Web Forms :: Can't Find Dynamic Button's Postback In Page.request.form
Oct 8, 2010
I know that dynamic buttons and buttons in general don't use a typical postback and they post through the page.request.form. Okay, so in visual studio, I was able to determine that page.Request.form and in the all-keys property, i SEE my button there. It is the last item in all-keys.
When I am clicking this dynamic button which is in an updatepanel, the script below does not detect it as a button, it is still showing it as null:
public static Control GetPostBackControl(Page page)
{
Control control = null;
[Code]....
but here is the kicker, when I am traversing through the object, I am looking at the object C and the property 'ctl'. The ctl is showing me a value of "ButtonRow_0Col0" and it is of type string. This is good! But , the 'c' control object still says 'null'.
I have a drop down list (created during form design) with auto postback enabled. And I use AJAX to prevent 'visible postback'.
When a user choose an item from the drop down list, the system will then perform a postback and created a set of form control's such as label, drop down list and text box for entry.
Then, I will have a button (created during form design), and when I click on the button, i want to find for the form control that are created after the post back, but I cant find them!
I wonder if those form controls are render to the web form?? But I have no problem finding the drop down list that is created during design time.
I need some high-level advice on how to deal with this issue. I want to have dynamically created buttons, each with a different CommandArgument, that call an OnCommand event when clicked. Given that these are dynamic buttons, I have to re-create them in Page_Load after the postback. However, when I re-create the buttons, the orginal command arguments are lost, and the arguments generated after the postback are only valid.As you'd expect, if I don't recreate the buttons, the event handler is never called because the buttons don't exist.My question is, how can I retrieve those original commandarguments, without the use of sessions.
(Using ASP.Net 2.0 on Visual Studio 2005, coding in C#)I write in the hope that someone will be able to provide a clue as to how I might best overcome this issue:I've got a form with 2 RequiredFieldValidators, and 2 buttons. Button 1 has 'CausesValidation' set to 'False', and populates some of the other fields on the form from the database (via a postback).Button 2 fires the validation, then if the form is valid brings a javascript popup confirmation box and then, if true, it puts the data in the form into an email.All this is working fine. However......My problem is this: If I press button 2 with my required field(s) empty, the form quite correctly refuses to submit, and highlights the appropriate field(s) with a red *.But: if I then press button 1 (my populating button) it DOES NOT FIRE until I press it a second time!Code snippet follows (markup only - I will of course post code-behind if nec. but I don't think it is)
<script type="text/javascript"> function ConfirmSubmit() {
I have a news list and when I click on every each news, it navigates to another page where I can see news details. What I need is I want to request every news title in news details page and show it in <title> section in <head> as the pages title. It means the <title> tag in news-details page must be dynamic and will change depending on every news articles title. But I don't know how to do this because the only parameter that will be sending from news-list page to news-details page is news-id and not news title.
I do some stuff with dynamic DropDownLists. A choice at one level makes the next level appear and so on.
When I open up an old report for editing, the first level is not editable so I set that DropDownList to Enabled=false (still dynamically in code).
My problem is that when I press save (a LinkButton) I first come to my OnInit as usual and check the Page.Request.Form for my DropDownLists, but then the first list is not represented.
But if I change one of the lists when editing, a postback is made, then there is no problem at all with the Page.Request.Form, the first list is there all the time.
Is there some fundamental difference with causing a PostBack from a LinkButton vs a Dynamically Added DropDownList?
I need to know if there is any server-side function/custom-code available to find out the HTML of the entire page which is causing the PostBack.
I don't want to do it using JavaScript/jQuery but instead do it at server side.
A JavaScript workaround that implements it can be found at this link. [URL]
Reason, Why I need it? I am writing some inline javascript in page which performs some vital actions and supposed not to be tampered by user(hacker). So, when a postback occurs, I would like to find out the HTML of entire page (at server) so that I can verify it (I have already generated the hash code for entire HTML while rendering the page to check it on consecutive postbacks) for non-tamering and then process further.
This is the reason why I need a way to find out the HTML of the page causing the PostBack.
I'm using HttpModule to capture requests to the web server. Before processing the page I'd like to check the values contained in some keys of the Request.Form collection and according to some logic change if necessary. I'd like to do this when BeginRequest event is fired. The problem is that the Request.Form collection is readonly.
