这是我的第一个 MVC3 项目，我认为完成它会更简单一些，但我遇到了很多问题。这似乎是我没有遇到解决方案的一个麻烦。在这里张贴作为最后的手段。
我的问题是，当创建新配方时，成分列表似乎永远不会填充到数据库中。当保存其余数据时，我什至尝试在控制器中硬编码一个列表，但它仍然没有做任何事情。据我所知，数据库中的任何地方都没有成分字段。谁能指出我做错了什么？非常感谢。
模型：
public class Recipe
{
public int ID { get; set; }
[Required]
public string Title { get; set; }
[Required]
[Display(Name = "Type of Meal")]
public int TypeID { get; set; }
[Required]
public string Instructions { get; set; }
[Display(Name = "Submitted By")]
public string UserName { get; set; }
public IList<string> Ingredients { get; set; }
public virtual MealType Type { get; set; }
}
创建视图：
@model final.Models.Recipe
@{
ViewBag.Title = "Recipe Finder - New Recipe";
}
<h2>New Recipe</h2>
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>
<script type="text/javascript">
//adds an ingredient field on the fly
var numIngredients = 0;
function addIngredient() {
$('#ingredientlist').append('<tr><td><input type="text" name="Ingredients[' + numIngredients++ + ']" value="' + $('#AddIngredient').val() + '" readonly="true" tabindex="-1" /></tr></td>');
$('#AddIngredient').val('');
$('#AddIngredient').focus();
}
function onKeyPress(e) {
var keycode;
if (window.event) {
keycode = window.event.keyCode;
}
else if (e) {
keycode = e.which;
}
else {
return true;
}
//for addingredient field, add ingredient and not submit
// else mimic submit
if (keycode == 13) {
if (document.activeElement.id == "AddIngredient") {
addIngredient();
return false;
}
document.getElementById('btnSubmit').click();
}
return true;
}
//intercepts form submit instead of using submit button to disable addingredient textbox
// this prevents the value/field from posting
function preSubmit() {
$('#AddIngredient').attr('disabled', 'true');
document.getElementsByTagName('form')[0].submit();
}
//intercepts users pressing the enter key
if (document.layers) document.captureEvents(Event.KEYPRESS);
document.onkeypress = onKeyPress;
</script>
@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
<fieldset>
<legend>by @User.Identity.Name</legend>
<div class="editor-label">
@Html.LabelFor(model => model.Title)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Title)
@Html.ValidationMessageFor(model => model.Title)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.TypeID, "Type")
</div>
<div class="editor-field">
@Html.DropDownList("TypeID", String.Empty)
@Html.ValidationMessageFor(model => model.TypeID)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Ingredients)
</div>
<div class="editor-field">
@Html.TextBox("AddIngredient")
<input type="button" value="Add Ingredient" onclick="addIngredient()" tabindex="-1" />
<table id="ingredientlist">
</table>
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Instructions)
</div>
<div class="editor-field">
@Html.TextAreaFor(model => model.Instructions, new { rows = "7", cols = "77" })
@Html.ValidationMessageFor(model => model.Instructions)
</div>
@Html.HiddenFor(model => model.UserName)
<p>
<input type="button" value="Submit" onclick="preSubmit()" id="btnSubmit" />
</p>
</fieldset>
}
控制器：
[HttpPost]
public ActionResult Create(Recipe recipe)
{
if (ModelState.IsValid)
{
db.Recipes.Add(recipe);
db.SaveChanges();
return RedirectToAction("Index");
}
ViewBag.TypeID = new SelectList(db.MealTypes, "ID", "Type", recipe.TypeID);
return View(recipe);
}
我可以看到的 POST 字段成功发送了所有信息，如下所示，我不确定问题是什么，或者此时我还没有尝试过。
Title:test recipe
TypeID:2
Ingredients[0]:test0
Ingredients[1]:test1
Ingredients[2]:test2
Ingredients[3]:test3
Instructions:this is a test
UserName:tym