/// <summary>
/// Create a <see cref="VxFormElementLoader{TValue}"/> that will create a <see cref="FormElement"/>
/// based on the dynamic <see cref="ExpandoObject"/>. This allows for dynamic usage of the form-generator.
/// </summary>
/// <typeparam name="TValue"></typeparam>
/// <param name="model"></param>
/// <param name="key"></param>
/// <param name="builder"></param>
private void CreateFormElementReferenceExpando <TValue>(ExpandoObject model, string key, RenderTreeBuilder builder)
{
// cast the model to a dictionary so it's accessable
var accessor = ((IDictionary <string, object>)model);
object value = default(TValue);
accessor.TryGetValue(key, out value);
var valueChanged = Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck(
EventCallback.Factory.Create <TValue>(
this, EventCallback.Factory.
CreateInferred(this, __value => accessor[key] = __value,
(TValue)accessor[key])));
var formElementReference = new FormElementReference <TValue>()
{
Value = (TValue)value,
ValueChanged = valueChanged,
Key = key
};
var elementType = typeof(VxFormElementLoader <TValue>);
builder.OpenComponent(0, elementType);
builder.AddAttribute(1, nameof(VxFormElementLoader <TValue> .ValueReference), formElementReference);
builder.CloseComponent();
}
private void CreateFormElementReferencePoco <TValue>(object model, PropertyInfo propertyInfo, RenderTreeBuilder builder)
{
var valueChanged = Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck(
EventCallback.Factory.Create <TValue>(
this, EventCallback.Factory.
CreateInferred(this, __value => propertyInfo.SetValue(model, __value),
(TValue)propertyInfo.GetValue(model))));
// Create an expression to set the ValueExpression-attribute.
var constant = Expression.Constant(model, model.GetType());
var exp = Expression.Property(constant, propertyInfo.Name);
var lamb = Expression.Lambda <Func <TValue> >(exp);
var formElementReference = new FormElementReference <TValue>()
{
Value = (TValue)propertyInfo.GetValue(model),
ValueChanged = valueChanged,
ValueExpression = lamb,
Key = propertyInfo.Name
};
var elementType = typeof(VxFormElementLoader <TValue>);
builder.OpenComponent(0, elementType);
builder.AddAttribute(1, nameof(VxFormElementLoader <TValue> .ValueReference), formElementReference);
builder.CloseComponent();
}
