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我試圖實現這種表達式:「A => ABWhere(extExp).Count()> 0」,並且我遇到了如何爲Where (...),這是我假設的擴展方法ICollection <>。有人可以幫忙嗎?用「where」方法調用的表達式
Expression<Func<N, bool>> conditions = c => c.T_ID == 1 || c.T_ID == 2;
ParameterExpression mpe = Expression.Parameter(typeof(T), "A");
Expression prop = Expression.Property(mpe,typeof(T).GetProperty("B"));
...
var propWhere = Expression.Call(..., prop, conditions);
如何調用它正確