First time I have used the site. I appreciate the help I have gotten from the users before and hope to contribute as well as ask. Now, for the question.
I am developing a static toolbar that rests on the bottom on the webpage. The purpose is to display a couple of values to a user purchasing something and for the toolbar to update the information to reflect the choices. There is currently a box on the page that does this, but it rests at the top and the user would have to continuously scroll to see options appear, price changes, etc.
The values update just fine with the price in that box when certain check box buttons are clicked that auto-refresh the page (due to these check boxes changing pieces of the code). However, some things that can effect the price require a button on the page that 'recalculates' to be clicked. The information on this page is put on the page with a controller. The toolbar I am creating is a separate control.
What I am trying to do is have a button within the toolbar that will mimic the actions of the purchase button that recalculates. I tried doing this:
Code on control page for toolbar:
<input type="button" id="buttonID" class="buttonClass" runat="server" onclick="__doPostBack('<%= btnIDOtherControl.ClientID %>','OnClick');" value="Recalculate" />
Code on control with the purchase info:
<asp:ImageButton ID="btnIdOtherControl" runat="server" ImageUrl="~/image.jpg"
AlternateText="Recalculate" OnClick="recalcFunction_Click" />
That is just the current iteration. Before I did not have the 'OnClick' piece of the __doPostBack, I had ''. I also tried using a bit of jQuery. There are quite a few questions about firing an ASP.net button from javascript, but none seemed to work.
What happens is I have gotten it to a point where clicking the recalculate button in the toolbar actually DOES refresh the page, but none of the values change. If I click the recalculate button from the purchase page (where it exists normally), the value in the toolbar does not change even though the values on the page do. If I hit the recalculate button from the toolbar AFTER recalculating from the main page, the toolbar values reflect the regular values. Any other normal use of the page (such as the checkbox that auto-refreshes) will change the values correctly in both places.
If more info is needed just let me know.
Appreciate the help ahead of time!
This has to be done by using javascript or jQuery.
Use the code below:
$("#buttonID").click(function(){
$("#btnIdOtherControl").click();
});
This will trigger the button on other control to be triggered.
PS: Make sure that the ids are correct once the page is rendered in html as visual studio will append the ids of the button in the control to be (id of the control)_(actual id of the button) i.e. If on your page you have referenced control as
<user:control id="control" runat="server">
The id of your button (buttonID) on html will be control_buttonID, so you will need to use that (control_buttonID) in jQuery.
So your code will be
$("#control_buttonID").click(function(){
$("#control1_btnIdOtherControl").click();
});
On you other control make a public property with set only and call your button's click event in it, Then on your working control you have to call only that public property of other control. it should be like this :
public void PublicPropertyCallingEvent
{
set
{
Button1_ClickEvent(null,null);
}
}
You have to access this property only wherever you need.
I have 3rd party user control (a captcha control), which has a captcha image, a text box within it.
I am using the above user control in my webpage. I have a 3 submit buttons on my webpage (Validate Captcha, Submit Page, Add User). When I click the Validate Captcha submit button using the mouse, I am validating whether captcha is empty and showing a javascript alert.
The problem comes when I enter the valid captcha text in the textbox and hit enter key when the cursor is in the textbox. The page just refreshes. I am unable to add keypress event to textbox and call Validate Captcha button event as I am using the 3rd party user control which I cannot modify.
Also, Page.ClientScript.RegisterHiddenField(...) will not work in my case as I have two other submit button inside the same page.
Only option left is to enclose these in panels and set default button.
Please let me know if anyone has any better options for achieving this.
Greetings! I too use alot of third party controls. The thing to remember about these controls, it that in the end they just emit HTML. This means you can use the DOM to access and attach event handlers such as onKeyPress. The trick is to identify how your control creator named the control you are looking for, in this case a {textbox}. The easiest way to achieve this is to simply run the page and view the page source. It is there that you can find the name as it is rendered and sent to the browser, after that all you have to do us use document.getElementByID to get the object and setup your handler
Example:
<script>
//Place this AFTER your textbox control is declared in the HTML
//Get the textbox
var textbox = document.getElementById('nameOfRenderedControlHere');
//Assign the event handler and function you want it to call
textbox.onclick = function() { validateCaptcha(); };
function validateCaptcha()
{ //Do your Stuff here }
</script>
That should be it..havent tested, let me knwo if you run into questions.
Put the captcha in its own <asp:Panel> and add a DefaultButton property for the panel with the ID of the captcha's submit button.
Some weird stuff is happening, I am converting an application that used to use javascript to open another web page in a tiny window for data input to use a ModalPopupExtender.
It seems to work fine, but in the OK event, when I do txtData.Text (the textbox in my modal popup), it comes back with a comma before the data, so if you type "Rabbit", it comes back as ",Rabbit".
Also when I use it multiple times, in another place where I might click to show it, and type "Fish", it starts coming back with stuff like ",Rabbit,,Fish"
I don't know why or how to stop it from doing this... any ideas?
Same here. No clue for why it happens. Every postback initiated by buttons within the panel adds commas and previous values to all text fields.
Hooking into TextBox.Text setter revealed that the corrupted data comes from postdata collection. So it means that just before postback the ModalPopupExtender corrupts the data.
P.S. I'm not using UpdatePanel, but regular Panel so there are no triggers associated with buttons.
Updated: Solution found.
The problem seems to go away when rolling back to May's release of AjaxToolKit (http://ajaxcontroltoolkit.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=27326).
Just sharing this solution to everyone on this problem. Try not to use asp control instead use html.
*<input type="text" id="txtID" runat="server" class="myClass" />*
this works fine for me.
Thanks,
I also found a forum indicating that it may be standard html behaviour for when there are multiple controls on the form with the same name. This in mind (and assuming there is a bug in the ajax controls) The way I coded around it was to add in my Page_Load the following kind of statement for each of my textboxes.
string[] vals = txtValue.Text.Split(Convert.ToChar(","));
txtValue.Text = vals[vals.Length - 1];//It appears my latest value was always in the last item
Since the form load happens before the button event I sort out my fields before they get to the event that deals with their values.
I had a similar problem, having a jQuery Dialog inside an UpdatePanel. As I could read on different sites, the problem is caused by duplicates inside the DOM tree.
In the end I found a very simple solution. I assign the dialog to the div, then open or close it by JavaScript and then run this little peace of code to remove the duplicates:
var count = $(".dialog").length;
for (i = 1; i < count; i++) {
$(".dialog").first().remove();
}
EDIT: it turned out not to be SO simple. In the end, my code looked like this:
In document ready (and also asynchronous page calls):
function AddDialog() {
var dlg = $(".dialog").dialog({ autoOpen: false });
dlg.parent().appendTo($("form:first"));
var targetSelector = ".myDialog"; // watch out: can't use ID here!
if (mustOpenDialog) {
$(targetSelector).last().remove(); //-- remove last copy
var dlg = $(targetSelector).dialog({ autoOpen: true });
var count = $(targetSelector).length;
for (i = 1; i < count; i++) {
$(targetSelector).last().remove();
}
}
if (mustCloseDialog) {
$(targetSelector).dialog("close");
var count = $(targetSelector).length;
for (i = 1; i < count; i++) {
$(targetSelector).first().remove();
}
}
}
In my complete code, mustOpenDialog and mustCloseDialog are set in codebehind.
I had the same problem with previous values coming back comma separated. It seemed that my ok button was inside the update panel and I had it in the triggers section aswell. Removing the button from the triggers section of the updatepanel solved the problem.
best regards - Tobias
My answer was similar to Smarty's. My page looked like this...
<UpdatePanel>
<GridView>
<Button> <-- These buttons fire modal popup programmatically.
<Button>
<Button>
</GridView>
<ModalPopup>
<HiddenField> <-- Dummy target of modal popup.
</UpdatePanel>
The fix was to change it to this...
<UpdatePanel>
<GridView>
<Button> <-- These buttons fire modal popup programmatically.
<Button>
<Button>
</GridView>
</UpdatePanel>
<ModalPopup>
<HiddenField> <-- Dummy target of modal popup.
I had to register each button as a postback control with the scriptmanager on the gridview rowdatabound event. The down side is that I have more full postbacks. But, it solved the problem.
This is pretty late reply, but I am documenting it here so that other may benefit.
