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One-to-many relationship in the create action method

Tom Cruser 1741 05-Dec-2014

I'm currently working on a project that requires add multiple addresses for one client. I have three models: here is a link to my class diagram: http://sdrv.ms/1fWioA2 

Person model: 

public class Person
{    
    public Person()
    {
        this.Adresses = new HashSet<Address>();
    }
 
    public int PersonID { get; set; }
 
    [Required(ErrorMessage = "Name is required")]
    public string Name { get; set; }
 
    [Required(ErrorMessage = "Email Address is required")]
    [DisplayName("Email Address")]
    //[RegularExpression(@"[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}",
    //ErrorMessage = "Email is is not valid.")]
    [DataType(DataType.EmailAddress)]
    public string Email { get; set; }
 
    public string Mobile { get; set; }
    public string Phone { get; set; }
    public string Fax { get; set; }
 
    public virtual ICollection<Address> Adresses { get; set; }
}

address: 

public class Address
{
    [HiddenInput(DisplayValue = false)]
    public int ID { get; set; }
    public string Street { get; set; }
    public string Building  { get; set; }
 
    public int PersonID { get; set; }
    public int CityID { get; set; }
 
    public virtual City City { get; set; }
    public virtual Person Person { get; set; }
}
I created modelview to bind to my Create view:
 
public class PersonViewModel
{
    public Person Person { get; set; }
    public ICollection<Address> Adresses { get; set; }
}

My question is how to bind the viewmodel to the create view in order to be able to save multiple addresses for the same Person?

asp.net sql server  relationship  relational database 
Updated on 06-Dec-2014
Tom Cruser

Tom Cruser

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2 Answers

Anonymous User

Anonymous User

06-Dec-2014

I recommend you to use client side approach using knockout as example: Server side: 

 public class HomeController : Controller{
    //
    // GET: /Home/
 
    public ActionResult Index()
    {
        var model = new
        {
            person = new { firstName = "123", secondName = "" },
            addresses = new dynamic[1] { new { street = "", building = "", selectedCityId = "" } },
            cities = new dynamic[2] { new { cityName = "Kiev", cityId = "1" }, new { cityName = "Moskow", cityId = "2" } }
 
        };
        return View(model);
    }
 
    public ActionResult Save(YourType model)
    {
        ..... 
    }
 
}

And client side: 

@{
Layout = null;
}
@using Newtonsoft.Json;
 
<!DOCTYPE html>
 
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div style="margin-left:100px">
    <p>First name:</p>
    <input data-bind="value:person.firstName" /> 
    <p>Second name:</p>
    <input data-bind="value:person.secondName" />
    <h3>Addresses</h3>
    <div data-bind="foreach:addresses">
        <p>
            Street
        </p>
        <input data-bind="value:street" />
        <p>
            Building
        </p>
        <input data-bind="value:building" />
        <p>
            City
        </p>
        <select data-bind="options: $parent.cities, optionsText: 
           'cityName',optionsValue:'cityId',
              value: selectedCityId , optionsCaption: 'Choose...'"></select>
        <div>
            <div style="float:left;">
                <button data-bind="click:$parent.add">
                    Add
                </button>
            </div>
            <div style="float:left;">
                <button data-bind="click: $parent.remove">
                    Delete
                </button>
            </div>
        </div>
        <div style="clear:both"></div>
    </div>
    <button style="width:100px"data-bind="click:save">
        Save
    </button>
 
 </div>
 <script src="~/Scripts/jquery-1.8.2.js"></script>
 <script src="~/Scripts/knockout-3.0.0.js"></script>
 <script src="~/Scripts/knockout.mapping-latest.js"></script>
 <script type="text/javascript">
    //This create javascript object from your model
    var personModel=@Html.Raw(JsonConvert.SerializeObject(Model))
    //Parse javascript object to knockout viewModel
    var viewModel=ko.mapping.fromJS(personModel);
    // Create new address
    function Address(){
        this.selectedCityId=ko.observable("");
        this.street=ko.observable("");
        this.building=ko.observable("");
    }
    //Add new address
    viewModel.add=function(){
        viewModel.addresses.push(new Address()); 
    };
    //Remove address
    viewModel.remove =function(item){
        if(viewModel.addresses().length>1){
            viewModel.addresses.remove(item)
        }         
    };
    //save model
    viewModel.save=function(){
        unmapped=ko.mapping.toJSON(viewModel);
        $.post('/home/save',unmapped)
    };
    ko.applyBindings(viewModel);
</script>
</body>
</html>

Anonymous User

Anonymous User

06-Dec-2014

For this purpose, create an editor template in /Shared/Editor called Address.cshtml: 

@model Address 
<div class="address">
@Html.HiddenFor(model => model.ID)
@Html.HiddenFor(model => model.PersonID)
@Html.HiddenFor(model => model.CityID)
@Html.TextBoxFor(model => model.Street) <br />
@Html.TextBoxFor(model => model.Building  ) <br />
</div>

Now, in your View, all you need to do is this: 

@Html.EditorFor(v => v.Addresses)

This will create form fields like this: 

<input type="hidden"name="address[0].Id" />
<input type="hidden"name="address[0].PersonId" />
<input type="hidden"name="address[0].CityId" />
<input type="text"name="address[0].Street" />
<input type="text"name="address[0].Building" />
<input type="hidden"name="address[1].Id" />
<input type="hidden"name="address[1].PersonId" />
<input type="hidden"name="address[1].CityId" />
<input type="text"name="address[1].Street" />
<input type="text"name="address[1].Building" />

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