选择列表中的项目时如何将属性值设置为空

Question

I have a class Like this,

class Test
{
    public int ID { get; set; }
    public string Name { get; set; }
}

I want to select eligible items in List, I also want to set Name to null of the result list. I don't want to loop the collection again to set property value, is there a way to set the property value during the selection in linq?

This is my current query:

var v = from t in tests where ids.Contains(t.ID) select t;

Thanks

Answer 1

You can set it to null explicitly:

var newTests = tests.Where(test => ids.Contains(test.ID))
                    .Select(test => { 
                                       test.Name = null; 
                                       return test;
                                    });

Or you can project new instances of Test :

var newTests = tests.Where(test => ids.Contains(test.ID))
                    .Select(test => new Test { ID = test.ID });