My Scenario
Open user control inside jquery dialog on button click. This user control had update panel inside it and few textboxes. First time open the dialog, it worked like charm. On subsequent clicks to open the dialog, I noticed a weird behavior. I had few textboxes inside the user control(inside update panel). On any partial post back, the text of textboxes changed to current text, current text. If the value of textbox was fish, then upon any partial postbacks its changed to fish, fish.
The reason for this was I was using jquery to open the dialog. I also appended the dialog to form upon the click of the button.
dlg.parent().appendTo($('form:first'));
So on subsequent clicks multiple user controls where appended to DOM and hence while building the post back data, there existed more than one control with same id and hence there values where appended using "," - comma.
So my solution was simple, while closing the dialog, I just removed it from DOM
I got hint from following link. Posting it here for future reference
here
For some reason it doesn't seem to happen if the textbox is set to ReadOnly.
I'm thinking there could be a workaround by displaying an editable textbox to the user, catching the keystrokes to it, and updating a readonly textbox that is hidden from the user.
Still a bit messy, but I can't roll back to May's release because there's another bug in that release with the ComboBox that I need to avoid!
UPDATE:
As a bit of background, I have a user control (ascx) inside my modal popup because I need to reuse it. The ascx has to handle the user's input itself (the containing page doesn't know what's going on inside the control) so when the user clicks a button I do a callback and process the data. If a successful result is returned to the client callback function then I simulate a click of what the containing page thinks is the "OK" button which is actually invisible to the user.
I've changed my code to add a hidden, readonly textbox and copy the text from the original textbox into the new one every time the text changes.
<asp:TextBox runat="server" ID="txtName"></asp:TextBox>
becomes
<asp:TextBox runat="server" ID="txtName" onchange="document.getElementById(this.id + 'RO').value = this.value"></asp:TextBox>
<asp:TextBox runat="server" ID="txtNameRO" ReadOnly="true" style="display:none;"></asp:TextBox>
then when passing values back in the callback instead of getting the value of txtName, I use txtNameRO.
I don't think this will help if you're doing a postback, but you could add a callback before the postback like I have. Hopefully this will help someone anyway!
I had this issue and lost quite a bit of time on it and found that it was caused by an extra tag hiding out that I forgot to remove when changing markup.
Make sure on the .aspx page all tags line up correctly.
<div>
**Lots of code here**
</div> <-- That guy owes me a vacation!
</div>
I have successfully implemented a complete hack based on Jen's response. I use an asp:HiddenField to hold the value I want to post back, and I populate it with a pure HTML input box
<asp:HiddenField ID="txt" runat="server"/>
<input type="text" onchange='document.getElementById("<%= txt.ClientID %>").value = this.value;' />
This is lighter weight than Jen's solution as you're still only posting back one server control.
BTW, this is a very significant bug in the Ajax Toolkit. You can vote and comment on it here:
CodePlex Issue
Pretend you're in Chicago. Vote early, vote often.
For me the solution was to get the modal poup out of the main update panel. Once I did that the commas went away. If you truely need an update panel inside of the modal popup, create one of it's own inside that panel.
I did not need to roll back to previous version of the toolkit.
I have been trying to solve this for a day now and some very helpful person in my office has come up with a terrific solution!
We moved the ModalPopUpExtender and subsequent pop up panel controlled by the extender to ouside of the outermost UpdatePanel on the page, created a fake button and gave the ID of the fake button to the TargetControlID property of the ModalPopUpExtender.
<asp:Button runat="server" ID="dummyButton" CausesValidation="false" Style="display: none" />
<cc1:ModalPopupExtender ID="ModalPopupExtender1" runat="server" TargetControlID="dummyButton" CancelControlID="CancelPopUp" PopupControlID="PanelID" BackgroundCssClass="modalBackground" />
Inside my forms/page where the PopUp extender and panels used to be, I created an OnClick event on the button that we used to use to trigger the ModalPopUpExtender.
<asp:ImageButton ID="ButtonID" runat="server" Text="Add" ImageUrl="~/Images/Add-32-1-small.png" OnClick="LoadPopUp" />
On my button that triggers the ModalPopUpExtender, I have created an OnClick event called "LoadPopUp" - in LoadPopUp in the code behind I simply put ModalPopUpExtender1.Show();
protected void LoadPopUp(object sender, EventArgs e)
{
ModalPopupExtender1.Show();
}
I had the same problem except I am not using the AjaxControlToolkit or update panels. My problem was solved by moving the <form> tag from the ASP.net master page to the page where the textboxes are. May help someone.
has same problem and i found the solution here: http://ajaxcontroltoolkit.codeplex.com/workitem/26259
The problem is ajax last version, just INSTALL year 2009 ajax version and modalpopup will work fine with your actual code.
