How to customize drop down list item ?

Question

1.00/5 (1 vote)

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Hello and good day !

I'm using vb.net, I have something like this :

VB

If textbox1.Text = "abc" Then
     ddl1.Items.Add(1)
     ddl1.Items.Add(2)
     ddl1.Items.Remove(3)
     ddl1.Items.remove(4)
End If

If textbox1.Text = "efg" Then
     ddl1.Items.Add(3)
     ddl1.Items.Add(4)
     ddl.Items.Remove(1)
     ddl.Items.Remove(2)
End If

How I'm going to make when I key-in "abc" more than one time its only add once and not repeated. same goes when I insert "efg" ?

Thank you for your concern.

Posted 10-Sep-13 16:57pm

gogole_yuna

Updated 10-Sep-13 19:21pm

Manoj K Bhoir

v2

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2 solutions

Solution 1

Handle the changed event and check for duplicates in that event.

This post[^] might help.

Posted 10-Sep-13 17:13pm

Abhinav S

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gogole_yuna 10-Sep-13 23:30pm

@Abhinav huhu could not really understand. I need to handle the change event and check for duplicates on drop down list ?

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**Manoj K Bhoir** · Accepted Answer · 2013-09-10T19:30:00

While Adding Values In Drop Down List You Can Check for the Item already Exist Or Not using Contains Function.
If Item already exist then don't add this Item In Drop Down List.
See the below code:

VB

If Not ddl.Items.Contains("TestValue") Then
     'Add to Drop Down List
Else
     'Else Do Nothing
End If

I hope it will help you. :)