Drop Down List Giving Me Error On Submit

May 17, 2012

I am trying to check to see if a value in a textbox is already in a drop down list. If it is, I will simply write to a label. If the textbox value is not in the dropdown list then I want it to write to the dropdownlist.

I am getting the following error Collection was modified; enumeration operation may not execute

HTML

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
For Each value In DropDownList1.Items

[Code]....

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Drop Down List Value Remain Selected Even After Submit Button Click?

May 17, 2007

I have 2 drop down lists and 1 submit button. It works such that after the user has selected values from BOTH the drop down lists, then the user will click a "Search" button. My problem is, after the user click the "Search" button, the second drop down list is no longer displayed with the selected value, instead it displayed a default value. May I know how can I make sure the selected value remain selected even after the user clicks the "Search" button on the page?

For your info, my coding goes as

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim strSelectedUsername As String

[Code]....

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Cannot Get Value From Drop Down List And Get INSERT Error

Mar 31, 2011

I cannot get the value from the drop down list and I not sure what's wrong with the declaration and the code.

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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MVC 3 razor VB.NET project. I have resorted to manual building a list for a drop down box so I can insure certain values are available in the select list and also to control what the first item is in the list. The below is my code snippet for the part that is giving me problems..

[Code]...

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Does anyone know if it is possible to make a drop down list control (when clicked) list its contents above the item, rather than below? Effectively, I need a drop up list rather than a drop down list...

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Is it possible to reorder the elements of a drop down list (combobox) via drag and drop?For example, when the list is dropped down, I want the user to be able to drag the items up or down to reorder them. I tried this (and some google searching) but I'm wondering if its just not possible:

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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i want to stop accepting form drop down listbox if certrain criteria is not met [code]how i can cancel the selection of drop down list?

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[Code]...

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MyBase.Edit(source, rowNum, bounds, [readOnly], instantText, cellIsVisible)

Whole code is given below :

[Code].....

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[Code]...

Intellisense highlights no problems and if I Build the web site in VS I get a few warnings about schema information in the web.config (unrelated), otherwise no problem.

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Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim strURL As String

[Code].....

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Private Sub Show_Btn_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Show_Btn.Click
Using connection As New OleDbConnection("Provider=Microsoft.Jet.Oledb.4.0;Data Source=BankAccount.mdb")
connection.Open()
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[Code]...

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Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
Me.Personal1TableAdapter1.Update(Me.HRDataSet4)
Dim myConnection As OleDbConnection
Dim myCommand As OleDbCommand
[Code] .....

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My web.config is the same for all pages in the intranet and I cannot see any differences in my ASP.Net page compared to pages where web methods work.[code]...

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vb
'Explicitly imports a namespace into a page, making all classes and interfaces of the imported namespace available to the page.

[code]....

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Here's how I declare the animation (as a storyboard):

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And here's the code for the function that is failing:

[Code]...

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[Code]...

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[Code]...

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From a remote client, I opened this shared folder and try to execute and it was giving me an ODBC related error, basically it was not able to detect the SQL connection.What I want to achieve is to have one EXE. The program did not throw any other errors.

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Public Shared Function GetData(ByVal id As Integer) As List(Of SomeClass)
Dim command As New OracleCommand
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[code]....

This function is giving an ORA-00911 invalid character error. I have other methods of the same style and these are functioning correctly.

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CODE:

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[Code]...

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[code]...

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