C＃：需要我的一个类来触发另一个类中的一个事件来更新一个文本框 [英] C#: Need one of my classes to trigger an event in another class to update a text box

问题描述

总共n00b到C＃和事件，虽然我已经编程一段时间了。

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。该类创建一个从串行端口接收帧的通信管理器类的实例。我有这一切都很好。

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.

每次收到一个帧并提取其数据时，我想要一个方法在我的类中运行文本框，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.

所以，没有发布我的所有代码，我有我的表单类...

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类

and I have my CommManager class

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

SO ...本质上，当我解析这个框架时，我需要从表单类运行updateTextBox方法。我猜这是可能的事件，但我似乎无法让它工作。

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.

我在创建实例后尝试在表单类中添加事件处理程序的CommManager如下...

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);

...但是我必须做错，因为编译器不喜欢它...

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

任何想法？

推荐答案

你的代码应该是：

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();
    }
}

这里是一个指向.NET事件命名指南的链接在评论中提到：

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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