asp.net-mvc-3 – ModelState.AddModelError不显示在我的视图

我有以下视图，其中创建10 ajax.beginform,但我面临的问题是，在创建对象期间发生错误，那么ModelState.AddModelError将不会显示在视图上，虽然我已设置@ Html.ValidationSummary(true)
视图如下

@model Medical.Models.VisitLabResult

@for (int item = 0; item < 10; item++)
{
    <tr id = @item>
    @using (Ajax.BeginForm("Createall","VisitLabResult",new AjaxOptions
    {
        HttpMethod = "Post",UpdateTargetId = item.ToString() + "td",InsertionMode = InsertionMode.Replace,LoadingElementId = "progress2",OnSuccess = string.Format(
            "disableform({0})",Json.Encode(item)),}))
    {  
        @Html.ValidationSummary(true)

        @Html.AntiForgeryToken()
        <td>
            @Html.DropDownList("LabTestID",String.Empty)
            @Html.ValidationMessageFor(model => model.LabTestID)
        </td>
        <td>
            @Html.EditorFor(model => model.Result)
            @Html.ValidationMessageFor(model => model.Result)
        </td>

        <td>
            @Html.EditorFor(model => model.DateTaken)
            @Html.ValidationMessageFor(model => model.DateTaken)
        </td>

        <td>
            @Html.EditorFor(model => model.Comment)
            @Html.ValidationMessageFor(model => model.Comment)
        </td>

        <td>
            <input type="submit" value="Create" />
        </td>

        <td id = @(item.ToString() + "td")>
        </td>
    }
    </tr>
    }
</table>

而我定义ModelState.AddModelError的action方法如下： –

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Createall(VisitLabResult vlr,int visitid = 28)
{
    try
    {
        if (ModelState.IsValid)
        {
            var v = repository.GetVisit(visitid);
            if (!(v.EligabletoStart(User.Identity.Name))){ 
                return View("NotFound"); 
            }
            vlr.VisitID = visitid;
            repository.AddVisitLabResult(vlr);
            repository.Save();

            return Content("Addedd Succsfully");
        }
    }
    catch (dbupdateException)
    {
        JsonRequestBehavior.AllowGet);
        ModelState.AddModelError(string.Empty,"The Same test Type might have been already created,go back to the Visit page to see the avilalbe Lab Tests");
    }
}

所以我可以在我的视图中显示ModelState.AddModelError。

解决方法

我会敦促你改变你的try {} catch(){}

并首先检查是否存在给定id的访问
并且如果这样简单地返回具有添加的模型误差的模型

if (visitExists)
    {
         ModelState.AddModelError("CustomError",go back to the Visit page to see the avilalbe Lab Tests");
         return View(vlr);    
    }
    //Other code here

将您的AddModelError更改为

ModelState.AddModelError("CustomError",go back to the Visit page to see the avilalbe Lab Tests");

在你看来简单地添加一个

@Html.ValidationMessage("CustomError")

然后当你返回你的模型时，错误会显示你放置了@ Html.ValidationMessage …