如何在asp.net mvc3中显示错误消息
如何在asp.net mvc3中显示错误消息
提问于 2013-03-13 02:18:18
请帮助我在视图中显示错误消息。我的代码如下-
这是我的视图模型：
public class DepartmentViewModel
{
//public Department Department { get; set; }
public string DepartmentId { get; set; }
[Required]
public string DepartmentName { get; set; }
public string ManagerMemberId { get; set; }
public bool IsActive { get; set; }
public List<Member> Managers { get; set; }
}这是控制器：
public class DepartmentController : Controller
{
//
// GET: /Department/
public ActionResult Index()
{
var adminUserId = (string)Session["UserId"];
var memberId = (string)Session["MemberId"];
List<Department> departments = null;
if (!string.IsNullOrEmpty(adminUserId))
{
departments = new DepartmentManager().GetDepartments(false);
}
else if (!string.IsNullOrEmpty(memberId))
{
var companyId = (int)Session["CompanyId"];
departments = new DepartmentManager().GetDepartments(false, companyId);
}
//var managers = new MemberManager().GetMembersOfManagerCategory(true, );
return View("DepartmentList", departments);
}
public ActionResult Delete(string departmentId)
{
try
{
new DepartmentManager().DeleteDepartment(departmentId);
}
catch (System.Exception exception)
{
ModelState.AddModelError("Error", "Unable to delete department. Try again, and if the problem persists see your system administrator.");
//return RedirectToAction("Index", "Department");
}
return RedirectToAction("Index", "Department");
}
}这是View：
@model IEnumerable<PDCA.Core.EntityClasses.Department>
@{
ViewBag.Title = "Department List";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<div class="container">
@using (Html.BeginForm())
{
<form class="form-horizontal">
<fieldset>
<legend>List of Departments:</legend>
<table border="1" cellspacing="1">
<tr>
<th>
Id
</th>
<th>
Name
</th>
<th>
Company
</th>
<th>
Manager
</th>
<th>
IsActive
</th>
<th>
</th>
</tr>
@foreach (var item in Model)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.DepartmentId)
</td>
<td>
@Html.DisplayFor(modelItem => item.DepartmentName)
</td>
<td>
@Html.DisplayFor(modelItem => item.Company.CompanyName)
</td>
<td>
@Html.DisplayFor(modelItem => item.Manager.MemberName)
</td>
<td>
@Html.DisplayFor(modelItem => item.IsActive)
</td>
<td>
@Html.ActionLink("Edit", "Edit", new { item.DepartmentId }) |
@Html.ActionLink("Delete", "Delete", new { item.DepartmentId })
</td>
</tr>
}
</table>
<p></p>
<p>
@Html.ActionLink("Create New", "Create")
</p>
<p></p>
<p>
@Html.ValidationMessage("Error");
</p>
</fieldset>
</form>
}
在视图中，我放置了@Html.ValidationMessage(" error ")，但错误消息没有显示在那里。
回答 3
Stack Overflow用户
发布于 2013-03-13 02:48:58
首先，您有一个重复的表单
@using (Html.BeginForm())
{
<form class="form-horizontal">@Html.BeginForm会为您处理form标记。
其次，尝试像这样添加@Html.ValidationSummary
@using (Html.BeginForm())
{
@Html.ValidationSummary()
<fieldset>第三，您需要引用正确的脚本文件。通常情况下，这将在布局页面中完成，但这取决于您。
将引用添加到
jquery
jquery.validate.js
jquery.validate.unobtrusive.jCDN可以在here上找到
假设您没有输入DepartmentName，请按submit，您应该会看到错误消息。
请记住，页面的model必须为DepartmentViewModel。在上面的例子中，不是这样的。
Stack Overflow用户
发布于 2013-03-13 02:52:52
你正在重定向，所以模型状态已经消失了。您可以通过tempdata保存它，但我不会这样做(How do I maintain ModelState errors when using RedirectToAction?)。您可以使用特殊字段和一些通知消息来显示错误(例如，toastr)，或者只是停留在相同的视图上，然后就会显示模型状态错误。
public ActionResult Delete(string departmentId)
{
try
{
new DepartmentManager().DeleteDepartment(departmentId);
}
catch (System.Exception exception)
{
ModelState.AddModelError("Error", "Unable to delete department. Try again, and if the problem persists see your system administrator.");
//return RedirectToAction("Index", "Department");
YOU SHOULD ADD MESSAGE TO VIEWDATA HERE, OR RETURN SAME VIEW(make delete POST action also)
}
return RedirectToAction("Index", "Department");
}Stack Overflow用户
发布于 2013-03-13 03:01:31
尝试添加@glosrob建议的验证摘要，如
@using (Html.BeginForm())
{
@Html.ValidationSummary()
...也可以使用ValidationMessageFor，比如
<td>
@Html.DisplayFor(modelItem => item.DepartmentName)
@Html.ValidationMessageFor(v=>v.DepartmentName)
</td>页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/15369011
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