asp.net：将对象的事件从UserControl发送到其父级 [英] asp.net: send an object's event from a UserControl to its Parent

问题描述

我有一个用户类，其中有 Login（）和 Logout（）和 GetData（） 。有一个 UserChanged 事件，它会在调用这些函数之一时触发。

I have a User class with functions to Login() and Logout() and GetData(). There's a UserChanged event, it fires when either of these functions are called.

我的默认值为UserControl我们有一个名为Login.ascx的UserControl，它们被动态添加。

I have UserControls on my Default.aspx (they're added dynamically).

它提供了使用User类的功能：您可以在此处登录/注销。我有一个**** EventHandler * for ** UserChanged *****（如果我没有一个，它会失败，一个对象没有找到异常）。

I have a UserControl named Login.ascx. It provides the functionality to use the User class: you can Login / Logout here. I have an ****EventHandler* for **UserChanged***** (if I don't have one, it will fail with a object not found exception).

我需要提醒其他UserControls关于用户状态的更改。
我以某种方式需要将UserChanged事件从Login.ascx传递给其父Default.aspx。

I need to alert the other UserControls about the changes to the user's state. I somehow need to pass the UserChanged event from Login.ascx to its Parent, Default.aspx.

我该怎么做？

推荐答案

Login.ascx.cs

public delegate void OnUserChangedHandler(object sender);
public OnUserChangedHandler OnUserChanged;

private void RaiseUserChangedEvent() //Call this method when the user changes
{
    //UserChanged Event
    if (OnUserChanged != null)
    {
        OnUserChanged(this);
    }
}

Default.aspx.cs

protected override void OnInit(EventArgs e)
{
    InitializeComponent();
    base.OnInit(e);
}

private void InitializeComponent()
{
    loginControl.OnUserChanged += OnUserChanged;
}

private void OnUserChanged(object sender)
{
    //Code here to do something with other controls on this page
}

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