Model Binding an Array from a Form Post | Asp.Net MVC & Asp.Net Core

if you form post html form fields:

<li>
  <label for="name">Your name<span>*</span></label>
  <input type="text" id="name" name="Name" />
</li>
<li>
  <label for="phoneNumber">Telephone<span>*</span></label>
  <input type="tel" id="phoneNumber" name="PhoneNumber" />
</li>

to a Controller using the [FromForm] attribute, AspNet will modelbind the form fields to your parameters by matching the name= attribute of the input elements to Property names on the parameter class:

class MyController : Controller
{
    public IActionResult Index([FromForm]Contact contact){ ... }
}

// ----
public class Contact
{
    public string Name {get;set;}
    public string PhoneNumber {get;set;}
}

But what about model binding an array — for instance, if you have a list of question inputs, and want to store the answers in a list?

If you name each field as if it were an array element:

 <fieldset id="q1">
     <label class="question">Question 1</label>
     <ul class="form-style">
        <li>
            <input type="radio" id="c1" name="answers[0]" value="@c1"/>
            <label for="c1">@c1</label>
        </li>
        <li>
            <input type="radio" id="c2" name="answers[0]" value="@c2"/>
            <label for="c2">@c2</label>
        </li>
    </ul>
  </fieldset>
    <fieldset id="q2">
        <label class="question">Question 1?</label>
        <ul class="form-style">
            <li>
                <input type="radio" id="b1" name="answers[1]" value="@b1"/>
                <label for="b1">@b1</label>
            </li>
            <li>
                <input type="radio" id="b2" name="answers[1]" value="@b2"/>
                <label for="b2">@b2</label>
            </li>
            <li>
                <input type="radio" id="b3" name="answers[1]" value="@b3"/>
                <label for="b3">@b3</label>
            </li>
            <li>
                <input type="radio" id="b4" name="answers[1]" value="@b4"/>
                <label for="b4">@b4</label>
            </li>
        </ul>
    </fieldset>

then AspNet will bind the submitted fields named answers[0], answers[1], ... to an array Property in your class with the matching name:

public class Questions
{
    public string[] Answers {get;set;}
}

3 thoughts on “Model Binding an Array from a Form Post | Asp.Net MVC & Asp.Net Core”

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    A lot of cogent tradition of the test was developed by psychologist and his collaborator, Theodore Simon, in France. In 1904 the minister of public instruction in Paris named a commission to check or produce tests that will make sure that intellectually disabled youngsters received associate adequate education. The minister was conjointly involved that youngsters of traditional intelligence were being placed in categories for intellectually disabled youngsters attributable to behavior issues. Even before Wissler’s analysis, Binet, World Health Organization was charged with developing the new take a look at, had unconditionally rejected the Galtonian tradition, basic cognitive process that Galton’s tests measured trivial skills. He projected instead that tests of intelligence ought to live skills like judgment, comprehension, and reasoning—the same sorts of skills measured by most intelligence tests these days. Binet’s early take a look at was taken to Stanford University by Lewis Terman, whose version came to be referred to as the Stanford-Binet test. This takes a look at has been revised often and continues to be utilized
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    Later developments in intelligence testing distended the vary of skills tested. as an example, in 1997 the psychologists J.P. Das and Jack A. Naglieri printed the psychological feature Assessment System, a take a look at supported a theory of intelligence 1st projected by the Russian scientist Alexander Luria. They take a look at measured coming up with skills, basic cognitive process skills, and synchronous and sequent process skills. synchronous process skills area unit wont to solve tasks like figurative matrix issues, within which the take a look at taker should fill during a matrix with a missing geometric type. sequent process skills area unit utilized in tests like digit span, within which one should repeat back a string of memorized digits.
    IQ was originally computed because the magnitude relation of age to written account (physical) age, increased by one hundred. Thus, if a baby mature ten had an age of twelve (that is, performed on the take a look at at the amount of a median 12-year-old), the kid was allotted associate IQ of 12/10 × one hundred, or 120. If the 10-year-old had an age of eight,
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