Web Forms :: Validation Fails When Fields Are Populated On Page_load

Feb 17, 2011

I'm writing a small web application in c# and i'm running into a small problem.

Basically, on page_load() my backend MySQL db is queried to bring back the user data, and that is then inserted into the textbox controls as below:

[Code]....

Now the problem occurs when the RequiredFieldValidator kicks in. In my form processing function, I call Page.IsValid(), it fails and displays the required message next to the required fields.

I was wondering if there is a workaround for this, or a better way to go about what i'm trying to do.

View 4 Replies


Similar Messages:

How To Extend Server-side Validation Controls To Raise An Event If Validation Fails

Feb 23, 2010

I am using ASP.NET's server-side validation. In the page_load event I'm calling Page.Validate(), and if Page.IsValid is not true I'm then polling the controls to figure out which ones are not valid, and then determining what actions to take.It would be much easier if each control would raise an event as validation fails, allowing me to take action for that particular control. I'm very much a naive programmer when it comes to validation, but is there a way to extend these controls so that a validation error raises an event?

View 1 Replies

Forms Data Controls :: Hide Formview Fields On Page_load Event?

Jan 12, 2010

In my table there is no record then I'm going to hide my formview fields on page_load event,

it gives an error "object reference not set to an instance of an object".

How can I hide fields in formview all mode?

View 5 Replies

MVC :: Validation Fails And Returns Whole Form With Validation Message?

Mar 18, 2011

Can anyone tell me how to re-display a form when validation fails, i'm having a problem in that when i submit an empty form, the whole ascx file is returned with textbox and button etc.

[Code]....

View 2 Replies

Is It Possible To Use Validation Controls When I Need To Modify HTML When Validation Fails

Mar 16, 2011

Let's say that I have the following HTML for a text box on an ASP.NET page:

<div class="myClass">
<asp:TextBox ID="txtMyTextBox" runat="server"></asp:TextBox>
</div>

It is easy enough to add a required field validator to this page like this.

<asp:RequiredFieldValidator ID="valMyTextBox" runat="server" ControlToValidate="txtMyTextBox" ErrorMessage="My Text Box is required."></asp:RequiredFieldValidator>

But I need to modify the HTML slightly if this text box fails validation. I need to add a CSS class to the DIV. So if the user leaves this field blank I need the HTML to look like this:

<div class="myClass error">
<asp:TextBox ID="txtMyTextBox" runat="server"></asp:TextBox>
</div>

Is this possible? I can't figure out if there is a way to write code behind that only fires if this particular validator control fails validation or something. I know I can write code that runs when the entire page is not valid. But I just want this code to run when this validator returns invalid. Hope this makes sense.

View 2 Replies

MVC Return To Page On Error With Fields Populated?

Jan 13, 2011

I am starting a new project in Asp.net MVC 2.I have been mostly a webforms developer and have limited exposure to Asp.Net MVC and hence this is probably a noob question.

My situation is as follows:

I have a create page for saving some data to the DB. The view for this page is not strongly bound / typed - so the way I am extracting the data from the view is by looking at the POST parameters.

Incase there is an error (data validation, etc), I need to send the user back to the previous page with everything filled in the way it was and displaying the message.

[Code].....

View 1 Replies

DataSource Controls :: Refer To Fields In ObjectDataSource During Page_Load?

Jan 5, 2010

At first, I had my datalist being populated by my class 'PM' - I did it all inside the Page_Load event. Since there was a dataset being returned, I could assign different variables to fields in the Datatable, like:

[Code]....

Now, for reasons I won't go into here, I'm changing to an ObjectDataSource, using the same method to do the 'Select' of data... How can I do the same variable assigning, with the ObjectDataSource?

View 4 Replies

Web Forms :: How To Clear A Label Field If Validation Fails

Mar 5, 2010

I have got a label that displays the result of the last action (ie "Success - Record Upload") I also have a Validation Summary and when validation fails i want to clear the label so it no longer displays the result of the last action.

View 4 Replies

Web Forms :: Validation Control Fails But Still Postaback Occurs?

Nov 6, 2010

I have a page where user can create their account. I have several validation controls on the page.When user clicks submit button the message box pops up with appropriate messges(as configured in validation summary). But once users clicks the OK button, then the form submits. Ideally it shouldn't do it?

View 5 Replies

MVC :: How To Keep A Hidden Field Populated On Validation

Jan 31, 2011

I have a form in MVC3 that includes a check box to copy data if it is the same as a previous form. If the checkbox is checked, it populates the text box with the content from the hidden field. Here's a sample to illustrate what I'm doing:

[Code]....

When the box is checked, it calls FillInfo(), which uses DHTML to fill the TextBox called "ThisInfo" with the value of the hidden field "DefaultInfo."

Here's the problem: if the form fails validation (e.g. "ThisInfo" is a required field and is left blank), the hidden "DefaultInfo" box is getting cleared out -- which I DON'T want it to do. As a result, when the checkbox is clicked, it is copying empty data into the "ThisInfo" field.

View 8 Replies

Web Forms :: Hyperlink Control With AlternateText Property Fails Html Validation

Mar 10, 2010

Line 44, Column 69: there is no attribute "AlternateText" You have used the attribute named above in your document, but the document type you are using does not support that attribute for this element. This error is often caused by incorrect use of the "Strict" document type with a document that uses frames (e.g. you must use the "Transitional" document type to get the "target" attribute), or by using vendor proprietary extensions such as "marginheight" (this is usually fixed by using CSS to achieve the desired effect instead).

This error may also result if the element itself is not supported in the document type you are using, as an undefined element will have no supported attributes; in this case, see the element-undefined error message for further information.

