Asp.net Vnext IValueProvider

private class CustomValueProvider : IValueProvider
{

//判断否具有指定的前缀
public Task<bool> ContainsPrefixAsync(string prefix)
{
var result = string.Equals(prefix, "test", StringComparison.OrdinalIgnoreCase);
return Task.FromResult(result);
}

//返回ValueProviderResult
public Task<ValueProviderResult> GetValueAsync(string key)
{

//进行绑定的值
var value = "custom-value-provider-value";
var result = new ValueProviderResult(value, value, CultureInfo.CurrentCulture);
return Task.FromResult(result);
}
}

public IValueProvider GetValueProvider(ValueProviderFactoryContext context)
{
if (context.HttpContext.Request.Path.Value.Contains("TestValueProvider"))
{
return new CustomValueProvider();
}

return null;
}

public class HomeController
{
public string TestValueProvider(string test)
{
return test;
}

}

public class Startup
{
// For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940 public void ConfigureServices(IServiceCollection services)
{

services.AddSingleton<IMemoryCache, MemoryCache>();

services.AddCaching();
services.AddSession();

services.AddMvc()
.Configure<MvcOptions>(options =>

{//添加CustomValueProviderFactory
options.ValueProviderFactories.Insert(1, new CustomValueProviderFactory());
});
}