当将字节转换为图像时，错误“参数无效”

I am converting bytes into an image but I get an error

我正在把字节转换成图像，但是我得到了一个错误

Parameter is not valid

参数是无效的

I am pasting my code. Kindly check the code and suggested that was I am doing right or wrong.

我正在粘贴我的代码。请检查代码，并建议我做的是对的还是错的。

Image arr1 = byteArrayToImage(Bytess);

This is the function.

这是函数。

public static Image byteArrayToImage(byte[] byteArrayIn)
{
        if (null == byteArrayIn || byteArrayIn.Length == 0)
            return null;

        MemoryStream ms = new MemoryStream(byteArrayIn);
        try
          {
            Process currentProcess1 = Process.GetCurrentProcess();
            Image returnImage = Image.FromStream(ms);
            return returnImage;
          }
        catch (Exception ex)
          {
            MessageBox.Show(ex.Message);
          }
    }

I applied many techniques and solutions but it did not work for me

我应用了许多技术和解决方案，但对我不起作用

Your answer would be appreciated.

谢谢你的回答。

Thanks

谢谢

6 个解决方案

#1

try this

试试这个

    public Image byteArrayToImage(byte[] byteArrayIn)
    {

        System.Drawing.ImageConverter converter = new System.Drawing.ImageConverter();
        Image img = (Image)converter.ConvertFrom(byteArrayIn);

        return img;
    }

#2

After trying many things I found a way which has a little bit more control. In this example you can specify the pixel format and copy the bytes to a Bitmap.

在尝试了很多事情之后，我找到了一种更有控制力的方法。在本例中，您可以指定像素格式并将字节复制到位图中。

byte[] buffer = GetImageBytes();
var bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
var bitmap_data = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
Marshal.Copy(buffer, 0, bitmap_data.Scan0, buffer.Length);
bitmap.UnlockBits(bitmap_data);
var result = bitmap as Image;

#3

try this,

试试这个,

public Image byteArrayToImage(byte[] byteArrayIn)
{
     Image returnImage = null;
     using (MemoryStream ms = new MemoryStream(byteArrayIn))    
     {   
         returnImage = Image.FromStream(ms);     
     }
     return returnImage;
}

#4

            cmd.CommandText="SELECT * FROM `form_backimg` WHERE ACTIVE=1";

            MySqlDataReader reader6= cmd.ExecuteReader();

            if(reader6.Read())
            {
               code4 = (byte[])reader6["BACK_IMG"];   //BLOB FIELD NAME BACK_IMG
            }
            reader6.Close();

            MemoryStream stream = new MemoryStream(code4);   //code4 is a public byte[] defined on top                             
            pictureBox3.Image = Image.FromStream(stream);

#5

The problem is because, you are bringing it incorrectly from database. Try changing your code like this:

问题是，您从数据库中带来的错误。试试这样修改代码:

while (registry.Read())
{
   byte[] image = (byte[])registry["Image"];
}

#6

In my case I got the error since my base64 string had wrong encoding before calling Image.FromStream. This worked for me in the end:

在我的例子中，我得到了这个错误，因为我的base64字符串在调用Image.FromStream之前有错误的编码。这对我来说很有效:

byte[] bytes = System.Convert.FromBase64String(base64ImageString);

using (MemoryStream ms = new MemoryStream(bytes))
{
    var image = Image.FromStream(ms);
    image.Save(filePath, System.Drawing.Imaging.ImageFormat.Png);
}

#1