c# - 如何从字符串转到变量名称？

Question

我想使用 for 循环按顺序访问具有不同但有序名称的资源。例如:

class Program
{
    static void Main(string[] args)
    {     
        ExtractImages();
    }

    static void ExtractImages()
    {
        Bitmap bmp;

        for (int i = 0; i < 6; i++)
        {
            // Here I need something like: 
            // bmp = new Bitmap(Properties.Resources.bg + i);

            bmp = new Bitmap(Properties.Resources.bg0); // in order bg0..bg5
            bmp.Save("C:\\Users/Chance Leachman/Desktop/bg" + i + ".bmp");
        }
    }
}

有什么想法吗？它基本上是试图让一个 String 转到一个变量名。谢谢!

Answer 1

您可以使用 ResourceManager.GetObject Method

The GetObject method is used to retrieve non-string resources. These include values that belong to primitive data types such as Int32 or Double, bitmaps (such as a System.Drawing.Bitmap object), or custom serialized objects. Typically, the returned object must be cast (in C#) or converted (in Visual Basic) to an object of the appropriate type.

var bitmap = Properties.Resources.ResourceManager.GetObject("bg0") as Bitmap;

在 for 循环中:

for (int i = 0; i < 6; i++)
{
   string bitmapName = "bg" + i;
   bmp = Properties.Resources.ResourceManager.GetObject(bitmapName) as Bitmap;
   if(bmp != null)
       bmp.Save("C:\\Users/Chance Leachman/Desktop/bg" + i + ".bmp");
}