update record of database

Question

0.00/5 (No votes)

See more:

hi every one
i have a problem in update button.
when i update the record then record removed from the database instead of update???
here is the code of update what's wrong here please guide me ?

thanks in advance

C#

protected void btnupdate_Click(object sender, EventArgs e)
{

            SqlConnection con = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=D:\Final Project\FinalProject\FinalProject\App_Data\Record.mdf;Integrated Security=True;User Instance=True");


            string query="Update student set firstname='"+bolobj.firstname+"',lastname='"+bolobj.lastname+"',faname='"+bolobj.fname+"',fcellno='"+bolobj.fcellno+"',fnic='"+bolobj.fnic+"',homeno='"+bolobj.homeno+"',gender='"+bolobj.gender+"',days='"+bolobj.days+"',month='"+bolobj.month+"',year='"+bolobj.year+"',classname='"+bolobj.classname+"'where StdId='"+txtID.Text+"'";

            SqlCommand com = new SqlCommand(query, con);
            con.Open();
            if (com.ExecuteNonQuery() > 0)

                con.Close();

               {
                bolobj.firstname = txtfirstname.Text;
                bolobj.lastname = txtlastname.Text;
                bolobj.fname = txtfaname.Text;
                bolobj.fcellno = txtfcellno.Text;
                bolobj.homeno = txthome.Text;
                bolobj.fnic = txtfnic.Text;
                bolobj.classname = drpclassno.SelectedItem.Text.ToString();
                bolobj.gender = drpgender.SelectedItem.Text.ToString();
                bolobj.days = drpday.SelectedItem.Text.ToString();
                bolobj.month = drpmonth.SelectedItem.Text.ToString();
                bolobj.year = drpyear.SelectedItem.Text.ToString();

                }
                 Label1.Text = " Update Successfully...";


}

Posted 21-Feb-13 5:39am

Wajid Khaksar

Updated 21-Feb-13 7:42am

DinoRondelly

v2

Add a Solution

Comments

Taha Akhtar 21-Feb-13 14:27pm

add a breakpoint to string query.. then see the value of your query.

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)

Susheel Kumar Verma · Answer 1 · 2013-02-21T05:57:00

Try This one :-

C#

protected void Button1_Click(object sender, EventArgs e)
       {
           Con = new SqlConnection("Your Connection String");

           Con.Open();
           Cmd = new SqlCommand("update employee set 
           Emp_Name='"+TextBox1.Text+"' where Emp_ID=5",Con);
           

          
           if (Cmd.ExecuteNonQuery() > 0)
           {

                   Con.Close();
                   Response.Write("Done..");
           }


          
       }