Why Dynamically Created HTML Input Empty After Postback
Jun 15, 2010I add HTML and tags to Page dynamically. But after every postbost, all values are empty. What can I do for Solve?
View 2 RepliesI add HTML and tags to Page dynamically. But after every postbost, all values are empty. What can I do for Solve?
View 2 RepliesI have a table thats created dynamically, the table gets its contents from a custom class I've created that gets statistical data from a database. As the table is generated dynamically, I've put the contents class (the table data) into a session object and I populate the table initially inside a !IsPostback then on the page init I get the data from the session (its empty on the firts page load). I am now getting this error: Multiple controls with the same ID 'controlnamehere' were found. FindControl requires that controls have unique IDs. How can I avoid this?
View 4 RepliesI have created button 2 below:
<input id="Button1" type="button" value="Stop"
onclick="alert('hello world');"/>
<input id="Button2" type="button" value="button" OnClik="alert('hello world');"/>
using a litteral tag on page load like this:
protected void Page_Load(object sender, EventArgs e)
{
Literal1.Text = "<input id="Button2" type="button" value="button" OnClik="alert('hello world');"/>";
}
Incredibly when testing in browser, click on button 1 works, not click on button 2 whereas the codes are the same !
i am trying to get html input value from codebehing using name attribute of input
the input is created by client on dropdownlist change event
html input like <input type=text name=myinput value="123"/> and codebehind code like Request.Form("myinput") is nothing
also Request.Form.AllKeys does not contain name of myinput
my question is it is possible to get html input value that created on an event with javascript from codebehing using formnamevaluecollection
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:
<asp:Panel ID="pnlFilter" runat="server">
</asp:Panel>
In the aspx.cs:
protected void Page_Init(object sender, EventArgs e)
{
LinkButton lb = new LinkButton(); [code]....
In my code I create a table dynamically and I try to restore the table after a postback. But although I recreate the table during the Page_Load event with the same id's before,the table doesn't appear with the same state and values as before.
I think it will be a typically beginner error, but I wasn't be able to locate the error whereas reading different posts and tutorials related to this topic.
//Code behind
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack & _hfsubmittedURL.Value == "tbCreated")
{
TableRow row1 = new TableRow();
[Code].....
I know this has been asked before, but I feel like I'm losing my way trying to follow the other examples out there. Does anyone see a straightforward solution to my particular problem?
Goal:
Two column Master Page
Left column contains a list of [stuff] (I'm trying a Repeater with LinkButtons)
Right column contains a TabContainer which will add dynamically created tabs when buttons on the left are clicked.
Left side looks like this:
<asp:Repeater
<ItemTemplate>
<asp:LinkButton ID="lbShowReport" runat="server" Text='<%# Eval("Title") %>' CommandName="Select">
</asp:LinkButton>
<asp:HiddenField ID="hfReportID" runat="server" Value='<%# Eval("Id") %>' />
</ItemTemplate>
</asp:Repeater>
I had initially been creating tabs in the LB's OnCommand event, but of course this means that any tab generated by one click is lost if the user clicks another LinkButton.
So I moved the code to create a new tab to the OnInit section of the page and attempted to loop through the RepeaterItems comparing the UniqueId of each LinkButton until I found the one that was clicked using Request.Form["__EVENTTARGET"].
When I tried to loop through the RepeaterItems, however, the count was always 0, and the Repeater would not populate.
So now I am rebinding the Repeater in the Init section on every post-back - this allows me to find the LinkButton that was clicked. I then add the new Tab based on the LB that was clicked like this:
[Code]....
This properly adds new Tabs to the TabContainer using this code:
[Code]....
but I still have the issue where I can only ever have one dynamically created tab in the TabContainer at a time. All of the code above is being executed in OnInit, which I thought would save the tabs during post-backs, but instead this is behaving as tho I was adding the tabs in the OnCommand event of the Link Button...
I'm passing a List to an MVC view and generating checkboxes for each object in the list (The checkboxes are named t.Name).I'd like to be able to tell which checkboxes were checked once the form is posted. However, I'd like to avoid using the FormCollection object.
View 1 RepliesMy problem is:
I've got a table, dynamically created, fill with a lot of dropdownlists witches IDs are dynamically created.
When a button is pressed, I need to scan all controls in the table and save their value.
But after the postback I can't no longer access to the table.
I have a script which creates a dynamic textbox (and more) in an AJAX async post back. But when I try to acess the textbox I am told "Object reference not set to an instance of an object". I have been strugleing with this for a long time. This is written in C# .Net 4. The line causing the problem is the very last one where I have tbGameName.Text.Trim()
[Code]....
