error: parameter is not valid while retreiving image from database using c# in windows based application

Question

0.00/5 (No votes)

See more:

I keep getting this error: parameter not valid while retreiving the image from the database.I am using the following code.Any help would really be appreciated.

C#

try
           {
               if (con.State != ConnectionState.Open)
               {
                   con.Open();
               }
               SqlCommand cmd1 = new SqlCommand("select * from hbet_info where id='"+textBox1.Text+"'", con);
               SqlDataReader dr = cmd1.ExecuteReader();
               if (dr.Read())
               {
                   textBox5.Text = dr["NAME"].ToString();
                   //textBox1.Text = dr["id"].ToString();
                   byte[] b = new byte[0];
                   b = (Byte[])(dr["img"]);
                  // ms.Seek(0, SeekOrigin.Begin);
                   MemoryStream ms = new MemoryStream(b);

                   pictureBox1.Image = Image.FromStream(ms);

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

Posted 12-Dec-12 22:51pm

Gourav Sharma from Jammu

Updated 12-Dec-12 23:30pm

Rahul Rajat Singh

v2

Add a Solution

Comments

Killzone DeathMan 13-Dec-12 5:02am

I am not sure but:
textBox5.Text = dr.GetString("NAME");

instead of:
textBox5.Text = dr["NAME"].ToString();

Right now, I have nothing to try the code... sorry!

3 solutions

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)

StackQ · Answer 1 · 2012-12-12T23:23:00

C#

public class Document1
        {        
            public byte[] DocContent { get; set; }
        }

public byte[] Attachmnt;
Document1 objDoc = new Document1();
objDoc.DocContent = Attachmnt;//here u will get ur date into byte[] format

File.WriteAllBytes(FileName, objDoc.DocContent);
                writeStream = new FileStream(FileName, FileMode.Create);
                BinaryWriter writeBinay = new BinaryWriter(writeStream);
                writeBinay.Write(objDoc.DocContent);
                writeBinay.Close();
                writeStream.Close();

By this ur data will be created into file, now u can open this file select all data from this file and display them into textbox,after than u can also delete this file.

phil.o · Answer 2 · 2012-12-13T02:49:00

SqlCommand cmd1 = new SqlCommand("select * from hbet_info where id='"+textBox1.Text+"'", con);

=> Is the id field an integer one ?
If so, you should NOT put its value between quotes.
Moreover, it is a very very bad habit to construct sql requests with string concatenations.

Better :

SqlCommand cmd1 = new SqlCommand("select * from hbet_info where id=@id", con);
cmd1.Parameters.AddWithValue("id", int.Parse(textBox1.Text));

nagalkumar · Answer 3 · 2012-12-12T23:07:00

Solution 1

Hi,
Insted of this line b = (Byte[])(dr["img"]);
use

b = (Byte[])dr["img"];

Posted 12-Dec-12 23:07pm

nagalkumar

error: parameter is not valid while retreiving image from database using c# in windows based application

3 solutions

Solution 2

Solution 3

Solution 1

Add your solution here

Preview 0