Web Forms :: Add Control To Page Programmatically?

Mar 3, 2010

I have code to add a control to page in Init event. I hit error "The control collection cannot be changed during DataBind, Init, Load, PreRender and Unload phrase".

The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.

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Web Forms :: Trying To Programmatically Add A User Control To An Aspx Page

Nov 30, 2010

I'm trying to programmatically add a user control to an aspx page.

the problem is that any postback that happens on the page(even if i added the user control to an updatepanel) clears the user control from the page.

this happens also if the postback is generated from the user control itself.

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C# - Adding User Control To Page Programmatically While Preserving Controls Already Present

Mar 25, 2011

I am trying to add a user control into a div at runtime. I can add the control no probelem but it overwrites the previous control added.Basically, I am trying to add passengers to a travel system - the passenger details are in the user control and I don't know in advance how many there will be. I have an add new passenger button which should append the new user control into the div without overwriting the previous passenger. The code is c#/.net 4. I have tried to save the control data into viewstate and re add it with the new one but that also doesn't work. Here is a snippet of the code I'm using

foreach (Control uc in p_passengers.Controls) {
Passenger p = uc as Passenger;
if (p != null) {

however, p.SaveAs() (just writes the control values into ViewState) is never hit.

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Oct 7, 2010

exactly like cms , i want to create page programmatically with this options:1: page-name2: add template (master-page)and etc...

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I have a custom templated control as follow:


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Web Forms :: Can Add Validator Control Programmatically

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I am adding validator controls to a page on runtime. When I do this it seems to work except for one thing: the page doesn't get validated (the Validate() method is not invoked) - neither on the client nor on the server. However when I can Validate() myself, the validators do their work and generate the required errors. So it looks like the simple fact of adding a validator programmatically causes the page validation to not take place. My page does have validators in the aspx file - they work fine when I don't add any programatically, but as soon as I do add one programatically, the Validate() method is not invoked.

The way I add the validators is by creating an instance, giving values to all relevant properties, and then adding to the page control collection. I tried this in the PageLoad, and prior page-cycle events. The same result occured. I also tried with or without having a ValidationGroup, and with or without having a ValidationSummary control on the page. The same result occured.

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Web Forms :: Programmatically Populate A Menu Control?

Apr 1, 2010

I've an asp menu on my site. I need to dynamically populate this from my database depending on a choice made by the user.

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From what I can gather, it seems that its best to populate the menu via XML - if this is so could someone post a sample of what this XML structure (or let me know ehere I can view this)

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Jan 4, 2011

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Is this possible and how?

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Jan 21, 2011

I am creating a Table Control programmatically and I want after user clicks a button to get the values.

The table has three columns, {Title(DropDownList), FName(TextBox), LName(TextBox)} and two rows.

I am getting the values for FName, LName without problem, but I am getting wrong value for Title, which is a DropDownList. It gives me for both Titles, the selected value of the second column.

More Clear

For the 1st row --> Mr, Foo, Bar
for 2nd row- -> Mrs, Foo, Bar

after user clicks the button I am getting

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This is the method of table creation


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I would like to use a C# foreach loop to access a column in all records in one of two tables that can only be determined at runtime. I have used the foreach command with arrays, but I don't know how to use it with a table in an SQL database. I was using a query command and Reader inside of a do-while loop that fails after all records had been read.

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Sep 1, 2010

How can I set the value of WizardStep.IndexOf() programatically? eg.


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Jun 24, 2010

I have some labels on my web page and I need to hide some of them programmatically.my code

protected void panelLegent_Load(object sender, EventArgs e)
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Web Forms :: Convert Page To PDF Programmatically

Jan 26, 2010

I am using Report.net

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Web Forms :: Create Htm Page Programmatically?

Jan 14, 2010

how do I create programaticaly an HTM page (for exaample 5.htm)

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Sep 8, 2010

Is there any way to create/delete/update a aspx page programmatically using C#?

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Web Forms :: How To Programmatically Control Individual Menu Item Visibility

Nov 5, 2010

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Forms Data Controls :: Programmatically Reference Control Within An ItemTemplate?

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I'm trying to programatically reference a FileUpload control which I have within an ItemTemplate. I get a 'Name FileUpload1 is not declared' error message. Code below:

Code is as follows:



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Web Forms :: How To Add Controls To Page Programmatically And Validate Against Them

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Im using vb.net 3.5, ajax, sql 2005, been programming a while but still consider myself a novice an need some advice. Im building a cms type tool for a knowledge base. And on one of the web forms i need to be able to allow the user to add a set of controls each time they click on a button, the controls they add will be fixed, a set of 3 textboxes. I then need to be able to run a for each loop to check that they have populated the textboxes before running an insert via the tableadapters insert method.

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When trying to populate a Chart control in asp.net 4.0, I cannot seem to get it to show the data in the way I want to.

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Aug 10, 2010

How to Populating the Menu Control programmatically Using an XML File,

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in short this is what i can't do but want to...

page.form.controls.item(0).sytle = "bob"

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I need to post data from my asp.net page to a non-asp.net page that is offsite. How can I do that without redirecting to that page? IE: not using a button's PostBackUrl property.

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I have a usercontrol hosted on a page, registered through the web.config.

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