访问,则设置访问
if (TranslatorDelegate.IsFirstVisit(SectionType.Where))
{
SqlBuilder.Append($" WHERE");
TranslatorDelegate.SetVisited(SectionType.Where);
}
Visit(expr.Body);
return(SqlBuilder.ToString());
}
protected override Expression VisitMember(MemberExpression node)
{
var asc = _parameter.IsAsc ? "ASC" : "DESC";
SqlBuilder.Append(TranslatorDelegate.IsFirstVisit(SectionType.OrderBy) ? $"," : $" ORDER BY");
if (TranslatorDelegate.IsMultipleType())
{
SqlBuilder.Append($" [{TranslatorDelegate.GetTypeAlias(node.Member.DeclaringType)}].");
}
SqlBuilder.Append($"[{TranslatorDelegate.GetMemberMap(node.Member)}] {asc}");
return(base.VisitMember(node));
}