C# 操作未将参数传递给索引

在我的控制器中，我有以下代码：

    public ActionResult Index(int? videoId, int languageId = 0)
        {

               //Some code 
        }

然后在我的.chtml页面中，我这样引用它：

@using (Html.BeginForm("Index", "VideoLanguage", FormMethod.Post))
{
     @Html.Hidden("videoId", Model.VideoId)
     @Html.Hidden("videoLanguageId", Model.SelectedLanguage.LanguageId)

    <div>
        @Html.DropDownListFor(model => model.SelectedLanguage.LanguageId, ViewData["LanguageId"] as SelectList)
    </div>
    <div>
          <a href="@Url.Action("Index", "VideoLanguage",new { videoId = Model.VideoId, languageId = Model.SelectedLanguage.LanguageId })" class="linkbutton">Add Language</a>
    </div>

... code keeps going

@使用（Html.BeginForm（“Index”，“VideoLanguage”，FormMethod.Post））
{
@Html.Hidden（“videoId”，Model.videoId）
@隐藏（“videoLanguageId”，Model.SelectedLanguage.LanguageId）
@Html.DropDownListFor（model=>model.SelectedLanguage.LanguageId，ViewData[“LanguageId”]作为SelectList）
…代码一直在运行

因此，当我单击按钮时，从下拉列表中为LanguageId选择的值没有传递。原始值是。

<a href="@Url.Action("Index", "VideoLanguage",new { videoId = Model.VideoId, languageId = Model.SelectedLanguage.LanguageId })" class="linkbutton">Add Language</a>

在页面加载时设置，因此HTML中的值将硬编码。您需要做的是在Javascript中设置超链接参数或使用：

<input type="submit" value="Index" />

请参见尝试以下操作：

@using (Html.BeginForm("Index", "VideoLanguage", FormMethod.Post, new { videoId = Model.VideoId, languageId = Model.SelectedLanguage.LanguageId }))
{
  ....
}

---

您应该将参数传递给@Html.BeginForm助手，然后提交表单

@using (Html.BeginForm("Index", "VideoLanguage", FormMethod.Post, new { videoId = Model.VideoId, languageId = Model.SelectedLanguage.LanguageId }))
{
     @Html.Hidden("videoId", Model.VideoId)
     @Html.Hidden("videoLanguageId", Model.SelectedLanguage.LanguageId)

    <div>
        @Html.DropDownListFor(model => model.SelectedLanguage.LanguageId, ViewData["LanguageId"] as SelectList)
    </div>
    <div>
       <input type="submit" value="Add Language"/>
    </div>

... code keeps going
}

---

你做得不对。你能在这里发布你模型的代码吗？如果你这样做，我会告诉你如何正确地做。这个答案帮助我理解了问题所在。谢谢。

public ActionResult Index()
        {
//Here just get a view
        }

[HttpPost]
public ActionResult Index(int? videoId, int languageId = 0)
        {
 //Here code to save in database
        }