Solved

List Box double populating

Posted on 2011-09-29
2
191 Views
Last Modified: 2012-06-27
I have a new one for you guys...

I have a list box that is populated via a stored procedure .... Now here is the wierd thing my list box is being double populated... that is if I have only two names in my database where the reader is reading from i.e. Adams and Zach it is printing them ouit twice adams zach adams zach...

its like the method is being called twice...

does anyone know how to stop it from doing that???

Matt



SqlConnection con = new SqlConnection(Settings.GetConfigValue("PARK_IRB_V1_11_19_2010", "IRB2010ConnectionString"));
            con.Open();
            SqlCommand cmd = new SqlCommand("P_sp_PopulateNewFactSup", con);
            SqlDataReader r = cmd.ExecuteReader();
            DataTable dt = new DataTable();
            while (r.Read())
            {
                ListItem i = new ListItem(r["truename"].ToString().Trim(), r["ParkID"].ToString().Trim());
                LBFactSupNew.Items.Add(i);
            }
            con.Close();

Open in new window

0
Comment
Question by:HawaiiDragon
2 Comments
 
LVL 11

Accepted Solution

by:
brutaldev earned 500 total points
ID: 36817475
Setup breakpoints and check the stack trace for each call that goes into the method code you have provided. That way you can find why the extra call is getting made.

To avoid the list getting extra items in the case where you can't stop the extra calls, just clear it at the beginning of while loop:
...
LBFactSupNew.Items.Clear();
while (r.Read())
{
  ListItem i = new ListItem(r["truename"].ToString().Trim(), r["ParkID"].ToString().Trim());
  LBFactSupNew.Items.Add(i);
}
...

Open in new window

0
 

Author Closing Comment

by:HawaiiDragon
ID: 36817486
I did this thank you for your help

 SqlConnection con = new SqlConnection(Settings.GetConfigValue("PARK_IRB_V1_11_19_2010", "IRB2010ConnectionString"));
            con.Open();
            SqlCommand cmd = new SqlCommand("P_sp_PopulateNewFactSup", con);
            SqlDataReader r = cmd.ExecuteReader();
            DataTable dt = new DataTable();
            LBFactSupNew.Items.Clear();
            while (r.Read())
            {
                ListItem i = new ListItem(r["truename"].ToString().Trim(), r["ParkID"].ToString().Trim());
                LBFactSupNew.Items.Add(i);
            }
            con.Close();
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

This article introduced a TextBox that supports transparent background.   Introduction TextBox is the most widely used control component in GUI design. Most GUI controls do not support transparent background and more or less do not have the…
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…
Video by: Mark
This lesson goes over how to construct ordered and unordered lists and how to create hyperlinks.
Many functions in Excel can make decisions. The most simple of these is the IF function: it returns a value depending on whether a condition you describe is true or false. Once you get the hang of using the IF function, you will find it easier to us…

910 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

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now