AJAX :: How To Update Listbox Based On Dropdown Value

Mar 15, 2010

I have country dropdown, now on change of its index i need to populate items in listbox (not in the dropdown).

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AJAX :: How To Update Listbox Based On Dropdown Value / Unable To Use Cascadingdropdown

Mar 15, 2010

i have a religion dropdown1 , on this selectedindexchange i have to populate castes into the listbox(not dropdownlist).

i am unable to use cascadingdropdown as it is tightly binded with dropdowns.

please guide me how do i update listbox items based on the dropdown selected value using ajax.

i tried with pagemethods getting the dictionary object using JS function and thought of binding it.

but i am unable to bind the list.

//html code
<asp:DropDownList ID="ddlReligion_RS" runat="server" TabIndex="6" onchange="GetCastes_RS(this.value);">
<br />
<asp:ListBox SelectionMode="Multiple" ID="lstBxCst_RS" runat="server">
//js function
function GetCastes_RS(relgnID)
function (resp)
var ddlCaste= document.getElementById("<%=lstBxCaste_RS.ClientID%>");
var castesList = resp;
alert (resp);
if(castesList.keys.length >0)
for(var i=0 ;i< castesList.keys.length;i++)
ddlCaste.options[ddlCaste.length]=new Option(castesList.values[i],op);

i could call the webmethod, but i am getting this error in javascript.

Type 'System.Collections.Generic.Dictionary`2[[System.Int32, mscorlib, Version=, Culture=neutral,
PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=, Culture=neutral,
PublicKeyToken=b77a5c561934e089]]' is not supported for serialization/deserialization of a dictionary, keys must be strings or objects.

when gone thru few links i have seen few examples supporting dictionary object , why not in my case?

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Web Forms :: Dropdown To Exclude Or Disable List Items Based On Listbox Selections?

Mar 12, 2010

I have a drop down that lists all our 40+ locations.. I then have a list box with all our locations as well. The client is presented with the question which locations have you worked at before. If they pick say 3 locations, i need to remove or disable those 3 from the drop down. I have other code for creating a drop down, but not sure where to go with this.

Here is my code for the controls and code behind:


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AJAX :: Displaying Listbox Like Dropdown?

Apr 5, 2010

I have created one multiselect drop using listbox.Its working fine.I used this multiselect dropdown in content page .The content page is too small to show the entire dropdown items.Need to scroll the content page to see all items.So i need to show the entire listbox item.or need to display the listbox like dropdown extender in Ajax.I am using asp.net 2.0

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DataSource Controls :: Auto-populated Listbox Based On Selection From Other Listbox?

Feb 22, 2011

I'm trying to auto-populate a listbox of zip codes from a database table state_zipcode_plans based on the state a user selects from the previous listbox. I'm getting the error: Must declare the scalar variable @state_code.


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AJAX :: Update One UserControl Based On Other Using Update Panel

May 7, 2015

I am working in asp.net 4.5 with VS2013. I have two usercontrols in my aspx page and in my first usercontrol i have gridview with button inside update panel  and if i press the button it should pass the value to second userconrol and based on the value i will do some db operation to bind the controls in second usercontrol.

I am wondering is it possible to achieve using AJAX? I need to do this with partial postback without posting entire content of the page.

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AJAX :: Update Listbox In Updatepanel On Click Of Hyperlink?

Jan 11, 2011

what im tryign to do is, onclick of a hyperlink, update a list box inside an update panel

im guessing you can tell i have no idea what im doing by the code below, i dont even know how to assign names and values to the listbox via c# i was just mashing together test code


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Load Grid Based On The Dropdown Value Selected Using Ajax?

May 7, 2010

I have four cascading dropdown control and now I want to load a gird data based on the value selected on that dropdown. This should be done by using ajax concepts..

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Forms Data Controls :: ListBox, Array List / Update The Listbox Content?

Mar 26, 2011

I am designing a program that will let me enter the name of an item to swap and adds the swap to an array list when a button Add is pressed. Once the item is added to the array list a Sub Procedure should be called which displays the contents of the array list in a list box.

The system will also allow me to remove items from the array list using a Remove button

followed by updating array list.

I have done some part which puts item into the listbox1 which i named lstSwapList.I would need some assistance on the Sub Procedure to display the Value or Description on the other listbox2 which i have also named lstContent,if a value is selected from the listbox1.

I would also want to know how to update the Listbox content,However i hv added a sample of the way i guess it may be.

Any complete solution from anybody on the Sub Procedure and the Update Swap procedure will be greately appreciated.

&#65279;The script below is what i have done so far.

Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub lstContent_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles lstContent.SelectedIndexChanged
End Sub
Protected Sub lstSwapList_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles lstSwapList.SelectedIndexChanged
End Sub
Protected Sub btnAddSwap_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAddSwap.Click
Dim SwapValue As String = "Sixty Pounds"
Dim Counter As Integer = 8
Dim SwapN0 As Integer
lstSwapList.Items.Add(New ListItem("300", "1"))
lstSwapList.Items.Add(New ListItem("ASP.Net", "2"))
lstSwapList.Items.Add(New ListItem("Programming", "3"))
SwapN0 = lstSwapList.SelectedValue
For Counter = 0 To -1
SwapN0 = lstContent.Items.Count
End Sub
Protected Sub btnDeleteSwap_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDeleteSwap.Click
End Sub
Protected Sub btnUpdateSwap_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpdateSwap.Click
End Sub
End Class

Sub UpdateSwap(ByVal valueA As String, ByVal ValueBAs String, ByVal ValueC As Integer, ByVal ValueD As Date)

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AJAX :: Update Panel Deselect The Current Selection In A Listbox When Selecting Another?

Apr 4, 2010

I have a asp:ListBox wrapped inside an asp:UpdatePanel. The list box contains Bus Codes. If I select AH, for example, and then scroll down to select XY, the listbox jumps back up to the top of the list instead of staying on XY. Listbox's autopost back is set to True. As I need to get selected values and then pass it to another web page to display a crystal report. The report web page is opened using JavaScript Window.Open and on page load of the web page that contains the listbox this JavaScript is added to a button. Is there a way I can stop my list box jumping back to the 1st item?

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AJAX :: Open Modelpopup Window Based On Value Selected In Dropdown List?

May 27, 2010

Is there a way to open modelpopup window based on value seleted in dropdown list? I want to open a window when Urgent is selected in the dropdown list=!!!!

here is the code for ModalPopupExtender:

<ajaxToolkit:ModalPopupExtender ID="ModalPopupExtender1" runat="server"


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Forms Data Controls :: Gridview Populate Dropdown Based On Another Dropdown?

Mar 4, 2011

I have a gridview where i have two fields. one is product and second is sub category.

I need to do 2 things.

1. I need to populate the two combos from the database. But depending what is selected in dropdown 1 this will determine what needs to be populated in drop down 2?

how can i achieve this?

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JQGrid Inline Editing - Filter Subcategory Dropdown List Based On Another Category Dropdown

Jul 9, 2010

I have a category and a subcategory column in a Jqgrid. I have enabled inline editing, both category and subcategory are dropdownlists columns (edittype:'select'). I need to filter the subcategory list based on the selected category. I wonder how can I acheive this functionlity? I tried the below event but its not working for me

afterEditCell: function(rowid, celname, value, iRow, iCol) {
//to do here

the above event doesn't get fired. my all column are editable

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Web Forms :: Populating A Dropdown Box With Contents Based On The Selection Of Another Dropdown Box

Sep 16, 2010

I am a complete newcomer to ASP.NET. However in the few weeks I have been playing with it I have got pretty far and have mastered things like stored procedures, gridviews, formviews and templates.I have a dropdown box which is populated from SQLDataSource1

I have a second dropdown box which is populated from SQLDataSource2, but i need the query feeding this to be dependent on what was selected in the first dropdown box. I assumed it would simply be a case of modifying the select statement on SQLDataSource2 using the SelectedIndexChanged event on the first DropDownList to update the second SQL source, but I cannot work out for the life of me how to do it. Pretty much all of the code I have is ASP.

can i do this purely in ASP rather than using VB behind the scenes or do I need to use VB? I am pretty comfortable with vb.net but one of the other issues I have is referencing an ASP object from VB... so for instance if I had a text box in ASP, how can I read or change the properties of this object from VB?