I am creating a button dynamically in my code and attaching a click event to it. However I have to prevent people to click it while there is a process going on. So when it is clicked once, it should be disabled and when the process ends it should be enabled. How can I do that?
the possible options to get the dynamic web pages. Existing application: We have windows application to desing the "Screen designer templates". The end user uses this application to make his own screen templates, save the information in xml and get the screen in run time. This works fine for windows based application. Current Problem: Its difficult to provide such screen designer application in web. I mean Drag & drop the controls in web page during the run time. So we are planning to use windows application to design the template. And during the run time user should get his own designed template on web page. We are trying to display the similar web form like as windows form with matching controls. let me know what are the options available to solve this problem.
I have a couple of fields on a form that will be populated with default values. I would like to put a button that will allow me to reset those fields to their default values if they have been modified. However I would like to avoid the postback so that I don't have data being sent to the database. Is it possible to add a javascript hook such that when that button is pressed I can pull the default values and populate those fields in javascript?
I am creating a Payment request form that my customers are going to fill out and submit so they get paid I would classifi it as an invoice. Does any one have any examples or point me to a good place to read about creating this type of form and the database tables to support the application?
The form will basically have some fields they will fill in for the header then in the related stuf come charge amounts with there types aka partnumbers of sorts and also the ablity to put in there own types / aka partnumbers and there amounts. I wont be housing any amounts they will supply all the information of payment amounts and types.
i have an odd thing with the Request.Params / Request.Form.i have a literal control in my masterpage.
[Code].... So far pretty basic i thought. But to my suprise the geLocation turns out to be null. The control wasn't found... when i then use a link from the dashboard page to another page which has the same masterpage, everything on that page seems to work fine.
I have a form that works just fine, problem is that if user leave form open for more than 20 30 min and then click a button on that form the browsers status line shows "Error in page", user then must refresh the page in order for the page function.
when i browse the page with firefox and click on the input Request.Params["btnshoppingCart"] != null or Request.Form["btnshoppingCart"] != null is statisfied.
When i browse the same page with internet explorer 8 and click on the same input Request.Params["btnshoppingCart"] != null or Request.Form["btnshoppingCart"] != null is not satisfied. When i used the watch i saw that there is no key by the name of "btnshoppingCart" in either Request.Form or Request.Params if input is clicked from internet explorer. However when it is clicked from firefox there is value "shoppingCart" inside Request.Form and Request.Params against "btnshoppingCart" key. One more strange thing that i observed was that are two keys "btnshoppingCart.x" and "btnshoppingCart.y" inside both Request.Form and Request.Params whenver clicking is done from both internet explorer and firefox. This is happening against all inputs of type image irrespective if the input is present inside a html form or not. Forms are created like this
<% using (Html.BeginForm("Action", "Controller", FormMethod.Post)){%>
The version of internet explorer is 8.0 and firefox is 3.6.6
I have a simple page that displays a gridview once 3 criteria are inputed. I would like to add an submit button so that the date just not auto populate the gridview.
I have created a web form in which i have used user control there is link button on different link button user control loads . i have added dynamically webcontrol to that link button . they are loading properly but when i try to save data through one of user control on click of button the user control disapper from that place but when i put static user control to my page its working
I have page on which I've a login control in which I've a subnit button. The problem is this that when I refresh the that page the submit button or any button that was clicked last before page refresh gets its click event automatically fired.
I have a page, the user types in e-mail and then submits. The next page is a confirmed page - letting the user know that his -mail was entered. If you then click back, the forum will try to re-submit itself. Is there a way to stop this?
I have a dynamic Table which contain 8 rows and 8 Colums
Table t = new Table(); TableRow rr = new TableRow(); TableCell cc = new TableCell(); and in the each Cell CC I add a dynamic Button(Or Linkbtn) LinkButton LB1 = new LinkButton(); LB1.Text = "AM"; LB1.ID ="Link1"; cc.Controls.Add(LB1); rr.Cells.Add(cc); LB1.Click += new EventHandler(LB1_Click); t.Rows.Add(rr);
i have a table with 8 rows , 8 colums and each cell contain a LinkButton (which diffrent in IDs) I want to add Lable in the same cell of this LinkBtn(LB1) which it clicked but I cann't What shoud I write here?
