Web Forms :: Adding Client Side Validation In Code Behind?
May 21, 2010
I am having issues correctly setting up reference to javascript code to a custom validator.This is my javascript code in the .aspx page.
[Code]....
And here is where I add the Client Validation to the customer validator in the code behind.
[Code]....
The validation is if there is a value present in the first text box then the second text box is required.The page throws an error when the validation should fail, but if I ignore the error the validation works correctly.Do I need to move my javascript to the code behind as well?
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Sep 8, 2010
let me knw abt the validations in asp.net...
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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 23, 2011
I have a text box in which I want only digits (either decimal or whole numbers). I have applied Required Field Validator and Regular Expression Validator on it.I have an Image Button, by clicking on which, I want this validation to be performed. But when I build the code, and clicks on Image Button, these validators do not work and I am redirected to the server side method of Image Button and after completing the execution of server side method, control comes to these validators and client side validation executes.I am fed up by finding solutions on Google and unable to find any solution.Please tell me of anyone of you know the solution that why server side code is running first and client side validation is executing after server side code execution.
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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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Jan 6, 2010
If I have a standard HTML textbox
[Code]....
but got a readonly error.
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Aug 12, 2010
I'm using an entity model with metadata annotations. My controller method looks like this...
if (!ModelState.IsValid)
{
return View(model);
}
else
{
UpdateModel(model);
repo.Save();
return RedirectToAction("Index");
}
If I enable client side validation in the view I'll get the error per the Attributes from the metadata class. If I take clientside validation out, error gets thrown from saving to the DB rather than return the view with an Error Summary.
This is the top portion of my view....
<% using (Html.BeginForm())
{%>
<%: Html.ValidationSummary(true) %>
I've tried running without debugging (ctrl + f5) in debug and release mode as well as setting breakpoints and Debugging (f5) but it just seems weird to get Client side validation without server side validation. What am I missing here?
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May 19, 2010
I am trying to create a custom password validation attribute which has these requirements
1. cannot be empty.
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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May 24, 2010
I have Two asp.net Textbox In 1st Textbox Contain ForExample:- 3000 it may be anything,
and 2nd Textbox Will enter by user... What i need is whenever user enter below 3000 or equal to 3000 then itz ok message will display otherwise if 2nd textbox values goes to 3001.. then i need to show a message in client side itself... Plz check Quantity message...
i have tried comparefield validator with lessthenorequal itz not working...
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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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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 14, 2010
I have a custom control which I need to be able to operate with the validation controls available within asp.net. I would like the message to be shown to the user client-side so as not having to wait for a postback each time.I have the ValidationPropertyAttribute("value") set at the top of the control. However it is still being completely ignored by the validation controls. I have found the following from microsoft, but I'm not sure I'm interpreting it correctly, could someoneIn order to be referenced by a validation control, a control must have a validation property. All controls that can be validated have a ValidationPropertyAttribute, which indicates which property should be read for the purposes of validation. If you write your own control, you can make it take part in validation by providing one of these attributes to specify which property to use.
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Mar 11, 2011
I want to be able to do something like display an image for required fields. If the field is filled in and passes validation, the image is replaced with another image. If the field is not filled in or is filled in incorrectly, I want the initial image to replaced by still another. For example, the initial image can be a red star. A green check mark can be the image for a valid field, and a red "X" can be the image for a missed or invalid field.
Another post pointed me to [URL] which seemed to contain my anwer in the Bypassing Client Validation / Special effects section, but it only works in IE!
Doing all my own client side validation is not a good alternative. Does anyone know how I can style anything other then the input control (or the validation controls) when the input control fails to validate and before the postback?
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Mar 20, 2010
I have 4 forms in my asp.net mvc view.I have enabled client side validation on each by put <% Html.EnableClientValidation(); %> Above Html.BeginForm()of each form.The issue is that regardless of the fact that I've specified ID's for the forms the first form on the page gets validated whenever I click submit of the other forms.
Is this usage supported?
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May 18, 2010
in a form i have a buttoin, when click both OnclientClick and postback should happen. on clicking the "Email" button a client side "mailto" tag should do the work and pull a new message window on the client's machine.
whereas, the email addresses should be invoked by the post back. so , when clicking the button the server side post should happen and on return the client side script should be invokded with the values read during post back, and populate all the email addresses.
i need know how to first do a server hit take the values and then execute the client script with those values without using AJAX
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Jan 6, 2010
If I have a standard HTML textbox: I can retrieve the value using Request.Form. But how do I go about populating this textbox from the server-side? I tried Request.Form["txtTest"] = "blah"; but got a readonly error.
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Feb 2, 2011
I have a datalist on my page that allows a user to build up with orders. Each time an order is added I post back to the server, updated a dataset and then bind the dataset to the datalist.
I would rather do this on the client, for performance reasons.
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Aug 10, 2010
I am unable to firgure out what is referred to by "Northwind.ProductsRow" in the following code snipet:
[Code]....
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Feb 25, 2012
I have a textbox where data will be entered by user without any postback. I need to add the data to a variable or any hidden variable or i need to store data from all the controls on th epage in which user entered to a variable this controls in which user enters the data becomes visible on button click i mean a post back happen...
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Jun 28, 2010
<asp:RadioButtonList ID="rbEmployeeGroup" runat="server" RepeatDirection="Horizontal"
AutoPostBack="true" OnSelectedIndexChanged=" [Call java script to check first] then rbEmployeeGroup_SelectedIndexChanged">
<asp:ListItem Selected="True" Text="Employees" Value="employees"></asp:ListItem>
<asp:ListItem Text="Groups" Value="groups"></asp:ListItem>
</asp:RadioButtonList>
How to call the javascript function before call bEmployeeGroup_SelectedIndexChanged this code behind function?
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Dec 9, 2010
Is there any way to add a confirmation dialog to a submit button when the form already has other validation controls and a summary control using "showmessagebox=true"? I tried adding
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Mar 17, 2011
I have in the fact copied the code of Login page in the ASP.NET MVC application template (provided with VS). In the original template, client side validation is working but when I copy all the connected code I get only server side validation (no red fields, post back even if data are incorrect).
public class LogOnModel {
[Required]
[Display(Name = "User name")]
public string UserName { get; set; }
[Required]
[DataType(DataType.Password)]
[Display(Name = "Password")]
public string Password { get; set; }
[code]...
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