Question

我一直在和想要学习的代表一起玩，我遇到了一个小问题我希望你可以帮助我。

class myClass
{
   OtherClass otherClass = new OtherClass(); // Needs Parameter
   otherClass.SendSomeText(myString);
}

class OtherClass
{
   public delegate void TextToBox(string s);

   TextToBox textToBox;

   public OtherClass(TextToBox ttb)  // ***Problem***
   {
       textToBox = ttb;
   }

   public void SendSomeText(string foo)
   {
       textToBox(foo);
   }
}

形式：

public partial class MainForm : Form
   {
   OtherClass otherClass;

   public MainForm()
   {
       InitializeComponent();
       otherClass = new OtherClass(this.TextToBox);
   }

   public void TextToBox(string aString)
   {
       listBox1.Items.Add(aString);
   }

}

显然这不会编译，因为OtherClass构造函数正在寻找TextToBox作为参数。你会如何推荐绕过这个问题，这样我就可以从myClass中将一个对象放到表格的文本框中？

Answer 1

您可以将其他类更改为

class OtherClass 
{ 
    public delegate void TextToBox(string s); 

    TextToBox textToBox; 

    public OtherClass() 
    { 
    } 
    public OtherClass(TextToBox ttb)  // ***Problem***  
    { 
        textToBox = ttb; 
    } 

    public void SendSomeText(string foo) 
    { 
        if (textToBox != null) 
            textToBox(foo); 
    } 
}

但我不太确定您希望通过

实现目标

class myClass 
{ 
   OtherClass otherClass = new OtherClass(); // Needs Parameter 
   otherClass.SendSomeText(myString); 
}

使用委托填充列表框

1 个答案: