VS 2005 - Populating Dropdownlist Using Code Behind?

Jan 11, 2012

How I populate a dropdownlist from code behind. I want to add the items from an access database. I know how to read the rows but don't know how I add them to the dropdownlist. What I mean by this is I need to add a value column and a display column because I want to save the code value not the display value.

Is this possible and if so how do you do it?

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Populating Manually A Dropdownlist From Code-behind?

Sep 21, 2014

I have code that populates 2 dropdownlist in a gridview. DropStart And DropEnd I want to add time values depending on a few things here's the routine I cal.

Code:

Public Sub GenerateTime(RowIndex As Integer)
Dim ComboStart As New DropDownList
Dim ComboEnd As New DropDownList
Dim ItemList As ListItem
Dim TimeInterval As Integer
Dim IntervalleCalcul As Integer
Dim NombreIntervalles As Integer

[code]....

now this code is called, and runs fine, it goes in the for loop and I see if I trace it that combostart and comboend both have 96 Items in them as expected. hence it did find the controls in the gridview. but when I exit this sub and continue the code by just running the code in the asp.net page the two corresponding dropdown control don't get the values that did get added in the code behind.

In the RowEditing is when I call this routine.

Code:

Private Sub GridDetails_RowEditing(sender As Object, e As System.Web.UI.WebControls.GridViewEditEventArgs) Handles GridDetails.RowEditing

GridDetails.EditIndex = e.NewEditIndex
GridDetails.DataBind()
GenerateTime(GridDetails.EditIndex)
End Sub

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Oct 25, 2010

On my formview I have a drop down list that is populated with the names of the files in a certain directory. This works fine, but when the drop down list selected value is bound to the database field I get the following error :

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I have setup other drop down lists in the same formview populated from SqlDataSources and these all work fine. I can see perhaps why this is an issue because I have not specified a DataValueField or a DataTextField for this drop down that is populated in code (whereas I can for the SQL bound ones) because I'm not sure what these settings would be.

I need to have a "blank" option as well so that the field does not default to the first value in the list.

My code (I have stripped out some meaningless controls) :

[Code]....

My code behind populating the ddl :

[Code]....

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Jan 19, 2010

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Jan 19, 2010

I am getting a problem while working with the Dropdownlist in VS2008. I am trying to populate the DDL using c# codding instead of creating DataSource in GUI. The DDL is getting populated as expected, but then I've added a label that will show the current selected item; for this I've written a code in DropDownList1_SelectedIndexChanged() :

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I hae also enable AutoPostback for the DDL.
I have placed the PopulateDDL() method inside of the Page_Load();
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MVC :: Populating Dropdownlist From Different Collection?

Mar 23, 2011

I'm new to MVC pattern and I have a question regarding to a dropdownlist. Actually My Data came from a collection (random string) then it displays it in a list. And yes it display, so I add a dropdownlist. And I can populate it using the same collection. My question is how can I populate the dropdownlist from different collection?

Here's my View

[Code]....

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C# - DropDownList Not Populating With Correct Value In MVC?

Feb 22, 2011

so I am having an issue getting a drop down list to choose the right value when it renders. It always defaults to index zero. However, I do have a view in another place where it renders just fine and selects the right value. I don't understand the difference.

Here is a trimmed down version of the view that works correctly:

@model AppName.Models.Guest
@using (Html.BeginForm())
{
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{
{"No Answer", "No Answer"},

[Code]....

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Web Forms :: Populating DropDownList From Database?

Sep 18, 2010

I'm really struggling with this tonight (this being exactly what it says on the tin, (or the subject!)).

Code I'm working with right now is:

[Code]....

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MVC :: Populating Items In A DropDownList From The Model

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Using MVC2, I want to know how you add the options of a dropdownlist from a database. I have several lookup lists so I will need to do this many times. I'm stuck on part 5 of the MusicStore (which is using MVC3) at this part

[Code]....