How to fix: check the spelling and case of the element and attribute, (Remember XHTML is all lower-case) and/or check that they are both allowed in the chosen document type, and/or use CSS instead of this attribute. If you received this error when using the <embed> element to incorporate flash media in a Web page, see the FAQ item on valid flash. I can't figure this out.

View 2 Replies

Web Forms :: Scroll To First Error In Long Form When Validation Fails In Validators

May 7, 2015

when I submit the buttion i got the validation error at that time i want my page up , i write a jquery validation code  

View 1 Replies

Web Forms :: When Any RequiredFieldValidator Validation Fails Display Generic Error Message To User

Aug 9, 2012

I use validation control in my page when users click on button if they don't enter data in textboxs it show massage in validation control

I want In addition to using validation control when users click on button to insert data  it show error massage thar show EX: "please complete your form"

How I can do it ?

View 1 Replies

ASP.NET Validation Issue - DropDownList Being Populated Dynamically On Client?

Apr 28, 2010

I'm populating a DropDownList using JS on the client and validating with a RequiredFieldValidator.This works fine on the client but the Page.IsValid consistently comes back false on the server.Is this because the selected value wasn't in the DropDownList when it was first served to the page?What's the easiest way around this? (I need to leave server validation turned on)

View 1 Replies

Viewstate Validation Fails (but Only Sometimes)?

Feb 5, 2010

The following message appears in our log:The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request. alot has been written about this subject. However, I cannot reproduce this behavior, and I only find a couple thousand errors per day in the logs; so it's probably isn't that obvious.

The page in question has an UpdatePanel and loads one of three usercontrols depending on the querystring.Is there any known issue with some clients, or any other possible explanation?

View 2 Replies

Best Way To Debug A CompareValidator That Always Fails The Validation?

Dec 6, 2010

What is the best way to debug a CompareValidator that always fails the validation? Is there any way to see what the values are that it's comparing to maybe get a clue as to what's going wrong?

View 2 Replies

MVC :: Model Validation Passes In Firefox And It Fails In IE

Feb 14, 2010

I am uploading a JPEG image in an ASP.NET MVC web site.

The model validation fails in IE, but passes in Firefox, when I try to check the mime type of the
HttpPostedBaseFile.

So I debuged it and I found that when using Firefox the Mime type is "image/jpeg" as expected.

When using IE8 the mime type is "image/pjpeg".

Don't say that Microsoft invented a new Mime Type of JPeg images?

View 3 Replies

AJAX :: TabContainer Doesn't Appear When Validation Fails

Nov 17, 2010

I am using Master/Content pages. Master page has <asp:ScripManager .... />. Here is how things are set up

[Code]....

1st Issue

When validation fails, button still postback (why ? ).

2nd issue

When validation fails, button still postback but then TabContainer doesn't appear (empty page is displayed, what happened to the tabs ?)

When the page has no errors, button postback the page and then every tab appears as supposed to be.

I am using VS2010 .NET 4.0.

View 5 Replies

C# - Display A Message If Client Validation Fails?

Oct 7, 2010

I'm working on an application form for a website which implements ASP.NET validation (including client side).

I have a requirement to display a message at the bottom of the page if the client validation fails. Something along the lines of "Please go back and check your answers".

The problem is, the submit button's OnClientClick event obviously fires before the client validation.

View 2 Replies

How To Prevent Loading Of Data When Postback Fails Validation

Feb 5, 2010

I'm trying to prevent data from loading on the page when its needed.

Currently, I check the IsPostBack bool to prevent loading data in my user controls which allows the data to be loaded when the page is initially requested.

However, if my page fails validation and the page is sent back to the user with error messages, my user controls no longer have data in them because the initial request was a postback.

One solution is to have a flag in every user control (IsFailedPostBack) to force them to reload their data. Is there a better way?

View 1 Replies

Event Validation Fails On Android Phone Browser?

Aug 11, 2010

We're running a fairly large site, and a lot of our visitors have started using their Android based cellphones to visit the site. However when they try to login, we get an Event Validation error:

Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

Does anyone know of a way to fix this, without disabling Event validation entirely ?

It isn't every single time they visit, but it is often enough that it's a problem.

Also we never get these on PC-based browsers (IE, FF, Chrome, Safari, Opera, etc.)

EDIT:

The page this happens on has no updatepanels, no custom __doPostback code, etc. It's pretty much vanilla with a simple LinkButton that causes the postback.

Also this error occurs on a bunch of other pages as well (Just found out about that now), so I doubt it's a lone design fault.

View 1 Replies

Setup The ModalPopupExtender To Not Show When The Validation On The Page Fails?

Mar 17, 2010

How do I setup the ModalPopupExtender to not show when the validation on the page fails? I have a RequiredFieldValidator on a textbox. On Submit, I would like to show the ModalPopupExtender ONLY if validation is successful.

View 2 Replies

Web Forms :: Add Validation To Form (Email - Website Fields)

Apr 19, 2010

I am a completely new to ASP but have been given the task of creating some simple forms for my employer. how I could validate the Email, Website fields? And also make the Post Code a required field?

[Code]....

View 3 Replies

How To Display Tooltips Instead Of Plain Text When Form Validation Fails

Feb 6, 2011

I have been asked to display tooltips instead of plain text when form validation fails. We are currently using asp.net MVC 3 data annotation validators to display validation error messages. I am still fairly new to MVC and I have spent hours online looking for a clean solution

View 1 Replies

Maintain Scroll Position After Client-side Validation Fails?

Jun 29, 2010

I've got an ASP.NET webform with asp:TextBox and asp:RequiredFieldValidator at the bottom of the page. If client side validation fails on form submit - the page scrolls all the way up.

I'd like to maintain the scroll position on failed client-side validation.

View 1 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved