Solved

Error in inserting record

Posted on 2008-06-15
8
213 Views
Last Modified: 2013-12-17
I have code as listed below. This code is working perfectly if i use MS Access (oleDbConnection) but it giving me error when i convert to use sql server 2005 express edition.
protected void btnAdd_Click(object sender, EventArgs e)
    {
 
        SqlConnection conNwind;
        SqlCommand cmdSelect, cmdSelectID;
        SqlDataReader dtrCustomer;
 
 
        string connStr = ConfigurationManager.ConnectionStrings["ConnectionNWind"].ConnectionString;
        conNwind = new SqlConnection(connStr);
 
 
        conNwind.Open();
 
        string select = "Select * from Customers where CustomerID=@ID";
        cmdSelectID = new SqlCommand(select, conNwind);
 
        cmdSelectID.Parameters.AddWithValue("@ID", txtId.Text);
        dtrCustomer = cmdSelectID.ExecuteReader();
 
 
        if (dtrCustomer.Read())
        {
            Label1.Text = "ID already exist!";
 
        }
 
        else
        {
            string strInsert = "Insert into Customers(CustomerID,Companyname,Contactname,Phone) values(@customerId,@companyname,@contactname,@phone)";
 
            cmdSelect = new SqlCommand(strInsert, conNwind);
 
            cmdSelect.Parameters.AddWithValue("@customerId", txtId.Text);
            cmdSelect.Parameters.AddWithValue("@companyname", txtCompanyName.Text);
            cmdSelect.Parameters.AddWithValue("@contactname", txtContactName.Text);
            cmdSelect.Parameters.AddWithValue("@phone", txtPhone.Text);
 
            int intAdd = cmdSelect.ExecuteNonQuery();
 
            if (intAdd != 0)
                Label1.Text = "Record successfully added into database!";
 
            else
                Label1.Text = "Record not added into database!";
        }
 
        dtrCustomer.Close();
        conNwind.Close();
 
    }

Open in new window

0
Comment
Question by:nisha_
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
8 Comments
 
LVL 53

Expert Comment

by:Dhaest
ID: 21791138
Where do you get an error and what error do you get when you change it to sql server 2005 express edition?
0
 

Author Comment

by:nisha_
ID: 21791143
Error message : There is already an open DataReader associated with this Command which must be closed first.
0
 
LVL 53

Accepted Solution

by:
Dhaest earned 250 total points
ID: 21791219
Where do you get that error ? Can you try this.
protected void btnAdd_Click(object sender, EventArgs e)
    {
 
        SqlConnection conNwind;
        SqlCommand cmdSelect, cmdSelectID;
        SqlDataReader dtrCustomer;
 
 
        string connStr = ConfigurationManager.ConnectionStrings["ConnectionNWind"].ConnectionString;
        conNwind = new SqlConnection(connStr);
 
 
        conNwind.Open();
 
        string select = "Select * from Customers where CustomerID=@ID";
        cmdSelectID = new SqlCommand(select, conNwind);
 
        cmdSelectID.Parameters.AddWithValue("@ID", txtId.Text);
        dtrCustomer = cmdSelectID.ExecuteReader();
 
 
        if (dtrCustomer.Read())
        {
            Label1.Text = "ID already exist!";
            dtrCustomer.Close();
        }
 
        else
        {
            dtrCustomer.Close();
            string strInsert = "Insert into Customers(CustomerID,Companyname,Contactname,Phone) values(@customerId,@companyname,@contactname,@phone)";
 
            cmdSelect = new SqlCommand(strInsert, conNwind);
 
            cmdSelect.Parameters.AddWithValue("@customerId", txtId.Text);
            cmdSelect.Parameters.AddWithValue("@companyname", txtCompanyName.Text);
            cmdSelect.Parameters.AddWithValue("@contactname", txtContactName.Text);
            cmdSelect.Parameters.AddWithValue("@phone", txtPhone.Text);
 
            int intAdd = cmdSelect.ExecuteNonQuery();
 
            if (intAdd != 0)
                Label1.Text = "Record successfully added into database!";
 
            else
                Label1.Text = "Record not added into database!";
        }
         
        conNwind.Close();
 
    }

Open in new window

0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 7

Expert Comment

by:AUmidh
ID: 21791221
make a try of the following
add this statement dtrCustomer.Close();
before the following.
string strInsert = "Insert into Customers(CustomerID,Companyname,Contactname,Phone) values(@customerId,@companyname,@contactname,@phone)";

I am not sure about this but may be.


0
 
LVL 19

Expert Comment

by:elimesika
ID: 21791226
Try
     SqlConnection conNwind;
        SqlCommand cmdSelect, cmdSelectID;
        SqlDataReader dtrCustomer;
 
 
        string connStr = ConfigurationManager.ConnectionStrings["ConnectionNWind"].ConnectionString;
        conNwind = new SqlConnection(connStr);
 
 
        conNwind.Open();
 
        string select = "Select * from Customers where CustomerID=@ID";
        cmdSelectID = new SqlCommand(select, conNwind);
 
        cmdSelectID.Parameters.AddWithValue("@ID", txtId.Text);
        dtrCustomer = cmdSelectID.ExecuteReader();
 
 
        if (dtrCustomer.Read())
        {
            Label1.Text = "ID already exist!";
            dtrCustomer.Close();
            conNwind.Close();
 	    return;
        }
 
        else
        {
            dtrCustomer.Close();
            string strInsert = "Insert into Customers(CustomerID,Companyname,Contactname,Phone) values(@customerId,@companyname,@contactname,@phone)";
 
            cmdSelect = new SqlCommand(strInsert, conNwind);
 
            cmdSelect.Parameters.AddWithValue("@customerId", txtId.Text);
            cmdSelect.Parameters.AddWithValue("@companyname", txtCompanyName.Text);
            cmdSelect.Parameters.AddWithValue("@contactname", txtContactName.Text);
            cmdSelect.Parameters.AddWithValue("@phone", txtPhone.Text);
 
            int intAdd = cmdSelect.ExecuteNonQuery();
 
            if (intAdd != 0)
                Label1.Text = "Record successfully added into database!";
 
            else
                Label1.Text = "Record not added into database!";
                
            conNwind.Close();
        }
 

Open in new window

0
 

Author Comment

by:nisha_
ID: 21791255
putting dtrCustomer.Read() before insert statement make the program work. But why i should do like that since my insert statement not using data reader.
0
 
LVL 53

Expert Comment

by:Dhaest
ID: 21791298
A datareader opens a transaction. As long as it's not commited (or closed), the connection will be exclusive used by your datareader.
0
 

Author Comment

by:nisha_
ID: 21791307
Then how it can work in MS Access even i closed the datareader after insert statement?
0

Featured Post

[Webinar] Learn How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

We all know that functional code is the leg that any good program stands on when it comes right down to it, however, if your program lacks a good user interface your product may not have the appeal needed to keep your customers happy. This issue can…
Introduction Hi all and welcome to my first article on Experts Exchange. A while ago, someone asked me if i could do some tutorials on object oriented programming. I decided to do them on C#. Now you may ask me, why's that? Well, one of the re…
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…

626 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question