Alternatively if someone could recommend an MVC2 tutorial which covers drop lists.

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Feb 1, 2010

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Here is the code from a datagrid edit command in which I am attempting to populate a DropDownList in the EditTemplate from the database. The result is only one item (the first) from the database, instead of all items.

[Code]....

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Web Forms :: Populating Dropdownlist From Session Variable?

Nov 3, 2010

To speed things up for the visitor of my web page, I put a personalised dropdownlist in a session variable (as below).

The idea is that if the user is logged in and the ddl session variable is Nothing then it should be set here, and the next times the dropdownlist should be set from this session variable.

The session seems to be populated ok, but the resulting dropdownlist (ddlMenu) doesn't (it just becomes blank). I suspect that it has soemething to do with the way I try to assign it. No matter what I try I run into problems, saying that one thing is a one-dimensional array and the other thing a listitemcollection, or the like. What should I write in the last line?

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Apr 30, 2010

I am trying to populate (store) an access database with the information from a DropDownList.

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I have provided the code that populates the database from the TextBox's

[Code]....

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i have 2 tables Desgn & EmpForm

Desgn table is lik this

CREATE TABLE [dbo].[Desgn](
[DesignationCode] [int] IDENTITY(1,1) NOT NULL,
[DesignationName] [varchar](50) NOT NULL,
CONSTRAINT [PK_Desgn] PRIMARY KEY CLUSTERED

[Code]....

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Aug 30, 2010

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i am working on an availability / booking system, one element in the form will be a dropdownlist control with a selection of date ranges for a customer to select the period they want to book.these will be a list of ranges for each week (monday - sunday)eg

27th Sep - 3rd Oct 2010
4th Oct - 10th Oct 2010
11th Oct - 17th Oct 2010

etc

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Forms Data Controls :: Populating A Dropdownlist In A Gridview?

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Here is a snippet of my code...

<ItemTemplate>
<asp:LinkButton
ID="lbEdit"
runat="server"
CommandName="Edit"
>Edit</asp:LinkButton>
<asp:LinkButton
ID="lbNew"
runat="server"
onclick="lbNew_Click"
CommandName="New">New</asp:LinkButton>
</ItemTemplate>

Code behind...

Protected Sub gvPunches_RowEditing(ByVal sender
As
Object,
ByVal e
As System.Web.UI.WebControls.GridViewEditEventArgs)
Handles gvPunches.RowEditing
Dim i
As
Integer = e.NewEditIndex()
Dim ddl
As DropDownList =
CType(gvPunches.Rows(i).FindControl("ddlDiv"), DropDownList)

the question I have is when i enter this procedure in the code behind, ddl is nothing. what am I doing wrong in populating the dropdown for the row I am editing?

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<dates>
<date month="1"/>
<date month="2"/>[code]....

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z'm trying to create a webpage for ticket purchases. When selects an option from a dropdown list and clicks a button, I want them to be taken to the next page where a textbox will be auto-populated with their choice from the dropdown list. For some reason, I can't figure out how to get them to communicate. On Form1 I can get Form2 to open onclick but for some reason, when I put code into pageload for Form2 to pull data from Form1, it won't work. For example, on Form2 I would put the following code under pageload: textbox1.text = Form1.textbox2.text

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Jan 19, 2010

I have the following ListView (extra code removed for clarity) :

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<EditItemTemplate>
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<InsertItemTemplate>
<asp:DropDownList ID="ddlCountry" runat="server" SelectedValue='<%# Eval("Country") %>'
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</InsertItemTemplate>
</asp:ListView>

The Insert row in the ListView has an empty DropDownList and GetCountries() is not called. However, if I click the Edit button on an existing row, GetCountries() is called twice (not sure why) and the DropDownList is properly populated. Why isn't the InsertItemTemplate DropDownList getting populated?

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1. textbox (Search for staff)
2. Dropdownlist( Search for department)
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[Code]....

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