I'm facing a strange type of issue.
In my VS Solution I have 3 projects.
ASP.Net App
C# Class Library (Used as my DAL and contains a EF .edmx file.
Windows Service App
The ASP.Net App can succesffully access the the EF Model and I can use either classic Linq or Lambda .First() etc. Everything works fine.
On my Windows Service App, I've added a reference to the DAL DLL , but for some reason, the Intellisense does not show up when I type in any code files in the windows service library. Example of my code below :
using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;
namespace alertservice
{
class AlertPolling
{
dal.applicationEntities ent;
public AlertPolling()
{
ent = new dal.applicationEntities();
ent.Queries. // <--- ZERO INTELLISENSE HAPPENING HERE.
}
public void StartPolling()
{
}
}
}
Thanks guys. I managed to fix the problem by following the comments from flipchart.
I added a reference to System.Data.Entity which fixed it. Intellisense now coming up.
Related
I followed the documentation on testing on the MvvmCross website. I'am able to register my mock dispatcher and everything works except when any of my view models executes ShowViewModel. This gives me a System.MissingMethodException.
My test class is a class library (.Net 4.5).
I have a WPF application, and everything works fine in there. But for some reason, my test class library gives me this problem. I've removed/reinstalled all NuGet packages, unchecked/checked all references to my PCL where the view models I'm testing are located.
1) Why am I getting this exception?
1.1) Could it be some dll that I'm missing?
2) Where is the actual concrete definition for ShowViewModel? The only reference I can find is in MxvNavigationObject, but that's an abstract class.
Is your Viewmodel class (where I hope you are trying to call it) inheriting from MvxViewModel? as that is where the ShowViewModel method is (via MvxNavigatingObject)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MvvmCross.Core.ViewModels;
namespace App1.ViewModels
{
public class MainViewModel : MvxViewModel
{
public MainViewModel()
{
ShowViewModel(typeof(SecondViewModel));
}
}
}
I have created basic MVC application in asp.net core with Visual Studio 2017.
I got an error when trying to render index.cshtml
An error occurred during the compilation of a resource required to process this request. Please review the following specific error details and modify your source code appropriately.
Generated Code
One or more compilation references are missing. Possible causes
include a missing 'preserveCompilationContext' property under
'buildOptions' in the application's project.json.
The type or namespace name 'System' could not be found (are you
missing a using directive or an assembly reference?)
+
using System;
...
My whole console application is as short as it can be:
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.IO;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
var host = new WebHostBuilder()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseKestrel()
.UseStartup<Startup>()
.Build();
host.Run();
}
}
class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc();
}
public void Configure(IApplicationBuilder app)
{
app.UseDeveloperExceptionPage();
app.UseMvc();
}
}
public class HomeController : Controller
{
[HttpGet("/")]
public ActionResult Index()
{
ViewBag.Message = "Hello world!";
ViewBag.Time = DateTime.Now;
return View();
}
}
}
Structure of my "project"
View
It's funny because the error tells me that I have to change something in project.json, but since Visual Studio 2017 there is no project.json anymore.
My view is in fact simple static html file and does not require any references to models or anything. But errors are complaining about missing types:
I tried to compare my project to web application template but I havent found what's causing razor views not to build in console application.
What am I missing here?
Try adding
<PropertyGroup>
<PreserveCompilationContext>true</PreserveCompilationContext>
</PropertyGroup>
to your csproj. And to avoid such mistakes next time, please use the ASP.NET Core templates you can find when you create a new project. They have the necessary stuff and commonly used packages added to it's csproj.
There is a different SDK to use.
Console Apps use: Microsoft.NET.Sdk
Web Apps use: Microsoft.NET.Sdk.Web
This can be updated in your *.csproj
Trying to create a web service to use Petapoco, I have created the following in a cs file in App_code
using System;
using Umbraco.Core;
using Umbraco.Core.Persistence;
namespace utData{
public class MyDB{
public string demo(){
var dataContext = new PetaPoco.Database("umbracoDbDSN");
return "demo - OK";
}
}
}
However, using this from a web service call results in
CS0246: The type or namespace name 'PetaPoco' could not be found (are you missing a using directive or an assembly reference?)
var dataContext = new PetaPoco.Database("umbracoDbDSN");
Any way to fix this?
