Question

我有以下视图，它创建了10个ajax.beginform，但我遇到的问题是在创建对象期间发生错误，然后模型中不会显示ModelState.AddModelError我设置了@Html.ValidationSummary(true) 该视图如下所示

@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>

我定义ModelState.AddModelError的action方法如下所示： -

[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");
    }
}

所以我如何在我的视图中显示ModelState.AddModelError。

Answer 1

我会劝你改变你的try{ } catch(){ }

首先检查是否存在对给定id的访问如果是这样，只需返回模型中添加的模型错误

    if (visitExists)
    {
         ModelState.AddModelError("CustomError", "The Same test Type might have been already created,, go back to the Visit page to see the avilalbe Lab Tests");
         return View(vlr);    
    }
    //Other code here

将AddModelError更改为

ModelState.AddModelError("CustomError", "The Same test Type might have been already created,, go back to the Visit page to see the avilalbe Lab Tests");

在您的视图中，只需添加

即可

@Html.ValidationMessage("CustomError")

然后当您返回模型时，错误将显示在您放置@ Html.ValidationMessage ...

的位置

Answer 2

@Html.ValidationSummary(true) 仅显示有关模型属性的错误消息，如果您还要显示添加的消息，则添加

ModelState.AddModelError(
    "CustomError", 
    "The Same test Type might have been already created, go back to the Visit page to see the avilalbe Lab Tests");

你需要设置 @Html.ValidationSummary(false) 如果您需要在输入字段附近显示验证消息，则需要设置@Html.ValidationSummary(true)并按照Syneryx建议的步骤进行操作

Answer 3

您可以在视图中使用ViewData词典访问ModelState数据。

例如：

在行动中：

ModelState.AddModelError("CustomError", "Error 1");
ModelState.AddModelError("CustomError", "Error 2");

并获取“错误1”消息：

ViewData.ModelState["CustomError"].Errors[0].ErrorMessage

我的视图中没有显示ModelState.AddModelError

3 个答案: