MVC extension method error - asp.net-mvc-3

Hi i've got an extension method in my PagingHelpers class:
namespace SportsStore.WebUI.HtmlHelpers
{
public static class PagingHelpers
{
public static MvcHtmlString PageLinks(this HtmlHelper html,
PagingInfo pagingInfo,
Func<int, string> pageUrl)
{
StringBuilder result = new StringBuilder();
for (int i = 1; i < pagingInfo.TotalPages; i++)
{
TagBuilder tag = new TagBuilder("a");
tag.MergeAttribute("href", pageUrl(i));
tag.InnerHtml = i.ToString();
if (i == pagingInfo.CurrentPage)
tag.AddCssClass("selected");
result.Append(tag.ToString());
}
return MvcHtmlString.Create(result.ToString());
}
}
}
here i call extension method in the List.cshtml:
#Html.PageLinks(Model.PagingInfo, x => Url.Action("List", new {page = x}))
And I got this error:
'System.Web.Mvc.HtmlHelper'
does not contain a definition for 'PageLinks' and no extension method
'PageLinks' accepting a first argument of type
'System.Web.Mvc.HtmlHelper'
could be found (are you missing a using directive or an assembly
reference?)
I added the namespace in the web.config inside the Views Folder:
<pages>
<namespaces>
<add namespace="System.Web.Helpers" />
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Routing" />
<add namespace="System.Web.WebPages"/>
<add namespace="SportsStore.WebUI.HtmlHelpers"/>**
</namespaces>
</pages>
Please help me, I don't know how could I solve this problem

Try adding
#using SportsStore.WebUI.HtmlHelpers;
to the top of your .cshtml file
your namespace approach should work as well, so try to shut down the server rebuild your solution and run again

It appears you have added the namespace reference to the root web.config file.
If you are using MVC3 with the Razor view engine, you have to add the namespace reference to the Views\web.config file. Then it will be globally available to all views within the View folder.
<system.web.webPages.razor>
<host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.Mvc.WebViewPage">
<namespaces>
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Routing" />
<add namespace="SportsStore.WebUI.HtmlHelpers"/>
</namespaces>
</pages>
</system.web.webPages.razor>

It seems you did everything correctly.
Did you compile your web project before trying to use the Html helper?

You need to add in your List.cshtml above the code this line
#model SportsStore.WebUI.Models.ProductsListViewModel

Related

register dll in mvc razor view

In web forms we can write this code above the page:
<%# Register Assembly="xxx.CaptchaGenerator"
Namespace="xxx.CaptchaGenerator" TagPrefix="mycaptcha" %>
Then it can be used:
<mycaptcha:CaptchaControl ID="ccJoin"
runat="server" CaptchaHeight="31" CaptchaLength="5" />
How can I do this in mvc3, razor? I use this syntax #Using xxx.CaptchaGenerator and add this lines in my web config :
<pages>
<namespaces>
<add namespace="xxx.CaptchaGenerator" />
<add namespace="System.Web.Helpers" />
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Routing" />
<add namespace="System.Web.WebPages"/>
</namespaces>
</pages>
but it did not work.
You could add namespaces to the ~/Views/web.config, not ~/web.config. For example:
<system.web.webPages.razor>
<host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.Mvc.WebViewPage">
<namespaces>
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Routing" />
<add namespace="xxx.CaptchaGenerator" />
</namespaces>
</pages>
</system.web.webPages.razor>
as i know cant use the server control in view(razorengine)..
you can use aspx file and then call it in your parent view with html.partial(aspx fileName)
i know this not a good solution and maybe not correct answer but its useful dear mohsen
شاید راه دیگه ایم باشه

Html.BeginForm() with Razor Generator

I am making a Helper with razor generator to build a cutom control in which there will be two radio buttons (yes/no)
I want to use Html.BeginForm for this.
But can't do it.
Do you know how to do it or another way to do it ?
Thanks.
Edit :
When I put this code
#using (Html.BeginForm()) {
<input type="radio"/>
<input type="radio"/>
}
I get this error
'System.Web.WebPages.HtmlHelper' does not contain a definition for BeginForm and no extension method
'BeginForm' accepting a first argument of type 'System.Web.WebPages.Html.HtmlHelper'could be found
It's most likely a namespacing or reference issue.
First, check to make sure that System.Web.WebPages shows up in your project references. Then add
#using System.Web.WebPages
to the top of your view. If that fixes it, you can move the reference into the web.config per this answer on the same type of topic
Add this code to your helper function when your helper functions are located in the App_Code folder.
var Html = ((System.Web.Mvc.WebViewPage)WebPageContext.Current.Page).Html;
var Ajax = ((System.Web.Mvc.WebViewPage)WebPageContext.Current.Page).Ajax;
Don't forget to include the right namespaces in the file: #using ....
For me it was a missing namespace, yes, but not the one mentioned by eouw0o83hf:
#using System.Web.Mvc.Html;
Please post your code when you ask a question so we can see what you're doing wrong. Try this:
#using (Html.BeginForm()) {
<input type="radio"/>
<input type="radio"/>
}
I ran into the same issue and just solved it. I changed version in the web.config file under the views folder.
Here is my previous code
<system.web.webPages.razor>
<host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, **Version=5.0.2.2**, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.Mvc.WebViewPage">
<namespaces>
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Optimization"/>
<add namespace="System.Web.Routing" />
<add namespace="CMSSol" />
</namespaces>
</pages>
and here is my new code
<system.web.webPages.razor>
<host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, **Version=5.0.0.0**, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.Mvc.WebViewPage">
<namespaces>
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Optimization"/>
<add namespace="System.Web.Routing" />
<add namespace="CMSSol" />
</namespaces>
</pages>

How to register assembly in Razor view engine

How can i insert this in razor view page
<%# Register Assembly="System.Web.Silverlight" Namespace="System.Web.UI.SilverlightControls"
TagPrefix="asp" %>
<asp:ScriptManager runat="server" ID="MainScriptManager" />
You can put it in the Web.Config that exists in your Views folder. It took me a while to figure this one out hope this helps.
<system.web>
<controls>
<add assembly="System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" namespace="System.Web.Mvc" tagPrefix="mvc" />
<add assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagPrefix="ajaxToolkit" />
</controls>
</system.web>
You cannot. You are using ASPX markup in your example. In razor you can write:
#using System.Web.Silverlight;
btw. check this syntax quickref:
you can try #using Namespace; where Namespace is what you need
To add new register in MVC, you can put in the web.config:
<configuration>
<system.web>
<pages>
<controls>
<add assembly="System.Web.Silverlight" namespace="System.Web.UI.SilverlightControls" tagPrefix="asp" />
</controls>
</pages>
</system.web>
</configuration>

MVC3 doesn't recognize MvcContrib namespace in Razor View

I'm trying to paginate something with MvcContrib's Html.Pager(), but my razor views can't reference the right namespace.
Controller is ok:
using MvcContrib.Pagination;
...
public ActionResult List(int? page)
{
return View(new UserRepository().GetUserList().AsPagination(page ?? 1, 10));
}
But, the view can't make sense of either:
#using MvcContrib
OR
#Html.Pager((IPagination)Model)
I installed MvcContrib via NuGet. I tried adding MvcContrib, MvcContrib.UI and MvcContrib.UI.Html namespaces to <pages><namespaces> in web.config with no luck. Did I miss something?
Contrary to WebForms, Razor doesn't use the <namespaces> section in ~/web.config. It uses the <namespaces> in ~/Views/web.config:
<system.web.webPages.razor>
<host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.Mvc.WebViewPage">
<namespaces>
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Routing" />
<add namespace="MvcContrib"/>
<add namespace="MvcContrib.UI.Grid"/>
<add namespace="MvcContrib.UI.Pager"/>
</namespaces>
</pages>
</system.web.webPages.razor>
and then:
#model MvcContrib.Pagination.IPagination<SomeViewModel>
#Html.Pager(Model)
or you could also add the proper namespace to your view if you prefer:
#model MvcContrib.Pagination.IPagination<SomeViewModel>
#using MvcContrib.UI.Pager
#Html.Pager(Model)
After adding MvcContrib.dll reference, try this code.
#using MvcContrib.UI.Pager
#using MvcContrib.Pagination
#model IPagination
#Html.Pager(Model)
I posted MvcContrib Grid paging,filtering + MVC3 Razor sample article to my blog.

InvalidOperationException thrown regarding DotNetOpenAuth.IEmbeddedResourceRetrieval with Razor view

When my Razor view calls #Html.OpenIdSelector(... I get an InvalidOperationException:
The current IHttpHandler is not one of
types: System.Web.UI.Page,
DotNetOpenAuth.IEmbeddedResourceRetrieval.
An embedded resource URL provider must
be set in your .config file.
What exactly should I set in the config file?
Just NuGet the DotNetOpenAuth package. It will setup everything you need in your config file:
Right click on the References of your web project in the solution explorer
Add Library Package Reference...
Click on the Online tab.
In the search box type dotnetopenauth
Click Install
Everything will be automatically setup and the correct assemblies will be downloaded from the internet and added as reference.
Here's how the web.config file looks like after performing this:
<?xml version="1.0" encoding="utf-8"?>
<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=152368
-->
<configuration>
<configSections>
<section name="uri" type="System.Configuration.UriSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
<section name="dotNetOpenAuth" type="DotNetOpenAuth.Configuration.DotNetOpenAuthSection" requirePermission="false" allowLocation="true" />
</configSections>
<connectionStrings>
<add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient" />
</connectionStrings>
<appSettings>
<add key="ClientValidationEnabled" value="true" />
<add key="UnobtrusiveJavaScriptEnabled" value="true" />
</appSettings>
<system.web>
<compilation debug="true" targetFramework="4.0">
<assemblies>
<add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.WebPages, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</assemblies>
</compilation>
<authentication mode="Forms">
<forms loginUrl="~/Account/LogOn" timeout="2880" />
</authentication>
<membership>
<providers>
<clear />
<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" />
</providers>
</membership>
<profile>
<providers>
<clear />
<add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" />
</providers>
</profile>
<roleManager enabled="false">
<providers>
<clear />
<add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" />
<add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" />
</providers>
</roleManager>
<pages>
<namespaces>
<add namespace="System.Web.Helpers" />
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Routing" />
<add namespace="System.Web.WebPages" />
</namespaces>
</pages>
</system.web>
<system.webServer>
<validation validateIntegratedModeConfiguration="false" />
<modules runAllManagedModulesForAllRequests="true" />
</system.webServer>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="3.0.0.0" />
<bindingRedirect oldVersion="1.0.0.0" newVersion="2.0.0.0" />
</dependentAssembly>
</assemblyBinding>
<legacyHMACWarning enabled="0" />
</runtime>
<uri>
<!-- The uri section is necessary to turn on .NET 3.5 support for IDN (international domain names),
which is necessary for OpenID urls with unicode characters in the domain/host name.
It is also required to put the Uri class into RFC 3986 escaping mode, which OpenID and OAuth require. -->
<idn enabled="All" />
<iriParsing enabled="true" />
</uri>
<system.net>
<defaultProxy enabled="true" />
<settings>
<!-- This setting causes .NET to check certificate revocation lists (CRL)
before trusting HTTPS certificates. But this setting tends to not
be allowed in shared hosting environments. -->
<!--<servicePointManager checkCertificateRevocationList="true"/>-->
</settings>
</system.net>
<dotNetOpenAuth>
<!-- This is an optional configuration section where aspects of dotnetopenauth can be customized. -->
<!-- For a complete set of configuration options see http://www.dotnetopenauth.net/developers/code-snippets/configuration-options/ -->
<openid>
<relyingParty>
<security requireSsl="false" />
<behaviors>
<!-- The following OPTIONAL behavior allows RPs to use SREG only, but be compatible
with OPs that use Attribute Exchange (in various formats). -->
<add type="DotNetOpenAuth.OpenId.Behaviors.AXFetchAsSregTransform, DotNetOpenAuth" />
</behaviors>
</relyingParty>
</openid>
<messaging>
<untrustedWebRequest>
<whitelistHosts>
<!-- Uncomment to enable communication with localhost (should generally not activate in production!) -->
<!--<add name="localhost" />-->
</whitelistHosts>
</untrustedWebRequest>
</messaging>
<!-- Allow DotNetOpenAuth to publish usage statistics to library authors to improve the library. -->
<reporting enabled="true" />
</dotNetOpenAuth>
</configuration>
UPDATE:
You could implement a custom resource retrieval provider:
public class CustomResourceProvider : IEmbeddedResourceRetrieval
{
public Uri GetWebResourceUrl(Type someTypeInResourceAssembly, string manifestResourceName)
{
return new Uri("http://www.google.com");
}
}
and then register it in web.config:
<dotNetOpenAuth>
<webResourceUrlProvider type="AppName.CustomResourceProvider, AppName" />
...
</dotNetOpenAuth>
But I would recommend you using the openid-selector library for generating login forms.
I came across this problem when I was trying to get the NerdDinner OpenID working for MVC3/razor. The solution that has worked for me is:
Create this class in your solution: (this was found in one of the NerdDinner builds - http://nerddinner.codeplex.com/SourceControl/changeset/view/55257#1328982 (thanks to JasonHaley)
for some reason, this file isn't in the latest build for NerdDinner MVC3/Razor
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using DotNetOpenAuth;
namespace <Your App>.Services
{
public class EmbeddedResourceUrlService : IEmbeddedResourceRetrieval
{
private static string pathFormat = "{0}/{1}/Resource/GetWebResourceUrl?assemblyName={2}&typeName={3}&resourceName={‌​4}";
//private static string pathFormat = "{0}/Resource/GetWebResourceUrl";
public Uri GetWebResourceUrl(Type someTypeInResourceAssembly, string manifestResourceName)
{
if (manifestResourceName.Contains("http"))
{
return new Uri(manifestResourceName);
}
else
{
var assembly = someTypeInResourceAssembly.Assembly;
// HACK
string completeUrl = HttpContext.Current.Request.Url.ToString();
string host = completeUrl.Substring(0,
completeUrl.IndexOf(HttpContext.Current.Request.Url.AbsolutePath));
var path = string.Format(pathFormat,
host,
HttpContext.Current.Request.ApplicationPath.Substring(1),
HttpUtility.UrlEncode(assembly.FullName),
HttpUtility.UrlEncode(someTypeInResourceAssembly.ToString()),
HttpUtility.UrlEncode(manifestResourceName));
return new Uri(path);
}
}
}
}
Then in your web.config, add this line:
<webResourceUrlProvider type="<Your App>.Services.EmbeddedResourceUrlService, <Your App>" />
just put in the DotNetOpenAuth section
you will also need this route set up: ( Html.OpenIdSelectorScripts helper method throwing NullReferenceException )
routes.MapRoute(
"OpenIdDiscover",
"Auth/Discover"
);

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