Very newbie question, but I'm finding it difficult to understand how checkbox States are maintained after a form post in razor mvc 5.
I've done it in PHP with session variables but for the life of me, can't find an easy to understand way in razor.
My situation is, view with checkboxes, form post handled by controller and postback to view with checkbox States from before form post set.
Thanks!
In Your controller you can check bool property of your checkbox by
if (model.check)
{
do something
}
Related
I have an html page that takes form input. Based on the form variables input into the form, I want to navigate to different URLs using AngularJS routing. Can anyone provide some information as to how I can do this?
There can be multiple approaches to this. Two obvious choices are to use $routeProvider if you are using ngRoute for routing or $stateProvider if you use angular-ui-router. In both cases, the paradigm remains the same.
Essentially you can map your form date from $scope to the states/routes in your app.config. From there, you can pass the templateURLs and map them to whatever HTML page you want it to load.
Please reach out for further clarification . All the best.
I am a little confused about how Viewstate actually help the server controlls to store their data and retrieve it in the next postBack, I think a small example with or contoller should be ok.
by the way, html elements can't use the Viewstate?
Read documentation, e.g. Taking a Bite Out of ASP.NET ViewState
Can I disable spring MVC to generate hidden field for checkbox. I'm using Thymeleaf templates.
Thanks!
This is a fairly old question, but I just ran into this posting a Spring form that contained checkboxes with a GET action. My work-around also uses jQuery, which was not tagged in this question, but it did achieve the desired result.
The _checkbox hidden field was showing in the URL as a query string parameter. I ended up using jQuery to remove the Spring-generated hidden fields at page load, which cleaned up the URL on submit. I did not see any adverse behavior on the server side.
I'm developing a project using Spring 3.0.
I have a form with several submit buttons.
What I would like to do is to have different validation requirements depending on the pressed button.
How do I do this? An example would be great.
Thanks
You can have multiple implementation of Spring Validator. And depending on the button clicked you can call validate method of required validator implementation from controller.
Here is a example of validation using spring validator.
Lately I have been watching Pluralsight intro videos on MVC 3. I have never worked with the Model View Control approach before, but I'm starting to understand how these 3 crucial parts of an app are separated.
I created a front-end prototype of a survey I would like to implement into a View of my MVC web app. The survey is in HTML, CSS, using jQuery to deliver content changes depending on the type of evaluation (6-11 questions), and jQuery UI for a couple slider ratings.
I noticed through tutorials that you can use an HTML form and helpers that allow the user to edit content, but my prototype already allows the users to rate via radio buttons, comment text boxes, and sliders. Would I need to change any of my existing code if I just want to store this employee data to the Model, and depending on what survey's the employee has completed through the Controller, disable drop down fields?
Also, would I store the current employee data on submit of survey through an HttpPost in the Controller to the Model?
My apologies if my questions seem rather vague. Could someone point me in the right direction to a resource or documentation similar to my needs above? The Pluralsight videos are taking me in the wrong direction.
The form helpers you mentioned are optional. You could use a static HTML page in an MVC app with no issues, but it'll mean some extra work.
All the helpers are doing is rendering HTML for you to save you the trouble of handcoding it.
Your form should have a action attribute, and you can point that at an MVC controller URL. The data will arrive in your controller in the request, and you can pull the values out by hand. There are a number of ways to do this, including pulling the values out by key:
public ActionResult HelloWorld()
{
ViewData["Message"] = "Hello World!";
return View();
}
That would retrieve the value of a form input with a name="Message" attribute.
The best way to collect these values, though, is to allow ASP.NET MVC to map them to a .NET object for you. Read up on model binding to see how that works.
If you like books, I highly recommend Wrox Professional ASP.NET MVC3. It's very approachable and will cut your learning curve drastically. Good stuff.