MVC :: Asp 2 And Client Validation For Boolean Fields
Apr 1, 2010
i am working an asp.net mvc 2 web app using model metadata, templates and client side validation using jquery. I have noticed that the boolean and datetime fields of my model are treated as required from the model metadata, even though i haven't applied any Required attribute on them. This is not a problem for server side validation, but when using the client side validation (<%Html.EnableClientValidation(); %>) on my edit model page, the validation fails and i cannot post the model changes. Specifically, when setting the boolean property to unchecked (false), the validation fails and the "Field is required" message appears.
The only workaround i have found so far is to override the default Editor templates for my models and write my own.
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Mar 21, 2011
How can I conditionally disable client-side validation of some fields ?
Here is the example of what I need to do:
user writes name and address and submits. Both are validated both server and client side. If validation passes e-mail is send to given address and (name, address) pair is stored.as a response same page is displayed (I don't want redirect!) this time with confirmation. User can retype their name and submit. In such case e-mail will be resend to the address that corresponds to given name.
It does not work because: client side validation will not pass when user clicks resent button on the second (confirmation screen). It would say that e-mail is required even if there is no field for it. How can I disable javascript validating email before the confirm page gets send to user ?
Example ASP.NET MVC page
<%if (Model.Confirm == false){ %>
<% using (Html.BeginForm()) { %>
Your email: <%: Html.EditorFor(m => m.Email) %>
Your name: <%: Html.EditorFor(m => m.Name) %>
<input type="submit" value="Send Email" />
[Code]....
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Dec 17, 2010
How do I implement client side validation for input fields that have been added to the form dynamically with javascript in an MVC 2 application?
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Oct 7, 2010
I am migrating my application to MVC3 and getting this error message Validation parameter names in unobtrusive client validation rules must start with a lowercase letter and consist of only lowercase letters or digits.How can I ovoid it without going and modifying all my ViewModels
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May 19, 2010
I am trying to create a custom password validation attribute which has these requirements
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2. doesn't contain space or other special chracters, which I'll define later.
3. length is between 6 - 12
[Code]....
it works fine on the server-side but I'd like to make this work on the client side as well, so I created a PasswordAttributeAdapter class
[Code]....
and in global.asax I added
[Code]....
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Dec 12, 2010
If I have something like the following:
<asp:TextBox id="test" runat="sever"></asp:TextBox>
<asp:RequiredFieldValidator runat="server" ControlToValidate="test"
ErrorMessage="Required"></asp:RequiredFieldValidator>
<asp:Label runat="server" id="lblStatus"></asp:Label>
if in the code behind, I set the label to "You must enter a value if the textbox is empty" to validate it on the server side and this is fine, but if javascript is enabled, I don't want to show the client side validation and the server side label together. Is this something where I would just have to disable the client-side validators if javascript was enabled?
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Jan 18, 2011
I'd like to implement ajax message box that will gather information from validators on a page when client-side validation fires. Like: I have left some text fields blank then press submit button and appropriate RequiredFieldValidators show messages. I would like my message box shows those messages too. I am looking for appropriate way to hook on validators JS event or something.
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Mar 2, 2011
I write a class inherited from ValidationAttribute such as
[//...]
public class MyValidation:ValidationAttribute
{
//...
}
but when I use MyValidation,and EnableClientValidation,I found that it would not create client script automatically .
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Jan 21, 2010
I use the oob client side validation from mvc 2 RC. The input field validation errors are working fine. But the validation summary is missing. How to get the validation summary on client side validation?
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Sep 8, 2010
When i use Validator callout extender and as well both client side java script validation , both are not working at a same time.I use java script code for dynamic checkboxes to be atleast one checkbox must be checked.When i use onclient click only javascript validations are fired, when use onclick function javascript code is not working.
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Jan 5, 2010
I'm currently trying to work through MVC validation, and am coming up against some problems where a field is required depending on the value of another field. An example is below (that I haven't figured out yet) - If the PaymentMethod == "Cheque", then the ChequeName should be required, otherwise it can be let through.
[Required(ErrorMessage = "Payment Method must be selected")]
public override string PaymentMethod
{ get; set; }
[Required(ErrorMessage = "ChequeName is required")]
public override string ChequeName
{ get; set; }
I'm using the System.ComponentModel.DataAnnotations for the [Required], and have also extended a ValidationAttribute to try and get this working, but I can't pass a variable through to do the validation (extension below)
public class JEPaymentDetailRequired : ValidationAttribute
{
public string PaymentSelected { get; set; }
public string PaymentType { get; set; }
public override bool IsValid(object value)
{
if (PaymentSelected != PaymentType)
return true;
var stringDetail = (string) value;
if (stringDetail.Length == 0)
return false;
return true;
}
}
Implementation:
[JEPaymentDetailRequired(PaymentSelected = PaymentMethod, PaymentType = "Cheque", ErrorMessage = "Cheque name must be completed when payment type of cheque")]
Has anyone had experience with this sort of validation? Would it just be better to write it into the controller?
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Sep 15, 2010
I'm trying to use jQuery validation for a dynamic form I'm setting up.
In some cases this form contains a set of input boxes which are suppose to total 100.
An example might be:
indicate what percentage of students are in each grade?
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Grade 10: TextBox2
Grade 11: TextBox3
Grade 12: TextBox4
I want to verify that TextBox1 + TextBox2 + TextBox3 + TextBox4 = 100%.
How do I go about this?
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Sep 6, 2010
want to know that can we validate a control which is out side a form element in asp.net(server side validation)and outside a form element in html(client side validation) let's take a closer look
<html>
<body>
<input type="text" name="first name"/>
</body>
</html>
can we apply clien side validation on above text box by java script ?in asp.net
<form runat="server">
</form>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
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Feb 24, 2011
Is it possible to do client side validation on a detailsview (insert or edit) without using validation controls? I.E. somehow capture the onClientClick event of the autogenerated Insert/Update link buttons to call my javascript function?
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Feb 23, 2010
I am using the CreateUserWizard in my VB.Net 3.5 web app. I added my own custom fields (First Name, Last Name...) to the form by using the CreateUserWizardStep and the CreateUserWizard1_CreatedUser event. Everything inserts fine into the aspnet_ tables and my own table. However, I cannot get the form validation to work. In other words, the form is ignoring the RequiredFieldValidators that I added.
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Mar 10, 2011
I'm working on a very dynamic site build at the moment. What I'm trying to do is creating something like a survey that can be created dynamically from a control panel. In the control panel you add input fields (these are saved in a database), what the user then see is a form that I generate from the database. So if I add 3 input fields to the database the survey will contain 3 fields. If I add 20 fields the survey will have 20 fields.
Now my problem is that I want to validate these fields, and I would like to be able to hook me in with the standard validation flow. I can't create a Model with validation rules since the number of fields and their names are dynamic the only thing I know is what kind of data that is expected in every field (this rule is found in the database). In an ordinary case I would get the automatic highlighted fields that are not valid and so on thanks to the built in validation flow with ValidationResult and so on.
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Mar 1, 2011
I'm interested in identifying a means to verify the server-side validation is performing as expected, but need to bypass the client-side validation being done using ASP.NET validation controls. To test this, I've tried using the form Poster add-on to Firefox that allowed me to get/modify the page contents and post it, but the .NET framework interpreted the submission as harmful and threw an application error ("A potentially dangerous Request.Form value was detected from the client").I've created a WinForm that includes a WebBrowser control and I'm able to manipulate the contents of the web page and invoke the button click, but am interested in seeing how to allow a postback with invalid input values. I don't want to assume the server-side validation works (even though I do check if Page.IsValid on the server on postback).This submits the web form in the WebBrowseer control and the expected client-side validation fires:
extendedWebBrowser1.Document.GetElementById(formButtonName).InvokeMember("click");
This is how I've manipulated some of the page contents (this just prevents submission):
mshtml.IHTMLDocument2 doc = extendedWebBrowser1.Document.DomDocument as mshtml.IHTMLDocument2;
string html = doc.body.innerHTML;
html.Replace("Page_ValidationActive = false", "Page_ValidationActive = true");
doc.body.innerHTML = html.ToString();
extendedWebBrowser1.Document.GetElementById(formButtonName).InvokeMember("click");
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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]....
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Aug 10, 2010
am trying to use JQuery validation plugin to validate some fields on one page.at page also has a link button which submits the page to server. Now the problem that I am facing is jQuery validator doesn't fire when I submit the page with that link button. If I change the link button to normal button or image button then validation works fine. I can't change the control on the page and have to use the link button.
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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.
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Mar 15, 2010
I'm using MVC 2 with some Models from a LinqToSql project that I built. I see that when I post back to a Controller Action after editing a form that has a DateTime field from the Model, the MVC Html.ValidationMessageFor() helper will nicely display an error beside the Date text box. This seems to happen automatically when the you test ModelState.IsValid() in the Controller Action, as if the MVC model binding automatically knows that the DateTime field cannot be empty.
My question is... I have some other string fields in these LinqToSql generated classes that are Not-Nullable (marked as Not Nullable in Sql Server which passes thourgh to the LinqToSql generated classes), so why doesn't Mr. MVC pick up on those as well and display a "Required" message in the ValidationMessageFor() placeholders I have added for those fields?
Sure, I have successfully added the MetadataType(typeof<t>) buddy classes to cover these Non-nullable string fields, but it sure does seem redundant to add all this metadata in buddy classes when the LinqToSql generated classes already contain enough info that MVC could sniff out. It MVC validation works with DateTime automatically, why not these Not-nullable fields too?
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Mar 2, 2011
I have a form where users enter their preferred contact method. It has:
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- a textbox for the user's email address
- a textbox for the user's phone number
I have validation via a custom attribute that verifies that if the user selected phone they entered a phone number, if they selected email they entered an email, etc... but it's at a class level on my ViewModel. As such the validation doesn't mark the expected field as invalid.
Is there a way that my IsValid override (or some other method) can mark the child property's value as invalid so I get highlighting?
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Nov 11, 2010
i want my gridview to be
1 - validate entries
2- check neccesary fields
before insertion or updation ?
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Jan 24, 2011
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<asp:Label ID="Label1" Visible="false" runat="server">secret info</asp:Label>
<input id="Text2" type="text" style="visibility:hidden;" value="secret 99" />
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Jul 10, 2013
When I Login the page using username and password  and then click the logout button and after again click Login button without entering username and password it will be login,I want to show error
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