Question

这是我保存图片的方式。

    [HttpPost]
    public ActionResult Create(HttpPostedFileBase file)
    {
        if (file != null)
        {
            var extension = Path.GetExtension(file.FileName);
            var fileName = Guid.NewGuid().ToString() + extension;
            var path = Path.Combine(Server.MapPath("~/Content/Photos"), fileName);
            file.SaveAs(path);

            //...
         }
     }

我不想显示该位置的图像。我想先阅读它以便进一步处理。

在这种情况下如何阅读图像文件？

Answer 1

更新：将图像读取为字节[]

// Load file meta data with FileInfo
FileInfo fileInfo = new FileInfo(path);

// The byte[] to save the data in
byte[] data = new byte[fileInfo.Length];

// Load a filestream and put its content into the byte[]
using (FileStream fs = fileInfo.OpenRead())
{
    fs.Read(data, 0, data.Length);
}

// Delete the temporary file
fileInfo.Delete();

// Post byte[] to database

从历史的角度来看，这是我在澄清问题之前的答案。

您的意思是将其加载为BitMap实例吗？

 BitMap image = new BitMap(path);

 // Do some processing
 for(int x = 0; x < image.Width; x++)
 {
     for(int y = 0; y < image.Height; y++)
     {
         Color pixelColor = image.GetPixel(x, y);
         Color newColor = Color.FromArgb(pixelColor.R, 0, 0);
         image.SetPixel(x, y, newColor);
     }
 }

// Save it again with a different name
image.Save(newPath);

读取图像文件

1 个答案: