VS 2008 How To Populate A Combobox And Then Select A Certain Item On It

Aug 6th, 2009, 06:15 AM

how can i npopulate a combobox and then autoselect an item that corresponds to its primary key. say i populate a combo with a list of occupations from my occupation table. and then for a specific person who has an occupationid as a foreign key in the people table I want to select the related combo value


C# - Cannot Select The ComboBox Item

Sep 14 10 at 8:22

I have two Comboboxes where the second one is dependent upon the first one.

When the SelectedIndexChanged event of the first Combobox fires then the second Combobox will be enabled.

After the event, the second Combobox is enabled but I cannot select the ComboBox item.


I use Dev express Tools

First Combo I load in Page_Load Event

I use Server Side code:

protected void ASPxComboModule_SelectedIndexChanged(object sender, EventArgs e)

There is no problem in loading, but I'm unable to select 2nd combo item.

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Forms Data Controls :: How To Populate A Formview When Select An Item From The Dropdownlist?

Jun 12, 2010 09:26 PM

I have been trying for a while to populate a formview when I select an item from the dropdownlist. The dropdownlist is outside of the formview. For some reason, when I select a different item it does not change in the formview. Only the first item of the list shows up. I don't know where I'm doing wrong. I tried many things and suggested informatioin and I still could not get it to work. When I do try to switch I get this error message:

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:


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AJAX :: Dynamically Populate A ComboBox Through Client-side Javascript?

Jul 29, 2009 11:06 PM

I'm using the ComboBox control from the May 2009 release of the ASP.NET Ajax Control Toolkit.

I'd like to try and populate this ComboBox's list of options dynamically from the client-side Javascript (because I'm retrieving the data from the server based on the user's selection in another drop-down box). how to accomplish this? I tried this:


And it didn't work. The ComboBox just ended up with just one item (the first one) in the list, instead of all of them.

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C# - Add Item To Html Combobox Server Side?

Oct 18 10 at 9:18

How Can I (Or Is It Possible?) Add Item to Html Combobox ServerSide ?Or Bind It in behind Code in asp.net ?Does My question Clear?

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AJAX :: Combobox Not Showing Item List?

Mar 30, 2010 10:59 PM

It was supposed (in sample bellow) to see in browser, when user click button, a list with 4 itens, but I can see only a Blank TextBox and a Button.

What I´m doing wrong?

By the way, I´m using:


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MVC :: DropDownList Can Either Select Item OR Save Selected Item Back To Controller?

Jul 07, 2010 07:22 PM

I have a project that queries a set of times from a database and uses these entries to populate a dropdownlist. Once the page is loaded, the user can select one of the items in the DropDownList. When the "Save" button is clicked, the Selected item value is returned to the [HttpPost] version of the controller action. This item is then stored into session. If the system returns to the page containing the dropdown, I want the saved Value to be selected in the DropDownList. What actually happens is that the DropDownList is always set to be the first item in the list.

Database Table: This data has been imported using Link to SQL


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C# - How To Get The Select Value From A Combobox That Is Bound To A Dataset

Jun 24 10 at 21:05

I want to get the select value from a combobox that is bound to a dataset.For binding the combobox I use:

cboEmployees.DataSource = ds.Tables["employees"];
cboEmployees.ValueMember = "employee_number";
cboEmployees.DisplayMember = "employee_name";
string SelectedValue = cboEmployees.SelectedValue.ToString();

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C# - Select Item In Formview Based On Drop Down Selected Item

Jul 4 10 at 21:41

I am trying to get a drop down and a form view to work together. I've never used form views before. I also am using the entity framework to do everything. This is also my first time with it.

I want to be able to have a drop down, that is populate from the same data source as the form view. So far that works fine.

I then want to be able to change the drop down item, and it change the form view item that is displayed. I cannot figure out how to make this work.

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Web Forms :: Add A New Combobox To Select Another Customer And Repeat As Necessary

Mar 04, 2011 04:01 PM

I have a table to store customers information.

<asp:ComboBox ID="cboCustomers" runat="server"
<asp:Button ID="btnAdd" runat="server" Text="Add Combobox" OnClick="btnAdd_Click"/>

What i'm trying to do is, add a new combobox to select another customer and repeat this as necessary, 2, 3 or more.

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DataSource Controls :: Item In Db.client Select Item?

