Populating Drop Down List From Another Thread In ASP.NET?

Feb 22, 2009

I have multiple drop down lists on a page. They all contain list of countries. So in the background I am getting countries from database and caching them. I would like to populate those drop down lists from another thread. I am also using AJAX controls so I wanted that it all happens at the same time. And also after a user selects a country I want that towns from that country show to the user, and I want that getting towns happens also in another thread so that user can fill other controls while the list is not yet loaded.

I have read somewhere that I should give Page as a parameter to that thread and then find that drop down lists and populate them. But that is not working.

Here is a function that is called when another thread starts:

protected void GetCountries(object o)
{
if (Session["Countries"] == null)
{

[Code]....

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[Code]...

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Private Sub cmbClassLists_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles cmbClassLists.MouseDown
If cmbClassLists.DroppedDown And Not cmbClassLists.SelectedIndex = -1 Then

[code].....

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Protected Sub btnAdd_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAdd.Click
Dim myPhoneNumber As String = txtPhoneNumber.Text
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[code]....

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[code]....

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Imports MySql.Data.MySqlClient
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Dim conn As MySqlConnection

[code]....

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Public Class Form1
Private MouseIsDown As Boolean = False
'rivate Functionlist As ListBox

[code]....

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Here is the code:

Public Class Form1
Dim fonts as New Drawing.Text.InstalledFontCollection
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[code]....

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I'm quite new to Visual Basic - using Visual Studio 2008 and can't seem to find a way to do the following:

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Protected Sub registerStudButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles registerStudButton.Click

[Code]...

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May I know how to do it in ASP.NET using VB language?

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DesignationTable From my table i like to display only two in my drop down list

[code].....

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Dim sched = scheduleDateVal.toString("d"
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End If

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Sub Worksheet_Change(ByVal Target As Range)
If InRange(Target, Range("AngleConf")) Then
Call resistance 'Actualiser le r�sultat mecanique

[code].....

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My dropdownlist is set to databine like this...

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[Code]....

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Dim selectedIntake As String = intakeDropDownList.SelectedItem.Text()
Dim selectedSupervisor As String = supervisorDropDownList.SelectedItem.Text()
.supervisor_ID = selectedSupervisor(0), _

[Code]....

This is the error message I get :

The INSERT statement conflicted with the FOREIGN KEY constraint "FK_student_Details_lecturer_Details". The conflict occurred in database "SKTM-AAS", table "dbo.lecturer_Details", column 'supervisor_ID'. The statement has been terminated.

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Public Class Parameters
Public Property server As String
Public Property replica As String
Public Propery path As String
End Class

[Code]...

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