Datareader not reading image value

Question

4.20/5 (2 votes)

See more:

i am using datareader at page load to read and store database values in variables, my table includes both nvarchar and image type columns. At page load my 5 images value in database is not read by reader but others are perfectly read.

C#

    Byte[] img1 = null;
    Byte[] img2 = null;
    Byte[] img3 = null;
    Byte[] img4 = null;
    Byte[] img5 = null;
    SqlConnection con = new SqlConnection("Data Source=RAJ-PC\\SQLEXPRESS;Initial Catalog=Finder;Integrated Security=True");
protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            loadad();
        }
    }

protected void loadad()
    {
        SqlCommand cmd = new SqlCommand("sps_addetails", con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@ad_id", ad_id);
        cmd.Parameters.AddWithValue("@useremail", ses);
        con.Open();
        SqlDataReader reader = cmd.ExecuteReader();
        while (reader.Read())
        {
            rd_iam.SelectedValue = reader["iam"].ToString();
            dd_category.SelectedValue = reader["category"].ToString();
            c = Convert.ToInt16(reader["category"].ToString());
            dd_subcategory.SelectedValue = reader["subcategory"].ToString();
            txt_title.Text = reader["title"].ToString();
            txt_description.Text = reader["description"].ToString();
            txt_pername.Text = reader["contactname"].ToString();
            txt_mobile1.Text = reader["mobile1"].ToString();
            txt_mobile2.Text = reader["mobile2"].ToString();
            txt_landline1.Text = reader["landline1"].ToString();
            txt_landline2.Text = reader["landline2"].ToString();
            txt_email1.Text = reader["email1"].ToString();
            txt_email2.Text = reader["email2"].ToString();
            txt_website.Text = reader["website"].ToString();
            dd_country.Text = reader["country"].ToString();
            d = Convert.ToInt16(reader["country"].ToString());
            dd_state.Text = reader["state"].ToString();
            txt_pincode.Text = reader["pincode"].ToString();
            txt_address.Text = reader["address"].ToString();
            txt_lat.Text = reader["latitude"].ToString();
            txt_lon.Text = reader["longitude"].ToString();

            img1 = (byte[])reader["image1"];
            img2 = (byte[])reader["image2"];
            img3 = (byte[])reader["image3"];
            img4 = (byte[])reader["image4"];
            img5 = (byte[])reader["image5"];

        }
        con.Close();
        
    }

Posted 21-Apr-14 11:05am

Raj Negi

Add a Solution

Comments

ZurdoDev 21-Apr-14 20:20pm

What exactly is the issue? Does reader["image1"] have anything? Where are you using img1?

Raj Negi 22-Apr-14 1:46am

yes i have data in column image1 but it is not read by reader. I want to use this img1 to send this fetching data back to database.

Herman<T>.Instance 22-Apr-14 3:09am

Stream !

3 solutions

Solution 1

See MSDN

Posted 22-Apr-14 8:55am

Herman<T>.Instance

Comments

Raj Negi 25-Apr-14 16:43pm

thanks, it helps me a lot. Retreiving Image value is different from other datatypes.

Solution 2

Your code is perfect

It's in varbinary format or not?
Have you entered correct byte arrary data ?

See following articles which will help you

Storing and Retrieving Images from SQL Server using Microsoft .NET[^]
Convert-Image-to-Byte-Array-and-Byte-Array-to-Image-in-csharp.html[^]

Posted 22-Apr-14 16:11pm

sankarsan parida

Comments

Raj Negi 23-Apr-14 7:48am

here is my data in column image1:
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

[no name] 23-Apr-14 8:24am

is there any exception ?

Raj Negi 23-Apr-14 9:33am

no exception no error, it just retreive null value.

Raj Negi 23-Apr-14 9:36am

http://stackoverflow.com/questions/23206011/datareader-not-reading-image-value
Detail Question, may be it will help you to understand my problem.

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)

Raj Negi · Accepted Answer · 2014-04-25T10:45:00

ASP.NET

<img runat="server" id="image1" alt="" src="" height="100" width="100" />

C#

protected void LoadImage1()
    {
        SqlCommand cmd = new SqlCommand("sps_getimage", con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@flag", 1);
        cmd.Parameters.AddWithValue("@ad_id", ad_id);
        con.Open();
        SqlDataReader reader = cmd.ExecuteReader(System.Data.CommandBehavior.SequentialAccess);
        if (reader.HasRows)
        {
            reader.Read();
            MemoryStream memory = new MemoryStream();
            long startIndex = 0;
            const int ChunkSize = 256;
            while (true)
            {
                byte[] buffer = new byte[ChunkSize];
                long retrievedBytes = reader.GetBytes(0, startIndex, buffer, 0, ChunkSize);
                memory.Write(buffer, 0, (int)retrievedBytes);
                startIndex += retrievedBytes;
                if (retrievedBytes != ChunkSize)
                    break;
            }

            byte[] data = memory.ToArray();
            img1 = data;
            memory.Dispose();
            image1.Src = "data:image/png;base64," + Convert.ToBase64String(data);
        }
        con.Close();
    }

Datareader not reading image value

3 solutions

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0

Existing Members

...or Join us