AJAX :: Create CascadingDropdown Control Dynamically?
Mar 4, 2011I create my aspx page dynamically, with adding controls to a placeholder.
But this way the ajax cascadingdropdown won't work.
I create my aspx page dynamically, with adding controls to a placeholder.
But this way the ajax cascadingdropdown won't work.
I have taken 3 drop down controls and extends cascadingdropdown control to them. They work finely and show values properly. But, I want to store these valuse in sql database. I tried as we do for dropdownlist by using DropdownList1.selectedItem.ToString().
but it is showing error. It is accepting all other input values passed through text boxes, radio buttons and even combo box of ajax. So actually what should I write to take values from cascadingdropdownlist?
I got stuck in the following problem. I am using cascadingdropdown ajax control and binding data into dropdownlist from database. I have done to display the data from database. Now I want to display the data, which is related to the item which I selected from dropdownlist, to 'Label'. ex) I have a following table in database.If I select '2' from the dropdownlist, I want to display 'Taro' to the label. If '1' from the dropdownlist, 'Ken' to the label. ID name 1 Ken 2 Taro I changed 'AutoPostback' property of dropdownlist to TRUE,then when I run the page and select the item from dropdownlist, error occured. Error messege is as belows. Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: Invalid postback or callback argument. Event validation is enabled using in configuration or in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. If there is another way to display the item into a label without postback, or someone knows how to sort out this problem,
View 2 RepliesHow to create a Tabpanel (AJAX) add in code behind using vb.net ...
View 1 RepliesMy scenario require's me to create a control from a string that contains the controls name, for example
string a = "TextBox";
using the above string a i need to create the control.Iam using Visual Studio 2008 Pro ASP.Net 3.5
I am using ASP.Net 3.5 with AJAX. I have a situation where I create a table dynamically depending on user input. One column of the table will contain a small image. Right now, it takes a click of the image to show a larger view in a new window. I would like to change it so that when the mouse moves over the image a HoverMenu pops up with the enlarged image view. I have done this with image controls placed on the page at design time where only the image's url is dynamic. How can this be done if image conrtol is created dynamically in the back-end code?
View 5 Replies[code]....
This code DOES Create the Text "TOTO" but does not create image "Targetvignette"the code works ok with BUTTON object as opposed to Image.I have manually created a image with the toolbox using exactly the same credential, this displays OK.it does not catch any exception it just doesnt display anything on the webpage.I can create all sorts of control but not image [Image button] is not that better as it seams to be create but I got no image just "SUBMIT QUERY" textI am confused and stock I have tried i think every single property of the image object i could find.
I want to know how can we create web user control dynamically.
Scenario: Basically i am developing registration user control. I have a web page(say, SelectInputs.aspx) that lists different types of fields along with checkbox attached to each of them for selection. Once i select desired input controls (which should appear in user control) and click submit button then the file (.ascx) should be created from code behind.
eg: Lets say on SelectInputs.aspx i select fields viz. Firstname(textbox), Lastname(textbox), DateOfBirth(3 dropdowns) etc and click on submit button then from code behind the .ascx file should be generated that will include Firstname(textbox), Lastname(textbox), DateOfBirth(3 dropdowns) etc.
I tried to create controls in side MultiView dynamically. The testing code is attached. My question is why the dynamic control is not shown in view2 and it disapears from view1 when <Previouse> button is clicked, even though enableviewstate is set to true?
If the dynamic control is created outside IsPostBack, they are always there. But should we do it this way?
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Test._Default" %>
<!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" >
[Code]....
I have a request:((( Now I can use the TextBox auto-complete but my problem that i use (Key/Value) mean that I should display for example the country name and use the country iso code in the code behind.... so how can I do that by using ajax (TextBox or DropDownList)
View 1 RepliesCan I Use CascadingDropDown without WebService?
View 1 RepliesIs it possible to add a new item to cascadingdropdown? I tried ddl_master.Items.Insert(0, "3"), but it doesn't show up. When I view the source in the browser it's there.
<asp:DropDownList ID="ddl_master" runat="server" Width="200" CssClass="ui-state-default ui-corner-all">
</asp:DropDownList>
<ajaxToolkit:CascadingDropDown ID="cdd_master" runat="server" Category="Action"
[code]...
I use the CascadingDropDown to fill several DropDownList in my web to manage different application access rights
I use the Ajax CascadingDropDown component for that.
My problem is that, depending on the application, the selections criterias of the values in my database will be different.
I would like to know if there is a way to get or to identify the name or the ID of the dropdownlist which execute the CascadingDropdown class in the .asmx part (in the "public CascadingDropDownNameValue[] GetApplication1(...)" class ) ??
The name of the DropDownList give me the code of the application manage use to select my data in my SQL query
I don't want to write several query for each dropdownlist like :
public CascadingDropDownNameValue[] GetApplication1(...), public CascadingDropDownNameValue[] GetApplication2(...) etc ...
as they will be create automatically at the loading of the page.
i am using ajax cascading ddl for binding customer, package, device and leadcount.. i need to bind the package by customer, device by customer & package, leadcount by customer & package & device. but we can pass only one value to the webservice method when binding.. but i need to pass 2 or 3 values to the webmethod. how can we do this. also when i select the customer i need to bind all the 3 controls. but in ajax cascadeing ddl we can give 1 parent control id only. i need the solution for this also...
View 1 RepliesI'm trying to create a calendar extender dynamically on my application. For that i am using the following code:
[Code]....
THe problem is that i'm having a runtime exception, on the OnPreRender of the ExtenderControlBase.cs saying that "A control with ID "filtrodatainicio" could not be found. I'm pretty sure the problem resides in the fact that i'm creating both the text box and the extender dynamically but i can't quite figure out what should i change to make this work.
How would I create an AJAX Accordion pane from the code behind? I would like the user to be able to click a button to add a new pane to an existing accordion control. However, I can only seem to create one new pane because clicking the button after that causes the old pane to be overwritten. I have this in the button click event:
[Code]....
A new pane is created with the correct content, but then it keeps getting overwritten. I've looked around and have seen similar problems but no answer.
I'm dynamically adding a calendar extender like so:
[Code]....
When a postback occurs I get the following error:
Extender control 'ceDateFrom' is not a registered extender control.
Extender controls must be registered using RegisterExtenderControl() before calling RegisterScriptDescriptors().
Parameter name: extenderControl
I've implemented a cascadingdropdown solution using the demo video here on ASP.NET.
Below is my code for one of my sub-categories. I want to have my sub category controls hidden and only show them if there are sub-categories (not all categories have sub-categories)
So, my question is how to get the count of the subcategories returned by method below and turn on the visibility of the dropdown control from the web method?
I'm using a CascadingDropDown in my page and I need to do the following things :
- Getting the list of elements in the dropdown
- Setting a specific value to the dropdown if it exists in the list
I am a total noob in webservices and javascript so I would like to do this in the codebehind but when I try to get the items of my dropdown, the only one returned is the one that is selected on the client side.
Is there a way to get the full list from the codebehind?
I already used the search, but without success.
I want to use a CascadingDropdown inside an Accordion.
The ParentControlID for the CascadingDropdown is in pane1 and the CascadingDropdown in pane2, but it won't work.
When I put them both into one pane it works. But separated into two panes it doesn't work.
I have two sets of cascading drop down lists they are contained in a detailsview <edititemtemplate>. The problem is that when the user clicks update; the original data is wiped out and the user has to redo the selection of all items contained in a cascading dropdown even if the user didn't want to change that particular aspect of a record. If the user doesn't select everything an error is thrown by the stored procedure in regrds to null values not being valid.
Is there a way i can use cascadingdropdown so that the current values are visible when the user clicks update; meaning that they don't have to redo selections for all items involving drop down lists. The current selections would be default values.
I have big problem with the CascadingDropDown. I have 60 CDD with one "Child". So on the page are 60 Parents and 60 Childs. When i use FF3.5 everything works fine when he is the only Browser which is connected to IIS
When i use FF3.0 i get Methode ERROR 403 and 500
When i use IE6 i get Methode ERROR 12030 or 403 or 500
When i use Google Chrome no ERROR no content in the List!?
When i use IE8 sometime it works sometime not!?
This errors are not shown on every DropDownList (but on most of them!) I played with the "<jsonSerialization maxJsonLength="50000000" />" in the Web.config which seams to make it work a little bit better.
What can i do to get the CDD working?
I think it is a timing problem. The CDD are not filled in the order i placed them on the page. Local it works better then remote.
Can you help me?
This is my WebService:
[Code]...
I have the method 500 error problem, I have tried to do a simple reproduction of the problem still the same, if I run the webservice [URL] it returns the values needed ok (5) in xml format, but the dropdown always return error 500 inside, here are the codes (Using VS2008, NF3.5, Windows 7), I have the whole day trying to solve this but I just can't:
[Code]....
[Code]....
[Code]....
[Code]....
'WEBCONFIG
[Code]....
I am trying to populate 3 dropdown lists with using CascadingDropDown. DDLs shows make, model and color respectively. The last DDL is having AutoPostBack = true and I am trying to display the values from dropdown in one label control. I am pulling data from a webservice to populate DDLs. I am not getting any error while compiling but when I run the code it shows Error 500. I am not sure where I am going wrong. I am following the tutorial video of 'How Do I' -
[URL]
I am using C# and .Net framework 2.0. Web Service code looks like this
[Code]....
And Web Page Default.aspx looks like this -
[Code]....
I don't understand where i am getting wrong.
[WebService(Namespace = "[URL]/")]
I downlaoded the sample code accompanying the "Cascading Drop Down Control to Access a Database" AJAX Toolkit video, and added the datasets from the sample code to my application running in VS2008 and AJAX 3.5. I think the sample code is in a prior version of AJAX.
When I ran my project I used to get Method Error 500 and after 2 days of searching the web could not get a solution. Finally by chance I recreated the datasets fresh in my app using the wizard as shown in the video and the error dissapeared and the cascading drop down worked beautifully.