Whats the error in my Code?

Question

0.00/5 (No votes)

See more:

Dear Honors,

In my windows application am store and retrieve the images... There is no problem while store the image.. But When I fetch the image data from database the following error is rising...

System.ArgumentException: Parameter is not valid.

Here is my code...

If possible kindly alter my code....

C#

private void cmbID_SelectedIndexChanged(object sender, EventArgs e)
       {
           try
           {
               Query = "Select Photo from tblTest where ID = '" + cmbID.Text + "'";
               SqlCmd = new SqlCommand(Query, SqlCon);

                 SqlDR = SqlCmd.ExecuteReader();
                 if (SqlDR.Read())
                 {

                     byte[] imageData = (byte[])SqlDR["Photo"];


                     Image newImage;

                     using (MemoryStream ms = new MemoryStream(imageData, 0, imageData.Length))
                     {
                         ms.Write(imageData, 0, imageData.Length);

                         //Set image variable value using memory stream.
                         newImage = Image.FromStream(ms, true);
                     }

                     //set picture
                     pictureBox1.Image = newImage;
                 }
                 SqlDR.Dispose();


           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.ToString());
           }
       }

Posted 4-Jan-12 0:26am

drveera

Updated 4-Jan-12 0:28am

Mehdi Gholam

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Wendelius · Answer 1 · 2012-01-04T12:16:00

Using debugger, try to narrow down from what line you're getting the exception.

One possible cause is because yuo have used literals in your SQL statement. You should use SqlParameter[^] in any case so your query would look like:

C#

SqlCmd = new SqlCommand(Query, SqlCon);
Query = "Select Photo from tblTest where ID = @id";
SqlCmd.Parameters.AddWithValue("@id,"cmbID.Text);
SqlDR = SqlCmd.ExecuteReader();