Error Message

Microsoft.FxCop.Sdk.FxCopException: The indirectly-referenced Silverlight assembly ‘System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e, Retargetable=Yes’ could not be found. This assembly is not required for analysis, however, analysis results could be incomplete. Silverlight reference assemblies should be specified with the ‘/reference’ switch. This assembly was referenced by: {0}\bin\Autofac.dll.

I am still not able to find the solution yet but what I found is that a lot of people are having the same problem and asking for new version of FxCop for .NET 4.5.

Please vote this “Update standalone FxCop to support .NET 4.5 and Portable Libraries” if you are also looking for Fxcop for .NET 4.5.

Or, If you know the solution or workaround, please share with us. Thanks!

Prize

• 17 first prize winners will each receive a Windows Phone 8.
• 3 grand prize winners will each receive a Surface Pro and Windows Phone 8.
• 20 winners will be announced Friday, July 19th at the PhoneGap Day event in Portland, Oregon.

How to participate?

• Register with your Microsoft account and tell us about your app.
• Port your app and test it in the Windows Phone Emulator.
• Publish to the Windows Phone Store by June, 30th 2013.

You can read more about this contest @ http://www.phonegapwpchallenge.com

The error message that we got is as below.

Error Message: The ‘VirtualItemCount’ property cannot be set declaratively.

There is a custom control that we are using in our exisitng ASP.NET 4.0 project. There is the code that set VirtualItemCount in aspx but it stopped working after installing .NET 4.5 on the server.

Unfortunately, it turns out that it’s a known issue that has been reported in MS Connect. You can read about this bug report here. Microsoft didn’t mention about fixing this bug so far but there is a workaround that you can use before Microsoft release the fixes.

Workaround

In the meantime, you can apply an easy workaround which is to set the custom control’s property value in code behind and remove the affected property from the mark up.

CA0058 Error Running Code Analysis CA0058 : The referenced assembly ‘System.Net.Http, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ could not be found. This assembly is required for analysis and was referenced by: {Your-Project-Path}\packages\Microsoft.AspNet.WebApi.Core.4.0.20710.0\lib\net40\System.Web.Http.dll. [Errors and Warnings] – (Global)

Solution

1. Go to “%ProgramFiles(x86)%\Microsoft Visual Studio 10.0\Team Tools\Static Analysis Tools\FxCop” or “%ProgramFiles(x86)%\Microsoft Visual Studio 11.0\Team Tools\Static Analysis Tools\FxCop” if you have VS 2012.
2. Open FxCopCmd.exe.config and change AssemblyReferenceResolveMode from StrongName to StrongNameIgnoringVersion
3. Save the change and rebuild your project

Credit: 

Thanks to this post. http://goo.gl/bnFMg

Error Message

The term ‘update-database’ is not recognized as the name of a cmdlet, function, script file, or operable program. Che
ck the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:16
+ update-database <<<< -script
+ CategoryInfo : ObjectNotFound: (update-database:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

Solution

You can use the following command to import the EF module.

Import-Module C:\Work\branches\v1\src\packages\EntityFramework.5.0.0\tools\EntityFramework.psd1

Error Message

The operation failed: The relationship could not be changed because one or more of the foreign-key properties is non-nullable. When a change is made to a relationship, the related foreign-key property is set to a null value. If the foreign-key does not support null values, a new relationship must be defined, the foreign-key property must be assigned another non-null value, or the unrelated object must be deleted.

Solution

Have you ever encountered problems in deleting the child records? One team member from my team got that problem a couple of months back.. The only solution that I found is that you need to change the state of child object to “Deleted” instead of using “Remove()” function. The code below is to show you how to delete the child records. Please focus on “DeleteAllChildren()”. Please let me know if you have a better solution for this issue. Thanks!

public class TestDbContext : DbContext
{
public DbSet Parent { get; set; }
}

public class Parent
{
public int Id { get; set; }
public string Name { get; set; }
public virtual ICollection Children { get; set; }
}

public class Child
{
public int Id { get; set; }
public int ParentId { get; set; }
public string Name { get; set; }
}

private static void DeleteAllChildren()
{
var context = new TestDbContext();

var existingRecord = context.Parent.Include(c => c.Children).First();

for (var i = existingRecord.Children.Count - 1; i >= 0;i-- )
{
var child = existingRecord.Children.ElementAt(i);
var dbEntity = context.Entry(child);
dbEntity.State = System.Data.EntityState.Deleted;
}

context.SaveChanges();

Console.WriteLine("Done");
Console.ReadLine();
}

private static void Create()
{
var parent = new Parent()
{
Name = "M",
Children = new Collection{
new Child (){ Name ="A"},
new Child (){ Name ="B"}
}
};

var context = new TestDbContext();
context.Parent.Add(parent);

context.SaveChanges();
}
var context = new TestDbContext();
var first = context.Parent.First();
context.Parent.Remove(first);
context.SaveChanges();

A lot of people recommended that MvcMailer is a great package for those who want to send email from ASP.NET MVC app but seems like the author of that package really didn’t get time to update the dependencies of his package.

Here is what you will see when you try installing MvcMailer in VS 2010.

PM> Install-Package mvcmailer
Attempting to resolve dependency ‘T4Scaffolding (≥ 0.9.7)’.
Attempting to resolve dependency ‘EntityFramework (≥ 4.1.10311.0)’.
You are downloading EntityFramework from Microsoft, the license agreement to which is available at http://go.microsoft.com/fwlink/?LinkId=224682. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device.
Successfully installed ‘EntityFramework 4.1.10715.0′.
Successfully installed ‘T4Scaffolding 0.9.9′.
Successfully installed ‘MvcMailer 1.1′.
Successfully removed ‘EntityFramework 4.1.10331.0′ from MvcApplication3.
Successfully added ‘EntityFramework 4.1.10715.0′ to MvcApplication3.
Successfully added ‘T4Scaffolding 0.9.9′ to MvcApplication3.
Set-DefaultScaffolder : Unable to cast object of type ‘NuGet.SemanticVersion’ to type ‘System.Version’.
At C:\users\michael.sync\documents\visual studio 2010\Projects\MvcApplication3\packages\T4Scaffolding.0.9.9\tools\install.ps1:22 char:22
+ Set-DefaultScaffolder <<<< -Name DbContext -Scaffolder T4Scaffolding.EFDbContext -SolutionWide -DoNotOverwriteExistingSetting
+ CategoryInfo : NotSpecified: (:) [Set-DefaultScaffolder], InvalidCastException
+ FullyQualifiedErrorId : T4Scaffolding.Cmdlets.SetDefaultScaffolderCmdlet

Set-DefaultScaffolder : Unable to cast object of type ‘NuGet.SemanticVersion’ to type ‘System.Version’.
At C:\users\michael.sync\documents\visual studio 2010\Projects\MvcApplication3\packages\T4Scaffolding.0.9.9\tools\install.ps1:23 char:22
+ Set-DefaultScaffolder <<<< -Name Repository -Scaffolder T4Scaffolding.EFRepository -SolutionWide -DoNotOverwriteExistingSetting
+ CategoryInfo : NotSpecified: (:) [Set-DefaultScaffolder], InvalidCastException
+ FullyQualifiedErrorId : T4Scaffolding.Cmdlets.SetDefaultScaffolderCmdlet

Set-DefaultScaffolder : Unable to cast object of type ‘NuGet.SemanticVersion’ to type ‘System.Version’.
At C:\users\michael.sync\documents\visual studio 2010\Projects\MvcApplication3\packages\T4Scaffolding.0.9.9\tools\install.ps1:24 char:22
+ Set-DefaultScaffolder <<<< -Name CustomTemplate -Scaffolder T4Scaffolding.CustomTemplate -SolutionWide -DoNotOverwriteExistingSetting
+ CategoryInfo : NotSpecified: (:) [Set-DefaultScaffolder], InvalidCastException
+ FullyQualifiedErrorId : T4Scaffolding.Cmdlets.SetDefaultScaffolderCmdlet

