Web Forms :: How To Find Command Name For Dynamically Generated Linkbutton

Jan 17, 2010

how to Work with Dunamically generated Link buttons..

I need to find the unic name of each dynamially generated linkbutton..]

Is there any way to work with that..

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Web Forms :: Linkbutton In Dynamically Loaded User Control Does Not Handle Command Event

Feb 27, 2011

I have a user control that is dynamically added to a placeholder control inside an update panel in my main page. The user control has a linkbutton where I try to handle its Command event. The first time the link button is clicked after the user control loads, the form posts back but the command event handler does not execute, although the user control is still on the screen. The second and subsequent times the link button is clicked it works perfectly. When the user control first loads and I mouse over the link button, the browser status bar says: javascript: __doPostBack('ctl08$lbTest',''). After the first click, when I mouseover the link button the browser status bar shows javascript:__doPostBack('ctl07$lbTest',''). Why the changed in id, I can't figure but it must be why it is not hitting the event handler the first time it's clicked. Here is the cs code that loads the user control:


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C# - How To Get Linkbutton Id That Is Generated Dynamically From Code Behind In The Eventhandler

Apr 27, 2010

i have create two linkbuttons dynamically:

for (int i = 0; i < 2; i++)
LinkButton lb = new LinkButton();


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How To Use The FindControl Function To Find A Dynamically Generated Control

Jun 10, 2010

I have a PlaceHolder control inside of a ListView that I am using to render controls from my code behind. The code below adds the controls:

TextBox tb = new TextBox();
tb.Text = quest.Value;
tb.ID = quest.ShortName.Replace(" ", "");

I am using the following code to retrieve the values that have been entered into the TextBox:

foreach (ListViewDataItem di in lv_Questions.Items)
int QuestionId = Convert.ToInt32(((HiddenField)di.FindControl("hf_QuestionId")).Value);
Question quest = dc.Questions.Single(q => q.QuestionId == QuestionId);
TextBox tb = ((TextBox)di.FindControl(quest.ShortName.Replace(" ","")));
//tb is always null!

But it never finds the control. I've looked at the source code for the page and the control i want has the id:


For some reason when I look at the controls in the ListViewDataItem it has the ClientID:


Why would it be changing Numberofacres to ctl00? Is there any way to work around this?


Just to clarify, I am databinding my ListView in the Page_Init event. I then create the controls in the ItemBound event for my ListView. But based on what @Womp and MSDN are saying the controls won't actually be created until after the Load event (which is after the Page_Init event) and therefore are not in ViewState? Does this sound correct?

If so am I just SOL when it comes to retrieving the values in my dynamic controls from my OnClick event?


So i changed the code i had in my Page_Init event from:

protected void Page_Init(object sender, EventArgs e)
if (!this.IsPostBack)
//databind lv_Questions


protected void Page_Init(object sender, EventArgs e)
//databind lv_Questions

And it fixed my problem. Still a little confused as to why I want to databind regardless of whether it's a postback or not but the issue is resolved.

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Web Forms :: How To Access Linkbutton At Gridview Row Command Event Without Using Commandname

Dec 12, 2011

I want to access linkbutton at rowcommand event which is in footer and without commandname. 

Actually i have a linkbutton in empty data templates footer template. At the rowcommand name of this linkbutton i want to access other linkbutton to change its commandname.

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Web Forms :: Create Linkbutton (onClick) Dynamically - Trying To Create A Linkbutton Inside A Calendar?

Sep 28, 2010

I am trying to create a Linkbutton inside a calendar. Everything works except for the onClick.

Is there a way to make this work?


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Linkbutton Command Argument Code Behind?

Feb 9, 2010

I'm trying to duplicate this link button in code behind, but I'm having problem with command & commandArgument


First of all I don't see onclick in above code (not code behind) after rendering.

I probably have to do something different with""" linkbtn.Attributes.Add("onClick", "Imageswap")""""

What am I missing?

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MVC :: Executing The Command Definition And Error Is Generated Connect With Remote Server?

Oct 21, 2010

In my mvc asp.net application,I am getting error in edit function : in given code


I am getting this exception:

Source : System.Data.Entity

Stack Trace : at System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand
entityCommand, CommandBehavior behavior) at
context, ObjectParameterCollection
parameterValues) at


1 forMergeOption) at System.Data.Objects.ObjectQuery


1 source) at


1 query, Expression queryRoot) at
System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[S](Expression expression) at System.Linq.Queryable.First[TSource](IQueryable`1
source) at admin.com.Controllers.DocsGridController.Edit(Int32 id) in

Message : An error occurred while executing the command definition.See the inner exception for details.This error is generated when I connect with remote server.

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Forms Data Controls :: Cannot Find LinkButton In Repeater?

Mar 25, 2011

I am very confused about this problem, and i have tried a lot of things to fix it, but for some reason it rejects finding my LinkButton..aspx page:


I have tried the following things and still getting the message the the object reference not set to an instance:




And still it tells me that the object reference is not set to an instance. I find this very strange and hopefully there's someone who can tell me where i make a mistake?

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Forms Data Controls :: Find LinkButton In DetailsView?

Apr 22, 2010

I'm trying to find an autogenerated delete button in a detailsview using this code but it is not working:


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Web Forms :: Dynamically Generated DropDownLists?

Jun 30, 2010

I have a dropdownlist on my page which has autopostback set to true. On postback I populate a runat server div with a bunch of other DropDownLists. I then have a button which does another postback to save the selections. Because the second set of dropdownlists are dynamically generated I cannot for the life of me figure out how to get their selected values?

1st DropDownList


Then when I try get the dropdownlists using a foreach on the div that I added the control to it does not work. They are populating fine, its just on the button click. I have tried EnableViewState = true on the dropdownlists and my code is correct because if I code them into the aspx then it works, its something to do with the state.

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Forms Data Controls :: How To Find Linkbutton Control Using RowDataBound

Nov 9, 2010

I am trying to find my linkbutton control using RowDataBound using the below code



but it always comes back with null the lnkButton.

What is the issue here?

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Web Forms :: WinZip With Command Line - System Cannot Find The File Specified

Aug 20, 2010

I am trying to zip files using command line Below is the code I am using.

Dim filePath As
String =
"C:Program FilesWinZipWINZP32.exe"
Dim outputfile
String =
Dim csvfile
String =
"D: est1"
Dim startInfo
As System.Diagnostics.ProcessStartInfo
startInfo = New System.Diagnostics.ProcessStartInfo(filePath,
"winzip32 -min -a " & outputfile &
" " & csvfile)
startInfo.UseShellExecute = False
startInfo.WindowStyle = Diagnostics.ProcessWindowStyle.Normal
startInfo.CreateNoWindow = False

I am getting the Win32 Exception. (System cannot find the file specified.)

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Web Forms :: Dynamically Add Linkbutton In VB.NET?

Jul 18, 2010

I have dynamically added some linkbuttons top my page using vb.net

1) how do I add an event handler using raiseevent at runtime

2) I woul like to pass in a vlau to the fuction

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Web Forms :: Referencing Dynamically Generated Controls?

Jul 9, 2010

I'm displaying a table based on query results, and each record has a dynamically generated dropdownlist and submit button (and other controls, but this is simplified). That part works fine, but how do I reference the controls in a function? Here is the code I've tried. Create the controls:


Reference the control values (hopefully):


The function SubmitAction_Click fires when I click the Post button, so that part works. I just can't figure out how to reference the selected value of the dropdownlist. You can see that I'm explicitly giving the DDL a unique ID (DS_RecordID). I'm guessing I have to use FindControl to reference it, but I don't know how to format the code.

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Web Forms :: Dynamically Generated Usercontrols And Their Values?

Feb 11, 2010

I have implemented a user control with dropdown lists and textboxes where user may choose to add more of the same user control dynamically then submit the values within all usercontrols at the same time. They way I added usercontrols dynamically is whenever user clicks "add more" button, it increases the value of "userControlAmount" in session by 1, reloads the page and during next page_load event, within an updatepanel it creates usercontrols on the fly.

However whenever more is added since all usercontrols are generated again according to the latest user control counter, the values within the dropdownlists and textboxes are getting reseted.

I can hold all values in a viewstate/session however beyond the time/effort it will take, it doesn't sounds very "professional" to me. I was wondering if there is a more efficient way of doing this.

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Web Forms :: Reading Dynamically Generated Textbox Value?

May 27, 2010

I have a form that has dynamically generated textboxes using javascript.

