VS 2010 No Duplicates In Combo From Datasource

Sep 7, 2011

I'm having an issue wherein my combobox is populated from a datasource (access database >> [URL] and unwanted duplicates are shown.

-Example- [URL]

How can I make it so no duplicates arise?

Also on another note...I'm having difficulties linking the 2nd combo (model) to the first (make).

I would like the program to function in such a manner that

>makeCombo is populated from the database
>the user selects the Make of the vehicle from makeCombo
>modelCombo is populated from the database according to the make selected
>the user selects the Model of the vehicle from modelCombo
>user hits search
>datagrid is populated with appropriate vehicles

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Employee emp = new Employee();
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comHandledBySQt.DisplayMember = "FirstName" + " " + "LastName";

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VS 2008 Looping Through Combo Box TEXT - Regardless Of Datasource Impossible?

Jul 26, 2009

I was wondering how i can loop through a combo boxes items display item field - and return the value for each - i want this to be generic regardless of the combo boxes data source - or if the combo box has been populated with a string list / class etc

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[Code]...

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Sep 3, 2010

just to finalise this, how can i remove duplicates? i have tried this:

[Code]....

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Apr 6, 2012

I have the following coding in place which basically edits my text file, however with the information that is shown in the text file I want to remove all duplicates, is this possible?

Dim path As String = "c: est1.txt"
Dim sb As New StringBuilder
Dim sr As New StreamReader(path)

[Code]....

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Jun 7, 2011

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Sep 27, 2010

I started programming Visual Basic .NET a few weeks ago. I wanted to make a tool to remove duplicate lines from a listbox. I have the following

Dim strItems As New List(Of String) 'Make a list with originals
Dim strDup As New List(Of String) 'This list contains the duplicated lines

For i As Integer = 0 To ListBox1.Items.Count - 1

LabelChecking.Text = "Checking for duplicates: " & i & "/" & ListBox1.Items.Count - 1
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[Code].....

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VS 2010 Checking For Duplicates Before Inserting Into Access?

Mar 6, 2011

So I have the

Option Strict On
Option Explicit On
Imports System.Data.OleDb

[Code]....

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Nov 17, 2010

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VS 2010 Searching A List(Of Integer) For Duplicates?

Aug 24, 2009

Is there an easy way to search through a List(Of Integer) and find duplicates? Or do I need to do loops to search through it with each number, comparing it to each one?

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Jan 30, 2011

I use vb.net and windows form and sqlserver

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VS 2010 Several DataGridViews Using The Same DataSource?

Dec 22, 2010

In my project,, I have three forms. In my main form, I have a DataTable filled with some data from a MySQL-server.In the two other forms, I have a DataGridView which is bound to a BindingSource, which again is bound to the same DataTable in the main form. So It looks something like this:

Datagridview Datagridview
| |
BindingSource BindingSource

[code].....

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VS 2010 ComboBox DataSource And AutoComplete?

Aug 24, 2011

I have a ComboBox which is bound with a DataSource from (obviously) a Database. However, there are 659 different entries inside this Database and I was hoping to tack on AutoComplete.

I tried setting the Source to the ListItems since, after initialization and the data is bound, all the items necessary are in fact inside the ComboBox so I had assumed that it would pick that up. I was wrong. I tried using a Custom source but VS errored out saying that I couldn't do that since the ComboBox was bound.

My question is, how can I utilize AutoComplete's "Suggest" mode with a bound ComboBox?

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VS 2010 Determine Type In Collection In DataSource?

Sep 7, 2010

I am customizing a DataGridView control. The DataGridView is supposed to be bound to a collection of some type (be it a List(Of T) or ArrayList or whatever), and the idea is that one can easily determine (at design-time in this case) which properties of the type have to be shown in the grid and which column header name they should get. One can do this using an attribute. For example, if I have a class Person with Name, Age and HairColor and I don't want to show the HairColor property, and want to show the Name property as 'Person', I would use:

vb.net
Public Class Person
<Grid.GridOptions(displayName:="Person", visible:=True)> _
Public Property Name As String

[code]....

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Jan 19, 2011

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[Code]...

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Aug 1, 2011

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Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
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[code]....

Error:

Quote:

Items collection cannot be modified when the DataSource property is set.

Error line

Quote:

ListBox1.Items.Add(objreader)

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May 11, 2011

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In details: I have a datagridview (dg) and its datasource is set to dtItem. User will select some rows in dg and press 'delete' button.

dg.DataSource = dtItem;

I will perform a loop and delete the records. Here is the code eg:

foreach (DataGridViewRow drw in dg.Rows)
{
if (drw.Selected)

[Code]....

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I tried google and didn't find what I want. may be because i don't know the correct keywords I should use to search.

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Apple
Bannana
Peach
Pear

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Mar 7, 2011

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If i want to bring the target that i've selected from the combo box and post it in the listbox. what code would do tat?

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Nov 29, 2009

I found this code :
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

[code].....

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Jan 8, 2011

In the combo box:Public Class Form1

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End Sub
End Class

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1a. Website Name
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2a. Website Name
2b. Website Link
End Sub
End Class

Is there a way of doing this? I can do it in vb6, but after moving to 2010 everything is different and I am having to learn all over again,

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Oct 26, 2011

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I have a Form with a Tab control on it, one of the fields is the Apartment number which is a Combobox. It is displaying properly, however since it sits on one of the tabs when you scroll through the records its hard to remember what tenant you are dealing with.

I have a label on the top of the screen that shows the Tenant First/Last Name.
I also want to at what Apartment Number they are looking at.

I currently am trying this: I have also tried:

SelectedItem
SelectedText
SelectedValue

Column 0 of my combobox is the ID and Column 1 is the Text description.

[Code]....

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Combo table Name : TblPosition
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