Argumentexception was unhandled parameter not valid in C#

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Hi friends,

I have saved an image in my postgres database.

when i want to retrieve the image back in the picture box i am getting this error ArgumentException was unhandled Parameter not valid. i have pasted my codings.

What I have tried:

I have tried all sorts of solutions from internet but i could not solve this.
Please tell me where i have gone wrong.

C#

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

}

byte[] photo = System.Text.Encoding.Unicode.GetBytes(dr2["customerimage"].ToString());
pictureBox2.Image = byteArrayToImage(photo);

Posted 31-Jul-16 1:24am

cas tools

Updated 31-Jul-16 2:08am

RickZeeland

v2

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Ehsan Sajjad 31-Jul-16 7:47am

the error is coming on which line?

2 solutions

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OriginalGriff · Answer 1 · 2016-07-31T01:52:00

Solution 1

Simple: it's probably how you saved it that is causing the problem: Why do I get a "Parameter is not valid." exception when I read an image from my database?[^]

Posted 31-Jul-16 1:52am

OriginalGriff

RickZeeland · Answer 2 · 2016-07-31T02:08:00

Something like this:

C#

command = new NpgsqlCommand("select customerimage from mytable where id = 1);", conn);
Byte[] result = (Byte[])command.ExecuteScalar();

FileStream fs = new FileStream("database", FileMode.Create, FileAccess.Write);
BinaryWriter bw = new BinaryWriter(new BufferedStream(fs));

bw.Write(result);
bw.Flush();
fs.Close();
bw.Close();