Dec 22, 2009 10:29 AM

I usually use queries like this:(from item in db.client select item)With this query I use all columns in client. I want to use only 2 of them.

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AJAX :: Combobox Is Seen As Dropdown Not Showing Cursor Selected Item In The List?

Mar 08, 2011 04:18 AM

I have set the Dropdownstyle to DropDown but its still not highlighting the item in the list

<ajaxToolkit:ComboBox ID="cmbstudentid" runat="server"
AppendDataBoundItems="True" AutoPostBack="True"

Font-Names="Tahoma" Font-Size="Small" [code]....

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When Select Any Item From A, The First Item Of A Only Moved To B List Box

Sep 19, 2009 02:17 PM

1. I have two List box A and B put in Update panel

2. I would like to move selected item from A to B on button click event.

3. I followed this code to move A to B

ListItem liFieldName = new ListItem();
liFieldName.Text = lsbA.SelectedItem.Text;

4. My problem is when i select any item from A, The first item of A only moved to B List box.

5. And also How can I remove the selected item?

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VS 2008 Fill Combobox Of Gridview

Aug 15th, 2010, 02:10 AM

<asp:GridView ID="Grdview1" runat="server"
AllowPaging ="false" Width="100%"
<asp:TemplateField HeaderText="Cities">
<ItemTemplate >
<asp:DropDownList ID="cmb1" runat="server" >
<asp:ListItem Value="--Select--" Text="--Select--"></asp:ListItem>
<asp:ListItem Value="Faridabad" Text="Faridabad"></asp:ListItem>
<asp:ListItem Value="Delhi" Text="Delhi"></asp:ListItem>
<asp:TemplateField HeaderText="Addresses">
<ItemTemplate >
<asp:DropDownList ID="cmb2" runat="server" >

I have two comboxes in GridView named cmb1 & cmb2. On selection Changed of cmb1,I want that cmb2 items to be fill from the database.

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AJAX :: Combobox And Enter Key / Want The User To Be Able Type Use Arrow Key To Select Option?

Aug 26, 2010 02:08 PM

I have added a combobox to my page. Listview is updated based on selection from combobox. It is working great except it does not fire when Enter is pressed. User has to click on option from dropdown or has to press tab key to have Listview to populate. I want the user to be able type use arrow key to select option and then press the enter key for event to fire.

Using .net 3.5 and c#

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How To Make A Validation If User Dont Select Data From The Combobox After Selecting A Button

Aug 06, 2010 06:42 AM

How can I make a validation if user dont select data from the combobox after selecting a button then error will be on label.text?

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AJAX :: Implement Live Binding - Purely Imperative Way - Combobox (select Element) Becomes Null

Jul 15, 2010 01:44 PM

I'm trying to implement live binding, purely imperatively . In my example , I have a master view , which is populated using json array. In the detail view ,I'm just setting the value of a prepopulated combo box . But , the moment the bind statement is executed, the combobox (select element) becomes null. This works perfectly when done declaratively. Below is the code for imperative binding. This function is triggered when an item in the masterview is selected.

function execCommand(sender, args) {
// Create dataview for details section
var detailsView = $create(Sys.UI.DataView, null, null, null, $get("div2"));
$get("div2").className = "sys-template";
// bind the dataview to the selected data from the master
var b = Sys.bind(detailsView, "data", sender, "selectedData");
// after the above line of code is executed, the select element with id "myselect" becomes null.
// bind the value attribute of the combo box to the "Description" property of the binded data
var x = Sys.bind($get("myselect"), "sys:value", detailsView.get_data(), "Description");
//hence when the above line of code is executed , nothing happens :( ,i.e the value of the combo box doesn't get set
// alert($get("myselect"));

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="SysObserverSampe.aspx.cs" Inherits="SysObserverSampe" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">>....................................

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How To Get Select Item Name From Html SELECT

Feb 7 at 17:31

Use Html element SELECT in aspx page like:Data is feed by setting its property DataSource:MySelection.DataSource = IEnumerable collection DataSuppose data is stored in table in DB like:

1 - Option A
2 - Option B
3 - Option C
4 - Option D

From MySelection.Value, I can get the ID value, like 1,2,3.From MySelection.Name, I will get "MySelection", not the selected item name like "Option A"How to get the selected item Name?

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AJAX :: No Combobox Control Visible In Visual Studio 2008 Web Project?

Jul 15, 2009 02:38 PM

New user to Visual Studio 2008 - one of the reasons for upgrading from 2005 was because I wanted to use the AJAX Toolbox Control for combobox in my web forms.

Have started a new project, have told it to use .net 3.5 for the project, but when I go to the ajax tooklkit in the toolbox panel there is no combobox. Could someone please tell me why it isn't there?Environment - Visual Studio 2008 SP1

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AJAX :: Combobox Rendering Error In Visual Studio 2008 Design View?

Jan 20, 2010 12:06 PM

i am using the combobox ajax control i in design time i am having an error:

there was an error rendering the control. Request is not available in the context.

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Radiobuttonlist - Select Automatically All The Checkbox Item If The Radiobuttonlist Item Is Checkall

Mar 24, 2009, 02:19

i m using c# asp.net 2.0 i have one form name search.aspx in which i have taken the below radiobuttonlist and checkboxlist. now i want to select automatically all the checkbox item if the radiobuttonlist item is checkall and if the user selects uncheck then it should not select checkbox item. By default i want checkall. how to do this?

<asp:RadioButtonList ID="rdbtnCheck" runat="server" CssClass="fieldtext" ForeColor="IndianRed" RepeatDirection="Horizontal" OnSelectedIndexChanged="rdbtnCheck_SelectedIndexChanged">
<asp:ListItem Selected="True">CheckAll</asp:ListItem>
<asp:ListItem>Uncheck All</asp:ListItem>
<asp:CheckBoxList ID="CheckBoxList1" runat="server" RepeatColumns="3" RepeatDirection="Horizontal"
Width="100%" BorderStyle="Solid" CellPadding="2" CellSpacing="2" CssClass="fieldtext">
<asp:ListItem Selected="True">User Name</asp:ListItem>
<asp:ListItem Selected="True">EmpId</asp:ListItem>
<asp:ListItem Selected="True">Status</asp:ListItem>
<asp:ListItem Selected="True">Priority</asp:ListItem>
<asp:ListItem Selected="True">Ticket Id</asp:ListItem>
<asp:ListItem Selected="True">Severity</asp:ListItem>
<asp:ListItem Selected="True">Group Name</asp:ListItem>
<asp:ListItem Selected="True">Category</asp:ListItem>
<asp:ListItem Selected="True">Subcategory</asp:ListItem>
<asp:ListItem Selected="True">Application</asp:ListItem>
<asp:ListItem Selected="True">Asset No</asp:ListItem>
<asp:ListItem Selected="True">Description</asp:ListItem>
<asp:ListItem Selected="True">Assigned To</asp:ListItem>
<asp:ListItem Selected="True">Resolved By</asp:ListItem>
<asp:ListItem Selected="True">Attachment</asp:ListItem>

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Want To Populate The Sort Select With A Parameter?

May 06, 2009 09:29 AM

am currently styling an xml feed using xsl and would like to include a sort functionality that allows the user to sort by all the different criteria depending on which column header is clicked on. I know how to do the standard sort using <xsl: sort select="" /> but want to populate the sort select with a parameter.I know I will have to do it through javascript and have an onclick function but do not know how to create the parameter and pass it in to the sort.

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AJAX :: Highlighting The Text Of The Selected Item In Ajax Combobox?

Sep 26, 2010 04:12 PM

Is there a way to programmatically select the entire string of the selected item in the AJAX Combobox?What I'm trying to do is bascially on a State/City selection.

1. User selects a State from the first combobox. This triggers the City combobox to be populated. The item(0) is "Select One:".

2. I want the entire "Select One:" to be hightlight as if the user had used their mouse and highlighted all the text.

The reason for this that I'd like the user to be able to start typing the city without needing to clear out the "Select One:" manually.

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JQuery :: Populate And Create A Select List?

Feb 03, 2011 07:33 PM

I am developing an MVC application. As part of the functionality I am using jQuery to invoke a server side Action method. This method returns an array of strings. I would like to display the list of strings in a select list using jQuery. e.g. I would like to see the following html:

<select name="CompleteAddress" onchange="Run()" id="CompleteAddress">
<option>22, Random Address</option>
<option>24, Random Address</option>
<option>26, Random Address</option>

The values "22 Random Address" etc... come from the Action method.

