.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

Viewmodel property not set to [Required] yet getting error message saying it is?

Posted By:      Posted Date: August 25, 2010    Points: 0   Category :ASP.Net

I have a viewmodel that i use for my view

public int SelectionId{ get; set; }        
public IEnumerable<Selections> Selections { get; set; }

Notice that SelectionId is not decorated with [Required]. In my view, i use DropDownFor like this:

<%= Html.DropDownListFor(m => m.SelectionId, new SelectList(Model.Selections, "Id", "Name"), "--- Select ---")%>

It should be possible to not select anything from the dropdown, resulting in model.SelectionId = 0, which is fine. Why do i get a "SelectionId field is required" error when i Post?  If i do this:

<%= Html.DropDownList(mySelectionId, new SelectList(Model.Selections, "Id", "Name"), "--- Select ---")%>

I no longer get the error if i dont select anything, which is what i want - but no way to bind it to the id if the user does select something

thanks for any help!

View Complete Post

More Related Resource Links

error in MVC2 on empty string form fields which are required: "This property cannot be set to a null

In model I have:[DisplayName("ISBN")] [Required(ErrorMessage = "ISBN is required.")] [StringLength(50, ErrorMessage = "ISBN book must have max {1} chars.")] [DisplayFormat(ConvertEmptyStringToNull = false)] public string isbn { get; set; }But when I submit form with empty field ISBN I have an error - ConstraintException: This property cannot be set to a null value.I have find that other people have the same problem and they say that debbugger in VS2010 works wrong - yes ?http://p2p.wrox.com/book-professional-asp-net-mvc-2/79788-constraintexception-unhandled-user-code.html#post259245http://efreedom.com/Question/1-3129080/Server-Side-Validation-REQUIRED-String-Property-MVC2-Entity-Framework-Workhttp://mvcmusicstore.codeplex.com/workitem/6604

How to localize "field is required" validation error message in mvc musicstore sample

I tried to localize codeplex mvc musicstore sample in .NET 3.5
I replaced "field is required"  message in all files with localized text.

In login of register screen, if some fields are empty, pressing enter still shows english language text like

The UserName field is required.

How to localize this validation message ?


Inserting personal error message in ValidationSummary



I am creating a web form that requires a lot of validation. I use many of the validation control in asp.net already like RequiredFieldValidator and CompareValidator. 

My Problem: after my custom validation for the value entered return an error message, and I pressed enter key when the field is empty, my custom error message is overlapped by my ValidationSummary. 

Setting my custom error to visible = false on button click also does not seem to work as it requires for me to enter the value first.

This made me think, is there a way to insert my custom validation inside the ValidationSummary as an error message like for other validation control?

Thanks in advance

Jscript error: Object does not support property or method


 Hi, i have little knowledge on javascript but i need to use this code get from somewhere for a jquery to work.

I face this "Jscript runtime error: Object does not support property or method" whenever im trying to run this page.

In my experience, im get this error msg 9 out of 10 times i use javascript in my system.

Im using Microsoft Visual web developer 2008, i wonder if this is related to my problem, i not sure there is anything i need to add as reference or update anything.

But anyway, in short, i just couldn't use javascript code when using this development tool because of this sort of error.

Anyway, it happen that last time i tried use the same type of jquery code in another project and it seems to work well without an error.

But now when im try to use it again in this recent project i created, it come out with this error and i have no idea how to solve it even look through google and this forum.

It doesn't really seems like its the code problem itself although im not sure, because any javascript code just couldn't work.

So below is my code that i need to use.

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" ></script>
<script type="text/javascript" src=&quo

create user wizard login error message dont show in a message box?




i am using create user wizard and capturing other information within content template when a new user

registers. Some of the textboxes are binded to required field validators.


there is a validation control on the page and ShowMessage box is True.

If they dont complete some of the text boxes then the message box pops Up with the error message.

It does not however include information errors like "User already exists" or Email address already exists

from the create user wizard membership  UserName and Password Textboxes


is it possilbe to hook all of these up so I get one message box with all errors including membership ones?




Very Basic Question - Error message running first page


Hi Everyone,

I am running Windows 7 and I have gone into Control Panel and activated all of the IIS Functions.

The web application I am running was downloaded from the net (and has worked on other machines previously).  Once I downloaded it, I moved it into C:/inetpub/wwwroot/code/main.asp

I am a bit of a novice at this!  But I am hoping someone can point me in the right direction!


I get the following error when I try and run the web application through IE:

"An error occurred on the server when processing the URL. Please contact the system administrator. If you are the system administrator please click here to find out more about this error."

(When i click the "click here" button it just goes to the IIS site).


Appreciate any help I can get!




Localize framework message from xml validation error


I need to validate an XML through XSD. I am using XMLReader (with XmlReaderSettings and 

Validation_EventHandler to do it). Depend on users preference, I would like to change the output message generated by  Validation_EventHandler in french or english.

Any idea on how to perform this?





Compiler Error Message : CS0006: Metadata file 'System.EnterpriseServices.dll' could not be found


I get this error when i Debug my web application....


I followed these steps.,

  • Ended the aspnet_wp.exe process in the Windows Task Manager
  • Then deleted the application`s folder in C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\
  • Then started Visual Studio 2008 again

I also rebooted my system but no use....

Plz help !

Error Message when trying to open crystal report


Logon failed. Details: 42000:[Microsoft][ODBC SQL Server Driver][SQL Server]Cannot open database "DATA" requested by the login. The login failed. Error in File C:\Windows\TEMP\NewQuote {573CE511-64B7-4161-B9DF-0E58EB1EDA19}.rpt: Unable to connect: incorrect log on parameters.

I get the above message when loading the crystal report from the Intranet via IIS but it works fine from the localhost the report loads ok and picks up my parameters.  This is my Code behind Page.

Protected Sub form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles CrystalReportViewer1.Load

        Dim Count As Int32
        Count = Int32.Parse(Label1.Text)

        Dim ConnInfo As New ConnectionInfo
        With ConnInfo
            .ServerName = "\\Server1\Sqlexpress"
            .DatabaseName = "DATA"
            .UserID = "sa"
            .Password = "1181

Weird security configuration error message


Recently something has gone wrong with our website so that whenever you try to access an aspx file, it shows the following error:


Server Error in '/RALSWeb' Application.

Configuration Error

Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Access is denied: 'RalsWeb'.

Source Error:

Line 256:                <add assembly="System.EnterpriseServices, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
Line 257:                <add assembly="System.Web.Mobile, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
Line 258:                <add assembly="*"/>
Line 259:            </assemblies>

Using Dynamic Property inside Html Helper with Razor fires an error



I have the following with Razor:

@Html.GoogleAjax(View.GoogleAjaxKey, new String[,] { { "jquery", "1.4.2" } })

And the I get a strange error:

  'System.Web.Mvc.HtmlHelper<object>' has no applicable method named 'GoogleAjax' but appears to have an extension method by that name. Extension methods cannot be dynamically dispatched. Consider casting the dynamic arguments or calling the extension method without the extension method syntax.

What is strange is that it works fine using:

@Html.GoogleAjax("123", new String[,] { { "jquery", "1.4.2" } })

I tried the following code line:


And the key is displayed just fine so the problem is how I use the value of @View.GoogleAjaxKey into Html.GoogleAjax.

Do I need to change something on my Html Helper? Here it is:

    public static MvcHtmlString GoogleAjax(this HtmlHelper helper, String key, String[,] libraries) {


MVC3: Define Dynamic ViewModel property inside Action Filter



How can I define a Dynamic ViewModel property in MVC 3 inside an action filter?

I am looking to have something like but inside the ActionFilter and not in the controller:

ViewModel.Title = "Home";

Thank You,


Parser Error Message: Could not load type MasterPage File



Server Error in '/' Application.

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Could not load type 'wamsilverlight.Web.Wam'.

Source Error:

Line 1:  <%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Wam.master.cs" Inherits="wamsilverlight.Web.Wam" %>
Line 2:  
Line 3:  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Source File: /Wam.Master    Line: 1

Version Information: Microsoft .NET Framework Version:2.0.50727.4952; ASP.NET Version:2.0.50727.4927


All of the following have been tried over and over again:

1.) Delete all existing .dlls

2.) Delete MasterPage File and recreate it.

3.) Delete MasterPage perform a c

Error message when selecting a row in webdatagrid



I have a webdatagrid control that is loaded by using an sqldatasource.  I have add and edit methods that behave correctly, however, I have a problem when I delete a row.   I can delete the row correctly from the datagrid and the database, but as soon as I select another row in the grid straight after, I get an error:

Microsoft JScript runtime error: 'undefined' is null or not an object


There are no events wired up to the row select, so it doesn't appear to be that.


Can anyone help?


override error message (The value 'test' is not valid for Age) when input incorrect data type for in


Hello everyone,

I've tried to override error message when input incorrect data type in input field on HTML form. For example I have the model like this.

public class Person
public string FirstName {get;set;}
public int Age {get;set;}


For view, I put text input for Age to get it value.

When type some string in Age text box like 'test' and press submit button. I got this error message

The value 'xxx' is not valid for Age

However, I want to change this message and try many way. There 's nothing effect this message value.

Please could you help me to solve this problem.

error in MicrosoftAjax.js: Cannot read property '_notified' of null


I am cross testing my project with multiple browsers: IE7, Firefox and Chrome.

One one page I have a dynamically built table with two DropDownLists and CascadingDropDown extenders. Maybe the only thing special about the drop down lists is, that I add a "onChange" for the second drop down list in each row which shows or hides the list depending on the value populated from the web services.

All of this works perfectly in IE7 and Firefox, but Chrome does not execute the JavaScript in the onChange attribute and the error console says:

Uncaught TypeError: Cannot read property '_notified' of null

Object or Property is not supported in IE8 - javascript error



I am using following code line in my web app through external javascript file.






both these methods are working fine in IE6 but failing in IE8 with a error: "Object or Property is not supported".


any solution would be appreciated!



ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend