Asp.net - Duplicate Items In Dropdownlist?

Jan 5, 2011

I'm designing a web page with two dropdownlists, one for the Make of a car, the other for the Model, both bound to a database with separate SQLDataSources, and using a distinct statement. I add "All" at the top of both by setting appendDataBoundItems = true and adding items named all. Then when I fill the Make with a querystring all the model items get added twice (but only the databound items).

Here's my code:

<asp:DropDownList ID="DropDownMake" runat="server"
DataSourceID="SqlMakes" DataTextField="Make" DataValueField="Make"
AppendDataBoundItems="True" EnableViewState="False" AutoPostBack="True">

[Code].....

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Mar 27, 2012

I have a List object and I want to remove the duplicated items but leaving at least one of the duplicated items in the list;I wrote something like this however I would optimize this code for better performance, is there something faster?

Const chars As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
Dim rnd As New Random()
Dim mylist As List(Of String) = Enumerable.Range(1, 100).Select(Function(i)

[code].....

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My visual studio 2005 has been running great up till now The menu items in the menu toolbar display exactly as follows:File File Edit Edit View View File File Edit Edit View View Tools Tools Tools Tools Window Window Community Community Help Help Window Window Community Community Help Help

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This is before I open a project and visual studio is on the start page. The 'duplicates' do not go away even when a project is open.When project is open, Solution explorer displays duplicate images as well

I've tried all the following but still cannot get it to display normally. Restored my computer to a time when it was working ok. Full scan on my computer with AVG premium which includes spyware etc (No viruses , etc found) All software is updated fully

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Mar 14, 2010

how to add an item to a dropdownlist.i have tried this

DropDownList1.Items.Insert(0,
"Abu Dhabi")
DropDownList1.Items.Add(
"Dubai")

but nothing is showing in the dropdownlist

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Nov 23, 2009

Using VB.NET I want to add a data's in the Datagridviewcombobox column

Code.

cmd = New SqlCommand("SELECT Sched_Name from tb_Sched_Master", con)
ada = New SqlDataAdapter(cmd)
ada.Fill(ds1)

[code]....

But I cannot get the data's, what wrong in my code.

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I would like to disable a specific items from DropDownList. I have below code but it does not working. DropDownList have 5 items.And,I'm getting error:Index was out of range. Must be non-negative and less than the size of the collection.Parameter name: index

Protected Sub CheckBox1_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged
Dim X As Integer = 0 <> 1
DropDownList1.Items(X).Enabled = False
End Sub

But, if I add a different value for X, then it disable 1st and 2nd item.

Protected Sub CheckBox1_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged
Dim X As Integer = 0 or 1
DropDownList1.Items(X).Enabled = False
End Sub

My goal is if I would have a 365 items in DropwDownList to disable items for example between 120 and 150.

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Mar 8, 2010

I have an Web application that retrieves some db info and send it out to an html table. All created on the fly in vb code behind. For every post (row) in the db I also fill puts an instance of a Dropdownlist with items read from the db. That means that for every row I read from the database I read the same db info into the Dropdownlist (see the skeleton example below). A lot of overhead I think. It must be possible to create the Dropdownlist once before the loop and copy from that instance in the loop.

Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim cboCombo2 As DropDownList
Dim i As Integer
[Code] .....

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May 31, 2012

I have a List(of String). For example: {"C1", "C12", "C10", "C1", "C6", "C22", "C1", "C6"}. I am trying to write a function to give me a list of duplicates: {"C1", "C6"} in the list. Each duplicate will be listed only once. The function I wrote does give me anything back at all. I can't figure out why. how to translate that syntax into VB.net since I am not up to speed on LINQ yet. It is here: How to get duplicate items from a list using LINQ?

''' <summary>
''' Given a List(Of String), returns a list of items that are duplicated in the list.
''' Each duplicate returned is unique.

[Code].....

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Mar 14, 2012

This is my code and i am getting an error ..Cannot have multiple items selected in a DropDownList. when the page loads it select "ALL" in DDLModality but when i change DDLModality.selectedvalue to any "value" then no error but again when i change to "ALL "getting the error.

onchange of DDLMODALITY submit the form
form1.target = "";
form1.action = "";
form1.submit();

[Code]...

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Dec 22, 2010

Im using Visual Studio 2008 (ASP.net) to build some web pages..

I have a DropDownList linked to a DataSource from data base to fill it automaticly, and it works perfect, but I want to modify the items before its displayed ?

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[Code]...

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Aug 20, 2010

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Dec 7, 2010

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pressing again with same value selected choose another value from DDL and press button

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[Code]...

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[Code]...

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I would like to show different values in a dropdownlist, while editing a gridview, depending on which user is logged in. For example...

The officer would see "Approved by Officer" status.
The director would see "Approved by Director" status

I am trying to add these programatically to a dropdownlist which I have in the edit template of my gridview (approvalsGrid). Here is my code:

Protected Sub ApprovalsGrid_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles ApprovalsGrid.RowUpdating
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[code]....

I do not get any errors. But get an empty dropdown with no items. Am I using the correct event?

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May 15, 2011

I would like to disable a specific items from DropDownList. I have below code but it does not working. So, need someone to told me what I'm doing wrong. DropDownList have 5 items.And, I'm getting error:Index was out of range. Must be non-negative and less than the size of the collection.Parameter name: index

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I have a VB.NET project with XHEO licensing(to license a product) and for that I am using <projetname>.PLSK file which was added to the my solution. When I tried create a new .plsk instead of existing one I got a error while building. The error is like this.
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If Me.IsPostBack Then
If Page.User.Identity.Name = "gate" Then
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Apr 20, 2011

I have a webForm app that registers a user in the database based on the information provided with a web service, auto-generates a random password and username, and e-mails the user a link to take an application based on the marketing company selected. How do I get only the currently logged in user's groups to show up under the MarketingCo_DropDownList. Each user allowed access to the system will have membership in at least one of the marketing groups as defined by the web.config. For example, a user that is currently logged in and belongs to the BIG group under location "algACOMP_user_BIG", will only be able to see BIG in the Marketing Company drop down list. A user that is currently logged in and belongs to the NIS group located under "algACOMP_user_NIS" will only be able to see NIS in the Marketing Company drop down list.

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Tried both insert and add functions, same results both ways.

CODE:

In my xmlMenuStrip component this is the function that removes everything but what follows the seperator. It returns them in a list.

The format of the full window menu is:

CODE:

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I have a program that compiles and works so far, except for the above problem and my alphabetical order (which I can probably figure out on my own:

Public Class danbrockteams
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[Code]....

This works except that my listbox is filled with the team every player is in rather than just listing all possible teams. Not exactly looking for someone to just give me the answer, as I understand things best when figuring them out on my own, so I suppose a hint is what I'm really after.

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