MVC - 传递价值，通过JS控制器 [英] MVC - Pass value to controller via JS

问题描述

我有一个下拉

 <%=Html.DropDownList("genre", Model.genres, "", new { @onchange = ChangeMovie()" })%>

JavaScript的样子（不完整）

The JavaScript looks like (incomplete)

function ChangeMovie() {
    var genreSelection = container.find( '#genre' ).val();

    $.ajax({  
        "url" : "/Movies/GetGenre" ,
        "type" : "get" ,
        "dataType" : "json" ,
        "data" : { "selectedValue" : $( "#genre").val() },
        "success" : function (data) {}
    });
};

Conrtroller code

Conrtroller code

public ActionResult GetGenre(string genreName)
{
   //Need to get the `genreName` from the JavaScript function above.. which is
   // in turn coming from the selected value of the drop down in the beginning.

}

我想通过下降的选定值下降到通过js函数控制器code中的作用的结果。我需要帮助，所以正确的值传递到控制器操纵的JavaScript code和AJAX调用code。

I want to pass the selected value of the drop down to the action result in the controller code via the js function. I need help manipulating the JavaScript code and the AJAX call code so the correct value is passed onto the controller.

推荐答案

您有很多不必要的报价也不会在你的行动返回的JSON

You have a lot of unnecessary quotes as well not returning JSON in your action

$.ajax({
    url: "/Movies/GetGenre/",
    dataType: "json",
    cache: false,
    type: 'GET',
    data: {genreName: $("#genre").val() },             
    success: function (result) {
        if(result.Success) {
            alert(result.Genre);
        }
    }
});

另外你的控制器没有返回JSON，修改你的行动，这

Plus your controller isn't returning Json, modify your action to this

public JsonResult GetGenre(string genreName) {
    // do what you need to with genreName here 
    return Json(new { Success = true, Genre = genreName }, JsonRequestBehavior.AllowGet);
}

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