Question

我的计划是创建一个单一的活动：

“好的，鼠标进入已注册的pictureBox，根据发件人名称将X图片加载到其上。”

处理此问题的最佳方法是什么？

我应该创建一个名称为key的字典，以及图片资源的位置作为值吗？

这是我到目前为止所拥有的：

private void SetPictureBoxEvents()
        {
            Andromeda.MouseEnter += new EventHandler(HeroMouseEnter);
            Engineer.MouseEnter += new EventHandler(HeroMouseEnter);
            Nighthound.MouseEnter += new EventHandler(HeroMouseEnter);
            Swiftblade.MouseEnter += new EventHandler(HeroMouseEnter);
        }

void HeroMouseEnter(object sender, EventArgs e)
    {
        //My picture box is named Andromeda. I'm going use that name 
        // as a key is a Dictionary and pull the picture according to the name.
        //This is to make a generic event to handle all movements.
        //Any help?
        // ((PictureBox)sender).Image =             
    }

我怎么能在我的资源中为图像位置创建一个字典。：

Dictionary<string, TestProject.Properties.Resources> HeroList 
       = new Dictionary<string, TestProject.Properties.Resources>();

这不起作用。

Answer 1

你已经做到了。几乎 - 见下文

void HeroMouseEnter(object sender, EventArgs e)
{
    //My picture box is named Andromeda. I'm going use that name 
    // as a key is a Dictionary and pull the picture according to the name.
    //This is to make a generic event to handle all movements.
    //Any help?
    ((PictureBox)sender).Image =  GetImage(((PictureBox)sender).Name)           
}

Answer 2

通常我会看到一个用于此的开关语句。

在HeroMouseEnter方法中

PictureBox sendingBox = (PictureBox)sender;
Switch(sendingBox.Name)
{
    case "MyPicture":
        //Set picture here
        break;
    case "MyPicture2":
        //Next picture....
        break;
}

此外，如果您的图片已经在资源中，那么尝试为图像创建字典可能会更加浪费，因为这只是重复。

Answer 3

创建自己的事件处理程序类，其中包含与图像名称对应的实例变量。然后你的代码看起来像......

private void SetPictureBoxEvents()
    {
        Andromeda.MouseEnter += new EventHandler(new HeroMouseHandler("Andromeda.jpg").HeroMouseEnter);
        Engineer.MouseEnter += new EventHandler(new HeroMouseHandler("Engineer.jpg").HeroMouseEnter);
        Nighthound.MouseEnter += new EventHandler(new HeroMouseHandler("Nighthound.jpg").HeroMouseEnter);
        Swiftblade.MouseEnter += new EventHandler(new HeroMouseHandler("Swiftblade.jpg").HeroMouseEnter);
    }

或者更好的是，您将传递英雄本身（而不是字符串），并且该类将知道如何从英雄转换为相应的图像。

如何在MouseEnter上为许多pictureBox创建单个事件处理程序？

3 个答案: