CODEWITHSUNDEEP
c#.netimagearraysmemorystream
Umair Aslam
Umair Aslam

Reputation: 207

Error" Parameter is not valid " while converting Bytes into Image

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

Parameter is not valid

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

Image arr1 = byteArrayToImage(Bytess);

This is the function.

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

Your answer would be appreciated.

Thanks

Upvotes: 16

Views: 73621

Answers (6)

Ankush Singhal
Ankush Singhal

Reputation: 31

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);

Upvotes: -1

sangram parmar
sangram parmar

Reputation: 8726

try this

public Image byteArrayToImage(byte[] byteArrayIn)
{
    System.Drawing.ImageConverter converter = new System.Drawing.ImageConverter();
    Image img = (Image)converter.ConvertFrom(byteArrayIn);

    return img;
}

Upvotes: 13

Quantumleapr
Quantumleapr

Reputation: 1

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:

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);
}

Upvotes: -1

user8250086
user8250086

Reputation: 1

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

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

Upvotes: -1

Ertyui
Ertyui

Reputation: 908

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.

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;

Upvotes: 8

Mohan Gopi
Mohan Gopi

Reputation: 247

try this,

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

Upvotes: -2

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