如何在算法中使用嵌入的术语创建非休眠条件

Question

例如:

var Ex1 = Expression.Eq("DocAttrId", new decimal(-2));
var Ex2 = Expression.Eq("RowPos", new decimal(1));
var Ex3 = Expression.Eq("DocAttrId", new decimal(105510));
var Ex4 = Expression.Eq("DocAttrId", new decimal(-1));
var ExGroup1 = (Ex1 || Ex2);
var ExGroup2 = (Ex3 && ExGroup1);
var ExGroup3 = (Ex4 || ExGroup2);
_criteria.Add(ExGroup3);

我可以创建一个算法通过建立一个标准，如果我有所有的Ex1…Ex4表达式在列表或数组??

Answer 1

var expressions = new[] {
    Expression.Eq("DocAttrId", new decimal(-2)),
    Expression.Eq("RowPos", new decimal(1)),
    Expression.Eq("DocAttrId", new decimal(105510)),
    Expression.Eq("DocAttrId", new decimal(-1)),
}
var ExGroup1 = Expression.Or(expressions[0], expressions[1]);
var ExGroup2 = Expression.And(expressions[2], ExGroup1);
var ExGroup3 = Expression.Or(expressions[3], ExGroup2);
_criteria.Add(ExGroup3);