如何加载图像并从任何地方访问它？

Question

我想从表单窗口浏览图像。我还创建了一个类并创建了一些过滤器。我可以从表格中读取这张图片。我的目标是在课堂上宣布它。并在任何地方使用这个图像。但我不知道我该怎么做。private void btn_BROWSE_Click(object sender, EventArgs e){    OpenFileDialog imge = new OpenFileDialog();     imge.Filter = "Extensions |*.bmp;*.jpg;*.jpeg;*.png;*.tif;*.tiff|"                  + "BMP|*.bmp|GIF|*.gif|JPG|*.jpg;*.jpeg|PNG|*.png|TIFF|*.tif;*.tiff|"                  + "Zip Files|*.zip;*.rar";    imge.ShowDialog();     string imgepath = imge.FileName;    pBox_SOURCE.ImageLocation = imgepath;//i'm browsing an image}private void sliderKernel_MouseUp(object sender, MouseEventArgs e){    Bitmap OriginalImage = new Bitmap(pBox_SOURCE.Image);} class Filters{     // (i would like to initialize my image in here not in form :) ) }

Answer 1

我将定义一个抽象类 Filter 并将每个过滤器实现为该类的继承人。

public abstract class Filter

{   

    public Bitmap Image { get; set; }

    public abstract void Apply();

}

一个实现是：

public class SliderKernel : Filter

{   

    public overrides void Apply()

    {

        //manipulates the Image property

    }

}

如果您想在任何地方使用该图像，您应该将其声明为类的静态成员：

public static class ImageContainer

{

     public static Bitmap Image { get; set; }

}

您可以在表单代码中使用所有这些，如下所示：

private void btn_BROWSE_Click(object sender, EventArgs e)

{

    OpenFileDialog imge = new OpenFileDialog(); 

    imge.Filter = "Extensions |*.bmp;*.jpg;*.jpeg;*.png;*.tif;*.tiff|"

                  + "BMP|*.bmp|GIF|*.gif|JPG|*.jpg;*.jpeg|PNG|*.png|TIFF|*.tif;*.tiff|"

                  + "Zip Files|*.zip;*.rar";

    imge.ShowDialog(); 

    string imgepath = imge.FileName;

    pBox_SOURCE.ImageLocation = imgepath;//i'm browsing an image

    //save the image to the container

    ImageContainer.Image = new Bitmap(pBox_SOURCE.Image);

}

private void sliderKernel_MouseUp(object sender, MouseEventArgs e)

{

    Filter filter = new SliderKernel () { Image = ImageContainer.Image };

    filter.Apply();

} 

Answer 2

我认为你应该将图像转换为字节数组

使用以下代码并将其存储在静态类中

public byte[] ImageToByteArray(System.Drawing.Image imageIn)

{

   using (var ms = new MemoryStream())

   {

      imageIn.Save(ms,imageIn.RawFormat);

      return  ms.ToArray();

   }

}

https://www.codeproject.com/Articles/15460/C-Image-to-Byte-Array-and-Byte-Array-to-Image-Conv

并使用此代码转为图形显示在pictureBox中

public Image byteArrayToImage(byte[] byteArrayIn)

{

     MemoryStream ms = new MemoryStream(byteArrayIn);

     Image returnImage = Image.FromStream(ms);

     return returnImage;

}