VS 2012 - Dynamically Created Controls In Update Panel
May 2, 2014
A simple poll system that loads questions and possible answers.
I load questions, so that each one is generated as a DIV element and placed inside a DIV element already present in HTML markup.
Next, for each question I load answers, generate them as LinkButtons and add them to the corresponding DIV controls collection.
This all works as expected, the questions and answers are all nicely generated.
Now, all the dynamically created controls are placed in a DIV element that is inside an Update Panel.
HTML MARKUP:
HTML Code:
<asp:UpdatePanel ID ="infoUpdate" runat ="server" >
<ContentTemplate >
<div id ="info" runat ="server" >
<asp:Label ID ="infoLabel" runat ="server" ></asp:Label>
[Code] ....
The problem is, that I can't seem to register the dynamically created controls with the UpdatePanel, so when I click a LinkButton it doesn't do a Full PostBack.
Below is the sub I use to generate the controls:
vb.net Code:
Private Sub createPoll() Try
connection = New SqlConnection(connectionString)
connection.Open() ''Get the currently active poll ID
Dim sqlQuery As String = "SELECT pollID FROM polls WHERE pollStatusID = 1"
Dim myCommand As New SqlCommand(sqlQuery, connection)
[Code] ....
As you can see, I tried adding a handler to each control and then adding the control to the UpdatePanel ContentTemplateContainer, but the clickEvent never gets fired.
I also tried adding triggers for each controls, but it made no difference.
I am quite sure this has to do something with the Page LifeCycle, but I just can't see it.
I have a grid view in Ajax UpdatePanel. In a column of a grid view I have a button call btnAddNewRecord. I need to fire btnAddNewRecord.Click event once I click on that.
I'm writing a code for a custom webpart that will retrieve data via data reader or data set (not sure which is better). In the code I will separate data into 4 categories (always just 4). Each category of data will be displayed in a tab panel, so a total of 4 tabs in the tab container. All of this is created dynamically in the CreateChildControls() method. So far I have it working for with one tab and I don't know how to separate the data into the 4 tabs.
Here the what I've got so far (simplified for posting):
_dr = bll.drGetData(id); Panel panel1 = new Panel(); while (_dr.Read()){ DataList dl = new DataList();
NOTE: This is where I think I need to branch off the data into the 4 categories but I'm not sure how to implement it.
dl.ItemTemplate = new MyTemplate(LIstItemType.Item); dl.DataSource = _dr; dl.DataBind(); panel1.Controls.Add(dl); AjaxControlToolKit.TabPanel tp = new AjaxcontrolToolkit.TabPanel(); tp.Controls.Add(panel1); TabContainer tc = new TabContainer(); tc.Tabs.Add(tp); this.Controls.Add(tp); public class MyTemplate : ITemplate{ ListItemType _itemType; public MyTemplate(ListItemtype Type){_itemType = Type;} pubilc void InstatiateIn(System.Web.UI.Control container){ LinkButton linkb1 = new LinkButton(); linkb.DataBinding += new EventHandler(TemplateControl_DataBinding); container.Controls.Add(linkb); } private void TemplateControl_DataBinding(object sender, System.EventArgs e){ LinkButton linkb = new LinkButton(); linkb = (LinkButton)sender; DataListItem container = (DataLIstItem)linkb.NamingContainer; if(Convert.ToInt32(DataBinder.Eval(container.DataItem, "id")) >= 1) {
NOTE: Although here is where the databinding takes place so I woud assume the categorization the data can take place here as well but I dont see how.
I have some code that I am working on that uses an UpdatePanel and some dynamically created buttons to perform functions. The problem is that the dynamically created buttons aren't working the same as my test static button, which is behaving exactly as it should be.
So I was wondering if someone would be willing to simply post an example (in VB.NET or C# please) of the following:
An UpdatePanel has a Label and a Placeholder inside of it
The Placeholder has a dynamic button added to it
Clicking on this button will make the Label say "Hi" without performing a full page postback.
If I can just get that much to work, I am sure that the rest of the code will be fine. I just can't seem to get my dynamic buttons to act like my static ones do in an UpdatePanel.
Ive came into a problem when using partial page update. The javascript doesn't fellow. What i want to do is when i call a partial page update some of the update have controls that require a javascript code to be executed. When the partial update is done that javascript isnt here and cannot be found. So what is the best way to make a javascript file to fellow a partial page update ?
i have an update panel, which contains a repeater inside. The repeater's data source will change on postback. The repeater will generate a div for each item.
I need to set the height of the div that is generated by the update panel to the actual total height of the div inside the repeater.
Basically I have a usercontrol that is setup to capture a persons education details. I want to have a button inside the update that when the user clicks loads the usercontrol below the previous usercontrol.
In my webform, i have 3-4 textbox, on there textchange event i have to fetch data from database and put it on the form. I have taken another html table (with runat="server") below textbox and and in textchange event created a new <tr>, <td> and simply added contents in <td>, then finally added <tr> in the table. This is done in UpdatePanel.
When i enter something in textbox1 data is added in that table,that's fine. But when i enter something in 2nd textbox the previous data is overridden. My requirement is that if 2nd textbox's text changes than another row with appropiate data should be added, i.e., now two rows. Silimarly if 3rd ,4th textbox data changes then subsequently 3 or 4 rows should be displayed.
I am hoping someone can help me out. I have a web application that contains a usercontrol think "employment details" a user can enter a previous employment detail.
I have created a page that contains an update panel a placeholder and a button. The button I want to use to load a new copy of the same usercontrol. Can anyone point me in the right redirect?
I'm creating an quiz application which queries the database and extracts the questions and choices. I use dynamically created controls such as a checkbox list and fill the values dynamically. How do I do this? Right now I have these functions:
array_random_init(); this creates a 10 element integer array from 1-20 - extract_question(i): this extracts a question indexed at i in DB, I created the controls and set the appropriate text in this function. - validate_question(i); this is called by button_click and validates the question i according to DB.
I understand I have to recreate the controls in Page_init on postback, but what should it look like? Do I need to add "if IsPostBack" in page_init, or do I create the controls in page_init() and reset their properties in page_load when I use extract_question(i)? Also, I cannot seem to clear the selected boxes on postback, I added page directive "enableviewstate=false" but it doesn't work.
I have a pretty simple C # page that when the page first loads, a bio is diplayed in that center section based upon sql executed from my code behind. I have 4 link buttons on the page that when clicked, fill that center section with other content based upon which link button they clicked (News, Publications, Contact Info, and Presentations). I was all done, then I thought about using an UpdatePanel to get rid of the annoying "flicker" when the page posts back on the click of the link button.
We have two update panels on our webpage. Now first update panel is having button cancel. While second update panel is having a file upload control.
Now if the user uploads a file that is going to upload in about 2 mins, and in between, say after 30 seconds the user clicks the cancel button, the upload taking place in update panel 2 should stop.
I have an AJAX Modal Popup panel that contains a RadioButtonList, 2 labels and 2 DropDowns. I want to update the Labels and DropDowns when a radio button is selected. My attempt at this posts back which causes the ajax popup to disappear.
aspx called on image click: <asp:Panel ID="pnlModalContainer" runat="server"> <asp:RadioButtonList ID="rblTest" runat="server" RepeatDirection="Horizontal" OnSelectedIndexChanged="rblTest_SelectedIndexChanged"> [code]...
add the validation controls to them.The first page has a series of text boxes with autopostback = true. I can put CompareValidators onto the form and assign them to the textboxes, and they seem to work right. On my second page, however, the controls are being built on the server using vb code. The CompareValidators seem to work on the client side. On the server side, however, the CompareValidators always have an IsValid property = true, even when the value of the textbox clearly violates the conditions. I've checked all the properties I can think of and I can't see any difference between these dynamically generated validators and the static ones I have on the first page, so I'm thinking there must be something else going on.
I have a web app and one of the forms has a gridview and also two tables.
Because of this, I have a save button that saves new data; and I also have update buttons that appear each time the user clicks Edit in a row of the gridview.
I would like to see if there's a way to combine my save with my update so that the user only has to click one time to save.
I was looking for the update button link that appears in my gridview via the source code page, but it's no where to be found.
Is there a way to move the update button or not show it? Not sure how to even start using the save to incorporate both.
I am using asp.net 3.5 c#. I am trying to do this:
In one page, a user can insert some stuff (name, phone .. etc) to the database. And then the user should be able to see the rows he added as a list automatically in a datalist (or other control). As he inserts rows, it appears in the datalist.
I tried to use update panel and inside it datalist, with a button as a trigger but it did n't work with me!
I have one update panel inside updatepanel i have one dropdownlist .When i change dropdownlist value so as per value button1 which is out of updatepanel not visible =true or false as per dropdownlist value.
I have written a Crystal reports web application, that prompts ths user for parameters and then apply them and exports the report to a folder as .rpt and then display the report.
I prompt the parameters on one screen and then display the report on another page. I have the AJAX update panel and update progress controls in the parameter page. When the user enters the parameters and click on ok, I export the report and then loads the report to a session report document and transfer the user to the second page where the report is displayed. I use the following code to do transfer to the seconds page.
I have excluded the report load and parameter assign code here.
[Code]....
In the second page I have the following:
rptViewer.reportsource = Session("rpt")
My problem is this works one time and then stops working the second. What I found out was it comes to the statement:
Response.Redirect("show.aspx")
But it does not even load the show.aspx page. It stays on the parameter page. There are no errors displayed. I could not see any errors when I debug the application also. And out of the blue it works sometimes. And if I remove the update panel and progress control, my report works all the time.
I have a tree view with checkboxes for leaf nodes. If i click on checkboxes, I am creating some html controls dynamically. And in other static button click event I need to get an ID's of those dynamically created controls.
I will have to retrive data from database assume this is the data I got
|No | Name| 46 ANN 24 LISA 20 JOAN 41 JACK
and so on. I will have to create checkbox dynamical by these data like this
checkbox ANN checkbox LISA checkJOAN checkbox JACK
I will create a container and then create checkbok , then add control to container.. my problem is how to give it a break each 3 controls? and how to format them like this
<TR> <TD width =33%> checkbox ANN </TD> <TD width =33%> checkbox LISA </TD> <TD width =33%> checkbox JOAN </TD> </TR> <TR> <TD width =33%> checkbox JACK </TD> </TD>
In my code behind (c#) I dynamically created some RadioButtonLists with more RadioButtons in each of them. I put all controls to a specific Panel.What I need to know is how to access those controls later as they are not created in .aspx file (with drag and drop from toolbox)?
I tried this:
foreach (Control child in panel.Controls) { Response.Write("test1"); [code]....
"test1" and "test2" dont show up in my page. That means something is wrong with this logic.
I know this question has been asked thousands of times, and I've struggled with it before, but for some reason, I can't accomplish what I want to accomplish... I have a dynamically added LinkButton that when clicked will dynamically add a control (in this example, a textbox) to the same panel. The intent is to continuously add on as many controls as times the LinkButton was clicked (i.e. I click it once, one box, then another click will give me 2 boxes, another click adds a 3rd). In the code below, I use the current date and time serialized to create a unique ID for each textbox control.
When I execute the code, clicking "Add Filter" will generate a new textbox, but once clicked again will create a new one, and dispose of the one before it. Instead, I want to persist the previous textbox as well as any data submitted within it.In the aspx:
