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我想从html页面上的dropdownList中获取参数并将其发送到我的控制器,创建新的Model对象并将其插入到数据库中。ModelState.isValid - false
这是我的控制器(两种方法来创建My_Model):
public ActionResult Create()
{
IEnumerable<MusicStyle> musicStyleList = db.MusicStyles.ToList();
ViewData["musicStyles"] = new SelectList(musicStyleList);
return View();
}
// POST: Bands/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "id,name,info,appearanceDate,musicStyles")] Band band)
{
IEnumerable<MusicStyle> musicStyleList;
if (ModelState.IsValid)
{
musicStyleList = db.MusicStyles;
ViewData["musicStyles"] = new SelectList(musicStyleList).ToList();
db.Bands.Add(band);
db.SaveChanges();
return RedirectToAction("Index");
}
musicStyleList = db.MusicStyles;
ViewData["musicStyles"] = new SelectList(musicStyleList).ToList();
return View(band);
}
这是我的html页面上下拉列表:
@Html.DropDownList("musicStyles", "select style")
这是我的模型:
public class Band
{
[Required]
public int id { get; set; }
[Required]
[RegularExpression(@"^[a-zA-Z-\s\\\/*_]+$")]
[StringLength(60, MinimumLength = 1)]
public string name { get; set; }
public string info { get; set; }
[Required]
[Display(Name = "Appearance date")]
[DataType(DataType.Date)]
[DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}")]
public DateTime appearanceDate { get; set; }
public List<MusicStyle> musicStyles { get; set; }
public List<Song> songs { get; set; }
public List<Album> albums { get; set; }
}
它有一个列表musicStyles
(引用多对多),我想将选定的元素从dropdownList设置为此模型。但在Create
方法的结果,我有一个null musicStyles
,并且ModelState.isValid == false
尝试添加'@ Html.ValidationSummary(假)'在你看来,看你递交表格后得到的错误消息。 – ekad
@ekad我没有消息 – Ales
阅读此:http://stackoverflow.com/a/1791664/1905949 – ekad