Add this to you **global.asax**:

    
    routes.IgnoreRoute(&quot;favicon.ico&quot;);



You can also specify the ignore route with constraints

    routes.IgnoreRoute(&quot;{*favicon}&quot;, new { favicon = @&quot;(.*/)?favicon.ico(/.*)?&quot; });

The top answers are correct.

    routes.IgnoreRoute(&quot;{*favicon}&quot;, new { favicon = @&quot;(.*/)?favicon.ico(/.*)?&quot; });

But for newer versions of MVC you must add this at the top of the **RegisterRoutes** method in **RouteConfig.cs** (so somewhere before routes.MapRoute(..) is called).




You are probably getting this with the VS web server. Right?

You wouldn&#39;t get this with IIS since IIS (by default) handles requests for images (.ico, .jpg, .gif, et cetera) and therefore they don&#39;t make it to your app. 



Interesting as it sounds I got this error only if I had checked the &quot;Enable Just My Code&quot; option under `tools-&gt;options-&gt;debugging`, and as soon as I unchecked it I am no longer getting this error.

Note however that it appears that the error is still being thrown behind the scenes but being caught immediately internally, so the best solution is to code in the global.asax to ignore it as the other answers suggest.

I have a python list with strings in this format:

    A1 = [&#39; &quot;29.0&quot; &#39;,&#39; &quot;65.2&quot; &#39;,&#39; &quot;75.2&quot; &#39;]

How do I convert those strings into decimal numbers to perform arithmetic operations on the list elements?

Python: Converting string into decimal number

How do I know when I&#39;ve stopped scrolling using Javascript?





How do I know when I&#39;ve stopped scrolling?

I get an error:

&gt;&quot;The controller for path &#39;/favicon.ico&#39; was not found or does not implement IController&quot;

Then I thought: how does the framework know for which files it has to instantiate a controller, because the same thing is true for script, css and other files?

(never thought of that, but now the favicon is complaining, I was wondering....)

But back to the error, why does that occur?

mvc: does the favicon.ico also look for a controller?

I get an error:
>"The controller for path '/favicon.ico' was not found or does not implement IController"
Then I thought: how does the framework know for which files it has to instantiate a controller, because the same thing is true for script, css and other files?
(never thought of that, but now the favicon is complaining, I was wondering....)
But back to the error, why does that occur?

I have a URL like this:

`http://www.example.com/mypage.aspx?myvalue1=hello&amp;myvalue2=goodbye`

I want to get `http://www.example.com/mypage.aspx` from it. 

Can you tell me how can I get it?


Get url without querystring

I am running Visual Studio 2010 (as Admin), IIS 7 on Windows 7 x64.
I am able to run the ASP.NET web site in IIS 7 without debugging just fine, but when I press F5 to debug it, I get:

&gt; Unable to start debugging on the web server. Could not start ASP.NET debugging. More information may be available by starting the project without debugging.

Unfortunately the help link is not helping me much and leads down a heck of a large tree of things.

I checked the following:

* Security requirements — I don&#39;t recall having to do anything special before. The worker process in IIS7 is w3wp.exe. It says that if it&#39;s running as ASPNET or NETWORK SERVICE I must have Administrator privileges to debug it. How do I find out if I need to change something here?

* Web site Property Pages &gt; Start Options &gt; Debuggers &gt; ASP.NET is checked.
  Use custom server is set to the URL of the site (which works fine without debugging).

* Debugging is enabled in `web.config`.

* Application is using ASP.NET 3.5 (I want to move to 4.0 eventually but I have some migration to deal with).

* Application pool: Classing .NET AppPool (also tried DefaultAppPool).

Any ideas where I can check next?

Surely it shouldn&#39;t be that hard to install IIS, VS, create a web site, and start testing it?

Thanks in advance.

Unable to start debugging on the web server. Could not start ASP.NET debugging VS 2010, II7, Win 7 x64

I&#39;m using System.IO.File.Create to create a file. I&#39;m not writing to it with a stream writer, just creating it.

I get a server error in the front end when the application tries to open the newly created file - that the file is in use. Garbage collection then seems to come along and a few minutes later all is OK.

Now I know if I was using Streamwriter I would have to close it. Does the same apply to creating?

I&#39;ve read that opening a stream writer to the file then immediately closing it will fix this, but it seems messy. Is there a simpler way?


System.IO.File.Create locking a file

I need to look for specific types in all assemblies in a web site or windows app, is there an easy way to do this?  Like how the controller factory for ASP.NET MVC looks across all assemblies for controllers.

