[Blazor] Dynamic Editor Generation For Model

[smartprogrammer93]

Is your feature request related to a problem? Please describe.

It would save me so much time if i can generate forms based on the model like how it used to be in Normal Asp.net core views.

If we can have something like this :
@Html.Editor("StudentId")
and its overloads
Or something like this :

var propertyName = "FirstName"
<InputText @bind-Value-propertyName="propertyName " @bind-Value-object="Model" />

[smartprogrammer93]

So I noticed that there is a property called ValueExpression inside of ComponentBase

Can That be used instead of Bind-Value?

[smartprogrammer93]

Alright update 3,
I realized i can implement this functionality myself
Sharing it if anyone is interested

@using System.Linq.Expressions;
@typeparam TModel
<InputText class="form-control"
           ValueChanged="Microsoft.AspNetCore
                            .Components.EventCallback
                            .Factory.Create<string>
                            (this, UpdateValue)"
           Value="@PropertyValue" ValueExpression="exp" />
@code{

    [Parameter]
    public TModel Model { get; set; }

    [Parameter]
    public string PropertyName { get; set; }

    public Type ModelType => Model.GetType();

    public System.Reflection.PropertyInfo Property =>
        ModelType.GetProperty(PropertyName);

    public Expression<Func<string>> exp
    {
        get
        {
            var memberExpression = Expression.Constant(Model);
            var propertyExpression = Expression.Property(memberExpression, PropertyName);
            var expression = Expression.Lambda<Func<string>>(propertyExpression);
            return expression;
        }
    }

    public string PropertyValue
    {
        get
        {
            return (string)Property.GetValue(Model);
        }
    }

    public void UpdateValue(String value)
    {
        Property.SetValue(Model, value);
    }

}

I don't understand the importance of ValueExpression Though. What functionality does ValueExpression provide?

[mkArtakMSFT]

Thanks for your feature request. This is not something we plan to add support for in the near future.

[SteveSandersonMS]

What functionality does ValueExpression provide?

It's the mechanism by which the receiver can obtain metadata about the value you're supplying. For example, the Input components all use it to attach themselves into the validation system, showing the validation status of the associated field.