asp.net-mvc-3 – 绑定到视图模型的MVC3 Razor – TextBoxFor()

我的视图在html表中显示一系列行.行按数据库中的排序顺序排序. html表中的一列是一个允许用户修改此排名顺序的文本框.表格底部有一个更新提交按钮,允许用户保存此新订单.我遇到的问题是排名顺序正确更新到数据库,但是当控制器返回到视图时,所有数据都在屏幕上正确更新,但文本框中的值不会更新.

Order   |  Data     
================================================
10      |  Item 1
20      |  Item 2
30      |  Item 3

Lets say the user makes the following changes
Order   |  Data
================================================
50      |  Item 1
20      |  Item 2
10      |  Item 3

Now User hits update and what is rendered is:

Order   |  Data
================================================
50      |  Item 3
20      |  Item 2
10      |  Item 1

(Note data was sorted correctly but values of TextBoxFor did not update)

我的观点代码

@using (Html.BeginForm("UpdateRanks","MyController")) {
    <table cellpadding="0" cellspacing="0" width="100%">
    @for (int i = 0; i < Model.DbSelections.Count; i++) {
       var item = Model.DbSelections[i];
       <tr>
        <td>
            @Html.TextBoxFor(m => m.DbSelections[i].Rank,new { @class = "NarrowTextBox" })
        </td>
        <td>
            @Model.DbSelections[i].Rank (works!),@item.ItemName<br />
        </td>
       </tr>
    }
    <input type="submit" value="Update" name="updateaction"  class="StandardButton"/>
</table>
}

控制器代码：

[HttpPost]
[MultiButton(MatchFormKey = "updateaction",MatchFormValue = "Update")]
public ActionResult UpdateRanks(MyViewModel model) {

    if (ModelState.IsValid) {

        MyRepository myRepo = new MyRepository();
        <!-- saves updated ranks to database - it works -->
        myRepo.UpdateAutoPicks(...);

        <!-- after saved ranks above,now reload data including ranks from database -->
        <!-- debugging shows that data and ranks and ordering is correct->
        model.DbSelections = myRepo.GetItems();

        return View("Index",model);


    } else {
        <!-- blah -->
    }

    return View("Index",model);
}