Add Class To Textbox When Invalid Using .Net Validators?
Jun 15, 2010
I'm working on a multipage form in .Net using AJAX (UpdatePanels). I am stuck right now trying to get a class added to the textbox that is invalid to basically highlight it red.
I found a sample online using this code:
$("span.invalid").bind("DOMAttrModified propertychange", function (e) {
// Exit early if IE because it throws this event lots more
if (e.originalEvent.propertyName && e.originalEvent.propertyName != "isvalid") return;
var controlToValidate = $("#" + this.controltovalidate);
var validators = controlToValidate.attr("Validators");
if (validators == null) return;
var isValid = true;
$(validators).each(function () {
if (this.isvalid !== true) {
isValid = false;
}
});
if (isValid) {
controlToValidate.removeClass("invalid");
} else {
controlToValidate.addClass("invalid");
}
});
That works perfectly, in IE only. For some reason this code does not ever fire in Firefox. I've looked up the DOMAttrModified event and it sounds like this should work in Firefox, hence it being in the code. I must be missing something though because it does not work.
I'm open to other solutions for what I am trying to accomplish here if anyone has something good. Basically the form is 3 pages right now. Page 1 has a variable number of fields that require validation. It could be 5, or 13 fields, based on a checkbox. Page 2 has another set of fields that need to be validated separately. Obviously when I am on page 1 it should not try to validate page 2, and vice versa.
I have a textbox that I want the user to enter an integer in.1) I have created a required field validator, to ensure it is not left blank.2) A compare validator, to ensure the value entered is an integer using datatypecheck.3) A range validator to limit the range of the entered integer.If a letter is entered, instead of an integer, errors from both 2) and 3) are displayed.Is there a way to only show the error from 2) if a letter is entered and 3) if the integer is out of range - rather than both?
I have a page where I am using 2 update panels. The first update panel contains a form that has some validation tied to it. The second on has a simple form, but no validation. When I go to use the form in the second panel, the postback is halted by the validators in the first panel. Everything works as it should when I remove the validators.
I need to apply a css class to invalid controls on a web form. I'd like to make it a resusable class. This is what I have so far:
public class Validation { public static void ApplyInvalidClass(Page page, string className[code].....
The problem is what I call this on a .Net user control, I guess because I'm passing in Page, page.FindControl(bv.ControlToValidate) is always null.Is there a better way to do this?
im trying to dcreate a requiredfieldvalidator that only accept amount of money.
first i used this expresvalidator as it cant receive any letter.
<asp:RegularExpressionValidator ID="rvcheckno" runat="server" ErrorMessage="Amount receive numbers only!" ControlToValidate="tbamount" InitialValue="0" ValidationGroup="number"> </asp:RegularExpressionValidator> but then it also cant receive cent.
i was trying to do something that can accept 130.00
I have an ASP.net page with two textboxes where the user types in input. I applied a requiredfieldvalidator to both textboxes as well. However, I also want the textboxes to change to a backcolor of red if the form is invalid when the user clicks the button to submit the input. I tried this code below in tthe button click event, but doesnt work...
If Page.IsValid = False Then txtCosts.BackColor = Drawing.Color.Red txtRevenue.BackColor = Drawing.Color.Red End If
How else can I change the Backcolor of the textboxes when the input is invalid.......
I created a method in my class which will determine if an input is a numeric value or not.
Code:
[URL]
And even I input a numeric value in my entry, still I get the error message "Invalid entry". Can anyone from this community have an idea on how am I going to solve this issue.
I have a C# class from which I would like to access a string contained within a TextBox. The TextBox is defined in a an .ascx file. What headers should I put in the class to be able to access this TextBox string?
How to pass the textbox value to my controller there is no form and post method in the viewpage.I have taken one input type textbox which is not bind with my model.I need to access that value to controller
Is there a way to get the textbox text from another class?Class "Add_Project" is my aspx page, with a placeholder (phTemplate) and a button.Class GeneralInformation has a function which creates a textbox, which is put into a List of controls in class Template. Template is loaded into Add_Project.So when you hit the button in class add_project, I want to get the textbox text of txtProjectNumber.I hope you understand my issue.
I am having .aspx page in which there exists one textBox , label and one button. When user enter some name in textbox and then click button. The event handler of button should call function in class file(.cs). The function in .cs should retrieve value of textBox control and set it for label there. And return back.
In the example below I have set the control style to 'controlName' I want to use this class to define what my textbox looks like in edit mode. This works ok, so far so good. The Problem In a button event I add the class "validationError" to this textbox if the data is incorrect. When the grid gets rendered I expect to get 'controlName validationError as the class applied to the textbox. Unfortunately, it seems that the declarative statement overrides this and simply ends up as 'controlName' how I can intercept the application of the declarative class so that I get what I desire here?
can we use the same validator of a control for two different buttons, or do we need to write add a validator for each control for two different buttons.
I recently upgraded my web app to .net 4 and was surprised to see that the validator controls are no longer red. People are calling up all confused because they can't see the error messages now.Any idea how to fix this in one go? I know I can do a kludge like forecolor=red on every single validator control, but that's ugly. I don't want to go back to <pages controlRenderingCompatabilityVersion="3.5" /> because it's time to move forward, but I do want validator controls people can actually see.
