c#事件的问题

[zzyhost]

如下，触发事件一般this.OnDtHealthOrderQuery(this, new DtHealthOrderQueryEventArgs();这样写就行了，下面代码还有个大括号是什么意思？

public event EventHandler<DtHealthOrderQueryEventArgs> OnDtHealthOrderQuery;

            this.OnDtHealthOrderQuery(this, new DtHealthOrderQueryEventArgs()
            {
                StartDT = startTimePicker.Value,
                EndDT = startTimePicker.Value
            }
            );

[xuzuning]

new DtHealthOrderQueryEventArgs()
            {
                StartDT = startTimePicker.Value,
                EndDT = startTimePicker.Value
            }

给属性赋初值 new DtHealthOrderQueryEventArgs() 使用默认初值

[shawn_yang]

给属性赋初值

[Denuin]

跟以下代码一个意思：

public event EventHandler<DtHealthOrderQueryEventArgs> OnDtHealthOrderQuery;
 
var doqe = new DtHealthOrderQueryEventArgs();
doqe.StartDT = startTimePicker.Value;
doqe.EndDT = startTimePicker.Value;

this.OnDtHealthOrderQuery(this, doqe);

[wanghui0380]

定义和调用 至于你问大括号，那是你看叉了，他跟你问题无关他其实是 new DtHealthOrderQueryEventArgs() { StartDT = startTimePicker.Value, EndDT = startTimePicker.Value } 也就是初始化那个EventArgs参数