c# 4.0 -使用linq更新复杂对象列表中的元素

Question

大家好，提前感谢大家的解决方案

有这些对象

    List<AccessModuleInfo> listOfAccessModuleInfo = new List<AccessModuleInfo>();
    public class AccessModuleInfo
    {
       public int AccessModuleId { get; set; }
       public string AccessModuleName { get; set; }
       public List<AccessRoleInfo> ListOfAccessRole { get; set; }
     }
    public class AccessRoleInfo
    {
      public int AccessRoleId { get; set; }
      public string AccessRoleName { get; set; }
      public bool AccessRoleValue { get; set; }
    }

我收到listfaccessmoduleinfo已经填满，当我尝试更新特定AccessModuleInfo中的AccessRoleValue时，所有具有相同AccessRoleId的AccessRoleValue都被更新。

我只想更新特定AccessModuleInfo的AccessRoleValue(例如，AccessModuleId = 4)

谢谢

Answer 1

正常情况下，这样的操作应该可以正常工作:

// You didn't confuse == vs = did you?
// Single also helps us debug and ensure we're only getting one result
var itemToUpdate = listOfAccessModuleInfo.Where(x => x.AccessModuleId == 4).Single();
itemToUpdate.ListOfAccessRole.ForEach(x => x.AccessRoleValue = newValue);