Web Forms :: RequiredFieldValidator And Link Button Not Preventing Postback?
Mar 30, 2010
I have one TextBox with RequiredFieldValidator control and LinkButton on my page.
May occur the following situation on this page:
I filled the texbox and clicked the linkbutton is make postback on the server - so all ok.When I not filled the textbox and clicked linkbutton it will show message "Please enter your first name." and no postback will happen but when I filled textbox and click linkbutton I got a PROBLEM : Message "Please enter your first name." goes away (correct), but it doesn't preventing posback.
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Oct 4, 2012
I have this simple code:
<asp:Label ID="litInfo" runat="server" meta:resourceKey="litInfo" />
<br />
<asp:TextBox ID="txtEmail" runat="server" /><br />
[Code].....
I am expecting the RequiredFieldValidator control to prevent a postback when the textbox is filled in with an incorrect data and the button pressed. What happens is that the validator displays an error message but a postback is fired.
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Mar 2, 2011
Here is my requirement -
1. I need to load a user control on link click event of a link button during postback of aspx page.
2. On button click event of a save button on that aspx page, I need to read the selected values from that user control on further postback.
If I write the loadcontrol code in link_click event, the control is not recognized at all in the button_click event. When I shift it to page_init and execute only during not postback, the user control loads with default values.
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Mar 15, 2010
I have an existing app that has a java based search utility - this search utility has a FILTERing mechanism. You can click a button to POSTBACK to the server and there, a new window is generated displaying "blah dee da".
So, click a button to filter the utility, click a button to postback and voila, you get your popup aspx.
Unfortunately, the old aspx loses STATE when on the round trip and refreshes itself too - i lose my filter.
How do I go about NOT losing my STATE ?
I understand that specifying the following in the FORM tag on the old ASPX: target="_blank"
takes the focus away from the old aspx and so, the STATE is not lost. However, when the popup generates, a brand new aspx is created along with the asps pop-up. So, I end up with 3 aspx forms!
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Sep 23, 2010
I have 2 link button in my page and every thing was working fine until i added window.onload() method on my page.
After adding window.onload() first link button is working but not the second button. I am using update panel in my page
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Jan 25, 2010
I have a link button with image and label inside it. After postback, the image and label is not visible.
< asp:LinkButton ID="AddNewRunLinkButton" runat="server" CssClass="Navigationlocalnav"
OnClick="AddNewRunLinkButton_Click" >
< img id="Img1" src="../../Images/add_newIcon.gif" runat="server" alt="Add New Run" />
< asp:Label ID="addText" Text=" Add New Run" runat="server">
< /asp:LinkButton>
This link button is used to import/export data. I have added an attribute on click of this link button(AddNewRunLinkButton) to display a progress bar using javascript - SetInterval function. If I remove this attribute, the image and label is getting displayed, otherwise only link button is getting displayed.
AddNewRunLinkButton.attributes.add("onclick","javascript:DisplayProgress()");
function DisplayProgress()
{
timeid = setInterval("addBlock",100)
}
function Addblock()
{
// Display a progress bar as follows - Increase the width of a div tag at this interval
}
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Feb 11, 2011
I have a link button inside a template field of a gridview. The gridview is wrapped in an update panel. I want the link button to fire an async postback but it always fires a full postback. Why is this?
This is a similar problem to the one described in the link below. However, I have tried doing a RegisterAsyncPostbackControl in the gridview databound, but this did not work.
[URL]
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Jan 21, 2010
<asp:HyperLink id="HyperLink1" runat="server" Text="Email" NavigateUrl="mailto:example@mydomain.com" />
This is how I added an email link on my page, but does .net have any built in tool for preventing Robots from finding this address? What is a good way to present an email link that wont be detected by spam robots?
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Jan 19, 2010
I've coded myself into a state of confusion. I have a form with a postal code TextBox and a country DropDownList both inside an UpdatePanel. When the selected country is changed, the DropDownList auto posts back and sets the regular expression used for validating the postal code. The country DropDownList also has a RequiredFieldValidator. The first item in my DropDownList is empty (Value = Text = String.Empty) and when I select this item, I momentarily see the RequiredFieldValidator appear and then disappear. It seems that the client side script is displaying the error message, but then after my partial postback it disappears. I can see in the country DropDownList's SelectedIndexChanged event handler that the RequiredFieldValidator has IsValid = false, so why doesn't the error message stay visible?
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Mar 1, 2011
I need to change a standard HTML Input button to a Link button but am running into problems because the existing
code calls a javascript function. The function basically does the same as the browser back button. When I add the code and
set the property runat="server" I get a "CS1026: ) expected".
Quite new to ASP,net (VS2010) so could be going about this the wrong way.
[Code]....
[Code]....
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Nov 29, 2010
How do I conditionally trigger a full page postback from a link button inside of an update panel?
I have a custom control that contains its own updatepanel with a link button nested inside of it. When the link button is pressed I want its event handler to have the option of either letting the control update as normal or doing a full postback on the page.
Here is the control hierarchy:
Page
Custom Control
UpdatePanel
LinkButton
Event handler Pseudo code:
LinkButton Click Handler Begin
If is a partial post back AND a full postback is needed
Page.DoFullPostback
End If
End Handler
Note: I aways need the partial postback to happen. I was considering injecting a __DoPostback in the controls markup but this seems hacky to me.
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Feb 25, 2011
I'm doing a postback to generate a chart. When the user clicks the button it is using jQuery to add some html to the page to show an animated gif and an overlay.
This works fine in IE and FF but in Chrome the image doesn't load. Anybody know what's going on here?
While looking into the problem I noticed that if I run this code in the JavaScript console it works, and it will work as expected after running it in the console (displays image on postback).