FYI I am using Visual Studio 2010 and SQL/Server

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AJAX :: Using Update Panel On A Repeater Using Dropdown Autopostback?

Mar 18, 2010

The subject is explanatory, but here are some details:

I want to update a repeater when SelectedIndex value changes for a dropdown list. The problem is Nothing happens.

My aspx page is present in a nested master page. and neither autopostback works nor update panel. i have set the AsyncPostBack trigger on SelectedIndexChange event.

Please let me know what am i doing wrong or what am i missing.

PS: I have never worked on ajax before so I might have overlooked something.

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MVC :: How To Populate A Dropdown Box Based On Selectedvalue In Another Dropdown/combo Box

Oct 22, 2010

how to populate a dropdown list box based on selected value in another.

dropdown list box? Say, for example, the first dropdown is a list of car manufactures. When a user selected a manufacture from that dropdown list, the second dropdown would list would automatically gets populated with all the car models for that manufacture.

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Ajax Update Panel Refresh And Dropdown Behaviour In Firefox

Sep 30, 2010

I have found an odd bug in my application. I have a dropdown status which is bound to my gridview. On selecting a status from the dropdown the selectedindex then fires and binds the results to the gridview.Now the strange behaviour in firefox and not IE:If I have a dropdown open and an ajax update fires on my gridview the option is selected from the dropdown (just by hovering my mouse over it rather than selecting it) and the results bound to the gridview. This does not happen in ie as you should have to physically select an item from the dropdown rather than firefox selecting it for you because you happened to hover over an option when the update event fires.

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Web Forms :: DropDown Populated From Db Based On Value Of Other Dropdown

Mar 16, 2011

I have dropdown1 that has some items in it.I also have dropdown2 that gets populated from a database based on whatever is selected from dropdown1.Dropdown2 has its first item as "Make Selection" and then appends the data from the db based on what was selected in dropdown1.

Now when I select an item from dropdown1 it puts the correct data in dropdown2 but as soon as I select another item from dropdown1 it appends those values into dropdown2. How can I remove the values from dropdown2 after a new item is selected from dropdown1?

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MVC :: Load Dropdown Based On Selection Of Other Dropdown?

Jan 9, 2011

I am new to MVC, I have a form in which selection of one dropdown should reload another dropdown. On selection of the dropdown, I use a jquery post to get the data and my viewstate is reloaded with new data, but I am not sure how to set the newly loaded viewdata to load the dropdown again.

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AJAX :: Using Cascading Dropdown / Model Popup And Update Panel In Page?

Mar 13, 2010

I am using cascading dropdown, model popup and update panel in my page.

my all drop down are in update panel. now i am retrieving values from the database through data reader and assign value of respective data to the respective control. but control (drop down list) shows "--select--" and not the retrieve value i.e. "Hospital"

Following is the code:


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Add Record Via Jquery Ajax Call To Webmethod And Update Dropdown List

Jan 26, 2010

i manage to add recrod via jquery ajax call to webmethod but i want to update the dropdown list once the record is been added. i dont want to use update panel. what would be the best way of doing that.

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[Method Error 500] In Cascading Dropdown Update In Ajax Control Toolkit

