I am creating one web application in which I am showing watermark text for some fields.
For example: I have one text box "Name" in which I am showing "Fill Name" as watermark. I have one required field validator for this text box. So, I am clearing the text box before the required field validator chck the text box other wise it will treat "Fill Name" as valid data and it will not apply validations. But when the validations fails, the watermark is not coming. Can we register some kind of callback method on asp.net validators?
I just want to run one java script function when asp.net validations fails.
Thanks
Ashwani
Have a look at the TextboxWatermarkextender from the AjaxControlToolkit. That controls fulfills all your described wishes. Have a look at the InitialValue property.
I got the solution for this.
function HookFunction() {
var Original_ValidatorUpdateDisplay = ValidatorUpdateDisplay;
ValidatorUpdateDisplay = function (val) {
Original_ValidatorUpdateDisplay(val);
if (val) {
val.style.display = val.isvalid ? "none" : "inline-block";
}
};
var Original_ValidatorSetFocus = ValidatorSetFocus;
ValidatorSetFocus = function (val, event) {
if (val) {
ClearWaterMarkText($('#' + $(val).attr('controltovalidate')));
}
Original_ValidatorSetFocus(val, event);
};
}
Related
What I would like to do is have the user add a new record to the database and popup a JQuery dialog confirming that the new record was saved. I thought this would be a simple exercise. I have a gridview bound to a LINQDataSource to allow the user to view and edit existing records and a textbox and a button to add new codes.
In the head of the document, I have the following:
$('#dialog').dialog({
autoOpen: false,
width: 400,
buttons: {
"Ok": function () {
$(this).dialog("close");
}
}
});
and futher down in the markup I have:
<div id="dialog" title="New Code Added">
<p>"<asp:Literal runat="server" ID="LiteralNewCode"></asp:Literal>" was successfully added.</p>
</div>
So when the user enters a new description and it passes all the validation, it's added to the database and the gridview is rebound to display the new record.
protected void ButtonSave_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
CCRCode.Add( <long list of paramters> );
GridCode.DataBind();
IsNewCode = true;
NewDescription = <new description saved to database>;
}
}
Now, here's where (I thought) I'd set a boolean property to indicate that a new description had been added as well as the text of the new description. See below:
protected bool IsNewCode
{
get { return ViewState["IsNewCode"] != null ? (bool)ViewState["IsNewCode"] : false; }
set { ViewState["IsNewCode"] = value; }
}
private string NewDescription
{
get { return ViewState["NewDescription"] != null ? ViewState["NewDescription"].ToString() : string.Empty; }
set { ViewState["NewDescription"] = value; }
}
Here's where I loose my way. My guess is I want to add functionality to include code similar to:
$('#dialog').dialog('open');
I've added a registerscriptblock method in the page_load event but that didn't work. Any ideas? Or am I just going about this entirely wrong?
Thanks.
Not really get what you want to do. But, i use jquery alot with .NET in my projects. here is how i do, probably could give you a hint.
foo.aspx.cs
public String ScriptToRun = "$('#dialog').dialog('open');";
change the value of ScriptToRun in your C# code
foo.aspx
$(document).ready(function() {<%=ScriptToRun %>});
Remember that whatever you done in backend is going to generate HTML, Css& javascript to browser.
Two ways: one, write the javascript in your server-side code. Or, define a JS method to show the dialog (say named showDialog), and call it via:
Page.ClientScript.RegisterStartupScript(... "showDialog();" ..);
RegisterStartupScript puts the method call at the end, ensure your script is above it to work. You can also wrap it with document.ready call too, to ensure JQuery is properly loaded.
I think that the only think that you have miss is the creation of the dialog when the Dom is ready.
$(document).ready(function() {$('#dialog').dialog('open');});
I posted code in a different question for a custom "MessageBox" class I wrote:
ASP.NET Jquery C# MessageBox.Show dialog uh...issue
the code by default uses the javascript alert() function, but you can define your callback so that it calls your custom javascript method to display the messages.
I have this code for Form Submit..
<input type="submit" runat="server" id="buttonSubmit" value="Add" style="width:100px;" />
My BeginForm is like this..
<% using (Html.BeginForm("Insert", "StudentController", FormMethod.Post, new { #id = "exc-" }))
{%>
I have one textbox in my view I need to check my textbox is empty or not if it is Empty display alert box saying please Enter some value in textbox
other wise go to controler..
Please any body help me out?
thanks
You can do this many ways, but possibly the cleanest is to use Data Annotations on your ViewModel. For example -
public class MyViewModel
{
[Required]
public string MyProperty { get; set; }
}
Now in your View use
<% Html.EnableClientValidation(); %>
just before you start the form. This will cause a JavaScript object to be emitted in the markup sent to the client. The script looks like this example
<script type="text/javascript">
//<![CDATA[
if (!window.mvcClientValidationMetadata) { window.mvcClientValidationMetadata = []; }
window.mvcClientValidationMetadata.push({"Fields":[{"FieldName":"FirstName","ReplaceValidationMessageContents":true,"ValidationMessageId":"FirstName_validationMessage","ValidationRules":[{"ErrorMessage":"The First Name field is required.","ValidationParameters":{},"ValidationType":"required"}]},{"FieldName":"LastName","ReplaceValidationMessageContents":false,"ValidationMessageId":"LastName_validationMessage","ValidationRules":[{"ErrorMessage":"The Last Name field is required.","ValidationParameters":{},"ValidationType":"required"}]},{"FieldName":"EmailAddress","ReplaceValidationMessageContents":false,"ValidationMessageId":"EmailAddress_validationMessage","ValidationRules":[{"ErrorMessage":"The Email Address field is required.","ValidationParameters":{},"ValidationType":"required"}]},{"FieldName":"ZipCode","ReplaceValidationMessageContents":false,"ValidationMessageId":"ZipCode_validationMessage","ValidationRules":[{"ErrorMessage":"Zip Code must be 5 character long.","ValidationParameters":{"minimumLength":0,"maximumLength":5},"ValidationType":"stringLength"},{"ErrorMessage":"Zip Code must be five digits.","ValidationParameters":{"pattern":"\\d{5}"},"ValidationType":"regularExpression"},{"ErrorMessage":"The Zip Code field is required.","ValidationParameters":{},"ValidationType":"required"}]}],"FormId":"form0","ReplaceValidationSummary":false,"ValidationSummaryId":"valSumId"});
//]]>
</script>
This object contains validation metadata that can be used by a client side validation plugin to hook up validation on the client side. The plugin that comes with ASP.NET MVC 2 is the Microsoft AJAX validator and you will need to include these scripts in the page to use the validation (MicrosoftAjax.js, MicrosoftMVCAjax.js and MicrosoftMvcValidation.js in that order).
Alternatively, if you're more comfortable with jQuery, you can get a script in the MvcFutures source that hooks the validation into the jQuery validate plugin (this isn't a fully fledged script and is missing a few pieces, such as getting client side validation summaries). The script is MicrosoftMvcJQueryValidation.js and you can get it here
The advantage of using Data Annotations is that you get the server side validation too and your client and server side validation will validate for the expected values. Also, the Data Annotations allow you to set Error Messages and names for the field labels from the attributes (error messages and display names* can also come from resource files)
*Because MVC2 was compiled against .NET 3.5 version of Data Annotations, display name cannot be set from resource files. There is a workaround to this - DisplayName attribute from Resources?.
NOW THE EASY WAY
Just set up a submit event handler on the form
var form = document.getElementById('exc-');
var oldSubmit = form.onsubmit || function() {};
form.onsubmit = function() {
var input = document.getElementById('myinput');
if (input.value === '') {
alert('please Enter some value in textbox');
return false;
}
oldSubmit();
}
or with jQuery
$('#exc-').submit(function() {
if ($('#myinput').val() === '') {
alert('please Enter some value in textbox');
return false;
}
});
I have a partial view that is rendered within a main view. The partial view takes advantage of System.ComponentModel.DataAnnotations and Html.EnableClientValidation().
A link is clicked, and div containing the partial view is displayed within a JQuery.Dialog().
I then click the save button without entering any text in my validated input field. This causes the client side validation to fire as expected, and display the '*required' message beside the invalid field.
When the cancel button is clicked, I want to reset the client side MVC validation back to it's default state and remove any messages, ready for when the user opens the dialog again. Is there a recommended way of doing this?
This answer is for MVC3. See comments below for help updating it to MVC 4 and 5
If you just want to clear the validation-messages so that they are not shown to the user you can do it with javascript like so:
function resetValidation() {
//Removes validation from input-fields
$('.input-validation-error').addClass('input-validation-valid');
$('.input-validation-error').removeClass('input-validation-error');
//Removes validation message after input-fields
$('.field-validation-error').addClass('field-validation-valid');
$('.field-validation-error').removeClass('field-validation-error');
//Removes validation summary
$('.validation-summary-errors').addClass('validation-summary-valid');
$('.validation-summary-errors').removeClass('validation-summary-errors');
}
If you need the reset to only work in your popup you can do it like this:
function resetValidation() {
//Removes validation from input-fields
$('#POPUPID .input-validation-error').addClass('input-validation-valid');
$('#POPUPID .input-validation-error').removeClass('input-validation-error');
//Removes validation message after input-fields
$('#POPUPID .field-validation-error').addClass('field-validation-valid');
$('#POPUPID .field-validation-error').removeClass('field-validation-error');
//Removes validation summary
$('#POPUPID .validation-summary-errors').addClass('validation-summary-valid');
$('#POPUPID .validation-summary-errors').removeClass('validation-summary-errors');
}
I hope this is the effect you seek.
If you are using unobtrusive validation that comes with MVC you can simply do:
$.fn.clearErrors = function () {
$(this).each(function() {
$(this).find(".field-validation-error").empty();
$(this).trigger('reset.unobtrusiveValidation');
});
};
------------------------------------------------------------------------
Third Party Edit:
This mostly worked in my case, but I had to remove the $(this).find(".field-validation-error").empty(); line. This appeared to affect the re-showing of the validation messages when resubmitting.
I used the following:
$.fn.clearErrors = function () {
$(this).each(function() {
$(this).trigger('reset.unobtrusiveValidation');
});
};
and then called it like this:
$('#MyFormId input').clearErrors();
function resetValidation() {
$('.field-validation-error').html("");
}
You can simply define a new function in jQuery:
$.fn.resetValidation = function () {
$(this).each(function (i, e) {
$(e).trigger('reset.unobtrusiveValidation');
if ($(e).next().is('span')) {
$(e).next().empty();
}
});
};
and then use it for your input fields:
$('#formId input').resetValidation();
Thank you. I had a similar question for a slightly different scenario. I have a screen where when you click one of the submit buttons it downloads a file. In MVC when you return a file for download, it doesn't switch screens, so any error messages which were already there in the validation summary remain there forever. I certainly don't want the error messages to stay there after the form has been submitted again. But I also don't want to clear the field-level validations which are caught on the client-side when the submit button is clicked. Also, some of my views have more than one form on them.
I added the following code (thanks to you) at the bottom of the Site.Master page so it applies to all of my views.
<!-- This script removes just the summary errors when a submit button is pressed
for any form whose id begins with 'form' -->
<script type="text/javascript">
$('[id^=form]').submit(function resetValidation() {
//Removes validation summary
$('.validation-summary-errors').addClass('validation-summary-valid');
$('.validation-summary-errors').removeClass('validation-summary-errors');
});
</script>
Thanks again.
You can tap into the validation library methods to do this.
There are two objects of interest: FormContext and FieldContext. You can access the FormContext via the form's __MVC_FormValidation property, and one FieldContext per validated property via the FormContext's fields property.
So, to clear the validation errors, you can do something like this to a form:
var fieldContexts = form.__MVC_FormValidation.fields;
for(i = 0; i < fieldContexts.length; i++) {
var fieldContext = fieldContexts[i];
// Clears validation message
fieldContext.clearErrors();
}
// Clears validation summary
form.__MVC_FormValidation.clearErrors();
Then, you can hook that piece of code to whichever event you need.
Sources for this (quite undocumented) insight:
http://bradwilson.typepad.com/presentations/advanced-asp-net-mvc-2.pdf (Mentions FieldContext)
https://stackoverflow.com/a/3868490/525499 (For pointing out this link, which metions how to trigger client-side validation via javascript)
In order to complete clear the validation artifacts including the message, the coloured background of the input field, and the coloured outline around the input field, I needed to use the following code, where this was (in my case) a Bootstrap modal dialog containing an imbedded form.
$(this).each(function () {
$(this).find(".field-validation-error").empty();
$(this).find(".input-validation-error").removeClass("input-validation-error");
$(this).find(".state-error").removeClass("state-error");
$(this).find(".state-success").removeClass("state-success");
$(this).trigger('reset.unobtrusiveValidation');
});
Here you can use simply remove error message
$('.field-validation-valid span').html('')
OR
$('.field-validation-valid span').text('')
I've this issue for "Validation summery" after form ajax submit and done it like this:
$form.find('.validation-summary-errors ul').html('');
and complete code is:
$("#SubmitAjax").on('click', function (evt) {
evt.preventDefault();
var $form = $(this).closest('form');
if ($form.valid()) {
//Do ajax call . . .
//Clear validation summery
$form.find('.validation-summary-errors ul').html('');
}
});
Is it possible to have two ValidationSummary controls. One to display popup errors for some fields and one to display the standard summary for other fields?
Thanks
Yes, you can group validation using the ValidationGroup property on the form controls and the Summary control.
EDIT:
Using jQuery you could do something like this:
var validators = jQuery('.dataEntryFormTable').find("span[controltovalidate]");
validators.each(function()
{
var validatorEnabled = true;
if (jQuery('#' + this.id).attr('enabled') == false) {
validatorEnabled = false;
}
if (validatorEnabled)
{
// Check if Valid
// then Get Mesage Text, assign to list of messages to display
}
}
I am trying to disable validators using jquery.
I have already looked
Disable ASP.NET validators with JavaScript
and couple of others doing the same.
It seems ot be working but its breaking.
My code:
$('.c_MyValdiators').each(function() {
var x = $(this).attr('id');
var y = document.getElementById(x);
ValidatorEnable(y[0], false);
});
I get Error:
val is undefined
[Break on this error] val.enabled = (enable != false);\r\n
Alternatively if I use
$('.c_MyValdiators').each(function() {
ValidatorEnable($(this), false); OR ValidatorEnable($(this[0]), false);
});
I get Error:
val.style is undefined
[Break on this error] val.style.visibility = val.isvalid ? "hidden" : "visible";\r\n
Any idea or suggestions?
I beleive that ValidatorEnable takes the ASP.net ID rather that the ClientID produced by ASP.net. You will also need to make the validation conditional in the CodeBehind.
here is an example:
Of particular use is to be able to enable or disable validators. If you have validation that you want active only in certain scenarios, you may need to change the activation on both server and client, or you will find that the user cannot submit the page.
Here is the previous example with a field that should only be validated when a check box is unchecked:
public class Conditional : Page {
public HtmlInputCheckBox chkSameAs;
public RequiredFieldValidator rfvalShipAddress;
public override void Validate() {
bool enableShip = !chkSameAs.Checked;
rfvalShipAddress.Enabled = enableShip;
base.Validate();
}
}
Here is the client-side equivalent:
<input type=checkbox runat=server id=chkSameAs
onclick="OnChangeSameAs();" >Same as Billing<br>
<script language=javascript>
function OnChangeSameAs() {
var enableShip = !event.srcElement.status;
ValidatorEnable(rfvalShipAddress, enableShip);
}
</script>
Reference: http://msdn.microsoft.com/en-us/library/aa479045.aspx
I just stumbled upon your Question [a year later].
I too wanted to disable all validators on a page using JQuery here is how I handled it.
$('span[evaluationfunction]').each(function(){ValidatorEnable(this,false);});
I look for each span on the page that has the evaluatefunction attribute then call ValidatorEnabled for each one of them.
I think the $('this') part of your code is what was causing the hickup.
ValidatorEnable(document.getElementById($(this).attr('id')), true);
I've got another solution, which is to use the 'enabled' property of the span tag for the validator. I had different divs on a form that would show or hide so I needed to disable the validation for the fields inside the hidden div. This solution turns off validation without firing them.
If you have a set of RequiredFieldvalidator controls that all contain a common string that you can use to grab them the jquery is this:
$("[id*='CommonString']").each(function() {
this.enabled = false; // Disable Validation
});
or
$("[id*='CommonString']").each(function() {
this.enabled = true; // Enable Validation
});
Hope this helps.
John
I'm just running into the same problem, thanks to the other answers, as it helped uncover the problem, but they haven't gone into detail why.
I believe it is due to that ValidatorEnable() expects a DOM object (i.e. the validation control object) opposed to an ID.
$(selector).each() sets "this" to the DOM element being currently iterated over i.e. quoted from the jquery documentation:
"More importantly, the callback is fired in the context of the current
DOM element, so the keyword this refers to the element." - http://api.jquery.com/each/
Therefore you do not need to do: document.getElementById($(this).attr('id')
And instead ValidatorEnable(this, true); is fine.
Interestingly, Russ's answer mentioned needing to disable server side validation as well, which does make sense - but I didn't need to do this (which is concerning!).
Scrap my previous comment, it is because I had my control disabled server-side previously.
The ValidatorEnable function takes an object as the 1st parameter and not a string of the id of the object.
Here is the simple way to handle this.
Add a new class to the Validation control.
Then look for that class with jquery and disable the control.
Example :
if (storageOnly == 1)
{
$('#tblAssignment tr.assdetails').addClass('hidden');
$('span[evaluationfunction]').each(function ()
{
if ($(this).hasClass('assdetail'))
{ ValidatorEnable(this, false); }
});
}
else
{
$('#tblAssignment tr.assdetails').removeClass('hidden');
}
* Works like a charm.
** For you imaginative types, assdetail == assignment detail.
Here depending on the if condition, I am either hiding the rows then disabling the validator , or removing hidden class from the rows..
Various ways to this depending on your needs. Some solutions in the following blog posts:
http://imjo.hn/2013/03/28/javascript-disable-hidden-net-validators/
http://codeclimber.net.nz/archive/2008/05/14/How-to-manage-ASP.NET-validation-from-Javascript-with-jQuery.aspx