I want to populate select list directly from view(cshtml file) using dependency injection but getting following error......

Question

Answer 1

Hi @Atif Shah ,

When set the asp-items attribute, we need to use @( {the c# code} ).

You can refer the following code to populate the select tag using the service.

View page:

@model MVCWebApplication.Models.MyViewModel  
@using MVCWebApplication.Services   
@inject IServiceRepository _servicerepo  
<div class="row">  
    <div class="col-md-4">  
        <form asp-action="SelectIndex">  
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>  
            <div class="form-group">     
            <label>Lucky Employee</label>  
            <select asp-for="EmployeeId" asp-items="@(await _servicerepo.populateSelectList("proc1", "valuea"))" >  
                <option>Please select one</option>  
            </select>   
            </div>  
            <div class="form-group">  
                <input type="submit" value="Create" class="btn btn-primary" />  
            </div>  
        </form>  
    </div>  
</div>  

ServiceRepository.cs file:

public interface IServiceRepository  
{  
    Task<List<SelectListItem>> populateSelectList(string procedure, string firstval);  
}  

public class ServiceRepository : IServiceRepository  
{  
    public Task<List<SelectListItem>> populateSelectList(string procedure, string firstval)  
    {  
        return Task.Factory.StartNew(() =>  
        {  
            return new List<SelectListItem>()  
                    {  
                        new SelectListItem() { Value = "aa", Text = "AA_" + procedure },  
                        new SelectListItem() { Value = "bb", Text = "BB_" + procedure },  
                        new SelectListItem() { Value = "cc", Text = "CC_" + procedure }  
                    };  
        });   
    }  
}  

And the model:

public class MyViewModel  
{  
    public string EmployeeId { get; set; }  
    public string Comments { get; set; }   
}  

The output like this:

---

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Best Regards,
Dillion