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If you dont have one, use following static ConcurrentDictionary example as a simplest thread safe solution. Each team and project has their own caching frameworks and conventions therefore making it impossible to have builtin solution for all possible needs. Provides interfaces, abstractions and common functions to support working with Web Services. There’s a working example for .NET Core 1.0 at aspnet/Entropy/samples/Mvc.RenderViewToString. Since this might change or go away, I’ll detail the approach I’m using in my own applications here. Find centralized, trusted content and collaborate around the technologies you use most.

Embedded logic, such as iteration and conditional branching, is a compelling feature to have at your disposal. If you want to script to be executed, then you can use the @html.raw method to print out the unencoded string as shown below. If Condition is used to render a section based on a condition as shown below. The @ in the email address is correctly identifies by the Razor engine and does not to treat the @ as a code delimiter. In the following example, the code @greeting,  @DateTime.Now,  @WeekDay are treated as Implicit Razor expressions. Space is not allowed in the Code expression, as it is used to identify the end of the expression.

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You can also work with third party view engines, such as Spark, SharpDOM, and NDjango, in ASP.NET Core MVC. I’ll demonstrate how to create a custom view engine in ASP.NET Core MVC in a later post here. You can replace or add to the physical file provider in the razor view options setup with your own custom provider to load views from database, web service call, etc.

You should either pick one of the available implementations or write your own. This time when debugging the template you will jump right into the template file. The Variables are declared using the var keyword or using the c# data type.

What is View Engine

Use Razor to build templates from Files / EmbeddedResources / Strings / Database or your custom source outside of ASP.NET MVC. No redundant dependencies and workarounds in pair with excellent asp net razor tutorial performance and .NET Standard 2.0 and .NET Core 3.0 support. The first issue is that the RazorEngine.NetCore does not support all the syntax as its predecessor, such as the @functions.

• That means we can’t merely transplant our MVC views into a console application and hope it all works.
• The Blazor WebAssembly App template is now named Blazor WebAssembly Standalone App since it no longer includes the ASP.NET Core hosted option.
• Applications must add an explicit reference to the Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation package if the app relies on runtime compilation to process .cshtml files.
• This project was primarily created using .NET Core 2 on a Windows 10 system with Visual Studio 2017 Community edition.
• In this Razor tutorial, we will take a quick tour of the Razor View Engine in ASP.NET Core MVC.
• The HTTP logging middleware now offers enhanced extensibility with several new features.

If I inspect the fully concatenated string of the injected code block with the templates content and then manually add that same code block directly into the template, it does compile and functions as intend. I manually added the code into the template for testing, but this would not work for production, and thus here we are. ASP.NET MVC websites do a terrific job of masking the developer away from most of the complexities, but behind the scenes, it’s useful to know that .cshtml files are ultimately converted into executable code.

Templating using new RazorEngine API

The ASPX View Engine is the legacy view engine built into ASP.NET MVC from its initial days. The Razor View Engine is more advanced and is now the default view engine of ASP.NET Core MVC. This article compares these two view engines in brief and then discusses how you can work with the Razor View Engine in ASP.NET Core MVC. The library caches all template compilations using the template key parameter.

Here is a solution that is encapsulated for usage outside of an mvc app. It does require package references to aspnet core and mvc, but those are easy to add to a service or console application. RenderToStringAsync is the method to call to render a view to a string. When RazorLight compiles your template – it loads all the assemblies from your entry assembly and creates MetadataReference from it. But sometimes compilation crashes with an exception message like “Can not find assembly My.Super.Assembly2000”.

Instead, we are setting up an object in memory that will contain everything the engine needs to know about the RazorProject assembly that we are creating. In this demo, the definition of razorTemplateBaseFolder has been hard-coded for simplicity. If you use this code in your real-life solutions, I would consider making this configurable https://remotemode.net/ – e.g. combining with appSettings configuration. However, things start to unravel as soon as you attempt to create console projects – which you will be if you intend to have processes, such as an Azure WebJob, running on a schedule. The null parameter is the modelType and null in this case means we use dynamic as the type of the model.