Web Forms :: Dynamically Add Controls To Asp:panel?
Jun 5, 2010
I currently want to add text-boxes as the user needs them by a button click, but every time the user clicks on the button (after the second click) it erases everything in the panel and then adds the text-boxes to the control.
Reason: I am connecting children to parents, but most parents have more then one child. Some have a crap load of children. So I want to add fields to my panel that they can fill.
Is there something I need to activate or am I screwed.
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
[Code]....
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Jan 5, 2010
I have a 3 level deep nested gridview. The expansion/contraction of each record was originally done with javascript. There were html <div> tags around each gridview. Since these were HTML div tags I could give them IDs that were dynamically bound to record ID value within the database. I then had onclick buttons that passed in a bound record ID value that coresponded to the appropriate div tag that needed to be expanded (e.g. display: inline (show it) or if it is already inline then display: none).
This worked beautifuly. Unfortunatley I wanted to be able to do in-girdview editing of the child records. When expands a parent record and clicks to edit a child record the OnRowEdit event fires which automatically generates a postback and resets the variables within the JavaScript. THEREFORE THE ENTIRE GRIDVIEW STATE BECOMES CONTRACTED.
So finally I decided to change the div tags to <asp: Panel> and the onclick images to .net clickable images (all .net objects no framework). This works because the state is remembered within each postback. However, the problem I'm having is I can't dynamically bind ID's for panel since this is not allowed. HOW CAN I GIVE THE PANEL <% Bind("id") %>. THAT I CAN REFER TO SO I CAN OPEN THE APPROPRIATE PANEL.
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Jul 15, 2010
I have a Data Repeater to which I need to add x number of images depending on their existence in the database.
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The problem is that only the first image is being written to the datarepeater.
[code]....
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Feb 3, 2011
I'm adding a serires of asp:literal and asp:textbox controls to a panel in code as below (the eventual aim being to add only some of the controls depending on the user):
[code]....
How can I control how the panel is rendered, preferably without having to create a custom control?
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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.
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Jan 23, 2014
Below is the gridview with 3 columns and column 1 has panel scrollbar for each item/row:
Column 1 | Column 2 | Column 3
---------------------------------------------------
12345 ↑ | |
14323 | |
43345 | |
45678 | |
↓ | |
-------------------------------------
3333 ↑ | |
32123 | |
544444 | |
99088 | |
↓ |
-------------------------------------
The code on aspx is working well, but I don't want to use it in aspx.
<asp:TemplateField>
<HeaderStyle Width ="215px" Font-Names ="Tahoma" Font-Size ="9pt" />
<ItemStyle Width ="215px" />
<ItemTemplate>
[Code] ....
So, I have a datatable in codebehind show as :
Private Sub GetNumbers()
'Create Table Manually
Dim dt As New DataTable()
'Add Columns to DataTable
dt.Columns.Add("Column 1", GetType(String))
[Code] .....
How to add dynamically <asp:panel> scrollbar for the Column1 in the code behind.
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Mar 17, 2010
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.
linkb.Text = ...
linkb.CommnadArgument = ...
etc...
}
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Aug 13, 2010
What I am trying to do here is I want to add the dynamically created labels in the Panel on the Webpage and not directly on the Webpage. My panel has scroll bars and thus when I scroll horizontally or vertically only the background moves whereas the labels are static to the page. And some labels are even visible on the panel borders on scrollbars (some on the page outside the panel) which are suppose to be placed inside the Panel. So when I scroll either of the ways even the labels should move along with the background image. So how can I make these labels stick to the Panel and not the Page? How do I do it?
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Nov 5, 2010
I have two panels in a formview. The first panel has a dynamically set image to be used as a stationary background and it has a fixed size. Inside of this panel, I have a second panel with its Z-index set to overlay the first panel. This second "text" panel has five labels in it. These five labels contain text of varying lengths. Some much longer than others.
How can I dynamically change the font size of the labels in the second panel (or the panel as a whole) so that the text (remember it has verying lengths) is contained within the margins of the stationary panel?
I am not certain that using panels is the right way to accomplish this, but could find no other way to do the overlay concept.
I should've mentioned - I am working in VB.
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Sep 18, 2013
i have designed a website in that i have image tool but the image must change dynamically the changes is made in admin page.. by which tool we cn obtain that......
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Feb 17, 2010
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.
How can I do this?
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May 1, 2010
I have a design page with two panel,... i have to make it visible true or false by reading the values from the database,...
Design code
<body>
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Jul 5, 2010
is there a possible ways when i click on a add button it will add a text box and a label in panel1.. when i click on the delete button it will remove the last row of text box n label in panel1.which mean i can add a lot of text boxes n labels in panel1 and when i click delete it will remove only the last row of the rows in panel1.
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Jan 25, 2010
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.
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Jun 20, 2010
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.
I have got as far as
UserControl userControl = (UserControl)this.LoadControl(controlName);
this.Panel1.Controls.Add(userControl);
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Aug 13, 2010
What I am trying to do here is I want to add the dynamically created labels in the Panel on the Webpage and not directly on the Webpage. My panel has scroll bars and thus when I scroll horizontally or vertically only the background moves whereas the labels are static to the page.
And some labels are even visible on the panel borders on scrollbars (some on the page outside the panel) which are suppose to be placed inside the Panel. So when I scroll either of the ways even the labels should move along with the background image.
So how can I make these labels stick to the Panel and not the Page? How do I do it?
View 3 Replies
Sep 18, 2010
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.
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Jan 13, 2010
I just don't understand how this is done. I've gone through several questions here and from a few other websites.
Basically, a company will be adding process steps, and I want there to be a textbox with a button next to it that reads "Add another step." Once clicked, a new textbox will appear beneath the current one, and the button will be moved next to the new text box. What do I need to do?
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Jun 22, 2010
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?
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Sep 11, 2010
Here is what I have done so far. I have a datalist to show notifications. The datalist is bound to an sqldatasource.
I have tried to use a collapsible panel extender in the datalist to hide or show message, but the designer could not render the datalist because of the collapsible panel control. It gives an error "Unknown server tag asp:CollapsiblePanelExtender"
here is my code
[Code]....
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Oct 4, 2010
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.
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Apr 22, 2010
I have a checkbox inside a update panel. Based on certain conditions, I set the autopostback property to true and also attach a event handler as below
chkBox.CheckedChanged += new EventHandler(this.ChkBoxChaned_Click);
But when the checkbox is checked/unchecked, autopostback happens but the event handler does not get hit.
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Jul 3, 2010
i want to show dynamically change image from admin panel which is shown in master page, but i can't decide how to do it ?
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Sep 28, 2010
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.
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Aug 30, 2010
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]...
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