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Url.Action 生成查询而不是参数 URL

这是控制器类。我只显示方法签名。

[Authorize]
[RoutePrefix("specification")]
[Route("{action=index}")]
public class SpecificationController : BaseController
{
    [HttpGet]
    [Route("~/specifications/{subcategoryID?}")]
    public ActionResult Index(int? subcategoryID);

    [HttpPost]
    [Route("get/{subcategoryID?}")]
    public JsonResult Get(int? subcategoryID);

    [HttpGet]
    [Route("~/specifications/reorder/{subcategoryID}")]
    public ActionResult Reorder(int subcategoryID);

    [HttpGet]
    [Route("new/{id?}")]
    public ActionResult New(int? id);

    [HttpGet]
    [Route("edit/{id?}")]
    public ActionResult Edit(int id);

    [HttpPost]
    [ValidateAntiForgeryToken]
    [Route("edit")]
    public JsonResult Edit(SpecificationJson specification);

    [HttpPost]
    [Route("moveup")]
    public JsonResult MoveUp(int specificationID);

    [HttpPost]
    [Route("movedown")]
    public JsonResult MoveDown(int specificationID);

    [HttpDelete]
    [Route]
    public ActionResult Delete(int id);
}

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问题是调用

@Url.Action("index", "specifications", new RouteValueDictionary() { { "subcategoryID", @subcategory.SubcategoryID } })