System.ArgumentException: Parameter is not valid.

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Hi am storing images in sql server. The datatype is Image.

while retrieving the Images from the database i getting error like System.ArgumentException: Parameter is not valid.

The error coming in this line "img = Image.FromStream(ms)".

C#

private void RetriveImage_Click(object sender, EventArgs e)
       {
           SqlConnection con = new SqlConnection(constr);
           con.Open();
           Image img;
           try
           {
               cmd = new SqlCommand("select Pic from emguimg where ID =" + cbxID.SelectedItem.ToString() + "", con);
               SqlDataReader dr = cmd.ExecuteReader();
               DataTable dt = new DataTable();
               dt.Load(dr);
               byte[] bytes = (byte[])((byte[])dt.Rows[0]["Pic"]);
               MemoryStream ms = new MemoryStream(bytes);
               ms.Write(bytes, 0, bytes.Length);
               img = Image.FromStream(ms);

               PicBox.Image = img;
               PicBox.SizeMode = PictureBoxSizeMode.StretchImage;
               PicBox.BorderStyle = BorderStyle.Fixed3D;
               ms.Flush();
               ms.Close();
}
           catch(Exception ex)
           {
               WriteLogMessage(ex.ToString());
           }
       }

Posted 28-Jun-15 21:38pm

MSVelu8788

Updated 28-Jun-15 22:29pm

Andy Lanng

v2

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Andy Lanng 29-Jun-15 4:32am

What type is your image?
FromStream expects one of the following:
*.BMP, *.GIF, *.JPEG, *.PNG, *.TIFF

MSVelu8788 29-Jun-15 6:16am

its JPEG

Sreekanth Mothukuru 29-Jun-15 5:08am

Two questions here
1. What data do you see in the image column.
2. Why are you type casting twice

MSVelu8788 29-Jun-15 6:35am

0x53797374656D2E44726177696E672E4269746D6170 <binary data=""> This is data i see in my cloumn and i delete one casting but same error..

Sreekanth Mothukuru 29-Jun-15 7:09am

Seems like you are not inserting the image properly. Check the code to insert image into database.

MSVelu8788 3-Jul-15 3:18am

The datatype is Image. Now i change the datatype into varchar its inserting and no error coming.

Sreekanth Mothukuru 3-Jul-15 3:21am

While inserting the image you need to pass the whole image as memory stream or byte[] to the DB. Check to see is you get the stream length before inserting for different images.

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OriginalGriff · Answer 1 · 2015-06-28T22:57:00

Most likely, it's where you stored the image: your code is vulnerable to SQL Injection which implies that yoiu always concatenate strings to form SQL commands. Not only does that give your users the chance to damage or destroy your database, it also means that image storage doesn't work. See here: Why do I get a "Parameter is not valid." exception when I read an image from my database?[^]

"Hello Griff thanks for your reply. I receive the {byte[21]}"

Yes...and what does that spell out?

[0] 83    S
[1] 121   y
[2] 115   s
[3] 116   t
[4] 101   e

[5] 109   m
[6] 46    .
[7] 68    D
[8] 114   r
[9] 97    a
[10] 119  w
[11] 105  i
[12] 110  n
[13] 103  g
[14] 46   .

So follow the link, read what it says, and pay attention to the Section: "Before I close..."