将字节数组转换为图像时，参数无效

I want to save images in access database , I used OLE object .

我想在Access数据库中保存图像，我使用的是OLE对象。

The idea is to convert the image into bytes array , then adding the bytes array in the database.

我们的想法是将图像转换为字节数组，然后在数据库中添加bytes数组。

this is the function :

这是功能：

    public static byte[] ImageToByte(Image img)
    {
        ImageConverter converter = new ImageConverter();
        return (byte[])converter.ConvertTo(img, typeof(byte[]));
    }

this works fine .

这很好用。

When I want to return the bytes array to the image i get an exception :

当我想将bytes数组返回给图像时，我得到一个异常：

argument exception was unhandled Parameter is not valid.

参数异常未处理参数无效。

I tried two functions to convert the bytes array to the image :

我尝试了两个函数将bytes数组转换为image：

    public static Image ImageFromByte(byte[] image)
    {
        ImageConverter ic = new ImageConverter();
        Image img = (Image)ic.ConvertFrom(image);//here the exception comes
        return img;
    }

OR:

要么：

    public static Image ImageFromByte1(byte[] byteArrayIn)
    {
        MemoryStream ms = new MemoryStream(byteArrayIn);
        Image returnImage = Image.FromStream(ms);//here the exception comes
        return returnImage;
    }

What is the problem , how to fix it ?

有什么问题，如何解决？

1 个解决方案

#1

Try saving the image to disk, and see if that works. Change the filename and extension as you see fit.

尝试将图像保存到磁盘，看看是否有效。根据需要更改文件名和扩展名。

Something along these lines:

这些方面的东西：

            string path = @"c:\myimage.jpg";
            using (MemoryStream inputStream = new MemoryStream(byteArrayIn))
            {
                using (Stream file = File.Create(path))
                {
                    byte[] buffer = new byte[8 * 1024];
                    int len;
                    while ((len = inputStream.Read(buffer, 0, buffer.Length)) > 0)
                    {
                        file.Write(buffer, 0, len);
                    }
                } 
            }

EDIT: Writing image to disk works, and I guess you can see the image. Try this one:

编辑：将图像写入磁盘工作，我想你可以看到图像。试试这个：

            using (MemoryStream inputStream = new MemoryStream(byteArrayIn))
            {
                using (var image = Image.FromStream(inputStream))
                {
                    // see if this works.
                    // handle the image as you wish, return it, process it or something else.
                } 
            }

#1