Tuve el mismo problema y encontré la solución en el link que indico arriba.
El problema viene con las versiones recientes de ajax, simplemente instala la version del año 2009 y el modalpopup funcionará bien con tu código actual.
The solution is to get the modal popup out of the main update panel. Once Do that the commas will go away. If you truly need an update panel inside of the modal popup, create one of it's own inside that panel.
Here's what I want to do. I want the users to be able to delete their own posts but I want them to confirm this first, so when the user clicks the Delete link, I want to display a confirmation dialog with Yes and No (the standard Javascript confirmation dialog), if the user chooses 'No' nothing happens and the page won't post back but if they choose 'Yes' the page should post back to the server, how can this be done with Javascript in ASP.NET?
Thanks
Edit:
Thanks a lot guys, I guess I'll go for OnClientClick="return confirm("Are you sure?");"
You need to (in your code behind):
Use the ClientScript object to get the postback reference for your button as a string
Modify the OnClientClick property of the button to include the followign javascript and the previously retrieved reference:
btn.OnClientClick = "return confirm('are you sure?');" + btnPostbackReferenceString;
Profit.
add your confirmation to your button like that :
submitButton.Attributes["onclick"] =
"if (!confirm('Do you want to continue ?')){return false;}";
if user selects no, confirm returns false, then your code returns false and the postback will be avoided.
Note that : if you return confirm('some text'), your postback will be avoided whatever user selects.
I have a few controls that inherit from ASP.NET buttons and use onserverclick.
If the user clicks twice, the button fires two server side events. How can I prevent this?
I tried setting this.disabled='true' after the click (in the onclick attribute) via javascript, but that blocks the first postback as well.
See this example for disabling control on postback. It should help you do what you're trying to achieve.
http://encosia.com/2007/04/17/disable-a-button-control-during-postback/
You don't necessarily want to show the button disabled on postback. You want to make sure they don't accidentally submit twice. So disabling or hiding the button as a result of a server-side action is already too late in the game. By this point the 2nd request is already on it's way. You need to either do it with javascript or make sure your server side code won't run twice.
In case of an updatepanel and a button inside a FormView-Template I use the following approach:
// Using that prm reference, hook _initializeRequest
Sys.WebForms.PageRequestManager.getInstance().add_initializeRequest(InitializeRequestBuchung);
// Abfangen von Mehrfachklicks auf Buttons für asynchrone Postbacks im Updatepanel
function InitializeRequestBuchung(sender, args) {
var arrButtonIds = ["ButtonInsert", "ButtonUpdate"];
// Get a reference to the PageRequestManager.
var prm = Sys.WebForms.PageRequestManager.getInstance();
if (prm.get_isInAsyncPostBack() & jQuery.inArray(args.get_postBackElement().id, arrButtonIds) > -1) {
args.set_cancel(true);
}
}
This cancels the following postback if an async postback is currently still active. Works perfectly.
Someone else said this somewhere on here a few days ago, and I concur - use javascript to simply hide the button instead of disabling it; you could show a "spinner" image in its place, which lets the user know what is going on.
Instead of hiding, what I have done is swapping buttons using javascript. Show another greyed out image on the click of the first button.
Set the Button property UseSubmitBehavior to false. Then create an OnClientClick function that disables the button.
It would look something like this:
<script type="text/javascript">
function disableFunctn(button){
button.disabled = true;
}
</script>
<asp:Button ID="button1" UseSubmitBehavior="false" OnClientClick="disableFunctn(this);"/>
fastest cheapest way:
<asp:Button ID="button1" UseSubmitBehavior="false" OnClientClick="this.disabled=true;"/>
You can also try for example btnSave.Enable = false; when the button is hit and before the processing for the button is done in the Click Event routine. If you need it to be reset to allow it to be enabled have a separate button that resets the button for reuse.
Another method is to set the button with verification so that the user is asked if they want to Save, it should pop up both times.
Yet another method would be to flag the first occurrence then set a popup for the second to verify a second or subsequent usage.