My question is how can I read the values of these dynamically generated textboxes since I dont see any HTML in the page source for these textboxes even though they appear in the page.

I tried to read using

var str = document.getElementById('txtHello').value;

It always returns null.

txtHello is the Id which I have given to the textbox when I generated it dynamically using javascript.

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Web Forms :: Dynamically Generated Button And TextBox?

May 21, 2010

I am generating a button dynamically at runtime and in event button click I am generating a TextBox dynamically at the runtime.

My question is I should be able to generate TextBox on every click. Suppose say, If I click three times then there should be three textboxes generated.

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Web Forms :: Get The Radiobutoomlist Selectedindex From A Dynamically Generated?

Jul 20, 2010

I've to implement dynamically generated 'Tests'. It seems the best asp control to handle each's test option is the RadioButtomList control, thus I am writting in c# code to load programatically a table, render on rows the Tests' questions, and the options via radiobtuttonlist as the code bellow shows.

THE PROBLEM's since I did not ID each radiobuttomlist, once the test's end user submit his choices, I do not know how to get the selected item for each control so I can compute the results.


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Web Forms :: Client ID Of A Dynamically Generated Control?

Feb 23, 2010

I've recently added a Master Page to my site,but realized that it's caused some problems in my existing JavaScript setup.I am able to use the following code in most places without any issue to get the ClientID: '<%=myControl.ClientID%>'

The problem I have encountere is that I have several pages that add controls dynamically,and then execute events based on an ID that's passed in,where I can't use this line,because I won't know the ID of the control I'm trying to access until the Javascript executes.Here's a simplified version of the problem:

When the page runs,it creates n textboxes dynamically,and appends a relevant ID from the database to the end of the ID.Let's say the page has added 3 textboxes with the following IDs:




Later,a javascript event fires,and I need to be able to access the control through JavaScript like this:

myJavaScriptFunction (controlID)

myvar = document.getElementById('myTextBox' + controlID);

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Web Forms :: Create A Linkbutton Dynamically In VB?

Sep 27, 2010

I am trying to create a linkbutton dynamically using visual basic.

I am having trouble creating the "on click" postback to a sub

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Web Forms :: How To Get Dynamically Created LinkButton ID

Apr 25, 2013

I have a link button let's say LB1 wherein on click of the LB1 a modalpopupextendar will open up with a textbox where we can enter the message and onclick of Ok button the entered message will be saved. Let's say we have repeated the above steps for thrice. So there will be three rows created in DB. Let's say column name UID is the primary key.Now, I am displaying the each message inside a panel along with Link Button(LB2) which is created dynamically while reading the text. So,The first row will contain

UID:1 Message:Message1

Comments:Comments Link Button(LB2)

The second row will contain

UID:2 Message:Message2

Comments:Comments Link Button(LB2)

The third row will contain

UID:3 Message:Message3

Comments:Comments Link Button(LB2)

When I click on Comments Link Button(LB2)  a modalpopupextendar will popup wherein we can enter the comments. Let's say we are clicking on LinkButton of Message 1, a pop up opens and after entering comments and ok button the comments are saved for all the three messages instead of saving it for message 1, i.e I couldn't find the unique id of the message.

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Web Forms :: Getting Dynamically Generated Controls By Id With FindControl Function?

Mar 18, 2010

I'm trying to get dynamically generated control by id with FindControl function, but it doesn't return it

here's short version of code when I generate controls, it is basically in a loop to have number of CheckBoxes depending on inputs





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Web Forms :: Event Is Not Raised For Dynamically Generated Checkbox?

May 6, 2010

I have a asp.net page where we need to dynamically generate a table, table row, and a checkbox controls in this row. A button serves Add Row and create checkbox function, which works fine. We have another button which serves on deleting the selected row if a user checks the checkbox. The deleting event is dynamically added to the checkbox. But the delete button is not working at all. I think that the page does not maintain the states of dynamically generated controls, even I set Page enable view state to True. Here is the code:

I am generating a table dynamically with one row having four cells.

First cell is having checkbox and below is the code how i declare it and assign it a new id at runtime.


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Web Forms :: Can Bind The Dynamically Generated Table Content To Div

Feb 23, 2011

i'm trying to bind the dynamically generated table content to div using


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