Question

我有一个典型的Create Action，它是由MVC 4中的脚手架生成的。没什么特别的。通常我通过以下URL /RecipeLines/Create到达此页面，当我创建该特定记录时，我有一个下拉列表，如果已发送，我已更改为接收recipeID：

    <div class="editor-label">
        @Html.LabelFor(model => model.RecipeID, "Recipe")
    </div>
    <div class="editor-field">
        @Html.DropDownList("RecipeID", (SelectList)ViewBag.RecipeID, string.Empty)
        @Html.ValidationMessageFor(model => model.RecipeID)
    </div>

我想要做的是通过传递一个如下所示的recipeID链接到“创建”页面：

/RecipeLines/Create/2

我已编辑@Html.DropDownList以接受参数，HOPEFULLY选择正确的RecipeID，或者如果链接到没有查询字符串

/RecipeLines/Create

然后它没有选定的值。

这是我的创建行动。

    // GET: /RecipeLines/Create

    public ActionResult Create(int? recipeID)
    {
        ViewBag.MeasurementID = new SelectList(db.Measurements, "MeasurementID", "MeasurementEn");
        ViewBag.RecipeID = new SelectList(db.Recipes, "RecipeID", "RecipeNameEn", recipeID);
        ViewBag.IngredientID = new SelectList(db.Ingredients, "IngredientID", "IngredientNameEn");
                return View();
    }

My 2 @ Html.ActionLink（s）如下所示：

    //Coming from the Recipe Page        
    @Html.ActionLink("+", "Create", "RecipeLines", new { recipeID = recipe.RecipeID }, null);

    //Coming from the RecipeLines/Index page
    @Html.ActionLink("Create New", "Create")

THIS PROBLEM HAS BEEN SOLVED AND THE ABOVE CODE NOW WORKS

Answer 1

尝试以下代码：

制作行动

public ActionResult Create(int? recipeId)
{
    ViewBag.RecipeID = new SelectList(db.Recipes, "RecipeID", "RecipeNameEn",recipeId);

     //
    return View();
 }

查看

@Html.DropDownList("RecipeID", (SelectList)ViewBag.RecipeID,string.Empty)

<强> ActionLink的

@Html.ActionLink("+", "Create", "RecipeLines", new { recipeId= recipe.RecipeID }, null); @Html.ActionLink("Create New", "Create")

将@ Html.DropDownList的选定值设置为Querystring值

1 个答案: