Asp.net Vnext IValueProvider

时间:2022-04-03 16:46:00

概述


本文已经同步到《Asp.net Vnext 系列教程 》中]

IValueProvider

根据ValueProvider获取数据,在对数据进行绑定

代码实现


  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);
}
}

ValueProvider工厂

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

控制器

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

启动类

   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(, new CustomValueProviderFactory());
});
}

Asp.net Vnext  IValueProvider