I have a .txt file with a list of products. I need to add a project and use it but my file path doesn't work.
I've tried to add HttpContext.Current.Server.MapPath("~/ProductList.txt");
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Newtonsoft.Json;
namespace AmazHumanLibrary
{
public class ProductRepository
{
string FilePath = HttpContext.Current.Server.MapPath("~/ProductList.txt");
public List<Product> GetAll()
{
List<Product> products = new List<Product>();
if (!File.Exists(FilePath))
{
var stream = File.Create(FilePath);
stream.Close();
return products;
}
string fileContent = File.ReadAllText(FilePath);
if (string.IsNullOrEmpty(fileContent))
{
return products;
}
products = JsonConvert.DeserializeObject<List<Product>>(fileContent);
return products;
}
But I get the error " The name HttpContext does not exist in the current context".
Here is my project structure:
To access HttpContext outside of a Controller or Razor Page, one way is to inject IHttpContextAccessor into your class (Repository), something like this:
public class ProductRepository
{
public ProductRepository(IHttpContextAccessor httpContext)
{
_httpContextAccessor = httpContext;
}
private readonly IHttpContextAccessor _httpContextAccessor;
public List<Product> GetAll()
{
string filePath = _httpContextAccessor.HttpContext.Server.MapPath("~/ProductList.txt");
...
Official docs here.
I've done this before with MVC5 using User.Identity.GetUserId() but that doesn't seem to work here.
The User.Identity doesn't have the GetUserId() method.
I am using Microsoft.AspNet.Identity.
Update in ASP.NET Core Version >= 2.0
In the Controller:
public class YourControllerNameController : Controller
{
private readonly UserManager<ApplicationUser> _userManager;
public YourControllerNameController(UserManager<ApplicationUser> userManager)
{
_userManager = userManager;
}
public async Task<IActionResult> YourMethodName()
{
var userId = User.FindFirstValue(ClaimTypes.NameIdentifier) // will give the user's userId
var userName = User.FindFirstValue(ClaimTypes.Name) // will give the user's userName
// For ASP.NET Core <= 3.1
ApplicationUser applicationUser = await _userManager.GetUserAsync(User);
string userEmail = applicationUser?.Email; // will give the user's Email
// For ASP.NET Core >= 5.0
var userEmail = User.FindFirstValue(ClaimTypes.Email) // will give the user's Email
}
}
In some other class:
public class OtherClass
{
private readonly IHttpContextAccessor _httpContextAccessor;
public OtherClass(IHttpContextAccessor httpContextAccessor)
{
_httpContextAccessor = httpContextAccessor;
}
public void YourMethodName()
{
var userId = _httpContextAccessor.HttpContext.User.FindFirstValue(ClaimTypes.NameIdentifier);
}
}
Then you should register IHttpContextAccessor in the Startup class as follows:
public void ConfigureServices(IServiceCollection services)
{
services.TryAddSingleton<IHttpContextAccessor, HttpContextAccessor>();
// Or you can also register as follows
services.AddHttpContextAccessor();
}
For more readability write extension methods as follows:
public static class ClaimsPrincipalExtensions
{
public static T GetLoggedInUserId<T>(this ClaimsPrincipal principal)
{
if (principal == null)
throw new ArgumentNullException(nameof(principal));
var loggedInUserId = principal.FindFirstValue(ClaimTypes.NameIdentifier);
if (typeof(T) == typeof(string))
{
return (T)Convert.ChangeType(loggedInUserId, typeof(T));
}
else if (typeof(T) == typeof(int) || typeof(T) == typeof(long))
{
return loggedInUserId != null ? (T)Convert.ChangeType(loggedInUserId, typeof(T)) : (T)Convert.ChangeType(0, typeof(T));
}
else
{
throw new Exception("Invalid type provided");
}
}
public static string GetLoggedInUserName(this ClaimsPrincipal principal)
{
if (principal == null)
throw new ArgumentNullException(nameof(principal));
return principal.FindFirstValue(ClaimTypes.Name);
}
public static string GetLoggedInUserEmail(this ClaimsPrincipal principal)
{
if (principal == null)
throw new ArgumentNullException(nameof(principal));
return principal.FindFirstValue(ClaimTypes.Email);
}
}
Then use as follows:
public class YourControllerNameController : Controller
{
public IActionResult YourMethodName()
{
var userId = User.GetLoggedInUserId<string>(); // Specify the type of your UserId;
var userName = User.GetLoggedInUserName();
var userEmail = User.GetLoggedInUserEmail();
}
}
public class OtherClass
{
private readonly IHttpContextAccessor _httpContextAccessor;
public OtherClass(IHttpContextAccessor httpContextAccessor)
{
_httpContextAccessor = httpContextAccessor;
}
public void YourMethodName()
{
var userId = _httpContextAccessor.HttpContext.User.GetLoggedInUserId<string>(); // Specify the type of your UserId;
}
}
Until ASP.NET Core 1.0 RC1 :
It's User.GetUserId() from System.Security.Claims namespace.
Since ASP.NET Core 1.0 RC2 :
You now have to use UserManager.
You can create a method to get the current user :
private Task<ApplicationUser> GetCurrentUserAsync() => _userManager.GetUserAsync(HttpContext.User);
And get user information with the object :
var user = await GetCurrentUserAsync();
var userId = user?.Id;
string mail = user?.Email;
Note :
You can do it without using a method writing single lines like this string mail = (await _userManager.GetUserAsync(HttpContext.User))?.Email, but it doesn't respect the single responsibility principle. It's better to isolate the way you get the user because if someday you decide to change your user management system, like use another solution than Identity, it will get painful since you have to review your entire code.
you can get it in your controller:
using System.Security.Claims;
var userId = this.User.FindFirstValue(ClaimTypes.NameIdentifier);
or write an extension method like before .Core v1.0
using System;
using System.Security.Claims;
namespace Shared.Web.MvcExtensions
{
public static class ClaimsPrincipalExtensions
{
public static string GetUserId(this ClaimsPrincipal principal)
{
if (principal == null)
throw new ArgumentNullException(nameof(principal));
return principal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
}
}
}
and get wherever user ClaimsPrincipal is available :
using Microsoft.AspNetCore.Mvc;
using Shared.Web.MvcExtensions;
namespace Web.Site.Controllers
{
public class HomeController : Controller
{
public IActionResult Index()
{
return Content(this.User.GetUserId());
}
}
}
I included using System.Security.Claims and I could access the GetUserId() extension method
NB: I had the using Microsoft.AspNet.Identity already but couldn't get the extension method. So I guess both of them have to be used in conjunction with one another
using Microsoft.AspNet.Identity;
using System.Security.Claims;
EDIT:
This answer is now outdated. Look at Soren's or Adrien's answer for a dated way of achieving this in CORE 1.0
For .NET Core 2.0 Only The following is required to fetch the UserID of the logged-in User in a Controller class:
var userId = this.User.FindFirstValue(ClaimTypes.NameIdentifier);
or
var userId = HttpContext.User.FindFirstValue(ClaimTypes.NameIdentifier);
e.g.
contact.OwnerID = this.User.FindFirstValue(ClaimTypes.NameIdentifier);
As stated somewhere in this post, the GetUserId() method has been moved to the UserManager.
private readonly UserManager<ApplicationUser> _userManager;
public YourController(UserManager<ApplicationUser> userManager)
{
_userManager = userManager;
}
public IActionResult MyAction()
{
var userId = _userManager.GetUserId(HttpContext.User);
var model = GetSomeModelByUserId(userId);
return View(model);
}
If you started an empty project you might need to add the UserManger to your services in startup.cs. Otherwise this should already be the case.
you have to import Microsoft.AspNetCore.Identity & System.Security.Claims
// to get current user ID
var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
// to get current user info
var user = await _userManager.FindByIdAsync(userId);
For ASP.NET Core 2.0, Entity Framework Core 2.0, AspNetCore.Identity 2.0 api (https://github.com/kkagill/ContosoUniversity-Backend):
The Id was changed to User.Identity.Name
[Authorize, HttpGet("Profile")]
public async Task<IActionResult> GetProfile()
{
var user = await _userManager.FindByIdAsync(User.Identity.Name);
return Json(new
{
IsAuthenticated = User.Identity.IsAuthenticated,
Id = User.Identity.Name,
Name = $"{user.FirstName} {user.LastName}",
Type = User.Identity.AuthenticationType,
});
}
Response:
In .net core 3.1 (and other more recent versions), you can use:
private readonly UserManager<IdentityUser> _userManager;
public ExampleController(UserManager<IdentityUser> userManager)
{
_userManager = userManager;
}
Then:
string userId = _userManager.GetUserId(User);
Or async:
var user = await _userManager.GetUserAsync(User);
var userId = user.Id;
At this point, I'm trying to figure out why you'd use one over the other. I know the general benefits of async, but see both of these used frequently. Please post some comments if anyone knows.
For ASP.NET 5.0, I have an extension method as follow:
using System;
using System.ComponentModel;
using System.Security.Claims;
namespace YOUR_PROJECT.Presentation.WebUI.Extensions
{
public static class ClaimsPrincipalExtensions
{
public static TId GetId<TId>(this ClaimsPrincipal principal)
{
if (principal == null || principal.Identity == null ||
!principal.Identity.IsAuthenticated)
{
throw new ArgumentNullException(nameof(principal));
}
var loggedInUserId = principal.FindFirstValue(ClaimTypes.NameIdentifier);
if (typeof(TId) == typeof(string) ||
typeof(TId) == typeof(int) ||
typeof(TId) == typeof(long) ||
typeof(TId) == typeof(Guid))
{
var converter = TypeDescriptor.GetConverter(typeof(TId));
return (TId)converter.ConvertFromInvariantString(loggedInUserId);
}
throw new InvalidOperationException("The user id type is invalid.");
}
public static Guid GetId(this ClaimsPrincipal principal)
{
return principal.GetId<Guid>();
}
}
}
So you can use it like:
using Microsoft.AspNetCore.Mvc;
using YOUR_PROJECT.Presentation.WebUI.Extensions;
namespace YOUR_PROJECT.Presentation.WebUI.Controllers
{
public class YourController :Controller
{
public IActionResult YourMethod()
{
// If it's Guid
var userId = User.GetId();
// Or
// var userId = User.GetId<int>();
return View();
}
}
}
in the APiController
User.FindFirst(ClaimTypes.NameIdentifier).Value
Something like this you will get the claims
Although Adrien's answer is correct, you can do this all in single line. No need for extra function or mess.
It works I checked it in ASP.NET Core 1.0
var user = await _userManager.GetUserAsync(HttpContext.User);
then you can get other properties of the variable like user.Email. I hope this helps someone.
For getting current user id in razor views, we can inject UserManager in the view like this:
#inject Microsoft.AspNetCore.Identity.UserManager<ApplicationUser> _userManager
#{ string userId = _userManager.GetUserId(User); }
I hope you find it useful.
User.Identity.GetUserId();
does not exist in asp.net identity core 2.0. in this regard, i have managed in different way. i have created a common class for use whole application, because of getting user information.
create a common class PCommon & interface IPCommon
adding reference using System.Security.Claims
using Microsoft.AspNetCore.Http;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Threading.Tasks;
namespace Common.Web.Helper
{
public class PCommon: IPCommon
{
private readonly IHttpContextAccessor _context;
public PayraCommon(IHttpContextAccessor context)
{
_context = context;
}
public int GetUserId()
{
return Convert.ToInt16(_context.HttpContext.User.FindFirstValue(ClaimTypes.NameIdentifier));
}
public string GetUserName()
{
return _context.HttpContext.User.Identity.Name;
}
}
public interface IPCommon
{
int GetUserId();
string GetUserName();
}
}
Here the implementation of common class
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.Extensions.Logging;
using Pay.DataManager.Concreate;
using Pay.DataManager.Helper;
using Pay.DataManager.Models;
using Pay.Web.Helper;
using Pay.Web.Models.GeneralViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace Pay.Controllers
{
[Authorize]
public class BankController : Controller
{
private readonly IUnitOfWork _unitOfWork;
private readonly ILogger _logger;
private readonly IPCommon _iPCommon;
public BankController(IUnitOfWork unitOfWork, IPCommon IPCommon, ILogger logger = null)
{
_unitOfWork = unitOfWork;
_iPCommon = IPCommon;
if (logger != null) { _logger = logger; }
}
public ActionResult Create()
{
BankViewModel _bank = new BankViewModel();
CountryLoad(_bank);
return View();
}
[HttpPost, ActionName("Create")]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Insert(BankViewModel bankVM)
{
if (!ModelState.IsValid)
{
CountryLoad(bankVM);
//TempData["show-message"] = Notification.Show(CommonMessage.RequiredFieldError("bank"), "Warning", type: ToastType.Warning);
return View(bankVM);
}
try
{
bankVM.EntryBy = _iPCommon.GetUserId();
var userName = _iPCommon.GetUserName()();
//_unitOfWork.BankRepo.Add(ModelAdapter.ModelMap(new Bank(), bankVM));
//_unitOfWork.Save();
// TempData["show-message"] = Notification.Show(CommonMessage.SaveMessage(), "Success", type: ToastType.Success);
}
catch (Exception ex)
{
// TempData["show-message"] = Notification.Show(CommonMessage.SaveErrorMessage("bank"), "Error", type: ToastType.Error);
}
return RedirectToAction(nameof(Index));
}
}
}
get userId and name in insert action
_iPCommon.GetUserId();
Thanks,
Maksud
TLDR:
In the Controler add:
using System.Security.Claims;
and then you can use:
var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
endof TLDR;
Just an easy way in dot net 6 to test how to get the userID and test it in the default Blazor WebAssembly Core Hosted:
I added a String in WeatherForecast class named userId
public class WeatherForecast
{
public DateTime Date { get; set; }
public int TemperatureC { get; set; }
public string? Summary { get; set; }
public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
public string userId { get; set; } = "nope";
}
Then in the WeatherForecastController
I add
using System.Security.Claims;
In the GET method I set WeatherForecast.userId to User.FindFirstValue(ClaimTypes.NameIdentifier):
public IEnumerable<WeatherForecast> Get()
{
return Enumerable.Range(1, 5).Select(index => new WeatherForecast
{
Date = DateTime.Now.AddDays(index),
TemperatureC = Random.Shared.Next(-20, 55),
Summary = Summaries[Random.Shared.Next(Summaries.Length)],
userId = User.FindFirstValue(ClaimTypes.NameIdentifier)
})
.ToArray();
}
And finally in the FetchData.razor I modify the table to:
<table class="table">
<thead>
<tr>
<th>Date</th>
<th>Temp. (C)</th>
<th>Temp. (F)</th>
<th>Summary</th>
<th>User Id</th>
</tr>
</thead>
<tbody>
#foreach (var forecast in forecasts)
{
<tr>
<td>#forecast.Date.ToShortDateString()</td>
<td>#forecast.TemperatureC</td>
<td>#forecast.TemperatureF</td>
<td>#forecast.Summary</td>
<td>#forecast.userId</td>
</tr>
}
</tbody>
</table>
And then finally I get:
I hope it helps because in net core 6 sometimes it's quite difficult to find the answers
If you are using JWT tokens this code works:
User.FindFirstValue("sub");
use can use
string userid = User.FindFirst("id").Value;
for some reason NameIdentifier now retrieve the username (.net core 2.2)
Make sure that you have enable windows authentication. If you have anonymous authentication enabled you may be getting a null string.
https://learn.microsoft.com/en-us/aspnet/core/security/authentication/windowsauth?view=aspnetcore-3.1&tabs=visual-studio
I know there are many answers posted already, but maybe it will help someone as it did for me.
I mixed two solutions into one, and I am able to get the logged-in User and its Data.
I was using DotNet 5.
Following code, help to get the logged-in User.
var user = await _userManager.FindByNameAsync(HttpContext.User.Identity.Name);
I used the following package for _userManager
using Microsoft.AspNetCore.Identity;
And for HttpContext, I inherit my Controller from ControllerBase, and for ControllerBase Class I was using the following package
using Microsoft.AspNetCore.Mvc;
As an administrator working on other people's profile and you need to get the Id of the profile you are working on, you can use a ViewBag to capture the Id e.g ViewBag.UserId = userId; while userId is the string Parameter of the method you are working on.
[HttpGet]
public async Task<IActionResult> ManageUserRoles(string userId)
{
ViewBag.UserId = userId;
var user = await userManager.FindByIdAsync(userId);
if (user == null)
{
ViewBag.ErrorMessage = $"User with Id = {userId} cannot be found";
return View("NotFound");
}
var model = new List<UserRolesViewModel>();
foreach (var role in roleManager.Roles)
{
var userRolesViewModel = new UserRolesViewModel
{
RoleId = role.Id,
RoleName = role.Name
};
if (await userManager.IsInRoleAsync(user, role.Name))
{
userRolesViewModel.IsSelected = true;
}
else
{
userRolesViewModel.IsSelected = false;
}
model.Add(userRolesViewModel);
}
return View(model);
}
If you want this in ASP.NET MVC Controller, use
using Microsoft.AspNet.Identity;
User.Identity.GetUserId();
You need to add using statement because GetUserId() won't be there without it.
I'm using the latest version of WebApi and OData and everything is set up to work right. The only problem is when I try to use $select .
It throws the error bellow
Object of type 'System.Linq.EnumerableQuery`1[System.Web.OData.Query.Expressions.SelectExpandBinder+SelectAll`1[WebApplication1.Controllers.Person]]' cannot be converted to type 'System.Collections.Generic.IEnumerable`1[WebApplication1.Controllers.Person]'.
I looked at the documentation and their suggestion is to use [Queryable] on top of the Get method in the controller or the in WebApiConfig to use config.EnableQuerySupport and neither of these are available options. I'm currently using [EnableQuery]
EDIT
OdataController:
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using System.Web.OData;
using System.Xml.Serialization;
namespace WebApplication1.Controllers
{
public class PeopleController : ODataController
{
// GET api/values
[EnableQuery]
public IQueryable<Person> Get()
{
return new Person[] { new Person()
{
Id = 1,
FirstName = "Testing",
LastName = "2"
}, new Person()
{
Id = 2,
FirstName = "TestTest",
LastName = "3"
} }.AsQueryable();
}
// GET api/values/5
public Person Get(int id)
{
return new Person()
{
Id = 3,
FirstName = "Test",
LastName = "1"
};
}
// POST api/values
public void Post([FromBody]Person value)
{
}
// PUT api/values/5
public void Put(int id, [FromBody]Person value)
{
}
// DELETE api/values/5
public void Delete(int id)
{
}
}
public class Person
{
[Key]
public int Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
}
}
WebApiConfig
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http;
using System.Web.OData;
using System.Web.OData.Builder;
using System.Web.OData.Extensions;
using System.Web.OData.Formatter;
using WebApplication1.Controllers;
namespace WebApplication1
{
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
// Web API configuration and services
// Web API routes
config.MapHttpAttributeRoutes();
var odataFormatters = ODataMediaTypeFormatters.Create();
config.Formatters.InsertRange(0, odataFormatters);
ODataModelBuilder builder = new ODataConventionModelBuilder();
builder.EntitySet<Person>("People");
config.AddODataQueryFilter();
config.MapODataServiceRoute(
routeName: "ODataRoute",
routePrefix: "api",
model: builder.GetEdmModel());
}
}
}
UPDATE 2
seems to only throw an error retrieving the data in xml format. Json seems to work
This is a known limitation of the XmlMediaTypeFormatter class from the System.Net.Formatting Nuget package. The implementation of the JSON formatter does support the $select and $expand commands but these are not available when content negotiation determines that XML should be returned.
You should look into implementing OData endpoints (as opposed to WebAPI endpoints) should you need to return XML formatted responses. More information on how this can be done can be found here:
http://www.asp.net/web-api/overview/odata-support-in-aspnet-web-api/supporting-odata-query-options
Found a solution. It isn't perfect but it does work!
Maybe it will be useful for someone because I've spent on it few hours of research and trying.
Step #1 create custom xml formatter:
public class CustomXmlFormatter : MediaTypeFormatter
{
private JsonMediaTypeFormatter jFormatter = null;
public CustomXmlFormatter(JsonMediaTypeFormatter jFormatter)
{
SupportedMediaTypes.Add(new System.Net.Http.Headers.MediaTypeHeaderValue("application/xml"));
this.jFormatter = jFormatter;
}
public override bool CanReadType(Type type)
{
return false;
}
public override bool CanWriteType(Type type)
{
return true;
}
public override Task WriteToStreamAsync(Type type, object value, System.IO.Stream writeStream, System.Net.Http.HttpContent content, System.Net.TransportContext transportContext)
{
return Task.Factory.StartNew(() =>
{
using (MemoryStream ms = new MemoryStream())
{
var tsk = jFormatter.WriteToStreamAsync(type, value, ms, content, transportContext);
tsk.Wait();
ms.Flush();
ms.Seek(0, SeekOrigin.Begin);
var xDoc = XDocument.Load(JsonReaderWriterFactory.CreateJsonReader(ms, new XmlDictionaryReaderQuotas()));
using (XmlWriter xw = XmlWriter.Create(writeStream))
{
xDoc.WriteTo(xw);
}
}
});
}
}
Step #2 register it in startup section:
var formatters = ODataMediaTypeFormatters.Create();
var jsonFormatter = config.Formatters.JsonFormatter;
var customXmlFormatter = new CustomXmlFormatter(jsonFormatter);
customXmlFormatter.AddQueryStringMapping("$format", "cxml", "application/xml");
config.Formatters.Add(customXmlFormatter);
use it as
http://url..../actionName?$format=cxml&$select=ObjectName,ObjectId
I'm trying to implement a JSONP response in my ASP.NET MVC 5 web application. I've followed this tutorial:
http://www.ingeniumweb.com/blog/post/using-jsonp-calls-in-asp.net-mvc/1216/
The problem is that the ExecuteResult method is never called:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Script.Serialization;
namespace subscribe.ActionResults
{
public class JsonpResult : JsonResult
{
object Data = null;
public JsonpResult()
{
}
public JsonpResult(object Data)
{
this.Data = Data;
}
public override void ExecuteResult(ControllerContext ControllerContext)
{
if (ControllerContext != null)
{
HttpResponseBase Response = ControllerContext.HttpContext.Response;
HttpRequestBase Request = ControllerContext.HttpContext.Request;
string callbackfunction = Request["callback"];
if (string.IsNullOrEmpty(callbackfunction))
{
throw new Exception("Callback function name must be provided in the request!");
}
Response.ContentType = "application/x-javascript";
if (Data != null)
{
JavaScriptSerializer serializer = new JavaScriptSerializer();
Response.Write(string.Format("{0}({1});", callbackfunction, serializer.Serialize(Data)));
}
}
}
}
}
In my controller I have:
public JsonpResult Get(string emailaddress, string callback, string jsonp)
{
var slist = from u in db.subscriptions
select u;
if (!String.IsNullOrEmpty(emailaddress))
slist = slist.Where(s => (s.emailaddress == emailaddress));
if (slist.Count() > 0)
{
JsonpResult result = new JsonpResult(slist.ToList());
return result; //json list of matches
}
else
{
JsonpResult result = new JsonpResult(new List<Subscription>());
return result; //empty json list
}
}
I am adding a WebForm from which I would like to resolve routes to URLs. For example, in MVC I would just use
return RedirectToAction("Action", "Controller");
So, if you have a way of getting to that same URL from a WebForm in the same application, it would be appreciated.
Try something like this in your Webform:
<% var requestContext = new System.Web.Routing.RequestContext(
new HttpContextWrapper(HttpContext.Current),
new System.Web.Routing.RouteData());
var urlHelper = new System.Web.Mvc.UrlHelper(requestContext); %>
<%= urlHelper.RouteUrl(new { controller = "Controller", action = "Action" }) %>
Revised version of the code above for PageCommon ... as it currently is it breaks.
public static class MvcPages{
public static UrlHelper GetUrlHelper(this System.Web.UI.Control c)
{
var helper = new System.Web.Mvc.UrlHelper(c.Page.Request.RequestContext);
return helper;
}
public static HtmlHelper GetHtmlHelper(this System.Web.UI.Control c)
{
var httpContext = new HttpContextWrapper(HttpContext.Current);
var controllerContext = new ControllerContext(httpContext, new RouteData(), new DummyController());
var viewContext = new ViewContext(controllerContext, new WebFormView(controllerContext, "View"), new ViewDataDictionary(), new TempDataDictionary(), TextWriter.Null);
var helper = new HtmlHelper(viewContext, new ViewDataBag());
return helper;
}
private class ViewDataBag : IViewDataContainer
{
ViewDataDictionary vdd = new ViewDataDictionary();
public ViewDataDictionary ViewData
{
get
{
return vdd;
}
set
{
vdd = value;
}
}
}
private class DummyController : Controller
{
}
}
If you want to stay away from any MVC dependencies then this is the solution I came up with. It's very close to the accepted answer. I have a class my webform pages inherit and this UrlHelper is available in the ASPX pages.
using System.Net.Http;
using System.Web;
using System.Web.Http.Routing;
public class ClassOtherPagesInherit {
public UrlHelper Url = new UrlHelper(new HttpRequestMessage(new HttpMethod(HttpContext.Current.Request.HttpMethod), HttpContext.Current.Request.Url));
}
Then you can call this UrlHelper object like this
<%Url.Route("string", new {}) %>
For those looking for an actual HtmlHelper or a cleaner way to use the urlHelper in a page:
public static class PageCommon
{
public static System.Web.Mvc.UrlHelper GetUrlHelper(this System.Web.UI.Control c)
{
var helper = new System.Web.Mvc.UrlHelper(c.Page.Request.RequestContext);
return helper;
}
class ViewDataBag : IViewDataContainer
{
ViewDataDictionary vdd = new ViewDataDictionary();
public ViewDataDictionary ViewData
{
get
{
return vdd;
}
set
{
vdd = value;
}
}
}
public static System.Web.Mvc.HtmlHelper GetHtmlHelper(this System.Web.UI.Control c)
{
var v = new System.Web.Mvc.ViewContext();
var helper = new System.Web.Mvc.HtmlHelper(v, new ViewDataBag());
return helper;
}
}