I have a hyperlink on my master page that directs me to the homepage. It works on every page except a page that has validators.How do I make the hyperlink work?
Given an ASPX page with a textbox, a requiredfieldvalidator, and 2 buttons.If I want to only have the requiredfieldvalidator validate that data is in the textbox if button1 is clicked but not button2, is my only option to set EnableClientScript to false and do validation on the postback?Or have they implemented a way where you can still do the client side validation, but specify for it to only occur if button1 is clicked and not button2?
I have RemoteValidators working correctly on Html.BeginForm. However when I turn this from in Ajax.BeginForm and perform following:1. Type in Textbox whose viewModel Property is bound to a Remote Validator RC2 MVC3 2. Press Submit Button immediately.3. What I observe = data is saved before it the validation completes. 4. On Server UpdateModel works and it finds no issues (even though the remote Validator would have noticed the problem).
I can't seem to get any sort of validator to fire when validating my DropDownList. I just want to make sure that it isn't left at "--Select--" when the user presses the Add button on the page. I've tried a range validator and required field validator and neither seem to fire at all. My DropDownList contains ID which is an int that is hidden and Name which is a string that is displayed. The ID is -1 for "--Select--". I use these all the time and can't understand why the page in this new solution is any different from other solutions I have done in the past. What have I missed?
I have to validate that the year entered must be less than or equals to the current year. I am using server side validators in ASP.Net and C#, and all validators are inside a validator group.
Imagine the scenario of a contact form, whereby data is to be collected and further transmitted via email to the appropriate address. One of the important fields asks for an email address, pretty vital to instrumenting the call-back. So say I check for the entry of something, anything, in the mail address field using a RequiredFieldValidator; a further check in code will determine if the mail address supplied is usable, or not. Given that both of these checks are essentially validation, I would simply like to reuse the RequiredFieldValidator from my code-behind; is this possible? For example, something as simple as:
MyValidator.Show(); return;
What I have done in the past is add a Label to the form as well, and just use a similar tactic, only making the control visible as needs be and returning. Ideally I'd like to get rid of this altogether and simply use one control to output my error message. For an idea of current code, below is a skeletal listing, which, even as such, is the concept in its entirety: Within the page:
<asp:TextBox runat="server" ID="MailAddressTextBox" /> <asp:RequiredFieldValidator runat="server" ID="MailAddressValidator" ErrorMessage="Enter a valid mail address" ControlToValidate="MailAddressTextBox" /> <asp:Label runat="server" ID="MailAddressError" Text="Enter a valid mail address" Visible="false" /> And within the code-behind: MailAddress enquirerMail; try { enquirerMail = new MailAddress(MailAddressTextBox.Text); } catch { MailAddressError.Visible = true; return; }
The pitfall with the approach of hiding/showing error labels, other than the obvious of extra controls, is the maintenance of their visibility, and also a label for each error, or lists of messages and in-code alterations to the display.
Also, multiple validators is something I want to avoid, at least in this particular instance; a RegularExpressionValidator won't cut it here, as we all know just selecting the 'best' regex for parsing mail addresses can be a feat in itself, or maybe it will contain more characters than the actual page content + markup. Another reason for my aversion to regex, should you need one, is that, ultimately, I have to implement the above try/catch validation regardless, as even a 'validated' address may cause failure in the MailAddress constructor.
I am developing a web application where I would like to perform a set of validations on a certain field (an account name in the specific case). I need to check that the value is not empty, matches a certain pattern and is not already used. I tried to create a UserControl that aggregates a RequiredFieldValidator, a RegexValidator and a CustomValidator, then I created a ControlToValidate property like this:
public partial class AccountNameValidator : System.Web.UI.UserControl { public string ControlToValidate { get { return ViewState["ControlToValidate"] as string; } set { ViewState["ControlToValidate"] = value; AccountNameRequiredFieldValidator.ControlToValidate = value; AccountNameRegexValidator.ControlToValidate = value; AccountNameUniqueValidator.ControlToValidate = value; } } }
However, if I insert the control on a page and set ControlToValidate to some control ID, when the page loads I get an error that says Unable to find control id 'AccountName' referenced by the ControlToValidate' property of 'AccountNameRequiredFieldValidator', which makes me think that the controls inside my UserControl cannot resolve correctly the controls in the parent page.
So, I have two questions:
1) Is it possible to have validator controls inside a UserControl validate a control in the parent page?
2) Is it correct and good practice to "aggregate" multiple validator controls in a UserControl? If not, what is the standard way to proceed?
I am encountering issues in the navigation defined in a master page which are being blocked by validators pages that inherit from the master. How can I disable these validators so that they do not prevent my button actions in the master page?I am using AJAX controls in child pages.
i created 2 user controls and called them in two different tab panels.
each user control has few requiredfield validators.
aspx has one updatepanel and that updatepanel holds tabcontainer.
each tabpanel of above tabcontainer holds one user control and a button, so there are 2 tab panels to hold 2 user controls and 2 buttons.
<up> <tc> <tp1>[code].....
suppose i dont enter required fields in uc2 and navigated to tp1 n filled all the required fields of uc1 and clicked on bt1.here bt1 click event is not firing as requiredfield validators of uc2 are not passed.how do i make this work?requiredfield validators shud fire for that respective tab usercontrol only not for all the usercontrols.
