是否有一个等同于"HttpContext.Response.Write"的消息?在Asp.Net Core 2中? [英] Is there an equivalent to "HttpContext.Response.Write" in Asp.Net Core 2?

问题描述

我正在尝试使用Asp.Net Core 2中的ActionFilter在页面上附加一些HTML和Javascript内容.

I'm trying to append some HTML and Javascript content on page using ActionFilter in Asp.Net Core 2.

在MVC中，它正在与

 filterContext.HttpContext.Response.Write(stringBuilder.ToString());

但是在Core中它不起作用.

but in Core it not working.

我试图用这个来实现:

filterContext.HttpContext.Response.WriteAsync(stringBuilder.ToString());

但是它会使整个页面空白.

But it make complete page to blank.

我正在寻找内置于Asp.Core 2.0中的nopCommerce 4.0的解决方案

I'm looking solution for nopCommerce 4.0 which build in Asp.Core 2.0

推荐答案

您可以尝试这样的事情

在 INopStartup.Configure(IApplicationBuilder应用程序)

application.Use(async (context, next) =>    
{
    using (var customStream = new MemoryStream())
    {
        // Create a backup of the original response stream
        var backup = context.Response.Body;

        // Assign readable/writeable stream
        context.Response.Body = customStream;

        await next();

        // Restore the response stream
        context.Response.Body = backup;

        // Move to start and read response content
        customStream.Seek(0, SeekOrigin.Begin);
        var content = new StreamReader(customStream).ReadToEnd();

        // Write custom content to response
        await context.Response.WriteAsync(content);
    }
});

并且比您的自定义 ResultFilterAttribute

public class MyAttribute : ResultFilterAttribute
{
    public override void OnResultExecuted(ResultExecutedContext context)
    {
        try
        {
            var bytes = Encoding.UTF8.GetBytes("Foo Bar");

            // Seek to end
            context.HttpContext.Response.Body.Seek(context.HttpContext.Response.Body.Length, SeekOrigin.Begin);
            context.HttpContext.Response.Body.Write(bytes, 0, bytes.Length);
        }
        catch
        {
            // ignored
        }

        base.OnResultExecuted(context);
    }
}

结果

希望这有助于进入正确的方式.

Hope this helps to get into the right way.

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