asp.net-mvc2 - 不使用Model的强类型助手?

时间:2011-08-23 16:19:49

标签: asp.net-mvc-2 modelstate strongly-typed-helper

在MVC2中使用强类型助手时,在发布帖子时不会从Model属性中获取输入字段值。这是默认行为吗?

带有强类型助手的

(强类型)视图:

<div class="editor-label">
    <%: Html.LabelFor(model => model.Name) %>
</div>
<div class="editor-field">
    <%: Html.TextBoxFor(model => model.Name) %>
    <%: Html.ValidationMessageFor(model => model.Name) %>
</div>

<div class="editor-label">
    <%: Html.LabelFor(model => model.Price) %>
</div>
<div class="editor-field">
    <%: Html.TextBoxFor(model => model.Price) %>
    <%: Html.ValidationMessageFor(model => model.Price) %>
</div>

控制器操作:/ Product / Edit / 5

    public ActionResult Edit(int id)
    {
        var p = new Product();
        p.Name = "product 1";
        p.Price = "100";
        return View(p);
    }

Html输出:

<div class="editor-label">
    <label for="Name">Name</label>
</div>

<div class="editor-field">
    <input id="Name" name="Name" type="text" value="product 1" />
</div>

<div class="editor-label">
    <label for="Price">Price</label>
</div>
<div class="editor-field">
    <input id="Price" name="Price" type="text" value="100" />
</div>

控制器操作:/ Product / Edit / 5

    [HttpPost]
    public ActionResult Edit(Product p)
    {
        p.Name = "prrrrrrd 2";
        return View(p);

    }

表单发布后的Html输出(下面我希望输入id =“Name”的值为“prrrrrrd 2.强类型帮助器从哪里得到它的值?):

<div class="editor-label">
    <label for="Name">Name</label>
</div>

<div class="editor-field">
    <input id="Name" name="Name" type="text" value="product 1" />
</div>

<div class="editor-label">
    <label for="Price">Price</label>
</div>
<div class="editor-field">
    <input id="Price" name="Price" type="text" value="100" />
</div>

1 个答案:

答案 0 :(得分:4)

  

在MVC2中使用强类型助手时输入字段值   在发布帖子时,不会从Model属性中获取。这是   默认行为?

是的,它们首先来自ModelState,然后来自Model。如果您打算在POST操作中对模型执行某些修改,则需要先从ModelState中删除它们。例如:

[HttpPost]
public ActionResult Edit(Product p)
{
    ModelState.Remove("Name");
    p.Name = "prrrrrrd 2";
    return View(p);
}