Mvc form not validating
Temp Data is a great place for this and since I'm not the first person to be having this moment of clarity, there is already code available for doing it (in Mvc Contrib and by Kazi Manzur Rashid).By using these attributes we no longer need to worry about rebuilding the view model in our POST action. Here's an example using the attribute: attribute on the GET action.You’ll build a simple Spring MVC application that take user input and checks the input using standard validation annotations.You’ll also see how to display the error message on the screen so the user can re-enter a valid input. You can use any build system you like when building apps with Spring, but the code you need to work with Gradle and Maven is included here. Post Mapping; import org.servlet.config.annotation. View Controller Registry; import org.servlet.config.annotation. Web Mvc Configurer Adapter; @Controller public class Web Controller extends Web Mvc Configurer Adapter and are resolved as views by stripping the '.html' suffix off the file name.I made various attempts to rebuild the view model inside possible but requires a fair bit of reflection, and to be honest, is totally unecessary.The solution (about time, you say) is to accept that a GET is different to a POST and embrace PRG (Post, Redirect, Get). A command is often more simple in its structure than a View.One possible reason for this is that Model State is not persisted between requests.It can be, but you need to copy it somewhere more permanent.
This is for both Ajax helpers and Client Validation. I wll just copy and paste text from scottgu blog: Unobtrusive Java Script and HTML 5: The AJAX and Validation helpers in ASP.
This makes your HTML smaller and cleaner, and makes it easier to optionally swap out or customize JS libraries. NET MVC 3 also now use the j Query Validate plugin by default.
Basically we get all the validation done by loading js function parsing loaded DOM searching for specific parameters based on which validation rules are applied to elements.
Embracing PRG, when a client POSTs to the server, we should issue a Redirect which in turn makes a GET request.
You're probably already doing this when your POST is successful, but we've been encourage NOT to do it when Model State validation fails.
Validation is not turned for those elements although all attributes are correctly marked.