Here is the code I'm using to add the html:
$("body")
.append("<div class='ui-widget-overlay working'></div>")
.append("<div class='ProcessMessage working'><img alt='Loading' src='images/indicator_big.gif' /><br /><br />Loading...</div>");
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Mar 22, 2010
I've inherited some code which breaks a page up into tabs using divs. On the first page there are many required field and regex validators. The problem is a user can switch to another tab, trigger a postback and fail the validators on the first page, leaving things in a mess.
What I want to be able to do is perform the validation on the first page as a user selects another tab, thus preventing them from moving to a new tab until the first page is valid.
<ul>
<li><a href="#tab1">Tab 1</a> </li>
<li><a href="#tab2" onclick="return isValid();">Tab 2</a></li>
<li><a href="#tab3" onclick="return isValid();">Tab 3</a></li>
</ul>
[Code]....
Note use of jQuery for cross-browser compatibility with click event. And this only works if there are no validators on other tabs, as per Thomas' answer, I'll need to use validation groups and extra logic in isValid if any get added.
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Mar 1, 2010
Can I use requiredfieldvalidator apply to a tex box, txtOrderby, if txtOrderby is empty then set button1.enable = false?
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May 7, 2015
I have a dropdown list, where when I select OPTION value a Textbox appears. The issue is that when, I submit directly the required filed errors gives me message for both ie for dropdown and Textbox. It should only give error for dropdown.
Second thing,
The textbox validation is not firing when submitted without any value in it.
see the code for your reference:
<asp:DropDownList ID="ddlGraduation" runat="server" CssClass="txtfld-popup_drp1">
</asp:DropDownList>
<asp:RequiredFieldValidator CssClass="error_msg" ID="reqGraduation" runat="server" ControlToValidate="ddlGraduation" ErrorMessage="Please select
[Code].....
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May 13, 2010
I have a master template that all the pages on my site use. In the template there is an empty panel. In the code-behind for the page an imagebutton is created in the panel dynamically in my Page_Load section (makes a call to the DB to determine which button should appear via my controller). On some pages that use this template and have forms on them, pressing the Enter key fires the click event on this imagebutton rather than the submit button in the form. Is there a simple way to prevent the imagebutton click event from firing unless it's clicked by the mouse? I'm thinking a javascript method is a hack, especially since the button doesn't even exist in the master template until the button is dynamically created on Page_Load (this is ugly since I can't simply do <% =btnName.ClientId %> to refer to the button's name in my aspx page).I tried setting a super-high tabindex for the image button and that did nothing. Also set the button to be the DefaultButton in its panel on the master template but that did not work either. Moreover, I don't want to add a property to all of my pages that use this template (there are hundreds). It would be optimal to find a solution that works globally from my master template.I'll try to show our example here:We have a button on the top of each page in our system that lets you star the page as one of your favorites, sort of a server-side bookmark system. When the page loads it looks to see if the page is one of your favorites or not and then shows a gold star if it is, and a gray star if it is not. Clicking the imagebutton of a star toggles the page favorite status.In my master template (FullMenu.master) I have this panel
<asp:Panel runat="server" ID="pnlFavorite" style="display:inline;"></asp:Panel>
Next there is a class which creates the button and adds it to the panel on the master template:
public void InsertStarButton()
{
CreateStarButton();
[code]....
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Mar 12, 2011
In my gridview i am returning values from database in which 'filelocation' is containing location of pages over my server and i want to use coustom linkbutton in templete field to raise a event and set session variable and then redirect to that page .
My question is how to get value fron 'filelocation' coloum in gried view when a linkbutton in clicked and onclick is fired and also set session value at taht point.
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Jan 28, 2010
I developed a web application in asp.net.I have a module for saving values to database after clicking the button event.Thats working successfully.After that when i clicked the browser's refresh button the values reinserted to the table each time.How can i avoid this .Which is the code for this solution?
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Jan 6, 2010
So I have a button on form that is supposed to execute some code-behind on a click event. To this button I also connected a Modal Popup Extender, which once you click OK, it goes away. What doesn't happen (and it should) is btnSendContactForm_Click never gets called.
Using the OnOkScript didn't help me either. I have tried setting the OnOkScript property of the extender, by calling a javascript that simulates the button click on the send button, but that only re-calls the modal pop extender, and a never-ending loop results everytime you click OK.
<!-- Send Button, Extender, and Pop Up Panel -->
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Oct 23, 2010
I was trying to create a popup logon form for a site I'm working on so I decided to give facebox a try. The logon pops up ok, but the submit button and required validators are not firing. This is within the master page and is contained with a Progress Panel.
In the page header, I have:
[Code]....
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Feb 19, 2010
is it possible to disable right mouse button click event of a link button. i know to disable it in entire page..but i want to disble it for some controls only.
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Mar 10, 2011
I have a script that runs during the Page_Load() event which checks a database table to make sure that the user is still owns the lock on the page. If they no longer own the lock, I disable all the controls on the page and display an
error message.My thinking was that by disabling all controls during Page_Load() I could prevent any PostBack events from occuring. For example, I have a button on the page called "Save and Quit"
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May 18, 2010
now, the error message will display if I move out of current textbox. I don't want to display it until I click submit button.
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Apr 2, 2011
I want to put twitter link on https link. it gives me error/not display twitter count button perfectly.
[URL]
[URL]
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Jan 28, 2011
iam using the Jquery Uframe with asp.net project.Iam getting a postback problem here.
In side the uframe ,button control getting postback the page even the client side method call also.
i tried with the Html button Control also by setting the type="submit" ,iam facing the same problem.
And I got very limited reference about the uframe(codeflex,codeProject).
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