Apr 16, 2010

I am getting [MethodError 500] when I use cascading drop down. below is my code

<td >
Select a Hoster:
<asp:DropDownList ID="ddlFeaturedHoster" runat="server" ></asp:DropDownList>
<ajaxToolkit:CascadingDropDown ID="cddHoster" runat="server" TargetControlID="ddlFeaturedHoster"
PromptText="Select a Hoster" LoadingText="Loading ..." Category="ActiveHoster"
ServiceMethod="GetDropDownContents" ServicePath="~/Hosting/HostingService.asmx"/>
Service Code:
public CascadingDropDownNameValue[] GetActiveHosters()
List<CascadingDropDownNameValue> returnList = new List<CascadingDropDownNameValue>();
HostersManager hosterManager = new HostersManager();
List<Hosters_HostingProviderDetail> hosters = hosterManager.GetAllHosters();
returnList.Add(new CascadingDropDownNameValue("--Please Select One--","0",true));
foreach (Hosters_HostingProviderDetail item in hosters)
returnList.Add(new CascadingDropDownNameValue() { name=item.HostingProviderName, value= item.HosterID.ToString()});
return returnList.ToArray() ;
public CascadingDropDownNameValue[] GetDropDownContents(string knownCategoryValues, string category)
knownCategoryValues = FormatCategoryWord(knownCategoryValues);
List<CascadingDropDownNameValue> values = new List<CascadingDropDownNameValue>();
HostersManager hosterManager = new HostersManager();
switch (category)
case "ActiveHoster":
case "ActiveOffer":
return values.ToArray<CascadingDropDownNameValue>();
/// <summary>
/// Formats the category word
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
private string FormatCategoryWord(string value)
if (string.IsNullOrEmpty(value)) return value;
if (value.LastIndexOf(":") > 0) value = value.Substring(value.LastIndexOf(":") + 1);
if (value.LastIndexOf(";") > 0) value = value.Substring(0, value.LastIndexOf(";"));
return value;

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AJAX :: Display Cascading Dropdown List Based On Checkbox List Selected Value

Nov 10, 2010

How can i generate dropdown lists based on what has been selected in the checckbox list. Below is an example of what i need. if the user selects the options day, lotID and waferID, then 3 cascading dropdown lists should be displayed. And then a gridview displays data based on what has been chosen in the dropdown lists.


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AJAX :: Update Pannel Is Not Updating The Controls On Dropdown Click In Aspx With Master Pages

Feb 12, 2010

the below code is in ASPX page and that page is using master pages and the update panel is not updating the controls ..

.it is working fine in normal ASPX page with out master pages.

Lables are populating from database

<asp:Content ID="CphPageContent" ContentPlaceHolderID="CphPageContent" Runat="Server">
<asp:ScriptManager ID="smSubmitReqOne" runat="server" />
<td>Application Requester:<span>*</span></td>
<td><asp:DropDownList ID="drpApplnRequester" runat="server" AutoPostBack="true" OnSelectedIndexChanged="drpdrpApplnRequester_SelectedIndexChange">
<asp:ListItem Value="0" Text="Select"></asp:ListItem>
<asp:RequiredFieldValidator ID="rfvApplnRequester" runat="server" InitialValue="0" Display=None ControlToValidate="drpApplnRequester" ErrorMessage="Select the Application Requester" Visible=true ValidationGroup="vgSubmitRequestOne"></asp:RequiredFieldValidator>
<a href="AddApplnRequester.aspx" target="name"
onclick="modalWinRequester(); ">Add Application
<asp:UpdatePanel ID="upApplnReqOwner" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="true">
Application Requester E-mail:
<asp:Label ID="lblApplnReqEmail" runat="server" Text=""></asp:Label>
Application Requester Phone: </td>
<asp:Label ID="lblApplnreqPhone" runat="server" Text=""></asp:Label>
<Triggers >
<asp:AsyncPostBackTrigger ControlID="drpApplnRequester" EventName="SelectedIndexChanged" />
protected void drpdrpApplnRequester_SelectedIndexChange(object sender, EventArgs e)
GPS.BusinessObjects.Users UserInfoRequester = new GPS.BusinessObjects.Users();
if (drpApplnRequester.SelectedValue.ToString() != "SELECT" && drpApplnRequester.SelectedValue.ToString() != "")
GPS.BusinessLogic.Users objUsers = new GPS.BusinessLogic.Users();
UserInfoRequester = objUsers.GetUserInfoByUserID(drpApplnRequester.SelectedValue.ToString());
lblApplnreqPhone.Text = UserInfoRequester.PhoneNumber;
lblApplnReqEmail.Text = UserInfoRequester.EmailId;
{ lblApplnreqPhone.Text = "";
lblApplnOwnerEmail.Text = "";

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Populate Dropdown Listbox Using A Web Service?

Nov 15, 2010

how to populate a drop down listbox (dlName) from a web service with last and first name i.e. (LastName, FirstName). My Web Service XML that I am requesting is as follows:

<?xml version="1.0" encoding="utf-16"?>
<FindPartnerContactsAction xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">


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