CODEWITHSUNDEEP
formsblazor
Wolf
Wolf

Reputation: 53

Blazor EditForm bind from List

I'm trying to make a page to edit customer data.

The customer object has a list of phonenumbers(string) , because most have a landline and cellphone. I can't seem to find a way to put this into an editform. I tried using a foreach loop, but it can't bind to this. I also tried to use a local copy in the loop and bind to that. That works, but i can't retrieve the changes after the submit button is pressed. What am i doing wrong ? What is the proper way to do this ? I can't seem to find any tutorial that covers this.

I have recreated my page to the minimal that does the same thing:

This is my Customer class

public class Customer
    {
        public string Name { get; set; }
        // arbitrary extra fields
        public List<string> phoneNumber { get; set; }
    }
}

 public class CustomerService
    {
        Customer jeff;

        public CustomerService()
        {
            jeff = new Customer
            {
                Name = "Jeff",
                phoneNumber = new List<string> { "123456", "654321" },
            };
        }

        public Customer getCustomer()
        {
   
            return jeff;
        }

        public void setCustomer(Customer cust)
        {
            jeff = cust;
        }
    }

And my page

<EditForm Model="@customer" OnSubmit="@submitChanges">

    <InputText id="name" @bind-Value="@customer.Name" /><br/>
    <!-- How do i link the multiple phonenumbers-->

    @foreach(string phone in customer.phoneNumber)
    {
        //this does not compile
        //<InputText @bind-Value="@phone"/>

        //this compiles but i can't find how to acces the data afterward ???
        string temp = phone;
        <InputText @bind-Value="@temp"/>

    }

    @for(int i=0;i<customer.phoneNumber.Count();i++)
    {
        //this compiles but chrashed at page load
        // <InputText @bind-Value="@customer.phoneNumer[i]"/>
    }


    <button type="submit">submit</button>
      
</EditForm>
Code Section
@code {        

    Customer customer;
   
    protected override void OnInitialized()
    {
        customer = _data.getCustomer();           
    }

    private void submitChanges()
    {
        _data.setCustomer(customer);
    }
}

Upvotes: 5

Views: 8193

Answers (2)

Deepak
Deepak

Reputation: 1

use     
word-break: break-all;
word-wrap: break-word;
white-space: initial;

Upvotes: 0

enet
enet

Reputation: 45764

@Wolf, today I've read about the ObjectGraphDataAnnotationsValidator which is used instead of the DataAnnotationsValidator component

To validate the bound model's entire object graph, including collection- and complex-type properties

Emphasis on including collection. Consequently, I searched for a sample implementing a collection in EditForm, but could not find. After exerting some efforts I succeeded to do that. Here's the code:

@page "/"
@using Microsoft.AspNetCore.Components.Forms
@using System.ComponentModel.DataAnnotations;

<EditForm Model="@customer" OnSubmit="@submitChanges">
    <DataAnnotationsValidator />
    <p>
        <InputText id="name" @bind-Value="customer.Name" /><br />
    </p>
    @foreach (var phone in customer.phones)
    {
        <p>
            <InputText @bind-Value="phone.PhoneNumber" /> 
        </p>

     }

     <p>
         <button type="submit">submit</button>
      </p>

    </EditForm>

 <div>
    <p>Edit  customer</p>

    <p>@customer.Name</p>
    @foreach (var phone in customer.phones)
    {
        <p>@phone.PhoneNumber</p>

    }

</div>
@code {

Customer customer;



protected override void OnInitialized()
{
    customer = new Customer();

}
private void submitChanges()
{
    // _data.setCustomer(customer);
}

public class Customer
{
    public string Name { get; set; } = "jeff";
    //[ValidateComplexType]
    public List<Phone> phones { get; } = new List<Phone>() { new Phone 
     {PhoneNumber = "123456" }, new Phone {PhoneNumber = "654321" }};
}

public class Phone
{
    public string PhoneNumber { get; set; }
}

}

Hope this helps...

Upvotes: 6

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