如何从其他方法访问已在Windows窗体加载方法中声明的对象？ [英] How to access objects which have been declared in a Windows Form Load Method from other methods?

问题描述

我正在创建一个Windows窗体应用程序，我在表单Load方法中创建了大量对象。这些对象具有通过其构造函数链接到它们的Audio和PictureBox，并且有一个方法来播放声音文件。



我想要做的是在Windows窗体上通过图像的单击事件启动PlaySound方法。但是我在从类中的其他地方访问对象时遇到问题。我在下面添加了一些代码以使其更清晰：



表单加载方法（声明所有这些对象）：

< pre lang =c＃> public void Form_Load（ object sender，EventArgs e）
{
Indicator Indicator1 = new 指标（IndicatorImage1，（ new
Audio（ Properties.Resources.Sound1.wav） ））;
// ....还有更多这些
}

指标类：

<前lang =c＃> 类指标
{
PictureBox图片;
音频声音;

public 指标（PictureBox ImageIn，Audio NoteIn）
{
image = ImageIn;
Sound = NoteIn;
}
public void ShowSoundImage（）
{
image.Show（）;
}
public void PlaySound（）
{
Sound.Play（）;
}

单击我想要使用对象及其方法的事件（这是在主窗体类中）：

  private   void  IndicatorImage1_Click（对象发​​件人，EventArgs e）
 {
  //  这是我试图实现失败 
 Indicator1.PlaySound（）; 
} 

我目前收到的错误如下：

  当前上下文中不存在名称Indicator1 

有没有办法以不同的方法访问对象方法到Windows窗体中创建的方法？或者是否有更合理的方式来组织这些代码？



非常感谢

解决方案

将其声明为 Form 类的成员，而不是特定方法的本地成员。请参阅 .NET Book Zero [ ^ ]和 C＃语言规范 [ ^ ]。

I am creating a Windows Forms application where I'm creating a large number of objects in the forms Load method. These objects have Audio and PictureBoxs linked to them through their constructors and a method is in place to play the sound file.

What I am trying to do is have the "PlaySound" method started by a click event of an image on the Windows Form. However I am having problems accessing the objects from elsewhere in the class. I have included some code below to make it a little clearer:

Form Load Method (where all these objects are declared):

public void Form_Load(object sender, EventArgs e)
{
    Indicator Indicator1 = new Indicator(IndicatorImage1, (new                                   
    Audio("Properties.Resources.Sound1.wav")));
    //....Theres many more of these
}

Indicator Class:

class Indicator
    {
        PictureBox image;
        Audio Sound;        

        public Indicator(PictureBox ImageIn, Audio NoteIn)
        {
            image = ImageIn;
            Sound = NoteIn;
        }
        public void ShowSoundImage()
        {
            image.Show();
        }
        public void PlaySound()
        {
            Sound.Play();
        }

Click Event where I want to make use of the object and its methods (This is within the main form class):

private void IndicatorImage1_Click(object sender, EventArgs e)
        {       
            //This is the line I am trying to implement unsuccessfully
            Indicator1.PlaySound();           
        }

I am currently getting an error as follows:

"The Name 'Indicator1' does not exist in the current context"

Is there a way to access the objects methods in a different method to where it was created within a windows form? Or is there a more logical way of organising this code?

Many Thanks

解决方案

Declare it as a member of the Form class, rather than local to a particular method. See .NET Book Zero[^] and The C# Language Specification[^].

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