Actually on my .NET Core project i'm using a simple modelbinder to trim input string
public class StringModelBinder : IModelBinder
{
public Task BindModelAsync(ModelBindingContext bindingContext)
{
if (bindingContext == null)
throw new ArgumentNullException(nameof(bindingContext));
ValueProviderResult valueProviderResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
if (valueProviderResult != ValueProviderResult.None)
{
bindingContext.ModelState.SetModelValue(bindingContext.ModelName, valueProviderResult);
string valueAsString = string.IsNullOrWhiteSpace(valueAsString) ? null : valueAsString.Trim();
bindingContext.Result = ModelBindingResult.Success(valueAsString);
}
return Task.CompletedTask;
}
}
I use it through the IModelBinderProvider and it works perfectly on input of type string. However I notice that it's not fired when on input I have a collection of string like this
public IActionResult CollectionTrimTest([FromBody] List<string> values)
To perform it I think I should use something like
if (context.Metadata.IsCollectionType)
return new BinderTypeModelBinder(typeof(CollectionModelBinder));
but I really don't know how to implement CollectionModelBinder to trim result based on string collection. Centralizing the trim logic between StringModelBinder and CollectionModelBinder would be greatly appreciated of course.
