MVC QueryString转换为动态对象 [英] MVC QueryString into Dynamic Object

问题描述

是否可以使用查询字符串参数填充动态对象?

Is there a way to populate a Dynamic object with Query String parameters?

这样一来，我的QS中的搜索参数就可以改变，而不必直接将它们绑定到容器对象上，也不必更改搜索方法的签名.

This is so that my search parameters in the QS can vary without binding them directly to a container object or having to change the signature of the search method.

例如

入站URL:www.test.com/Home/Search?name=john&product=car&type=open&type=all

Inbound URL: www.test.com/Home/Search?name=john&product=car&type=open&type=all

public ActionResult Search()
{
    dynamic searchParams = // **something magic here**

    var model = getResults(searchParams);
    return View(model);
}

填充的searchParams对象应如下所示:

The populated searchParams object should look like:

{
    name = "john",
    product = "car",
    type = { "open", "all" }
}

有什么想法吗?

推荐答案

一个解决方案可以是建立 NameValueCollection .

One solution can be that you build up an ExpandoObject from the Request.QueryString which is a NameValueCollection.

编写转换很容易，您可以将其放在扩展方法中:

It's easy to write the transformation and you can put it inside an extension method:

public static class NameValueCollectionExtensions:
{
    public static dynamic ToExpando(this NameValueCollection valueCollection)
    {
        var result = new ExpandoObject() as IDictionary<string, object>;
        foreach (var key in valueCollection.AllKeys)
        {
            result.Add(key, valueCollection[key]);
        }
        return result;
    }
}

在您的控制器中，您可以像这样使用

And in your controller you can use like:

public ActionResult Search()
{
    dynamic searchParams = Request.QueryString.ToExpando();

    DoSomething(searchParams.name);  
    var model = getResults(searchParams);
    return View(model);
}

注意:您将需要执行一些其他转换以处理type属性，默认情况下该属性不会自动成为数组.

Note: You will need to do some additional transformation to handle to type property which won't be automatically an array by default.

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