有两个类:
public abstract class BaseObject
{
public string Status {get; set;}
public List<string> StatusHistory {get; set;}
protected abstract void ExecuteInternal();
public void Execute()
{
this.Status = "Started";
this.ExecuteInternal();
this.Status = "Finished";
}
// on status changed event: adding current status to StatusHistory list
}
public class SomeObject : BaseObject
{
public System.Action Action {get; set;}
public SomeObject() : this(null)
{
}
public SomeObject(System.Action action)
{
this.Action = action;
}
protected override void ExecuteInternal()
{
this.Action();
}
}
使用此对象,我想要及时设置Status属性Action将被执行:
const string customStatus = "Custom status";
var someObject= new SomeObject(() => Status = customStatus);
someObject.Execute();
验证customStatus确实已设置:
if (!HistoryStatus.Contains(customStatus))
{
// throw an exception
}
这里发生错误:当前上下文中不存在名称“Status”。
我如何在Action中设置属性?
说实话,这是过于复杂的事情,我强烈建议使用对象初始化语法:
var someObject = new SomeObject() { Status = customStatus};
不过,您可以使用System.Action<SomeObject>
解决当前问题,System.Action
指定预期的输入类型而不是class SomeObject
{
public System.Action<SomeObject> Action {get; set;}
public string Status {get; set;}
public SomeObject() : this(null)
{
}
public SomeObject(System.Action<SomeObject> action)
{
this.Action = action;
}
public void Execute()
{
this.Action(this);
}
}
然后修改代码中的相应位置:
const string customStatus = "Custom status";
var someObject= new SomeObject((s) => s.Status = customStatus);
然后调用如下:
const string customStatus = "Custom status";
var someObject = new SomeObject();
someObject.Action = () => someObject.Status = customStatus;
我需要这样的东西:
qazxswpoi