Ajax刷新的ViewComponent替代方案

问题描述

我有一个viewcomponent，其中包含一些可重用的业务逻辑，这些逻辑嵌入到各个页面中。这一直很好。但是，我现在需要使用ajax刷新viewcomponent。

I have a viewcomponent that contains some reusable business logic that embed in various pages. This has been working fine. However, I now have a requirement to refresh the viewcomponent using ajax.

有什么方法可以做到这一点？从我所读的内容来看，这是不可能的，尽管该信息有些过时了。
如果不可能，最好的选择是什么？

Is there any way to accomplish this? From what I have read, it is not possible, although that info was a bit outdated.If it is not possible, what is the best alternative?

推荐答案

在beta7上，现在可以返回ViewComponent直接来自控制器。检查

On beta7 it is now possible to return a ViewComponent directly from a controller. Check the MVC/Razor section of the announcement

因此您可以拥有一个简单的视图像这样的组件：

So you could have a simple view component like this:

[ViewComponent(Name = "MyViewComponent")]
public class MyViewComponent : ViewComponent
{
    public IViewComponentResult Invoke()
    {
        var time = DateTime.Now.ToString("h:mm:ss");
        return Content($"The current time is {time}");
    }
}

在如下控制器中创建方法：

Create a method in a controller like:

public IActionResult MyViewComponent()
{
    return ViewComponent("MyViewComponent");
}

做得比我快速又肮脏的Ajax更新要好：

And do a better job than my quick and dirty ajax refresh:

var container = $("#myComponentContainer");
var refreshComponent = function () {
    $.get("/Home/MyViewComponent", function (data) { container.html(data); });
};

$(function () { window.setInterval(refreshComponent, 1000); });

当然，在beta7之前，您可以创建视图作为@eedam建议的解决方法，也可以使用

Of course, prior to beta7 you could create a view as the workaround suggested by @eedam or use the approach described in these answers

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