Set-DefaultScaffolder : Unable to cast object of type ‘NuGet.SemanticVersion’ to type ‘System.Version’.
At C:\users\michael.sync\documents\visual studio 2010\Projects\MvcApplication3\packages\T4Scaffolding.0.9.9\tools\install.ps1:25 char:22
+ Set-DefaultScaffolder <<<< -Name CustomScaffolder -Scaffolder T4Scaffolding.CustomScaffolder -SolutionWide -DoNotOverwriteExistingSett
ing
+ CategoryInfo : NotSpecified: (:) [Set-DefaultScaffolder], InvalidCastException
+ FullyQualifiedErrorId : T4Scaffolding.Cmdlets.SetDefaultScaffolderCmdlet

Successfully added ‘MvcMailer 1.1′ to MvcApplication3.
Set-DefaultScaffolder : Unable to cast object of type ‘NuGet.SemanticVersion’ to type ‘System.Version’.
At C:\users\michael.sync\documents\visual studio 2010\Projects\MvcApplication3\packages\MvcMailer.1.1\tools\Install.ps1:23 char:22
+ Set-DefaultScaffolder <<<< -Name Mailer -Scaffolder $mailerScaffolder -SolutionWide -DoNotOverwriteExistingSetting
+ CategoryInfo : NotSpecified: (:) [Set-DefaultScaffolder], InvalidCastException
+ FullyQualifiedErrorId : T4Scaffolding.Cmdlets.SetDefaultScaffolderCmdlet
—————————READ ME—————————————————

Your default Mailer Scaffolder is set to Mailer.Razor

You can generate your Mailers and Views using the following Scaffolder Command

PM> Scaffold Mailer UserMailer Welcome,GoodBye

Edit the smtp configuration at web.config file before you send an email

You can find more at: https://github.com/smsohan/MvcMailer/wiki/MvcMailer-Step-by-Step-Guide

————————————————————————————-
Successfully uninstalled ‘EntityFramework 4.1.10331.0′.

PM>

Solution

As you can see, MvcMailer has the dependency on “T4Scaffolding (v0.9.9)” package which has dependency on “EFCodeFirst” package which is the outdated version of EF. All you have to do to make MvcMailer works is very simple. Just update “T4Scaffolding” package by using “Update-Package” command from Nuget Console.

PM> Update-Package T4Scaffolding
Updating ‘T4Scaffolding’ from version ’0.9.9′ to ’1.0.6′ in project ‘MvcApplication3′.
Successfully removed ‘T4Scaffolding 0.9.9′ from MvcApplication3.
Successfully installed ‘T4Scaffolding 1.0.6′.
—
A different version of T4Scaffolding is already running in this instance of Visual Studio
Please restart Visual Studio to avoid unexpected behavior.
You won’t be able to use scaffolding until you restart Visual Studio.
—
Successfully added ‘T4Scaffolding 1.0.6′ to MvcApplication3.
Successfully uninstalled ‘T4Scaffolding 0.9.9′.

After updating the package, you need to restart the Visual Studio.

Testing

Now, you can test MvcMailer’s Scaffold by using the command below. If you want to know more details, you can read “MvcMaler: Step by Stp Guide“.

PM> Scaffold Mailer.Razor UserMailer Welcome,PasswordReset
Added MvcMailer output ‘Mailers\IUserMailer.cs’
Added MvcMailer output ‘Mailers\UserMailer.cs’
Added MyScaffolder output ‘Views\UserMailer\_Layout.cshtml’
Added MyScaffolder output ‘Views\UserMailer\Welcome.cshtml’
Added MyScaffolder output ‘Views\UserMailer\PasswordReset.cshtml’
PM>

Problem

Anthem.NET Ajax library written by Jason Diamonds supports only ASP.NET 1.1 and ASP.NET 2.0. This library is totally depending on the classic client id generation. When we upgraded our project to .NET 4.0, we found that the pages that use Anthem.NET doesn’t work anymore.

Please refer to the following links below to see ASP.NET 4.0 breaking changes.

ASP.NET 4.0 breaking changes

ClientIDMode.

Solution

The solution for this issue is very simple. You can set the compatibility mode to 3.5 in web.config and then Anthem.NET will work without changing anything.

