C#:需要我的一个类来触发另一个类中的事件以更新文本框 [英] C#: Need one of my classes to trigger an event in another class to update a text box

问题描述

尽管我已经编程了一段时间，但 C# 和事件的总 n00b.

Total n00b to C# and events although I have been programming for a while.

我有一个包含文本框的类.此类创建从串行端口接收帧的通信管理器类的实例.我有这一切工作正常.

I have a class containing a text box. This class creates an instance of a communication manager class that is receiving frames from the Serial Port. I have this all working fine.

每次接收到帧并提取其数据时，我都希望在我的类中使用文本框运行一个方法，以便将此帧数据附加到文本框.

Every time a frame is received and its data extracted, I want a method to run in my class with the text box in order to append this frame data to the text box.

因此，无需发布我的所有代码，我就有了我的表单类...

So, without posting all of my code I have my form class...

public partial class Form1 : Form
{
    CommManager comm;

    public Form1()
    {
        InitializeComponent();
        comm = new CommManager();

    }

    private void updateTextBox()
    {
        //get new values and update textbox
    }
    .
    .
    .

我有我的 CommManager 课程

and I have my CommManager class

class CommManager 
{
     //here we manage the comms, recieve the data and parse the frame
}

所以...本质上，当我解析该框架时，我需要运行表单类中的 updateTextBox 方法.我猜这在事件中是可能的，但我似乎无法让它发挥作用.

SO... essentially, when I parse that frame, I need the updateTextBox method from the form class to run. I'm guessing this is possible with events but I can't seem to get it to work.

在创建 CommManager 的实例后，我尝试在表单类中添加一个事件处理程序，如下所示...

I tried adding an event handler in the form class after creating the instance of CommManager as below...

 comm = new CommManager();
 comm.framePopulated += new EventHandler(updateTextBox);

...但是我一定做错了，因为编译器不喜欢它...

...but I must be doing this wrong as the compiler doesn't like it...

有什么想法吗?！

推荐答案

你的代码应该是这样的:

Your code should look something like:

public class CommManager()
{
    delegate void FramePopulatedHandler(object sender, EventArgs e);

    public event FramePopulatedHandler FramePopulated;

    public void MethodThatPopulatesTheFrame()
    {
        FramePopulated();
    }

    // The rest of your code here.
}

public partial class Form1 : Form      
{      
    CommManager comm;      

    public Form1()      
    {      
        InitializeComponent();      
        comm = new CommManager();      
        comm.FramePopulated += comm_FramePopulatedHander;
    }      

    private void updateTextBox()      
    {      
        //get new values and update textbox      
    }

    private void comm_FramePopulatedHandler(object sender, EventArgs e)
    {
        updateTextBox();
    }
}

这里是评论中提到的 .NET 事件命名指南的链接:

And here's a link to the .NET Event Naming Guidelines mentioned in the comments:

MSDN - 事件命名指南

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