Currently, I am invoking the action method as follows:


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Web Forms :: Allow The User To Choose An Item, But Rather Than Populate Another Drop Down List Control?

Jun 22, 2010 01:25 AM

I've got a drop down list that I want to populate with items from a SQL Server database, which I did successfully, but I can't figure out how to write an if statement that will clear the drop down list based on a selected index and repopulate it with data from another table. The drop down list is inside an update panel that auto posts back.

Basically I want to allow the user to choose an item, but rather than populate another drop down list control, i just want to repopulate the current one with new data.I'm guessing that if I want to get data from more than one table the code below isn't going to work for me. Could I get the data from all the tables at once and store each table data in its own variable until I need to use it? (Each table will have under 10 items, in 5 tables.)

Here is the code to get the data from the database:[Code]....

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AJAX :: Control Toolkit ComboBox SelectedValue / Does The Combobox Has As A Disadvantage That The Text Has To Be Unique

Apr 28, 2010 05:05 PM

I have the following items bound to my combobox:

Value: 1, Text: SNS
Value: 2, Text: ING
Value: 3, Text: ING

Choosing value 1 results in a SelectedValue of 1

Choosing value 2 results in a SelectedValue of 2

Choosing value 3 results in a SelectedValue of 2

does the combobox has as a disadvantage that the Text has to be unique?

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Allow User To Select Row And Populate Textbox With Columns Details

Nov 1 10 at 11:40

Basically, I have a textbox where a user can enter an ID from a database. To make things easier, the user can popup a GridView using a ModalPopupExtender to display all the tables columns, and they can Select a row, which then closes the modalpopupextender and sets the textbox to the row's ID column.

So far I have this:

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
string testing = GridView1.SelectedRow.Cells[1].Text.ToString();
((TextBox)dtlsInsert.FindControl("txtNom")).Text = GridView1.SelectedRow.Cells[1].Text.ToString();

The 'testing' string gets populated, but it doesn't seem to populate the txtNom textbox. Also, how do I close the modalpopupextender programatically?

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AJAX :: ComboBox Input / When leave The Combobox It Adds To The Combox List?

Dec 03, 2010 10:37 AM

I'm try to add a combobox to my form which i have done and populate it with the infomation i need but i want to stop the user from being able to edit the first 5 character in the textbox part of the combo box( 1 is this possible 2 am i going about it in the right way).

I have 3 columns fro a db to enter ips ie 123.456.7.89 at the start if each number i want (SE1)(SE2)(SE3) which i can do at the momment . So I get in the combobox list 3 items with (SE1)123.456.7.89 OR just (SE1) depending of i a result is returned from the DB. However i don't want the user to be able to edit out the (SE?) part of the sting in the textbox. When editing i've tried used the text change event to try and capture the change and make sure the string.length > 5 , but the event does not fire also when i leave the combobox it it adds to the combox list. If I refersh it goes back to how it should be with only the 3 items.

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Forms Data Controls :: Text "SELECT" On The Top Of Combobox With 0 Value?

Jan 27, 2011 07:29 AM

I want the text "SELECT" on the top of combobox with 0 value cbbox.Items.Insert(0, new "SELECT");

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Web Forms :: Display Default Text "--select--" On A Combobox While Loading The Page?

Dec 13, 2010 06:59 AM

how can i display default text "--select--" on a combobox while loading the page?

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DataSource Controls :: Populate Label / Textbox From Dropdownlist In Insert Item Template

Nov 19, 2010 11:09 AM

I've been trying to find a solution to my problem for about 2 days now, and have found nothing. I am new to .net and not really sure how to accomplish this. I have 4 tables in a database, Vendors, RepairCos, Cons, ConRepairHistory. What I'm trying to do is make a page called SendOutForRepair.aspx that has a insert item template where the first control is a dropdownlist that is attached to the Cons table (got this figured out) and is populated with the Serial Number field. I would like the selection from the dropdownlist to populate the 2nd control (VendorID) that is also from the Cons table....

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Forms Data Controls :: Populate Gridview When You Select The Dropdownlist?

Jan 20, 2010 06:44 PM

I am trying to populate a gridview when you select the dropdownlist.selected value. I don't want to use the sqldatasource or any other datasource. I am trying my best to achieve this, but didn't succeed till now. One of my friend said that i need to get the selected value from dropdownlist and search for the data in the database using the selectedvalue and populate the dataset and bind to the gridview.

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Ajax Combobox Not Firing Event When Combobox Is Empty

Jan 3 at 9:45

in aspx i written as follows

<ajaxToolkit:ComboBox ID="cmbAddressAlias" runat="server" DropDownStyle="Simple" AutoCompleteMode="Suggest" CaseSensitive="false" AutoPostBack="true" RenderMode="Inline" Width="170px" CssClass="cmbProvince" OnSelectedIndexChanged="cmbAddressAlias_SelectedIndexChanged"> </ajaxToolkit:ComboBox>

it binding correctly(datasource dynamically binded) and it raises event too while changing index but it is not raising event when we manually clearing the combobox text..if currently combobox having text "ASP" then i manually select that entire text and using del key i am deleting but it is not raising event for me.. when i change index it automatically raising event...i need to raise event while combobox is empty...

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VS 2008 To Populate A Listbox With The Name Of The Reports?

Feb 11th, 2010, 08:43 AM

From the asp.net page, I would like to view the reporting services reports i.e. the .rdl files.I am using a reportviewer to access one of the reports as follows. Notice that I have hardcoded the name of the .rdl report.

Question:There are several reports. The names are stored in a table in the database. Do you know how I can populate a listbox with the names of the reports but do not know how to show the selected report in the viewer. Notice that at present I am hardcoding just one name and not sure how to be able to show the selected report

<rsweb:ReportViewer ID="ReportViewer1" runat="server" ProcessingMode="Remote"
Font-Names="Verdana" Font-Size="8pt" Height="1000px" Width="1000px" >
<ServerReport ReportServerUrl="http://reportserver/reportserver"

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MVC :: Select Item From Dropdownlist

Sep 22, 2010 02:19 PM

I have a dropdown list created via MVCContrib FluentHTML - how do I perform a postback when the user selects any item in the dropdownlist?

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VS 2008 DateADD - Populate Dropdow To Coincide With Companies

Oct 6th, 2010, 10:12 AM

i have the following code to populate a dropdown to coinside with a companies 2008-2010 calander year. This is the output


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VS 2008 / Populate A Textbox I.e Textcode Using The Passed In Value From Page

Feb 2nd, 2010, 07:50 AM

I am being redirected from page1 to page2 as follows:

Response.Redirect(Request.ApplicationPath +
"/page2.aspx?Code=" + searchTextBox.Text);

In page2, I would like to populate a textbox i.e. txtCode using the passed in value from page1.

This is what I am doing:

txtCode.text = Request.QueryString["Code"].ToString();


Lets say I am redirected from page1 to page2 and so the txtCode is populated. Then I press a button to populate a grid based on this txtCode value. So far so good.

Now for my second page, while in page2, I change the value of txtCode and press the button. The code still retrieves the value from querystring which is the previous value and I do not want that.

Do you know how to solve this ?

there is a requiredvalidator control on txtCode which says it has to have a value.

And I do not mind using a session if it is easier to solve this problem.

This is what I have in page2.aspx


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When Select An Item, Other Get Automatically Selected

Oct 30th, 2009, 11:59 AM

<asp:ListBox ID="ListBox1" runat="server" SelectionMode ="Multiple" >
<asp:ListItem Value="1">A</asp:ListItem>
<asp:ListItem Value="2">B</asp:ListItem>
<asp:ListItem Value="2">C</asp:ListItem>

I select item C,when i click on button,B is selected automatically.y??When i select items B and C,when i click on button,only B is selected???Y???

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Select Last Item In Dropdown List

Jul 24, 2009 04:01 PM

I have a fairly simple question. I have a drop down list that is populated by a table in my sql database. I want to be able to go to the last record or item in the table and add one to the selected value, then insert that information in a textbox. Getting the selected value is easy, I just don't know how to automatically get the very last record. Since the drop down list is linked to the database, the number of items in the list changes almost daily.

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Set An Event On Item Select CheckboxList?

Nov 17 10 at 20:36

How to fire an event based on selected item in Checkboxlist (ASP.net 3.5), the OnSelectedIndexChanged in Checkboxlist returns a list of all the selected items, where I need to know just the current selected item.

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