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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
#nullable enable
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc.Core;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
namespace Microsoft.AspNetCore.Mvc.ModelBinding.Binders;
/// <summary>
/// An <see cref="IModelBinderProvider"/> for <see cref="IFormCollection"/>.
/// </summary>
public class FormCollectionModelBinderProvider : IModelBinderProvider
{
/// <inheritdoc />
public IModelBinder? GetBinder(ModelBinderProviderContext context)
{
ArgumentNullException.ThrowIfNull(context);
var modelType = context.Metadata.ModelType;
if (typeof(FormCollection).IsAssignableFrom(modelType))
{
throw new InvalidOperationException(
Resources.FormatFormCollectionModelBinder_CannotBindToFormCollection(
typeof(FormCollectionModelBinder).FullName,
modelType.FullName,
typeof(IFormCollection).FullName));
}
if (modelType == typeof(IFormCollection))
{
var loggerFactory = context.Services.GetRequiredService<ILoggerFactory>();
return new FormCollectionModelBinder(loggerFactory);
}
return null;
}
}
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