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List Box double populating

Posted on 2011-09-29
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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();

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Question by:HawaiiDragon
2 Comments
 
LVL 11

Accepted Solution

by:
brutaldev earned 2000 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);
}
...

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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();
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