AJAX :: Cascading DropDownlist / Autopostback To Get The Value Of The Album GUId
Sep 4, 2010
I really have no idea on this problem on the cascading dropdownlist. I have a cascading dropdownlist that bind with calling the web services.
I wan to do a autopostback to get the value of the Album GUId so that i can query out all the photo list of that album. it is working well if my page without the AlbumGUId query string.
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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Oct 7, 2010
I have the following code:
.aspx
<asp:DropDownList ID="ddlCountries" AutoPostBack="true" runat="server">
</asp:DropDownList>
[code]...
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Aug 20, 2010
I have a Cascading drop down list that is working fine to load the correct lists however I would like to have the last one initiate a query and display a datagrid on the same page containing the results of the query. Without Ajax involved this seems rather easy by using autopostback on the drop downs. If I could do it through Ajax that would be great but I can settle with having the page to reload to display the data. Right now I'm not sure how to do either. I enabled autopostback on the last drop down and wrote a method for it but I get an error at runtime saying:
Invalid postback or callback argument
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Aug 31, 2013
I am referring to following line from this link [URL] ....
data 'continentId ' 'ddlContinents.ClientID'.val ''
In your code. i tried using this code and facing a tiny problem. In above mentioned code 'ddlContinents.ClientID'.val stores integer value in contentId for obvious reasons but the requirement of my code is different. i want to pass text which is selected instead of id no.for example if mumbai is listed as second option and i select mumbai it should store mumbai in contentId instead of 2 i.e. integer value.
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Mar 2, 2011
I am trying to get two cascading dropdownlist to work but cannot get either to populate. How do I de-bug this? I'm not getting any errors, just blank dropdowns.
I've been trying to fill in webservice from SQL Server. But in-case this was the problem. I found an example on this site to fill with test values, but this still does not work. Since I cannot even get first to populate, to simplify I'm just giving code for first dropdown and its function(s)
[code]....
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Jan 20, 2011
I am trying to select some data with dropdown lists which are related.
I select one of selection in dropdownlist1. After that, when my page reloads, dropdownlist2 is filled with table name which i am trying to get data from. (TBLYETKILI)
My code is below..
For dropdownlist1:
[Code]....
For dropdownlist2:
[Code]....
Also I am calling these functions as follows:
[Code]....
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May 20, 2010
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:
1) get the values from the DB or from where ever...
2) create a sql select to get the values from the ddl db
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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Sep 24, 2013
I would like to populate Cascading DropDownList From SQL Server.
I prepare my project the same way as in this article: [URL] ....
But all the time I have "Method error 500" I read many articles how to solve this issue but without success.
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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Apr 12, 2010
I am dealing with a problem that i have to make decision based on the number of items in a cascading dropdownlist. unfortunately this ajax toolkit control does not expose a Items collection.how do i count the number of items in this control ?
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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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Nov 12, 2010
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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Mar 21, 2011
I'd like to set the selected value of cascading dropdownlist by reading from a Textbox.Text value when the dropdownlist has been populated, is this possible?
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Jun 16, 2010
at last project i need to deploy cascading dropdownlist without using web serive or cascadingDropDownList Extender
i try to do this using updatepanel :D this work , but at many times that apear my computer and my internet Explorer as busy and hang and i can not do any thing untill populate the second dropdownlist :(
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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May 7, 2015
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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Jan 2, 2010
i can populate cascading dropdownlist by using webservice now. but may i know how do i trigger function while selectedindex changed? (without using auto postback...)
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Feb 26, 2010
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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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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Aug 24, 2010
I wan to do a required field validation for the cascading dropdownlist . When my page first load out the validator is fired first in the google chrome, the callout extender message is prompt out first in the Google Chrome. I have tested the code in IE and safari, this two browsers never prompt out the validator callout first when the page is loaded.
i wonder why the google chrome will prompt out the validator when i validate the cascading dropdownlist. I have did some research on it, but failed to get any solution.
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Sep 10, 2010
Have spent hours trying to create a Dynamic Data Field Template holding a DropDownList which is extended by the AJAX Cascading DropDown extension.Final form holds multiple cascading dropdown boxes. User selects Country (Land) then Postcodes, Counties (Provincie) are populated. Once postcode is selected then towns (Plaats) are populated. The problem I am now facing is that the viewstate for the dropdown lists is not being saved/restored after an insert action or custom validation error. So basically the dropdown lists are being reset to their default values.Some code (if missing parts, just ask and I will post them) - Don't mind the code structures etc... needs some refactoring :)Attribute I created:
[Code]....
KlantMetaData (=> Klant is Dutch for Customer ):
[Code]....
DynamicDropDownList Control I created:
[Code]....
