Had the same message when trying to use Mock.setup to mock a method with multiple default parameters. I just had to add the additional parameters in the lambda.

    void someMethod(string arg1 = &quot;&quot;, string arg2 = &quot;&quot;)

    mockedObject.Setup(x =&gt; x.someMethod(It.IsAny&lt;string&gt;(), It.IsAny&lt;string&gt;()))

The [underlying expression tree API][1] does not support optional arguments.

For IL-compiled code the C# compiler inserts the default values at compile time (hard-coded), because the CLR does not support calling methods with optional arguments either when the arguments are not provided explicitly.


  [1]: http://msdn.microsoft.com/en-us/library/system.linq.expressions.expression.call.aspx

Error: &#39;an exception tree may not contain a call or invocation that uses option arguments&#39;

Why: Because you are not providing the optional parameters when calling the method. Mainly you get this with .net core when using IAsyncProxy service object.

Fix: Pass all the optional parameters value, you may use default value if you.

I&#39;m using the DataType.Date attribute on my model and an EditorFor in my view. This is working fine in [Internet&amp;nbsp;Explorer&amp;nbsp;8][1] and [Internet&amp;nbsp;Explorer&amp;nbsp;9][2], but in [Google Chrome][3] it is showing a date picker and instead of displaying the value it just displays &quot;Month/Day/Year&quot; in faded gray text.

Why won&#39;t Google Chrome display the value?

Model:

    [DataType(DataType.Date)]
    public Nullable&lt;System.DateTime&gt; EstPurchaseDate { get; set; }

View:

    &lt;td class=&quot;fieldLabel&quot;&gt;Est. Pur. Date&lt;/td&gt;
    &lt;td class=&quot;field&quot;&gt;@Html.EditorFor(m=&gt;m.EstPurchaseDate)&lt;/td&gt;

![Chrome][4]

![Internet Explorer][5]

  [1]: http://en.wikipedia.org/wiki/Internet_Explorer_8
  [2]: http://en.wikipedia.org/wiki/Internet_Explorer_9
  [3]: http://en.wikipedia.org/wiki/Google_Chrome
  [4]: http://i.stack.imgur.com/f0c0A.png
  [5]: http://i.stack.imgur.com/ro17M.png


MVC4 DataType.Date EditorFor won&#39;t display date value in Chrome, fine in Internet Explorer

I wrote myself a utility to break a list into batches of given size. I just wanted to know if there is already any apache commons util for this.

    public static &lt;T&gt; List&lt;List&lt;T&gt;&gt; getBatches(List&lt;T&gt; collection,int batchSize){
		int i = 0;
		List&lt;List&lt;T&gt;&gt; batches = new ArrayList&lt;List&lt;T&gt;&gt;();
		while(i&lt;collection.size()){
			int nextInc = Math.min(collection.size()-i,batchSize);
			List&lt;T&gt; batch = collection.subList(i,i+nextInc);
			batches.add(batch);
			i = i + nextInc;
		}
		
		return batches;
	}


Please let me know if there any existing utility already for the same.

Is there a common Java utility to break a list into batches?

&gt; An expression tree may not contain a call or invocation that uses
&gt; optional arguments

    return this.RedirectToAction&lt;MerchantController&gt;(x =&gt; x.Edit(merchantId));

Where edit had a second, nullable argument.

Why is this?



An expression tree may not contain a call or invocation that uses optional arguments

> An expression tree may not contain a call or invocation that uses
> optional arguments
<pre><code class="hljs language-kotlin">return this.RedirectToAction&#x3C;MerchantController>(x => x.Edit(merchantId));
</code></pre>
Where edit had a second, nullable argument.
Why is this?

In the past few days I have tested the new features of .net 4.5 and c# 5.

I like its new async/await features. Earlier I had used [BackgroundWorker][1] to handle longer processes in the background with responsive UI.

My question is: after having these nice new features, when should I use async/await and when a [BackgroundWorker][2]? Which are the common scenarios for both?


  [1]: http://msdn.microsoft.com/en-us/library/vstudio/system.componentmodel.backgroundworker%28v=vs.100%29.aspx
  [2]: http://msdn.microsoft.com/en-us/library/vstudio/system.componentmodel.backgroundworker%28v=vs.100%29.aspx

Async/await vs BackgroundWorker

I try to hash a string using SHA256, I&#39;m using the following code:

    using System;
    using System.Security.Cryptography;
    using System.Text;
     public class Hash
        {
        public static string getHashSha256(string text)
        {
            byte[] bytes = Encoding.Unicode.GetBytes(text);
            SHA256Managed hashstring = new SHA256Managed();
            byte[] hash = hashstring.ComputeHash(bytes);
            string hashString = string.Empty;
            foreach (byte x in hash)
            {
                hashString += String.Format(&quot;{0:x2}&quot;, x);
            }
            return hashString;
        }
    }

However, this code gives significantly different results compared to my friends php, as well as online generators (such as [This generator][1])

Does anyone know what the error is? Different bases?


  [1]: http://hash.online-convert.com/sha256-generator

Hashing a string with Sha256

I have a view `AttributeView` that contains all sorts of attributes. There&#39;s also a button that when pressed, it should set the default values to the attributes. I also have a `ViewModelBase` class that is a base class for all ViewModels I have.
The problem is I can&#39;t seem to get the button bound to the command with WPF.

I&#39;ve tried this, but it just doesn&#39;t do anything:

    &lt;Button Command=&quot;{Binding DataInitialization}&quot; Content=&quot;{x:Static localProperties:Resources.BtnReinitializeData}&quot;&gt;&lt;/Button&gt;

The command is defined (in the `ViewModelBase`) like this:

    public CommandBase DataInitialization { get; protected set; }

and on application startup a new instance is created for the command:

    DataInitialization = new DataInitializationCommand()

However, the WPF binding doesn&#39;t seem to &quot;find&quot; the command (pressing the button does nothing). The ViewModel used in the current view is derived from the `ViewModelBase`. What else I can try (I&#39;m quite new to WPF so this might be a very simple question)?

How to bind WPF button to a command in ViewModelBase?

I currently use NLog on a lot of projects. On some, I log to a database. 

Here is what I would like to do:

    CREATE TABLE [dbo].[NLogEntries](
  	  [Id] [bigint] IDENTITY(1,1) NOT NULL,
	  [Origin] [nvarchar](100) NOT NULL,
	  [LogLevel] [nvarchar](20) NOT NULL,
	  [Message] [nvarchar](3600) NOT NULL,
	  [CreatedOn] [datetime] NOT NULL,
	  [OrderId] [int] NULL --Custom field!
    )

And NLog.config with this target:

&lt;!-- language: xml --&gt;

    &lt;target type=&quot;Database&quot; name=&quot;database&quot; connectionstring=&quot;Server=localhost;Database=NLog;Trusted_Connection=True;&quot;&gt;
      &lt;commandText&gt;
        INSERT INTO NLogEntries ([Origin], [Message], [LogLevel],[CreatedOn],[OrderId]) VALUES (@Origin,@Message,@LogLevel,@Date, @OrderId);
      &lt;/commandText&gt;
      &lt;parameter name=&quot;@Date&quot; layout=&quot;${date}&quot;/&gt;
      &lt;parameter name=&quot;@Origin&quot; layout=&quot;${callsite}&quot;/&gt;
      &lt;parameter name=&quot;@LogLevel&quot; layout=&quot;${level}&quot;/&gt;
      &lt;parameter name=&quot;@message&quot; layout=&quot;${message}&quot;/&gt;
      &lt;parameter name=&quot;@OrderId&quot; layout=&quot;${orderId}&quot;/&gt; &lt;!-- custom field! --&gt;
    &lt;/target&gt;

And then log something like this:

    var logger = LogManager.GetCurrentClassLogger();
    var orderId = 123;
    logger.Debug(&quot;What is going on here&quot;, orderId);

Is there a good way to do this and keep using NLog? Or do I have to roll my own logger and skip NLog when these are the requirements?

How do I log a custom field in NLog to database?

I use HTTP `PUT` and `DELETE` in my ASP.NET MVC3 application. When I run it in local, every thing works correctly; But when I publish the application to the server, these methods do not work. 

Are there any special settings for enable a web server to support `PUT` and `DELETE` requests? I&#39;m using shared hosting with IIS 7.5.

**UPDATE:**

I enable `PUT` and `DELETE` requests in `IIS manager`. `PUT` command work fine. But `DELETE` still not works. I create requests by `jQuery`:

I&#39;m in this page:

    http://domain.com/dashboard/edit-site/103323/links/

and my ajax call is:

    $.ajax({
        // url: same as page-url,
        cache: false,
        type: &#39;DELETE&#39;,
        data: { linkid: $(link).data(&quot;linkid&quot;) },
        beforeSend: function () {
            // doing something in UI
        },
        complete: function () {
            // doing something in UI
        },
        success: function (data) {
            // doing something in UI
        },
        error: function () {
            // doing something in UI
        }
    });

This will create a request like this:

    Accept: */*
    Content-Type: application/x-www-form-urlencoded; charset=UTF-8
    Origin: http://domain.com
    Referer: http://domain.com/dashboard/edit-site/103323/links/
    User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1
    X-Requested-With: XMLHttpRequest

With this **`Form Data`**:

    linkid:104044

How do I enable HTTP PUT and DELETE for ASP.NET MVC in IIS?

I am using ASP.NET MVC 3 to build a web application.

What I am trying to do is pass values between two controllers, though there are many ways to do this I am particular interested in using `TempData` for this.

	public ActionResult Action1()
	{
		string someMessage;
		Test obj = SomeOperation();
		if(obj.Valid)
		{
			someMessage = obj.UserName;
		}
		else
		{
			someMessage = obj.ModeratorName;
		}
		
		TempData[&quot;message&quot;] = someMessage;
		
		return RedirectToAction(&quot;Index&quot;);
	}

	public ActionResult Index()
	{
		ViewBag.Message = TempData[&quot;message&quot;]

		return View();
	}

So is the use of `TempData` here correct ? I mean under best programming practices is this correct way of using `TempData` ?

In what real time cases should `TempData` be used ?

**Note :** I have gone through the following links

- https://stackoverflow.com/questions/1500402/when-to-use-tempdata-vs-session-in-asp-net-mvc
- http://www.gregshackles.com/2010/07/asp-net-mvc-do-you-know-where-your-tempdata-is/

Thanks

Using Tempdata in ASP.NET MVC - Best practice

I am attempting to run an application in IIS8 that has the following in the config:

    &lt;modules runAllManagedModulesForAllRequests=&quot;true&quot; /&gt;

IIS8 is giving me an error that says...

&gt; This configuration section cannot be used at this path. This happens
&gt; when the section is locked at a parent level. Locking is either by
&gt; default (overrideModeDefault=&quot;Deny&quot;), or set explicitly by a location
&gt; tag with overrideMode=&quot;Deny&quot; or the legacy allowOverride=&quot;false&quot;.

I&#39;m guessing by the error and a quick SO search that there is some higher level security setting that&#39;s preventing that line from being allowed. Any ideas?

IIS8 Win8 and runAllManagedModulesForAllRequests=&quot;true&quot;

Is there a comprehensive list that explains all of the new features of MVC4 and what all has changed from MVC3? 

(The [release notes][1] are not much helpful)


  [1]: http://www.asp.net/whitepapers/mvc4-release-notes#_Toc303253808

Difference between ASP.NET MVC 3 and 4?

How would I generate a select list, where the text field, is made up of two or more text columns, eg: Where I have a Description and Rate field in my database, I want to combine these to show:

    Large--&#163;200
    Medium--&#163;150
    Small--&#163;100

Controller code is:
     
     var stands = db.Stands.Where(s =&gt; s.ExhibitorID == null).ToList();
     ViewBag.StandID = new SelectList(stands,&quot;StandID&quot;, &quot;Description&quot; + &quot;-- &#163;&quot; + &quot;Rate&quot;);
   
...and my view is (currently):

        &lt;div class=&quot;editor-field&quot;&gt; 
            @Html.DropDownList(&quot;StandID&quot;, &quot;--Select--&quot;) 
        &lt;/div&gt; 

...but the &quot;Description&quot; + &quot;-- &#163;&quot; + &quot;Rate&quot;); won&#39;t run:

&gt; DataBinding:
&gt; &#39;System.Data.Entity.DynamicProxies.Stand_63F8C9F623B3C0E57D3008A57081AFCD9C39E1A6B79B0380B60840F1EFAE9DB4&#39;
&gt; does not contain a property with the name &#39;Description--&#163;Rate&#39;.


Thanks for any help,

Mark

Content Type	Original Author	Original Content on Stackoverflow
Question	bevacqua	View Question on Stackoverflow
Solution 1 - C#	ds4940	View Answer on Stackoverflow
Solution 2 - C#	usr	View Answer on Stackoverflow
Solution 3 - C#	Rakesh	View Answer on Stackoverflow

An expression tree may not contain a call or invocation that uses optional arguments

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Is there a common Java utility to break a list into batches?

MVC4 DataType.Date EditorFor won't display date value in Chrome, fine in Internet Explorer

Attributions