.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Creating dynamic web controls outside Init method

Posted By:      Posted Date: September 26, 2010    Points: 0   Category :ASP.Net


I am creating a dynamic <asp:Table> based on a user's selection from a DropDownList. The number of columns and rows in the table depends on the user's choice from the DropDown.

The final two columns in each row needs to contain an Edit and Delete button. I am able to create these buttons programmatically. However, I am unable to get the click event to fire.

After researching this, it appears to be the case that my dynamic Web controls need to be created in the page Init method.

However, I am unable to do this as I do not know how many table rows, columns and buttons to create, until after the user has made a selection from a DropdownList.

I would be be very grateful for some tips on the correct way to create and enable the events for my dynamic buttons, in this scenario.

Here is a brief outline of how the program currently works (this is just a brief outline I quickly sketched, small details may be wrong!):


<asp:DropDownList ID="ddlMyDropDown" runat="server" 
                onselectedindexchanged="ddlMyDropDown_SelectedIndexChanged" AutoPostBack="true"></asp:DropDownList>

<asp:Table ID="tblMyTable" runat="server" /> 

View Complete Post

More Related Resource Links

dynamic creating controls in webpart


Hello everybody,


My webpart (wss 3.0, VS2005) initialy contain a listbox. Depeding on the selection made a certain amount of textboxes are to be created and rendered. Via these dynamically created / rendered textboxes text can be submitted (via a button), for futher processing.


I am not sure how, or where in the webpart code, to dynamically create these textboxes.


Maybe somebody can give me some advise on this topic.


Thanks in advance









Creating Dialogs and Ribbon Controls for SharePoint 2010

SharePoint 2010 provides new user interface components, such as server ribbons, and the new dialog platform. As a developer, you can create controls for the server ribbon and dialog boxes for the dialog platform.

Need help regarding C# / AJAX Dynamic Controls creation


radiobuttons is assigned before page init.. 

public partial class Default : System.Web.UI.Page
//Assign values as a specific Dynamic WebControl Creation.
List<RadioButton> radioButtons = new List<RadioButton>();
List<CheckBox> checkBoxes = new List<CheckBox>();

Then I created a class that would dynamically create a table containing the available flights depending on session.. (See CallPageLoad())

The placeholder and button is inside the UpdatePanel...

on the button inside the update panel, (btnSelect)

i have this code which works... 

protected void btnSelect_Click(object sender, EventArgs e)

Label1.Text = Convert.ToString(radioButtons.Count);

It detects the number of radiobuttons that were dynamically created...

But when I use the following code inside the BtnSelectClick event...

//PLS HELP.......
foreach (RadioButton button in radioButtons)
if (button.Checked == true)
Label1.Text = "You select... " + button;



It does not work even though t

Dynamic .NET: Creating Interactive Bing Maps with Silverlight and IronRuby


Silverlight provides support for dynamic languages such as IronRuby and IronPython. We'll walk you through the creation of a custom Silverlight control using Bing Maps and IronRuby.

Ashish Ghoda

MSDN Magazine February 2010

Design Patterns: Creating Dynamic Factories in .NET Using Reflection


Design patterns are a powerful tool for designing flexible soft-ware. They provide well-tested solutions to recurring software design problems. One such widely used pattern is the Concrete Factory.

Romi Kovacs

MSDN Magazine March 2003

Problem with Dynamic Controls



I have a custom user control that contains within it a repeater control. Inside this repeater I programmatically add another custom user control, which contains a text box and a custom validator. This final custom user control can be added any number of times depending on the application's logic. All of this is part of a wizard step.

When the user completes the step, if any of the data added to the text boxes is incorrect the validator gets fired on post back. However, because I can have any number of these controls added to the repeater, the user has to scroll down to see any of the incorrectly completed boxes.

Due to the controls being added dynamically it is not possible to use a validation summary control - I have tried!!! Therefore, is there away I can use JavaScript to position a cursor or to jump to each incorrectly completed textbox without the user needing to scroll down the page? For example, if there are 10 textboxes, and textboxes 8 and 9 have numbers inside them inside strings, then the JavaScript should jump textbox 9.

Creating Custom SharePoint 2010 Field Types and Controls with Visual Studio 2010 and Silverlight 3

Learn how developers can create rich experiences in SharePoint Server 2010 publishing sites using Microsoft Silverlight 3.

Video: Creating Custom SharePoint 2010 Field Types and Controls with Visual Studio 2010 and Silverli

Watch the video that accompanies the MSDN article and learn how developers can create rich experiences in SharePoint Server 2010 publishing sites using Microsoft Silverlight 3.

Use .html method to output asp.net controls


Is it possible to use the .html method to output something like an asp:label ??  It doesn't seem to work for me unless they're standard html controls.  Here's my JQuery:

$(function() {
    $("#btnContinue").click(function() {
    $('#pre_register').html("<div id='post_register'></div>");
    $('#post_register').html("<asp:Label ID='lblUserName' runat='server' Text='Enter your desired user name:'></asp:Label>")
        .fadeIn(2000, function() {

Help with creating dynamic XAML

Hi,  I need some help creating a complex XAML. I have a HotelRoom table with the below fields, ID Hotel HotelName Date RoomType Quantity  1    34    Hilton        3/5     Single      30  2    34    Hilton        3/6     Single      30  3    34    Hilton        3/7    Double     100  4    39    Express     3/5     King         10  5    39    Express     3/6    Double      20 Now I want the UI to display as a list of different records of Hotels with room details in them and I have created an object that has all the fields from the HotelRoom table,   HILTON               Single     Double    3/5        30          0    3/6 &n

Re;Creating Dynamic Control

Hi, I have a table which stores the data like mentioned below ID Name Values 1 States Karnataka,Tamilnade,AP,UP 2 Karnataka Bangalore, Mysore, Bidar 3 tamilnadu Salem,Chennai,Pondicherry 4 AP Hyderbad,Secunderabad,Vishakapatanam 5 UP Delhi,Agra Now i have to create a dynamic controls for each and every states from the above table. A Sate Name should be dispalyed with checkbox on check of checkbox i have to enable all the cities which is again associated with the checkbox.How do i simulate this functionality using dynamic checkbox and labels. Please help me with a sample code.

add any number of dynamic controls on press of button

how can i add new control like image on every click of a button. the number of controls added should be number of times i pressed that button

Dynamic method creation using code snippet

Hello, I am looking to map a method from php to .NET. There are various methods I am targeting, and most don't satisfy a one method-to-one method conversion; alot of the mapping really requires a few lines of logic thrown in, and not just "this .NET function call for this php function call." Anyway, I've defined the mappings as strings, and all I need to do is plug them into a dynamic method that will create, run the code, and return the appropriate value. I do not want to create an assembly in the process, which I think leaves CodeDomProvider out of it. And I don't want to generate my code in IL, which I think leaves MethodBuilder and DynamicMethod out of the running. Can anyone lead me in the right direction here? Is there a way to do what I am asking?   Thanks!

Dynamic controls

i want to generate button dynamically and i want to select the dimension and onclick event for that

Creating Dynamic Group Fields for a Crystal Report?

I have a VB.Net application which generates quite a few Crystal Reports. One report in particular has a Group Section. What I am trying to do with my VB.Net app is pass a value (a sql server column name used in the report). This value is represented by radio buttons. For example, the user may check either "ZipCode" or "State" or "Category" or "Type" or "Vendor". Each of these options represent a column in the database table used in the report. I simply want to be able to write the "SelectionFormula" using one of these options but not sure how to go about it. Thanks, Blake

Problem with Dynamic Controls inside an UpdatePanel

Hello Everybody ,I have this problem,if anyone could help me i'll be so gratefull. I had been created some dynamic radio buttons in a loop inside a dinamy table which is inside an UpdatePanel , but i can not handle the events my code is below:public void MetodoCreacion(){RadioButton RBtn = null;Table table = new Table();TableRow row = null;TableCell cell = null;for (int i = 0; i < 5; i++){row = new TableRow();cell = new TableCell();RBtn = new RadioButton();RBtn.ID = "RBGN_" + i.ToString();RBtn.GroupName = "RBGN1";RBtn.Text = "Opcion " + i.ToString();RBtn.CheckedChanged += new EventHandler(RBtn_CheckedChanged);RBtn.AutoPostBack = true;cell.Controls.Add(RBtn);row.Controls.Add(cell);table.Controls.Add(row);}UpdatePanel1_UpdatePanelAnimationExtender.Controls .Add(table);}public void RBtn_CheckedChanged (object sender, EventArgs e){Label1.Text = ((RadioButton)sender).ID;}and the controls doesent call the event ...thanks a lot

Validation on detailsview that contains both dynamic and standard controls?

I have a form that, originally, contained only dynamic controls. Validation worked perfectly, all in one spot.Today I changed three of the controls to cascading dropdown lists, two of them being required fields.After adding a RequiredFieldValidator for the two required fields, it's as though I have two separate validation events:1. Dynamic field validation - any errors show up in validation summary, and after all are resolved, no longer appear2. Required field validation - do not appear in validation summary until after all dynamic fields are validatedA user could press submit, and be alerted of one or more validation errors from the dynamic fields. Then, after resolving all those, the user would THEN see the RequiredFieldValidator messages in the validation summary. That would be understandably frustrating.Aside from using non-dynamic validation & RequiredFieldValidator for each field ... is there any way to have one validation sequence?Hope this makes sense.Thank you!
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend