MVC :: Model.IsValid Returning False - Certain Fields Don't Show Up On The Screen
Feb 24, 2011
Model 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?
}
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May 21, 2010
I am working in an ASP.NET MVC Application. I have a view model as follows:
[code]....
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.
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May 21, 2010
In 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.
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Mar 17, 2011
explain 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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Aug 17, 2010
I have cause validation true on button. And I am checking the Page.IsValid in c# code. But its always returning false value?
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Jul 26, 2010
I want to pop up a message box when page.isvalid = false. How to do that?
[code]....
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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.
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Feb 10, 2011
I 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.
[code]....
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Oct 28, 2010
Is there a way to return to the previous view without having to record all the parameters that were used to get to the view in question. Consider this situation. You have a search screen with input parameters, you press search and get results displayed on the page. You click on one item to get a detailed look which redirects you to a new view. Does MVC have the ability to get the previous query string that contains the search parameters?
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Jun 25, 2010
Somehow my onclientClick is not returning the value false correctly. I am trying to prevent the user from clicking on the button. How ever user can click on it first time in this case. I am looking to turn off my LinkButton's Click event, by setting it to false. How would I do this? Somehow returning false doesn't cancel the event.
[Code]....
C# Code
[Code]....
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Nov 21, 2010
I am trying to delete an asp.net user from all tables. When I call: bool isDeleted = Membership.DeleteUser(username, true); isDeleted is being set to false; Is there a way to tell why it is not deleting the user?
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Mar 15, 2010
My ASP.NET app is using windows authentication. If I run the following code:
WindowsIdentity wi = (WindowsIdentity)User.Identity;
foreach (IdentityReference r in wi.Groups)
{
ListBox1.Items.Add(r.Translate (typeof (NTAccount)).Value);
}
if (User.IsInRole ("Everyone"))
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Nov 6, 2013
I'm having trouble getting selected rows in asp.net. i tried to debug it and found out that the answer to "chkRow.Checked" is always false eventhough it is selected. I'm new to asp.net.here is my code.
Protected Sub btnApproveYes_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnApproveYes.Click
Dim modID As String = String.Empty
For Each row As GridViewRow In gvModule.Rows
[Code]......
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Mar 25, 2011
I have a view which contains input fields based on 2 models. The first is a basic info model and the rest of the fields are based on a list on my other model type. To encompass the 2 types of model, I have a container parent view model and in my view I'm using "RenderPartial" to display the relevant fields. the container parent view model is similar to:
[Code]....
When I submit the form I'm successfully getting my main summary model and the list of data models:
[Code]....
so, up until here all seems ok. Now, these 2 view models are linked to data layer models which in turn link to 3 tables in my db (each summary data model contains an instance of a 3rd model) what I want to know is, what is the best way of inserting the data into my db which caters for any failure without losing database integrity. The insert flow will be somthing like:
1. Insert Summary Model to DB - returning ID
2. Insert Container model (which links summary to the data) and return id
3. For each summary data model in this container, add the data (using the container model id in step 2).
I am using the entity framework. normally, i'd have a single routine using a data layer version of my container parent view model which does the insert in a single method. i'd use a connection transaction so that i could rollback if needed.
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Sep 29, 2010
I have a web page with a form in the footer, when the user clicks submit in this form I submit their data and then return the view with the model with the line
[Code]....
but this means that the user is at the top of the page and cannot immediately see the validation errors or success message on that page as this information is posted in the footer section so is there a way to return a view with the model and a html fragment so the url is http://website/page#footer so that they can see this straight away without having to scroll down.
Also I have to assume the user has javascript turned off and the user could be using browsers ie6 and greater.
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Aug 12, 2010
I have a partial view (an ascx page (see below)) that is used on every page on my site. Its basically a form, when the user hits submit I need it to call a procedure in one of my controllers and then return the page the user was on.
[Code]....
Public Function TalkToUs(ByVal customer As Customers) As PartialViewResult
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Jan 7, 2011
I'm not entirely sure which forum this belongs in. It works with both my ASP.NET form and my SQL DB.
Okay, I built an application from scratch a couple years ago and am trying to add some functionality so I don't have to do so much manual work.
I have two relevant tables, tableClasses and tableStudent2Class
Classes have 4 possible sessions that are available. These are bin fields which I mark as true if they're available for registration. There are upwards of 40 different classes that are available. Each class has a defined number of slots available (an int field).
The tableStudent2Class connects the tableStudents to tableClasses. There are three fields: classID, classSessionNumber, and studentGUID.
Now, is there some way to make the DB and/or form change the available bin fields to false when they receive a certain number of registrations?
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Apr 5, 2010
Once again i am faced with an issue. I must allow a user to add as many pieces of data as they wish. I have therefore employed some javascript from an tutorial
[URL]
I would now like to return the data from the dynamic fields through the c#(.cs page)
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Aug 19, 2010
When adding a stored procedure into the Entity Data Model I can select whether the procedure returns a scalar, a (new) complex type or one of the entity types I already defined.I mean assuming I have a view like this
CREATE VIEW FilteredFoos as SELECT Foo.* FROM Foo join ... WHERE ...(that is a view that implements some involved filtering, but returns all columns from one table) how do I add it to the project so that I can use the entity set, but get the Foo objects, not some new FilteredFoo objects.
var foos = myDB.FilteredFoos.Include("Bar").ToList();
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Oct 27, 2010
I have a problem with passing a model to a controllerIn my controller I have a HttpPost function that gets a EF model.The problem is that the form does not contains all properties of the EF model.When the function is called that gets this EF model, I get error messge of fields that are not nullable in the EF model.That's because the fields are not in the form, so the not nullable properties gets no value.
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Apr 15, 2010
I have a problem that in DetailsView Edit Mode, if I go to edit fields, and set a fields visible property to false, when I update the record through the built in update options it sends a null value. If I change the field back to visible, it passes the data just fine.
Consequently, I tried just setting the field to Read Only = True, and got the same result even though the current values do show up in the edit mode, just read only.Is there anyway to hide the field but still allow it to pass the data it currently has "BACK" into the record.
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May 20, 2010
I have an Objectdatasource configured with Select, Insert, Update & Delete queries in a Dataset. This datasource is linked to my Gridview. I do not require all fields in the table to be displayed or updated in my grid so i have turned off the Visible property on several.
However, when i go into Edit mode and trigger the UPDATE to the database table, i get NULL values updated in the columns i set False for the Visible property.
How can i remove these columns from the GridView and the Edit mode and still have them UPDATE with their current values instead of being overwritten with NULL's?
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Dec 26, 2010
One of the fields on the view does not have a label when i ran the project, although the other fields got labels and the following HTML code to generate the label already exists:-
<%: Html.LabelFor(model => model.Article_Type_ID) %>
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Jan 17, 2010
By picking MVC for developing our new site, I find myself in the midst of "best practices" being developed around me in apparent real time. Two weeks ago, NerdDinner was my guide but with the development of MVC 2, even it seems outdated. It's an thrilling experience and I feel privileged to be in close contact with intelligent programmers daily. Right now I've stumbled upon an issue I can't seem to get a straight answer on - from all the blogs anyway - and I'd like to get some insight from the community. It's about Editing (read: Edit action). The bulk of material out there, tutorials and blogs, deal with creating and view the model.
So while this question may not spell out a question, I hope to get some discussion going, contributing to my decision about the path of development I'm to take. My model represents a user with several fields like name, address and email. All the names, in fact, on field each for first name, last name and middle name. The Details view displays all these fields but you can change only one set of fields at a time, for instance, your names. The user expands a form while the other fields are still visible above and below. So the form that is posted back contains a subset of the fields representing the model. While this is appealing to us and our layout concerns, for various reasons, it is to be shunned by serious MVC-developers.
I've been reading about some patterns and best practices and it seems that this is not in key with the paradigm of viewmodel == view. Or have I got it wrong? Anyway, NerdDinner dictates using FormCollection och UpdateModel. All the null fields are happily ignored. Since then, the MVC-community has abandoned this approach to such a degree that a bug in MVC 2 was not discovered. UpdateModel does not work without a complete model in your formcollection. The view model pattern receiving most praise seems to be Dedicated view model that contains a custom view model entity and is the only one that my design issue could be made compatible with.
It entails a tedious amount of mapping, albeit lightened by the use of AutoMapper and the ideas of Jimmy Bogard, that may or may not be worthwhile. He also proposes a 1:1 relationship between view and view model. In keeping with these design paradigms, I am to create a view and associated view for each of my expanding sets of fields. The view models would each be nearly identical, differing only in the fields which are read-only, the views also containing much repeated markup. This seems absurd to me. In future I may want to be able to display two, more or all sets of fields open simultaneously.
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Jul 19, 2010
So i'm working on the form that i started MVC with - the problem is that i'm NOT using a ViewModel for the view, its an actual Linq to SQL object. And so far it works fine. This form is a beast and id rather not refactor it to use viewmodels....
My big problem now is that depending some condition, i pretty much set almost everything to disabled when a particular dropdown is selcted (to mimic a deactivated state) - when the user hits submit, the model fields are now null, even tho you can see them filled in (just greyed out and unselectable) and validation refuses them.
Is there anyway around this other than to refactor the Views to use ViewModels (and set different validation rules so submit works)?
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