In general, the flow will look like:. Figure 2 Simple Flow Adding in Razor. This workflow repeats as needed when a new template is requested. While I will show examples generating views suitable for binding in Angular and Knockout, keep in mind that these are hardly the only options. From a setup perspective, you need at least three projects. The initial project will be structured as shown in Figure 3. Figure 3 Initial Project Structure. For this article, it simplifies matters to have two MVC projects, one for each of the frameworks to be demonstrated.
Regardless, only the logic embedded in the UI project will have to be repeated as you support multiple front ends. Adding appropriate error handling will be left as an exercise for you, the intrepid reader. DataAnnotations namespace, as shown in Figure 4. Once applied, it behaves just like the standard Validators.
Anytime the model is validated, all validators will run, including any custom validators. Views created with Razor can easily incorporate these validations client-side, and these validators are automatically evaluated on the server by the Model Binder.
Validating user input is key to having a more secure system. This will create methods for the standard verb-based actions Get, Post, Put, Delete. Next, I turn my attention to the View that the built-in scaffolding produces from the View Model. In the TimeTracking. In this Controller, I create the Edit action by adding this code:. In addition to specifying the model, I make sure to specify creation of a partial view.
I want the generated view to include only the markup defined in the generated view. This HTML fragment will be injected into the existing page on the client. A sampling of the markup generated by the scaffolding is shown in Figure 6. There are a few key things to note with this generated view, which out of the box generates a responsive, bootstrap-based UI. These include:. The metadata is evaluated at run time. This means that you can add attributes to your model after generating the view and these attributes will be used to determine the validators, labels and editors, as appropriate.
To make the generated markup work with Knockout, I need to add a couple of attributes to the generated markup. The binding declaration specifies the type of binding and then the property to be used. Looking back at the generated markup, you see how the class attribute is added. Following the same process, I can modify the EditorFor function, as shown in the code here:. Using the markup generated out of the box from the scaffolding, this is the only change needed to add Knockout binding.
Data binding with Angular is similar. I can add either an ng-model attribute or a data-ng-model attribute. Notice that in the portion of the page that displays an error message, there's an additional test: if debuggingFlag. This is a variable that you can set to true if you're having trouble sending email. When debuggingFlag is true, and if there's a problem sending email, an additional error message is displayed that shows whatever ASP.
NET has reported when it tried to send the email message. Fair warning, though: the error messages that ASP. NET reports when it can't send an email message can be generic. For example, if ASP. Important When you get an error message from an exception object ex in the code , do not routinely pass that message through to users. Exception objects often include information that users should not see and that can even be a security vulnerability. That's why this code includes the variable debuggingFlag that's used as a switch to display the error message, and why the variable by default is set to false.
You should set that variable to true and therefore display the error message only if you're having a problem with sending email and you need to debug. Once you have fixed any problems, set debuggingFlag back to false. Set your-email-address-here to your own email address. This is the email address that the message is sent from. Some email providers don't let you specify a different From address and will use your user name as the From address.
It can be a challenge sometimes to make sure you have the right settings for the SMTP server, port number, and so on. Here are a few tips:. Run the EmailRequest. Make sure the page is selected in the Files workspace before you run it. Enter your name and a problem description, and then click the Submit button.
You're redirected to the ProcessRequest. You can also send files that are attached to email messages. In this procedure, you create a text file and two HTML pages. You'll use the text file as an email attachment. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Click the Submit button.
Mvc outside of a web app. The dark horse in this race is the Razor SDK , which didn't get a mention in the proposed solutions. The Razor SDK is relatively new - it's included in. NET Core 2.
From the documentation the SDK includes a set of predefined targets, properties, and items that allow customizing the compilation of Razor files. The bit that caught my eye though was the minimum set of dependencies:. At last, something with the cut-down dependencies I was looking for. Unlike the other solutions, this approach compiles Razor templates at build time.
For a small hit on every build, there is a performance gain for the app, given there is no need to generate an in-memory assembly on every request using Roslyn. We also don't have to set up a full MVC controller and DI container for each request - in fact there is no need to take a dependency on Microsoft. Mvc at all. The project consists of the standalone razor views project RazorMailer.
With the views precompiled we've now solved the key problem other solutions tackled with Roslyn or MVC.
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