I dynamically create gridview, and in this grid I have template field also
field.HeaderTemplate = New GridViewTemplate(ListItemType.Header, col.ColumnName)
field.ItemTemplate = New GridViewTemplate(ListItemType.Item, col.ColumnName)
grdEmpty.Columns.Add(bfield)
but when enter some value in text box in this template field i lose value on postback. And also on postback I lose all template field and i must re-create this grid.
My goal is: I have button and i want to add new row in this grid, but i want to have old value also.
i have created Array of Linkbutton and when user click on link button it will create an array of Radio Buttons but it requires Postback all time so page load takes more time...
View 2 RepliesI have an input box that I don't want postback to occur on someone striking the enter key
I want the javascript event to take place instead.
<input
type="text"
id="addressInput"
onkeydown="inputenter()"
autopostback="false"/>
function inputenter() {
if (event.keyCode == 13) {
seachLocations();
return false;
}
else {
return false;
}
}
i've a contact form that's plain html and an asp.net button to post everything to server side (and eventually validate).
the problem is that if server-side validation fails, input-values are not manteined.
what's the best client side to mantein fields value?
this is my actual jquery code, i use css selectors:
<script>
$("form").submit(function() {
var asapReqStr = "???";
var asapTmp = $(".asapRequired").val();
[Code].....
I am using Javascript to create dynamic controls on the page I am not dealing with File Uploads, just creating custom field things.
I think I need to override SaveViewState and LoadViewState events to keep my controls in the ViewState.
I want to make a button that will create set of 4 textboxs everytime user click it and I need to save every sets of this to db.
how can i bind this textbox to the model or just forgot about strongly-type?
honestly,This is my third day on asp, .net , and MVC.
I am beginning to write a dynamically generated, database driven form. It will be split into several sections, each section having a "next" button, that will save the current section and proceed to the next.
Ive not begun yet but as its generated dynamically this will all be on the same page and either postback, or redirect to itself and the questions will be loaded into a repeater, choosing the input type based on whatever in the database.
My problem is that one section of the form works slightly differently.
I need to ask all the names and birthdates of everyone who lives with you, so I would need the form fields, an input button and then when pressed save the data and load into a repeater, which will have its own delete button as itemcommand.
I have a couple of RadioButtons that are created dynamically. But after postback they don't retain their checked property. I also have some CheckBoxes and they work just fine using the same mechanism (code below). I have narrowed down the problem to the "GroupName" property. If I remove it, it works just fine. But I need the RadioButtons to be mutually exclusive.
[Code]....
So I have two UpdatePanels. I am dynamically creating server-side buttons in UpdatePanel2. When the buttons come out, they are not hooked to the asynchronoustriggers of updatePanel1.
So how can I dynamically add these triggers of these newly dynamically created buttons so that clicking these buttons will only cause a partial postback to UpdatePanel1 ? Right now, when I click these buttons, it causes a partial-postback refresh to UpdatePanel2 (the panel itself that which the controls reside in)
I am coding online sales a website but I've a problem on main page I have to show products I made it as 4 columns table but there is over than 100 product and i need paging for that. How can I fix it like 20 products per page.
View 2 RepliesWe are creating html Table dynamically on the basis of data fetched from database and assigned id to each Cell while creating them dynamically. But the problem is how to access values in Cell. Because we are not able to get id of Runtime generated TD.
View 2 RepliesI have a small form with some static elements that I am able to access with javascript the bring up a popup. 4 textboxes are generated and attached to a updatepanel. I've been trying various methods of validating the contols without generating postback.
I found anytime i registered a javascript to the scriptmanager the page must refresh.
Is there anyway it can be done?
I created a templatefield programmatically and it works fine but whenever I clicked the button inside the gridview and do the postback my templatefield are gone.
View 3 Replieshow to add checkbox(input html control) which will be appear dynamically in datatable.
View 1 RepliesIn design time I created a Gridview and a delete button in a page test.aspx:
[Code]....
The program stopped at statement "if ((row.Cells[COL_INDEX_SELECTED].Controls[0] as CheckBox).Checked)",
because it cannot find the checkbox created before.
I tried to shift all the code in Page_Load to Page_Init, but the ticked checkboxes are still lost.
I could find the ticked checkboxes names in its request object parameters(this.Request.Params.AllKey) if I setup a breakpoint on the error statement.
Does anyone konw what's happening and how to retrieve the selected rows?