如何检查“方法组”通过“发送者”目的？

发布于 2024-11-02 13:38:42 字数 551 浏览 3 评论 0原文

想象一下这样的方法（在Win Forms中）：

//First method
private void buttonStart_Click(object sender, EventArgs e)
{
       //I call another method here
       this.GetData(sender, null)
}

//Second method
private void GetData(object sender, EventArgs e)
{
       //how to check IF calling method is buttonStart_Click ???
       if(sender.Equals == buttonStart_Click) 
       {
            //DO BLAH BLAH
       }
}

我希望我很清楚，那就是我想知道哪个方法正在调用“GetData”。注意我知道我可以拥有一个全局变量并将其设置为某个值，但我想知道是否有直接的方法可以做到这一点？

谢谢。

原文

Imagine a method like this ( in Win Forms):

//First method
private void buttonStart_Click(object sender, EventArgs e)
{
       //I call another method here
       this.GetData(sender, null)
}

//Second method
private void GetData(object sender, EventArgs e)
{
       //how to check IF calling method is buttonStart_Click ???
       if(sender.Equals == buttonStart_Click) 
       {
            //DO BLAH BLAH
       }
}

I hope I was clear, that is I want to know which method is calling 'GetData'. note I know I can have a global variable and set it to something, but I want to know if there is a DIRECT way to do this?

Thanks.

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两相知 2024-11-09 13:38:42

sender 不会是 buttonStart_Click，它只是按钮。所以你可以测试一下。

if (sender != null && sender.Equals(buttonStart))
{
   // work with this information
}

但是，如果您发现自己沿着这条路线走下去，您最终可能会看到多个 if 块，每个块具有不同的行为，具体取决于 发送者 的身份。如果是这种情况，您最好采用不同的方法。为每个事件使用不同的处理程序，通过委托封装不同的逻辑等。不要以充满 if / else if / else if / ... 的页面结束。

sender is not going to be buttonStart_Click, it will simply be the button. So you can test for it.

if (sender != null && sender.Equals(buttonStart))
{
   // work with this information
}

However, if you find yourself going down this route, you may end up seeing multiple if blocks each with different behaviors depending on the identity of sender. If that is the case, you'd be better served with a different approach. Have a different handler for each event, encapsulate the differing logic via a delegate, etc. Do not end up with a page full of if / else if / else if / ....

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我为君王 2024-11-09 13:38:42

如果由于从其他方法调用该方法而必须执行不同的操作，那么最好只调用不同的方法：

//First method
private void buttonStart_Click(object sender, EventArgs e)
{
       //I call another method here
       this.SpecialGetData(sender, null)
}

//Second method
private void GetData(object sender, EventArgs e)
{
     // Do regular stuff
}

//Special second method
private void SpecialGetData(object sender, EventArgs e)
{
    //DO BLAH BLAH
}

If you have to do something different because you called the method from some other method, it's probably best to just call a different method:

//First method
private void buttonStart_Click(object sender, EventArgs e)
{
       //I call another method here
       this.SpecialGetData(sender, null)
}

//Second method
private void GetData(object sender, EventArgs e)
{
     // Do regular stuff
}

//Special second method
private void SpecialGetData(object sender, EventArgs e)
{
    //DO BLAH BLAH
}

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