Dynamic FieldTemplate created for inserts:
[Code]....
EntityTemplate I created:
[Code]....
Webservice methods created:
[Code]....
Code in masterpage:
[Code]....
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May 13, 2010
IAm using ASP.NET Ajax.
Iam having a Update Panel with DropDownList with AutoPostBack="True"
I dont want to postback it, but it going postback, i dont want AutoPostBack="false"
.
Here my code:
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering ="true" >
</asp:ScriptManager>
<br />
<br />
<div>
</div>
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack ="true" OnSelectedIndexChanged ="DropDownList1_SelectedIndexChanged" >
<asp:ListItem Value="0">----Select----</asp:ListItem>
<asp:ListItem Value="101">General Admin</asp:ListItem>
<asp:ListItem Value="102">Admin Assistant</asp:ListItem>
<asp:ListItem Value="103">Software</asp:ListItem>
<asp:ListItem Value="104">Recruiting</asp:ListItem>
</asp:DropDownList>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode ="Conditional" >
<ContentTemplate >
<asp:DropDownList
ID="DropDownList2" runat="server">
<asp:ListItem Value="0">----Select----</asp:ListItem>
<asp:ListItem></asp:ListItem>
</asp:DropDownList>
</ContentTemplate>
<Triggers >
<asp:AsyncPostBackTrigger ControlID ="DropDownList1" EventName ="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
</form>
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Jan 8, 2013
I am having two dropdownlist in my project,one dropdownlist for empid, another dropdownlist for month, if the user select the empid, the values are retrieved in the textbox.
In the second dropdownlist, if the user select the month in the dropdownlist it will display the leave details, its all working fine, if the user again select the first dropdownlist that means empid, I want to show the second dropdownlist as select month, how can do this.....
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Aug 12, 2012
i have 3 drop down list in my page
1-ddlzone1
2-ddldistrict1
3-ddlstore1
this is ddlzone1 code
protected void DDLzone1_SelectedIndexChanged(object sender, EventArgs e) {
DDLstore1.Items.Clear();
DDLstore1.Items.Add(new ListItem("select center", ""));
DDLstore1.AppendDataBoundItems = true;
SqlCommand _cmd = new SqlCommand("selectcenter", _cn);
[CODE].....
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Sep 29, 2010
I am still new to ASP.net and it has been some time since i worked with code in general, so please forgive me for sounding stupid. I am using SQL to populate several drop down lists in a form, and later using the values selected to populate a datagrid. My issue is that the value i am trying to assign is a GUID in the database. So when I:
Do While (reader.Read())
Dim newListItem
As
New ListItem()Loop
newListItem.Value = reader.GetGuid(0)
newListItem.Text = reader.GetString(1)
Stat.Items.Add(newListItem)
I get an error stating :"Value of type 'System.Guid' cannot be converted to 'String'". My solution to this was to change "newListItem.Value = reader.GetGuid(0)" to
newListItem.Value = reader.GetGuid(0).ToString
that worked to generate the drop downs which was great, but now i am trying to use that value in a sql statement to populate a listbox and since the value is now a string, i cannot use it in my where clause to against a GUID field in the database. I would prefer to not have to convert the GUID in the first place, but have no idea how i could keep it in that format for my drop down list, and if that is not possible how can i convert the data back to GUID from String?
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Sep 18, 2010
I am making an application that deals with vehicles. I need two DropDownLists:
Makes: All Vehicle Makes
Models: Models that belong to the selected value of the Make DropDownList
How is this done in MVC2? My Idea: Do I use an ajax call when my first list is selected and then pull back the Models to bind to the Model DDL? How would model binding come into play that way? UPDATE I posted what I ended up doing as an answer. It is super simple and works great. You can use a get too if you feel so inclined, but you have to specify that you want to like so... return Json(citiesList, JsonRequestBehavior.AllowGet);
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Jan 25, 2011
I have a code like this
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
string strConnectionString = ConfigurationManager.ConnectionStrings["SqlServerCstr"].ConnectionString;
SqlConnection myConnection = new SqlConnection(strConnectionString);
myConnection.Open();
string musisim = DropDownList1.SelectedItem.Value;
SqlCommand cmd = new SqlCommand("select B.HESAP_NO FROM YAZ..MARDATA.S_TEKLIF B WHERE B.MUS_K_ISIM = DropDownList1.SelectedItem.Value", myConnection);
Label1.Text = cmd.ExecuteReader().ToString();
myConnection.Close();
i have a customer name as "MUS_K_ISIM" and his number as "HESAP_NO" All i want is, (autopostback is true) automaticly getting label "HESAP_NO" with who has this number "MUS_K_ISIM" in Dropdownlist. How can i do that? Error: Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
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