插入一個下拉列表值進路由值

Question

我有以下的控制器：

public class StoreController : Controller 
{ 
    public ActionResult Index(string category, int? page) 
    { 
     //some code 
    } 
} 

和一個圖，該數據發佈到Index方法：

@using (Html.BeginForm("Index", "Store", new { category = Model.Category, page = 1})) 
{ 
    <input type = "submit" class="btn btn-default" value = "Search" /> 
    @:Choose category: &emsp; 
    @Html.DropDownListFor(model => model.Category, new[] 
    { 
     new SelectListItem{ Text = "All", Value = "All", Selected = true}, 
     new SelectListItem{ Text = "Cat1", Value = "Cat1"}, 
     new SelectListItem{ Text = "Cat2", Value = "Cat2"}, 
     new SelectListItem{ Text = "Cat3", Value = "Cat3"} 
    }) 
} 

問題是，路由值傳遞給Index方法顯然是錯誤的，因爲Model.Category是傳遞給視圖的Model的Category。我正嘗試使用下拉列表中的選定值進行路由。問題是我如何檢索它？

我知道我可以用jQuery Ajax做這一切，但我想先試試這種方式。是否有可能以簡單的方式做到這一點，或者我真的不得不修改GET請求嗎？

Answer 1

你的模型應該像

public class MyModel 
{ 
    public string Category {get; set;} 
    public int? page {get; set;} 
} 

使用此

public class StoreController : Controller 
{ 
    [HttpPost] 
    public ActionResult Index(MyModel model) 
    { 
     // process ur submit page with proper category 
    } 

    [HttpGet] 
    public ActionResult Index() 
    { 
     var model = new MyModel(); 
     model.Category = "All"; // the default category 
     return View(); 
    } 
} 

呈現下拉列表這樣

@Html.DropDownListFor(model => model.Category, new[] 
{ 
    new SelectListItem{ Text = "All", Value = "All" }, // YOU DO NOT NEED TO KEEP THIS SELECTED, MVC DOES AUTO SELECT BASED ON PROPERTY VALUE 
    new SelectListItem{ Text = "Cat1", Value = "Cat1"}, 
    new SelectListItem{ Text = "Cat2", Value = "Cat2"}, 
    new SelectListItem{ Text = "Cat3", Value = "Cat3"} 
})