Here is the code that you copy.

<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID">

<controls>

<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>

<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>

</controls>

</pages>

Download

I converted the existing project to .NET 4.0 as well. You can download it from the link below.

• git@github.com:michaelsync/Michael-Sync-s-blog-sample.git
• https://github.com/michaelsync/Michael-Sync-s-blog-sample/tree/master/anthem-1.5.3

Thanks to Darin Dimitrov (MVP)  for answering questions in very details!

Test Project Download ~

• git clone: git@github.com:michaelsync/Michael-Sync-s-blog-sample.git
• AjaxJsonTest

Scenario

I have the following model, view and controller.

Model

public class Person {
 public string Name;// { get; set; }
 public string Occupation { get; set; }
 public int Salary { get; set; }
 public int[] NumArr { get; set; }
}

View

<input id="Test" type="button" value="Test" />

@section Javascript{
<script type="text/javascript">// <![CDATA[
 $(function () {
 $("#Test").click(function () {
 var data = { Name: "Michael Tom", Occupation: "Programmer", Salary: 8500, NumArr: [2,6,4,9] };
 var url = "Home/GetJson";
 $.ajax({
 url: url,
 dataType: "json",
 type: "POST",
 data: data,
 traditional: true,
 success: function (result) {

}
 });

});
 });
// ]]></script>
}

Controller

public class HomeController : Controller
 {
 public ActionResult Index()
 {
 return View();
 }

public JsonResult GetJson(Person person) {

return Json(......);
 }
 }

Questions

1) Why can’t we use the public field instead of properties in Model? 

Because the model binder works only with properties. It is by design. Normally fields should be private in your classes. They are implementation detail. Use properties to expose some behavior to the outer world.

2) If I changed the type of NumArr property to List<int> then it doesn’t work. How can we use List instead of the int[]? I know I’m passing the array from JS. Can we pass List<T> from JS as well?

It should work. No matter whether you use List<int>, IEnumerable<int> or int[], it’s the same and it works. What wouldn’t work is if you wanted to use a collection of some complex object like for example List<SomeComplexType> (see my answer below for a solution to this).

3) I’m using “traditional: true” in Javascript code block of View because serialization doesn’t work with “traditional: false”. Does ASP.NET MVC’s serializer support only old version?

Yes, the traditional parameter was introduced in jQuery 1.4 when they changed the way jQuery serializes parameters. The change happened to be non-compatible with the standard convention that the model binder uses in MVC when binding to lists.

So download a javascript debugging tool such as FireBug and start playing. You will see the differences in the way jQuery sends the request when you set this parameter.

All this being said I would recommend you to send JSON encoded requests to your controller actions. This will work with any complex objects and you don’t have to ask yourself which version of jQuery you are using or whatever because JSON is a standard interoperable format. The advantage of a standard interoperable format is that no matter which system you use, you should be able to make them talk the same language (unless of course there are bugs in those systems and they do not respect the defined standard).

But now you could tell me that application/x-www-form-urlencoded is also a standard and inetroperable format. And that’s true. The problem is that the model binder uses a convention when binding the name of the input fields into properties of your models. And this convention is far from something being interoperable or industry standard.

So for example you could have an hierarchy of models:

public class Person
{
 public string Name { get; set; }
 public string Occupation { get; set; }
 public int Salary { get; set; }
 public List SubObjects { get; set; }
}

public class SubObject
{
 public int Id { get; set; }
 public string Name { get; set; }
}

You could imagine any complex hierarchy you like (at the exception of circular references which are not supported by the JSON format). and then:

var data = {
 name: "Michael Tom",
 occupation: "Programmer",
 salary: 8500,
 subObjects: [
 { id: 1, name: 'sub 1' },
 { id: 2, name: 'sub 2' },
 { id: 3, name: 'sub 3' }
 ]
};

$.ajax({
 url: "Home/GetJson",
 type: "POST",
 data: JSON.stringify({ person: data }),
 contentType: 'application/json',
 success: function (result) {

}
});

We set the Content-Type request HTTP header to application/json to indicate the built-in JSON value provider factory that the request is JSON encoded (using the JSON.stringify method) and it will parse it back to your strongly typed model. The JSON.stringify method is natively built into modern browsers but if you wanted to support legacy browsers you could include the json2.js script to your page.