Thanks.

Find Types in All Assemblies

I have an issue with some content that we are downloading from the web for a screen scraping tool that I am building.

in the code below, the string returned from the web client download string method returns some odd characters for the source download for a few (not all) web sites.

I have recently added http headers as below. Previously the same code was called without the headers to the same effect. I have not tried variations on the &#39;Accept-Charset&#39; header, I don&#39;t know much about text encoding other than the basics.

The characters, or character sequences that I refer to are:

&quot;**&#239;&#187;&#191;**&quot; 

and

 &quot;**&#194;**&quot;

These characters are not seen when you use &quot;view source&quot; in a web browser. What could be causing this and how can I rectify the problem?

    string urlData = String.Empty;
    WebClient wc = new WebClient();
    
    // Add headers to impersonate a web browser. Some web sites 
    // will not respond correctly without these headers
    wc.Headers.Add(&quot;User-Agent&quot;, &quot;Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12&quot;);
    wc.Headers.Add(&quot;Accept&quot;, &quot;*/*&quot;);
    wc.Headers.Add(&quot;Accept-Language&quot;, &quot;en-gb,en;q=0.5&quot;);
    wc.Headers.Add(&quot;Accept-Charset&quot;, &quot;ISO-8859-1,utf-8;q=0.7,*;q=0.7&quot;);
                
    urlData = wc.DownloadString(uri);

WebClient.DownloadString() returns string with peculiar characters

I&#39;m trying to get an ASP.NET MVC 3 site running on IIS 6.0. 

Currently when I request a page from the server it gives the following error:

&gt; Parser Error Message: This method cannot be called during the application&#39;s pre-start initialization stage.

on this line:

    &lt;add name=&quot;MyMembershipProvider&quot; type=&quot;NS.MyMembershipProvider&quot; connectionStringName=&quot;MyDatabase&quot; applicationName=&quot;/MySite&quot;/&gt;

I&#39;m completely stumped and don&#39;t have much of a clue about the ASP.NET application lifecycle, let alone the differences between 6.0 and 7.0. Reading through the MSDN pages on it hasn&#39;t seemed to help much. 

Does anyone have any insight or any good links for investigation? :)

ASP.NET: This method cannot be called during the application&#39;s pre-start initialization stage

I have the following two action methods (simplified for question):

    [HttpGet]
    public ActionResult Create(string uniqueUri)
    {
       // get some stuff based on uniqueuri, set in ViewData.  
       return View();
    }
    
    [HttpPost]
    public ActionResult Create(Review review)
    {
       // validate review
       if (validatedOk)
       {
          return RedirectToAction(&quot;Details&quot;, new { postId = review.PostId});
       }  
       else
       {
          ModelState.AddModelError(&quot;ReviewErrors&quot;, &quot;some error occured&quot;);
          return RedirectToAction(&quot;Create&quot;, new { uniqueUri = Request.RequestContext.RouteData.Values[&quot;uniqueUri&quot;]});
       }   
    }

So, if the validation passes, i redirect to another page (confirmation).

If an error occurs, i need to display the same page with the error.

If i do `return View()`, the error is displayed, but if i do `return RedirectToAction` (as above), it loses the Model errors.

I&#39;m not surprised by the issue, just wondering how you guys handle this?

I could of course just return the same View instead of the redirect, but i have logic in the &quot;Create&quot; method which populates the view data, which i&#39;d have to duplicate.

Any suggestions?

ASP.NET MVC - How to Preserve ModelState Errors Across RedirectToAction?

Can you give me any general advice on how to debug ASP.NET MVC Binding?

When everything works as expected, ASP.NET MVC is great. But if something does not, like something doesn&#39;t bind for some unknown reason, I find it hard to trace down the problem and find myself spending hours tracking down a seemingly simple problem.

Let&#39;s imagine you land in a controller method like this:

	[HttpPost]
	public ActionResult ShipmentDetails(Order order)
	{
        //do stuff
	}

Let&#39;s further imagine that the Order class looks like this:

    public class Order
    {
        public decimal Total {get; set;}
        public Customer Customer {get; set;}
    }

    public class Customer
    {
        public string Name {get; set;}
        public string Phone {get; set;}
    }


What are good places to start when `Order` in the controller method is not bound correctly? What are good places to start when only parts of the `Order` are bound correctly? 


Best practices for debugging ASP.NET MVC Binding

I am trying to export a list to a CSV file.
I got it all working up to the point I want to write to file to the response stream. This doesn&#39;t do anything.

Here is my code:

 Call the the method from the page.

    $(&#39;#btn_export&#39;).click(function () {
             $.post(&#39;NewsLetter/Export&#39;);
    });

The code in the controller is as follows:  

    [HttpPost]
            public void Export()
            {
                try
                {
                    var filter = Session[FilterSessionKey] != null ? Session[FilterSessionKey] as SubscriberFilter : new SubscriberFilter();
    
                    var predicate = _subscriberService.BuildPredicate(filter);
                    var compiledPredicate = predicate.Compile();
                    var filterRecords = _subscriberService.GetSubscribersInGroup().Where(x =&gt; !x.IsDeleted).AsEnumerable().Where(compiledPredicate).GroupBy(s =&gt; s.Subscriber.EmailAddress).OrderBy(x =&gt; x.Key);
    
                    ExportAsCSV(filterRecords);
                }
                catch (Exception exception)
                {
                    Logger.WriteLog(LogLevel.Error, exception);
                }
            }
    
            private void ExportAsCSV(IEnumerable&lt;IGrouping&lt;String, SubscriberInGroup&gt;&gt; filterRecords)
            {
                var sw = new StringWriter();
                //write the header
                sw.WriteLine(String.Format(&quot;{0},{1},{2},{3}&quot;, CMSMessages.EmailAddress, CMSMessages.Gender, CMSMessages.FirstName, CMSMessages.LastName));
    
                //write every subscriber to the file
                var resourceManager = new ResourceManager(typeof(CMSMessages));
                foreach (var record in filterRecords.Select(x =&gt; x.First().Subscriber))
                {
                    sw.WriteLine(String.Format(&quot;{0},{1},{2},{3}&quot;, record.EmailAddress, record.Gender.HasValue ? resourceManager.GetString(record.Gender.ToString()) : &quot;&quot;, record.FirstName, record.LastName));
                }
    
                Response.Clear();
                Response.AddHeader(&quot;Content-Disposition&quot;, &quot;attachment; filename=adressenbestand.csv&quot;);
                Response.ContentType = &quot;text/csv&quot;;
                Response.Write(sw);
                Response.End();
            }

But after `Response.Write(sw)` nothing is happening. Is it even possible to save a file this way?

Regards  

**Edit**  
The response headers I see when I click the button are:  

    HTTP/1.1 200 OK
    Cache-Control: private
    Content-Type: text/csv; charset=utf-8
    Server: Microsoft-IIS/7.5
    X-AspNetMvc-Version: 2.0
    Content-Disposition: attachment; filename=adressenbestand.csv
    X-Powered-By: ASP.NET
    Date: Wed, 12 Jan 2011 13:05:42 GMT
    Content-Length: 113
Which seem OK to me..

**Edit**  
I got rid of the jQuery part en replaced it by an hyperlink and this is working fine for me now:  

    &lt;a class=&quot;export&quot; href=&quot;NewsLetter/Export&quot;&gt;exporteren&lt;/a&gt;



Export to CSV using MVC, C# and jQuery

I&#39;m trying to implement a simple `ActionLink` that will delete records using ASP.NET MVC. This is what I have so far: 

    &lt;%= Html.ActionLink(&quot;Delete&quot;, 
                        &quot;Delete&quot;, 
                        new { id = item.storyId, 
                              onclick = &quot;return confirm(&#39;Are you sure?&#39;);&quot; 
                            })%&gt; 

However, it doesn&#39;t show the confirm box. Clearly I&#39;m missing something or I have incorrectly built the link. Can anyone help?

Delete ActionLink with confirm dialog

I have just deployed my asp.net mvc-2 website to a server (using dotnetpanel). But getting this error

    A default document is not configured for the requested URL, and directory browsing is not enabled on the server.

What settings I needs? Its dotnetpanel based hosting server.

A default document is not configured for the requested URL, and directory browsing is not enabled on the server

I have a custom asp.net mvc class validation attribute.
My question is how can I unit test it?
It would be one thing to test that the class has the attribute but this would not actually test that the logic inside it. This is what I want to test.

    [Serializable]
    [EligabilityStudentDebtsAttribute(ErrorMessage = &quot;You must answer yes or no to all questions&quot;)]
    public class Eligability
    {
        [BooleanRequiredToBeTrue(ErrorMessage = &quot;You must agree to the statements listed&quot;)]
        public bool StatementAgree { get; set; }

        [Required(ErrorMessage = &quot;Please choose an option&quot;)]
        public bool? Income { get; set; }
.....removed for brevity
    }




    [AttributeUsage(AttributeTargets.Class)]
    public class EligabilityStudentDebtsAttribute : ValidationAttribute
    {
        // If AnyDebts is true then 
        // StudentDebts must be true or false

        public override bool IsValid(object value)
        {
            Eligability elig = (Eligability)value;
            bool ok = true;
            if (elig.AnyDebts == true)
            {
                if (elig.StudentDebts == null)
                {
                    ok = false;
                }
            }
            return ok;

        }
    }

    

I have tried to write a test as follows but this does not work:

    [TestMethod]
    public void Eligability_model_StudentDebts_is_required_if_AnyDebts_is_true()
    {

       // Arrange
       var eligability = new Eligability();
       var controller = new ApplicationController();

       // Act
       controller.ModelState.Clear();
       controller.ValidateModel(eligability);
       var actionResult = controller.Section2(eligability,null,string.Empty);

       // Assert
       Assert.IsInstanceOfType(actionResult, typeof(ViewResult));
       Assert.AreEqual(string.Empty, ((ViewResult)actionResult).ViewName);
       Assert.AreEqual(eligability, ((ViewResult)actionResult).ViewData.Model);
       Assert.IsFalse(((ViewResult)actionResult).ViewData.ModelState.IsValid);
    }

The `ModelStateDictionary` does not contain the key for this custom attribute.
It only contains the attributes for the standard validation attributes.

Why is this?

What is the best way to test these custom attributes?



How can I unit test my custom validation attribute

I use the HTML Helpers to render my fields:

    &lt;%=Html.EditorFor(m =&gt; m.User.Surname)%&gt;

and the output would be something like this:

    &lt;input class=&quot;text-box single-line&quot; id=&quot;User_Surname&quot; 
              name=&quot;User.Surname&quot; type=&quot;text&quot; value=&quot;&quot; /&gt;

The helper uses the className + &#39;.&#39; &#232; fieldName to build the id.  
I need to pass the id to a jQuery function. Is there a way to have it without hardcoding it?
Maybe an helper which can use the ASP.NET MVC2 conventions?


How to get the HTML id generated by asp.net MVC EditorFor

I am retrieving two date time values from the database. Once the value is retrieved, I need the difference between the two values.
For that, I create a timespan variable to store the difference of the 2 date values.
     

    TimeSpan? variable = datevalue1 - datevalue2;

Now i need to show the difference which is stored in the Timespan variable in terms of number of hours.
I referred to [TimeSpan.TotalHours][1] but couldn&#39;t apply the same for some reason.
How do I do that?
I am using C# on a MVC project. I simple need to show the difference value in hours?

**EDIT:
Since timespan was nullable, i couldn&#39;t use the total hours property. Now I can use it by doing TimeSpanVal.Value.TotalHours**;


  [1]: http://msdn.microsoft.com/en-us/library/system.timespan.totalhours.aspx

Showing Difference between two datetime values in hours

I&#39;m currently developing a site using ASP.Net MVC3 with Razor. Inside the &quot;View/Shared&quot; folder, I want to add a subfolder called &quot;Partials&quot; where I can place all of my partial views (for the sake of organizing the site better.

I can do this without a problem as long as I always reference the &quot;Partials&quot; folder when calling the views (using Razor):

    @Html.Partial(&quot;Partials/{ViewName}&quot;)

My question is if there is a way to add the &quot;Partials&quot; folder to the list that .Net goes through when searching for a view, this way I can call my view without having to reference the &quot;Partials&quot; folder, like so:

    @Html.Partial(&quot;{ViewName}&quot;)

Thanks for the help!


Content Type	Original Author	Original Content on Stackoverflow
Question	Michel	View Question on Stackoverflow
Solution 1 - asp.net	Steve	View Answer on Stackoverflow
Solution 2 - asp.net	Nicholas Murray	View Answer on Stackoverflow
Solution 3 - asp.net	Yodacheese	View Answer on Stackoverflow
Solution 4 - asp.net	Hector Correa	View Answer on Stackoverflow
Solution 5 - asp.net	yoel halb	View Answer on Stackoverflow

mvc: does the favicon.ico also look for a controller?

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How do I know when I've stopped scrolling?

Python: Converting string into decimal number

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