Umbraco wraps its use of PetaPoco, so if you want "clean" and separate use of PetaPoco, you will need to reference it in your project or in your case (when not compiling) place PetaPoco DLL(s?) in the bin folder.
Or you could google PetaPoco Umbraco and see how PetaPoco is used in Umbraco context. According to http://www.wiliam.com.au/wiliam-blog/using-petapoco-with-umbraco-is-pretty-sweet it goes something like this (for your example):
var db = applicationContext.DatabaseContext.Database;
// or ApplicationContext.Current.DatabaseContext.Database
if (!db.TableExist("blahblah"))
{
db.CreateTable(false);
}
I create cross-platform project Xamarin.Forms (shared) in Visual Studio 2015, add one page; and I need SHA256CryptoServiceProvider, but i have a problem:
"Error CS0246: The type or namespace name 'SHA256CryptoServiceProvider' could not be found (are you missing a using directive or an assembly reference?)"
MD5CryptoServiceProvider - working good.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Security.Cryptography;
using Xamarin.Forms;
namespace App1
{
public partial class Page1 : ContentPage
{
public Page1 ()
{
InitializeComponent ();
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
SHA256CryptoServiceProvider sha256 = new SHA256CryptoServiceProvider();
}
}
}
It is because this class... really doesn't exist. Why? Using Xamarin, you are using portable .NET which lacks some of the full .NET features. I'm afraid you need to use some external libraries like PCLCrypto to fulfill your needs, or implement it by yourself (this is what I've done when I needed hash function in my Xamarin App)
I'm using AttributeRouting in my Web API project. I've installed the AttributeRouting for Web API. I want to define an Enum route constraint so I setup my AttributeRoutingHttpConfig config as follows:
using System.Reflection;
using System.Web.Http;
using AttributeRouting.Web.Http.Constraints;
using AttributeRouting.Web.Http.WebHost;
using MyProject.Data.Models;
[assembly: WebActivator.PreApplicationStartMethod(typeof(PhantasyTour.AttributeRoutingHttpConfig), "Start")]
namespace MyProject
{
public static class AttributeRoutingHttpConfig
{
public static void RegisterRoutes(HttpRouteCollection routes)
{
routes.MapHttpAttributeRoutes(
config =>
{
config.AddRoutesFromAssembly(Assembly.GetExecutingAssembly());
config.InlineRouteConstraints.Add("ListType", typeof(EnumRouteConstraint<ListType>));
});
}
public static void Start()
{
RegisterRoutes(GlobalConfiguration.Configuration.Routes);
}
}
}
When I fire up my application I immediately receive the following error:
The constraint "AttributeRouting.Web.Http.Constraints.EnumRouteConstraint`1[[MyProject.Data.Models.ListType, MyProject.Data, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]" must implement System.Web.Routing.IRouteConstraint
I've looked at the source code for the AttributeRouting.Web.Http.Constraints.EnumRouteConstraint and confirmed that it implements IHttpRouteConstraint which presumably is the WebAPI equivalent of IRouteConstraint in the MVC namespace.
Does anyone know what I'm doing wrong and how I can get this working?
UPDATE:
I attempted to create a completely blank Web Application and add only WebAPI and AttributeRouting for WebAPI references. Despite having absolutely no references to MVC assemblies, I still receive the same error message. I did discover however that there is another EnumRouteConstraint found in the AttributeRouting.Web.Constraints namespace which works perfectly. It doesn't appear to be MVC specific since it is located in the Core AttributeRouting assembly. I would love to know why there are two different EnumRouteConstraint classes when only one of them works. But that is a question for another time.
It is interesting that the exception you get refers to the MVC interface from the namespace System.Web.Routing.
I would take it as a clue and look at all the references in your project, any place in the config where MVC Routes and Http Routes could have been mixed up.
If possible and if you have any at all, try removing all references to MVC (or System.Web.Routing for a start), and MVC flavour of attribute routing (if it's a separate dll).