Reference:

• MVC 3 – JSON serializer

Paul Betts has diagnosed this as having some auto-generated files which are currently UTF16, which Git does not support. I’m working to figure out exactly how widespread the problem is.

Seems like codeplex is having the encoding problem with UTF16 file on git repository.

Update #2: Brad Wilson said that he has fixed that file. I re-pulled the repo again and tested it.. It works!

Introduction

Scott Guthrie announced that Microsoft is releasing the source code of ASP.NET Web API and ASP.NET Web Pages (aka Razor) under an open source license (Apache 2.0). They will be accepting the contributions from community as well. What a great news for us! I’m really happy to see more open source projects coming out from Microsoft.

Even though I’m currently occupied with my school, work and etc, I tried downloading the source code from codeplex and building it with a lot and lot of love. (If you don’t know how to install git on your machine, please follow this post “Set Up Git” from github. )

• Git: git clone https://git01.codeplex.com/aspnetwebstack.git

I got the following folders once I cloned the git repository.

The first thing that I need to do is to restore the nuget packages. Microsoft put the nuget configuration file only instead of  all those third-party assemblies that are required to build the source code. This can be achieved by running “build RestorePackages” from the root of the repository that I just cloned.

You can enable the nuget restore permanently by adding this system variable in your environment.

Otherwise, you will get this error.

Error 1 NuGet package restore is not currently enabled. For more information, please see: http://aspnetwebstack.codeplex.com/wikipage?title=NuGet+Packages System.Web.Razor

According to the official document, we need to download “SkipStorngNames” and run “skipstrongnames -e” with admin right in command prompt but I didn’t do it on one of my machines and I can still build the whole code (including test) from VS10. I’m still pretty new to the code base so I will download and run it when I need.

Errors and Warning

When I tried building the solution, I got this error below.

WebGrid\_WebGridRenderer.generated.cs(1,1): error CS0116: A namespace cannot directly contain members such as fields or methods [C:\aspnetwebstack\src\System.Web.Helpers\System.Web.Helpers.csproj]

I thought that the auto-generated code got screwed up so I deleted everything from that file and tried saving the _WebGridRenderer.cshtml again. Nothing was generated and found two warnings below.

Warning 8 C:\Michael Sync\++ Project\aspnetwebstack\aspnetwebstack\src\System.Web.Helpers\WebGrid\_WebGridRenderer.cshtml: ASP.NET runtime error: There is no build provider registered for the extension ‘.cshtml’. You can register one in the <compilation><buildProviders> section in machine.config or web.config. Make sure is has a BuildProviderAppliesToAttribute attribute which includes the value ‘Web’ or ‘All’. C:\Michael Sync\++ Project\aspnetwebstack\aspnetwebstack\src\System.Web.Helpers\WebGrid\_WebGridRenderer.cshtml 1 1 System.Web.Helpers

Warning 1 Cannot find custom tool ‘RazorHelperGenerator’ on this system. C:\Michael Sync\++ Project\aspnetwebstack\aspnetwebstack\src\System.Web.Helpers\WebGrid\_WebGridRenderer.cshtml System.Web.Helpers

(Temp?) Solution

Ok! There are a lot of doubts and questions but I will share the way that I fixed in order to build the solution without any error.

The main problem that we can’t build is that _WebGridRenderer.generated.cs file has weird non-English characters but when you look at that file in browser, you can see the English version.

The picture below shows the differences between the file that I have and the file on server.

So, I manually copied it from browser (downloading the code as zip file doesn’t work either) and override everything in _WebGridRenderer.generated.cs. After that, it works.

If you are desperately willing to build the code right now, you can follow what I did. I will keep you updated once I found something useful.

Conclusion

You are no longer need to use the temp solution that I mentioned above.. The coordinator from project has fixed the issue and you should be able to re-pull the repository and can build the project already.

Thanks!