MVC :: Difference Between Model.IsValid And ModelState.IsValid?
Mar 17, 2011explain to me the difference between these two? I'm new to MVC and can't seem to find an explanation anywhere.
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MVC ModelState.IsValid Returning False?
May 21, 2010I am working in an ASP.NET MVC Application. I have a view model as follows:
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From UI Perspective user can enter date as mmddyyyy. And when user enters in such format 01012001, my ModelState.IsValid code piece in controller returns false. When I did a quick watch in ModelState, I see an error for the propery "SampleDate", saying "The Value 01012001 is not valid for SampleDate".
In my modelbinder, during the OnModelUpdated event I tried to format the value 01012001 to 01/01/2001 and assigned it back to SampleInterestViewModel.SampleDate thinking that ModelState.IsValid might return true without that error. But still ModelState.IsValid is false and I when I looked in to the ModelState dictionary, this particular property still has that errors in its collection.
Lastly I tried to format 01012001 and update the value 01/01/2001 directly to the Property SampleDate in the ModelState dictionary. But still ModelState.IsValid is false showing the same error for the SampleDate property. Can't figure out why ModelState.IsValid works and how and when it gets set to false.
If the User enter 01012001 in the UI, I still need to format it in the modelbinder to 01/01/2001 and make sure that ModelState.IsValid it true so that the rest of my controller code can work as expected. In the UI I am doing an AjaxSubmit to post the sampleDate value.
MVC :: ModelState.IsValid Check In Every Action?
May 19, 2010Is it necessary to do a ModelState.IsValid check at the top of every action? It seems that it is since the default model binder could make it invalid depending on the action parameters.
View 3 RepliesMVC :: TryUpdateModel Versus ModelState.IsValid
Feb 9, 2011The latest MVCSaffolding package uses "if (ModelState.IsValid)" prior to saving changes. In the past I have seen TryUpdateModel... used.
Is there a best practice?
C# - DropDownList Validation - ModelState.IsValid Is Always False / DropDownList Won't Be Validated
Feb 10, 2011I try to create a asp.net mvc 2 application.
My DropDownList won't be validated!
I have a core model class called Animal with some attributes and the same for the class Genus. These classes are mapped to nHibernate.
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MVC :: Model.IsValid Returning False - Certain Fields Don't Show Up On The Screen
Feb 24, 2011Model is coming up as Invalid Scenario is I have a custom ViewModel and certain fields don't show up on the screen (like Id & some computed fields etc..) so when the data gets posted back the Model.IsValid() comes to false Q Do I have to pre init these fields when I do create
ActionResult CreateOrder(int customerID)
{
var order=new OrderViewModel();
//shall I init the fields which are not being keyed in by the user?
}
C# - Page.IsValid Always Return False?
Aug 17, 2010I have cause validation true on button. And I am checking the Page.IsValid in c# code. But its always returning false value?
View 2 RepliesMVC :: ValidationAttribute.IsValid - ValidationContext Always Null?
Feb 17, 2010I'm using ASP.NET MVC 2 RC 2 (verified, the DLL has been signed on Friday, 29. January 2010 7:14:16 pm).
I created a custom validation attribute, which is described here (blog post is in German, however the code is not).
The problem is: that all works fine in theory (and unit tests). But by executing it in "the real world", which means firing off a form post to the server, it doesn't work. The commited validationContext is always null.
Is that a known issue? I would call that a real bug because it makes it impossible to use that method. And by using the other one I don't have access on the given context.
Web Forms :: How To Use Page.IsValid To Stop Processing
Feb 25, 2010I'm using CustomValidator with Page.IsValid=false but for some reason the FormView control still process the insertion.
View 10 RepliesC# - Page.IsValid Cannot Be Called Before Validation Has Taken Place?
Mar 18, 2011I am using a wizard control in which I have a next button that has causes validation = true. I also have a checkbox that when changed, in the event handler, I set causes validation = false for the next button. When that button is clicked - I get the following:
Page.IsValid cannot be called before validation has taken place. It should be queried in the event handler for a control that has CausesValidation.
Here is the code:
protected void chk_CheckChanged(object sender, EventArgs e)
{
CheckBox chk = (CheckBox)sender;
ImageButton ibtnStepNext = (ImageButton)(this.WizardSummaryTemplate.CustomNavigationTemplateContainer.FindControl("StepNextButton"));
ibtnStepNext.CausesValidation = (!chk.Checked);
}
What would be the recommended solution to disabling validation for the next button so I don't see this error?
Web Forms :: How To Popup A Message Box When Page.isvalid=false
Jul 26, 2010I want to pop up a message box when page.isvalid = false. How to do that?
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C# - PrinterSettings.IsValid Always Returning False On A Windows 2008 Server With IIS 7
May 21, 2010In our code, we have to give the users a list of printers to choose from. The user then chooses a printer and it is checked to verify it is valid before printing. On a windows 2003 server with IIS 6, this works fine. On a windows 2008 server with IIS 7, it fails each time impersonate is set to true.
PrinterSettings printerSetting = new PrinterSettings();
printerSetting.PrinterName = ddlPrinterName.SelectedItem.Text;
if (!printerSetting.IsValid)
{
lblMsg.Text = "Server Printer is not valid.";
}
else
{
lblMsg.Text = "Success";
}
Each time this code is run, the "Server Printer is not valid" displays, only if impersonate is set to true. If impersonate is set to false, the success message is displayed. The impersonation user has full rights to the printer. Is there a way to catch the actual reason the printer is not valid? Is there some other 2008 setting I should check? update I found that IsValid fails when the IIS7 application pools has "Enable 32-bit applications" is checked. This must be checked b/c we are using a 3rd party tool to print with, and it is a 32-bit application. It is not currently part of this test, so right now it is not causing this error.
Web Forms :: Validation Group Not Validating / Page.isValid Always Comes Back As True
Oct 14, 2010I am a bit baffled... I had my validation working fine till I added a validation group to it. Can someone tell me what i might be missing ? I'm at a loss... As I have another page doing the same thing and it works fine. Page.isValid always comes back as true.( I am just clicking on the button to make all the validation fire off.... )
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MVC :: Validation Attribute Fails With Deeper Objects IsValid Parameter Is Null?
Apr 9, 2010I have an CustomViewModel that is composed of three layers of objects.
The first one is to store and populate lists to be used in dropdowns.
The second one is to store additional propperties that I want.
And the third one is the model itself.
I create the view using View(new Layer(model))
And at the post i have ActionResult .... (Container container)
I made this architecture because i was having a lot of problems with model binder and enums...
So when i post to the form and the ModelBinder checks the validation attributes, the IsValid operation at the attribute X applied to the model class has its parameter value as null.
This behavior doesn't happen if I Just use the simple model to create and post the view.
What I have to do to get this work ?
I made a few changes to the AccountController to use it as sample here, here is the code:
[Code]....
Just change the register page to inherits from RegisterModelLayer.
When I post, the value parameter at the IsValid function at the PropertiesMustMatchAttribute class is null;
As a consequence i can't validate and get an null exception maybe.
AJAX :: MaskedEditValidator Page.IsValid Returns False When Using "en-UK" Culture?
Feb 4, 2011[Code]....
The following setup seems to work fine on the client side, however when I post back and check Page.IsValid, the value is false. I also looked at mevDate.IsValid and it's false. It seems that setting the CultulreName on the MaskedEditExtender is sufficient to get the MaskedEditValidator to emit the correct JavaScript, but on the server side of things it doesn't work. When I flip CultureName to "en-US" everything works as expected.
.net - Get A Difference Of Pending Changes To A Model In MVC 2?
Mar 26, 2011I am working on an ASP.Net MVC app and I want to show a confirmation page after the user edits some data. What I would like to show is a list of the pending changes that the user made to the model. For example, want to make the following changes:
FieldName:
Previous Value: XXX
New Value: YYY
I know I can read my stored value from the database and compare it with the POSTed object but I want this to work generally. What would be some good ways to approach this?
To clarify, I am looking for a general way to get a "diff" of the pending changes. I already know how to get the previous and pending changes. Kind of like how TryUpdateModel() can attempt to update any Model with posted values. I'd like a magical GetPendingModelChanges() method that can return a list of something like new PendingChange { Original = "XXX", NewValue = "YYY"} objects.
Modelstate Validation In Mvc 2.0?
Oct 29, 2010I have implemented customised registratio page by extending the membership provider using profile provider.I successfully registered the user .Now i want to validate the fields of registration page.Built-in Registration page has builtin validation messages.
Bu in my coding i am not passing model to the registration action, instead i am passing properties.So if i Use If(ModelState.IsValid) it is always gives true even i am not filling any fields .but after it throws an exception but not displaying error messages in the page.tell me what i have to do.How i am getting my validation messages.
I saw Account Models class in that for register Model built in validation conditions are there.So i am also writing like that for my properties.
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MVC :: Using ModelState With RedirectToAction?
May 18, 2010I have created a custom validation attribute for a class. The validation is actually against one property of the class, but since it needs to be compared to another property of the class at runtime, I had to pull in everything from the input form, perform the validation and output the errors. This being the case, I manually added a ModelError to ModelState if the ModelStats.IsValid returned false. I have another thread that goes into this, as I still haven't been able to make the client-side validation work for the custom validation (built-in validation runs client-side without a problem).
Here's the issue: I want to use the Post/Redirect/Get pattern to avoid issues where users refresh their page and cause another post of the form data. If I complete my Controller action and return a View after assigning an error with ModelState.AddModelError, I get the user feedback with the red input field and error message shown. However, just returning a View like this makes you vulnerable to the repeated posts issue. I want to use RedirectToAction to perform a get and avoid this problem, but when I do that I no longer have the ModelState error feedback on my rendered View. Here're the calls I'm making:
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I'd like to be able to redirect to a get action and retain the ModelState.
How To Add Errors To ModelState Using The Correct Key
Dec 15, 2010I want to perform some simple form validation in my controller.
Here's an excerpt from the controller action:
[code]....
It appears that must use a string as the error's key. Is there a way i can generate the corect key from the model, or should I just check for what input name Html.PasswordFor(x => x.NewPassword) returns?
MVC :: Datetime Format And Modelstate?
Aug 17, 2010I have textbox on my page as
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ADO.NET :: ModelState Has An Extra Key Which Is Empty ?
Sep 11, 2010I created a Model to do registration on my Website, and add some validations to it. When the user inputs a data, the data will be checked for validity using ModelState.IsValid. But when I input a correct data, it always be invalid. So I decided to debug my program and found that there are an extra key in my ModelState.
For my model, I have UserName, Email, Password, ConfirmPassword, SecretQuestion and SecretAnswer (6 elements)But when I debug, in ModelState, I found 7 elements, they are UserName, Email, Password, ConfirmPassword, SecretQuestion SecretAnswer and the last one is "".I don't know why there is an extra "" in my ModelState, and I checked that it was the source of my error.
Below I enclose my source to make it clearer
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[URL=http://img37.imageshack.us/i/errorvh.jpg/][IMG]http://img37.imageshack.us/img37/3415/errorvh.jpg[/IMG][/URL]
Showing Modelstate Errors While Using RenderPartialToString?
Apr 29, 2010Im using the following code:
[code]....
To return a partial view and a form through JSON. It works as it should, but as soon as I get modelstate errors my ValidationSummary does not show. The JSON only return the default form but it does not highlight the validation errors or show the validation summary.
Am I missing something?
This is how I call the RenderPartialToString:
string partialView = RenderPartialToString(this.ControllerContext, "~/Areas/User/Views/Account/ChangeAccountDetails.ascx", new ViewDataDictionary(avd), new TempDataDictionary());
MVC :: Modelstate Validation For Custom Control?
May 11, 2010I am creating a custom 'control' which is simply made of two html inputs [type=text] but can't figure out how the validation will work on the view end.
I want to treat these 2 inner controls as asingle control so when a error is added to modelstate both of these inputs are highlighted in the view and a single validation message is shown.
C# - Why A ModelState Error Being Added More That Once In MVC Website
Nov 16, 2010I have a rather complex model that I am using to render a form and perform validation using the model's meta information meta information.
The View Model has a list of child objects that are included in the form. the child objects are based on this:
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MVC :: Returning View When ModelState Not Valid
Feb 25, 2010I've written a View (form) that has a section with two radio buttons and a blank <DIV> block that will dynamically be updated. When one radio button is clicked, a <DIV> on the page is updated with fields specific to that radio button option. When the other radio button is clicked, the <DIV> on the page is updated with fields specific to that radio button option. To determine what content gets displayed when a radio option is selected, I call a JavaScript function and set the content appropriately using jQuery. Pretty easy so far. Let's assume that the User has toggled the radio buttons and filled in some data. Further down in the form, the User has entered an invalid e-mail address. When the User submits the View, the ModelState is invalid. If it is invalid, I return the View.
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Problem is, when the View is returned, some of the form fields (that are static) are in place. However, the <DIV> that was previously updated based on User radio button selections is reset to its original state. When we return a View because of an invalid Model State, is MVC smart enough to return the View in it's modified state (in this case, with the modified DIV and dynamically added content)?