How do I make a dropdown list distinct?

Question

2.00/5 (1 vote)

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I will have repeat numbers everytime i change selected index

What I have tried:

using (SqlConnection con = new SqlConnection(conString))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
con.Open();
ddl.DataSource = cmd.ExecuteReader();
ddl.DataTextField = text;
ddl.DataValueField = value;
ddl.DataBind();
con.Close();
}
}
sqlStr.AppendLine("SELECT LoanTerm, LoanRate From TDLoanRate ");
sqlStr.AppendLine("where GETDATE() between LoanEffectFrom and LoanMaturity");

Posted 28-Jul-16 3:48am

Member 12652110

Updated 28-Jul-16 4:12am

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Karthik_Mahalingam 28-Jul-16 9:57am

what is the issue, and also your code is incomplete

1 solution

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Afzaal Ahmad Zeeshan · Accepted Answer · 2016-07-28T04:12:00

Your question title has the answer in itself, if you wanted to select the DISTINCT content, use the SQL query:

SQL

SELECT DISTINCT LoanTerm, LoanRate From...

This would return distinct records, for more on how to use this, please read this: ALL, DISTINCT, DISTINCTROW, TOP Predicates (Microsoft Access SQL) [Access 2007 Developer Reference][^].

Secondly, reading your question second time,

Quote:
I will have repeat numbers everytime i change selected index

Makes me think that maybe the problem is that you are having multiple records in the dropdown itself. For that, I simply clear the previous items in the dropdown and load the new list in the dropdown. You can try clearing the data source and set it again, or change the ItemsSource value to set it again.