Question

我有这样的声明：

foreach (var container in modelEntities.
   Where(me => me.Value.ModelEntityType == (int)EntityType.Container))

现在我想在这个where语句中添加一个or子句，但是我似乎无法做到这一点。

有办法吗？或者我必须做

var containers = (from me in modelEntities
   where me.Value.ModelEntityType == (int)EntityType.Container ||
   me.Value.ModelEntityType == (int)EntityType.SubForm
   select me);

foreach (var container in containers)

Answer 1

您只需将或添加到第一个表单：

foreach (var container in modelEntities.
    Where(me => me.Value.ModelEntityType == (int)EntityType.Container ||
      me.Value.ModelEntityType == (int)EntityType.SubForm))

Answer 2

将所有选项添加到列表并查询该列表。

var options = new [] {(int)EntityType.Container, (int)EntityType.SubForm};

var containers = modelEntities.Where(m => options.Contains(m.Value.ModelEntityType));

linq扩展方法：有没有办法在where方法中添加OR子句

2 个答案: