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MemoryStream mstream = new MemoryStream(img);
pictureBox1.Image = System.Drawing.Image.FromStream(mstream);
At the second line i have to face an exception that invalid parameter.Kindly help me.
my field data type is blob and i have to show this picture in c# project.

See here: Why do I get a "Parameter is not valid." exception when I read an image from my database?[^] - it's Sql Server based, but it's exactly the same problem (and solution) with MySql.
Asim Shahid 19-Sep-14 15:56pm
i am facing still problem exception parameter is not valid is generated.
OriginalGriff 19-Sep-14 16:26pm
And did you read the bit at the bottom?
"Before I close...
No, you can't retrieve the image data for the images you already stored wrongly - you will have to delete them all, and save them to the DB correctly!"

Because if you didn't...
string query1 = "Select * from members where ID='";
           query1 = query1 + txtid.Text + "'";
           cmd = new MySqlCommand(query1, con);
           MySqlDataReader d1 = cmd.ExecuteReader();
           while (d1.Read())
                   byte[] data = (byte[])d1["image"];
                   using (MemoryStream stream = new MemoryStream(data))
                       pictureBox1.Image = new Bitmap(stream);
Do have a look at the following article.

Display Images from SQL server

I hope it will solve your problem. :)

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