AJAX :: Cascading Dropdownlist Maintain Selected Values?

Jun 10, 2010

I'm wanting to maintain the dropdownlist values that were selected when i use postbackurl with a button. They cascading dropdowns are on a masterpage in an accordion pane. I select the 3 vales in the ddl and then presss a button which redirects to the new content page.

I've been able to get the values using previousPage.master.fincontrol... but am then setting the selectedValue in the page_init of the conent page, but they aren't set when the page loads... does anyone know where to put the code to set the values?

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[Code]....

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I have a web form where I have three dropdowns for Country State And City and there corresponding
ajaxToolkit:CascadingDropDowns.

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The Code is as Follows:

[Code]....

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AJAX :: Cascading Dropdowns After State Is Selected

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I have 3 dropdowns in my VB.Net 3.5 web app. After a user selects a value from the first (let's call it Countries) the second (called States) should populate correspondingly. Dropdown three (cities) should also cascade down after a State is selected. The Countries and States dropdowns have SQL DataSources. The Cities dropdown has to call 2 procs (based on the selected State value) so it does not have a SQLDataSource. My question is, the code below works for Countries and States, however, I cannot ge the Cities to populate...

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</asp:UpdatePanel>
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THIS DOES NOT WORK:

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I am referring to following line from this link [URL] ....

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function scrTrickNameOnChange(ddlId)

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Mar 2, 2011

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[code]....

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I am trying to select some data with dropdown lists which are related.

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[Code]....

For dropdownlist2:

[Code]....

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[Code]....

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I think this needs to be a sticky since this is not solved anywhere that I have been looking... I have been googling this for a while now and came across the answer by shear luck and a simple typo when I was writing the code...

Problem: I have 2 dropdown lists...

ddllist1 and ddlist2... Both are code-behind populated via a sql DB.

they are cascading lists via the ajax control.

I am trying to dynamically populate them with values from a DB for edit reasons.

When I try to get them populated I kept getting the error...

"dropdownlist has a SelectedValue which is invalid because it does not exist in the list of items"

Solution:

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3) set the ID of the first DDL control to cddcontrol1.SelectedValue = id (this is a number)

4) set the value of the DDL to the string value ddlist2.SelectedValue = value (this is a string)

here is the code.

[Code]....

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I would like to populate Cascading DropDownList From SQL Server.

I prepare my project the same way as in this article: [URL] ....

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Below there are my codes:

----SQL DB has two tables:

1.tblUAP (UAP (PK), Start_Date,End_Date)
2.tblGAP(idGAP (PK),GAP,UAP(FK to tblUAP))

 ---project1.aspx

<%@ Page Language="C#" EnableEventValidation="false" AutoEventWireup="true" CodeBehind="Project1.aspx.cs" Inherits="TEST.Project1" %>
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>
....
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</asp:ToolkitScriptManager>

[Code].....

----Services.asmx

using System;
using System.Web;
using System.Web.Services;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

[Code] ....

What else Can I check ??

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AJAX :: Cascading Dropdownlist For To Bind A Country And City

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Now i'm working on the cascading dropdownlist for to bind a country and city, city is based on country dropdownlist. its working well , if city comes more than 8000 records in city dropdownlist , takes more to bind city.

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I really have no idea on this problem on the cascading dropdownlist. I have a cascading dropdownlist that bind with calling the web services.

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my problem is:

when i redirect from other page and passing the Album GUId querystring to this page, it will display all my photo for this album guid. but when i change the album to Select which should be able to display all the Photos, it cannot display out. It only will work is when i choose another album and then go back to Select then it only can work..

[code]....

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at last project i need to deploy cascading dropdownlist without using web serive or cascadingDropDownList Extender

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is there any way to avoid that and to view a wait message until populate the second dropdownlist , i mean is there a sample code for doing that

here is my code

[Code]....

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I have two dropdownlist in cascading working, in my file file.aspx, all work good.the selected values from cascading dropdownlist bind my repeater. when select item inside repeater redirect me to second.aspx. when comeback to first.aspx i lose all selected values in cascading dropddowlist and also values in repeater.

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AJAX :: Trigger Function While Selectedindex Changed In Cascading Dropdownlist

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AJAX :: How To Add Items To Dropdownlist By Calling A Webservice From Javascript Without Using Cascading

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I want to add items to a dropdownlist with values return by a webservice which will be called from javascript without cascading extender...

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AJAX :: How To Use Context Key To Pass Additional Parameters With Cascading DropDownList

May 7, 2015

I have 3 Dropdownlist 

1-DDlcity   2-DDlRegion    3-DDlDistrict

and below is House_info table

district region city Id can
1 Canada
1 Lon
1 London
2 Ita
2 Canada
3

Now when I select city from DDlcity after that select region from DDlregion according to my selected item from DDlcity and DDlregion it bind DDlDistrict... before I used OnselectedIndexChange below is SP...

ALTER procedure [dbo].[SelectِDistrict]
@Region NVARCHAR(30),
@city NVARCHAR(40)

[Code] ....

It worked correctly but now I use cascadingdropdown list 

[WebMethod]
public CascadingDropDownNameValue[] GetDistrict(string knownCategoryValues)
{
string region = CascadingDropDown.ParseKnownCategoryValuesString(knownCategoryValues)["Region"];
string query = string.Format("SELECT District FROM District WHERE Region = N'{0}'", region);

[Code] ....

problem is that when I select city=canada  then region=1 I want it bind in DDldistrict =can  but here it show in DDLdistrict can and Lon

here it just select district that region=1 it doesn't attention to city selected Item I want it do  like SP that I used...

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