asp.net-mvc2 - 强类型助手不使用模型?
在 MVC2 中使用强类型助手时,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(下面我期望 id="Name" 的输入值是“prrrrrrd 2. 强类型助手从哪里获取它的值?) :
<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>
When using strongly typed helpers in MVC2 the input field values aren't taken from the Model property when a post is made. Is this default behavior?
(strongly typed) view with strongly typed helpers:
<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>
Controller action for: /Product/Edit/5
public ActionResult Edit(int id)
{
var p = new Product();
p.Name = "product 1";
p.Price = "100";
return View(p);
}
Html output:
<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>
Controller action for: /Product/Edit/5
[HttpPost]
public ActionResult Edit(Product p)
{
p.Name = "prrrrrrd 2";
return View(p);
}
Html output after form post (below I would expect the value of the input with id="Name" to be "prrrrrrd 2. Where does the strongly typed helper get it's value from?):
<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>
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是的,它们首先从 ModelState 中获取,然后从 Model 中获取。如果您打算在 POST 操作中对模型进行一些修改,则需要首先将它们从 ModelState 中删除。例如:
Yes, they are first taken from the ModelState and then from the Model. If you intend to perform some modifications on the model in your POST action you need to remove them from the ModelState first. For example: