DropDownList is not displaying items on run time!

Question

0.00/5 (No votes)

See more:

Hi,

Please help as the code is all ok and this is a very famous code on the net. This code is working fine on C# but not working in VB.net. I don't know why on runtime it is not showing any item in the dropdownlist please help.

VB

Imports System.Data
Imports System.Configuration
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.Web.UI.HtmlControls

Imports System.Collections.Generic

Public Partial Class _Default
    Inherits System.Web.UI.Page
    Private regionCountryData As Dictionary(Of String, ListItem())

    Protected Overrides Sub OnInit(e As EventArgs)
        MyBase.OnInit(e)

        regionCountryData = New Dictionary(Of String, ListItem())()

        regionCountryData("Americas") = New ListItem() {New ListItem("USA"), New ListItem("Canada"), New ListItem("Brazil")}

        regionCountryData("EMEA") = New ListItem() {New ListItem("Switzerland"), New ListItem("Dubai"), New ListItem("Nigeria")}

        regionCountryData("Asia Pacific") = New ListItem() {New ListItem("India"), New ListItem("Japan"), New ListItem("Australia")}
    End Sub

    Protected Sub Page_Load(sender As Object, e As EventArgs)
        If Not IsPostBack Then
            RegionList.Items.Add("---Please select---")
            For Each region As String In regionCountryData.Keys
                RegionList.Items.Add(region)
            Next

            CountryList.Items.Add("---Please select---")
        End If
    End Sub

End Class

Posted 3-Jun-11 19:29pm

johnsmithconsultant

Updated 3-Jun-11 20:59pm

Sandeep Mewara

v2

Add a Solution

2 solutions

Solution 2

The Above Code is Working..........

Posted 3-Jun-11 23:21pm

lovejeet0707

Comments

^That's Aragon 4-Jun-11 5:29am

That's fine. Please don't post comment in the form of solution. Please use "Add comment" link below the solution for further conversation. Like I have added this comment below your response.

johnsmithconsultant 10-Jun-11 9:51am

No it's not! Getting no display in the dropdown I wonder why!

johnsmithconsultant 12-Jun-11 4:08am

Hey! This is what I was missing after Load event

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
Now it is working great.

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

^That's **Aragon** · Accepted Answer · 2011-06-03T22:37:00

I have tried your code and its working fine in the vb.net.(Assuming the drop down is available in ASPX) Is the dropdown RegionList is available in your aspx page or are you binding it dynamic ?

If you are creating it dynamic then you can do something like below.

ASPX

<asp:placeholder runat="server" id="plc" xmlns:asp="#unknown" />

Code Behind

VB

Dim RegionList As New DropDownList()
               RegionList.ID = "RegionList1"
               RegionList.Items.Add("---Please select---")
               For Each region As String In regionCountryData.Keys
                   RegionList.Items.Add(region)
               Next

               plc.Controls.Add(RegionList)