C# 为什么在MVC中单击“提交”按钮后数据不更改?
当我点击编辑按钮提交数据时,它只是刷新页面。我花了几个小时来解决这个问题。虽然它没有显示任何错误,也没有更改数据库。我无法解决为什么会发生这种情况的问题。 学生示范班C# 为什么在MVC中单击“提交”按钮后数据不更改?,c#,asp.net-mvc,C#,Asp.net Mvc,当我点击编辑按钮提交数据时,它只是刷新页面。我花了几个小时来解决这个问题。虽然它没有显示任何错误,也没有更改数据库。我无法解决为什么会发生这种情况的问题。 学生示范班 public class Student { [Key] public int StudentId { get; set; } [Required] [Display(Name = "Student Name")] public string StudentName { get; set;
public class Student
{
[Key]
public int StudentId { get; set; }
[Required]
[Display(Name = "Student Name")]
public string StudentName { get; set; }
[Required(ErrorMessage = "please enter Email")]
[Remote("IsEmailUnique","Student",ErrorMessage = "This Email is
already Exists")]
public string Email { get; set; }
[Required(ErrorMessage = "please fill up Address")]
[DataType(DataType.MultilineText)]
public string Address { get; set; }
[Required]
public int DepartmentId { get; set; }
public virtual Department Department { get; set; }
[Display(Name = "Date of Birth")]
[Required]
[DataType(dataType:DataType.Date)]
[DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}",
ApplyFormatInEditMode = true)]
public DateTime DoB { get; set; }
[Required]
[Remote("IsPhoneUnique", "Student", ErrorMessage = "This Phone is
already Exists")]
public string Phone { get; set; }
public string Gender { get; set; }
[Required]
[Display(Name = "Reg NO")]
[Remote("IsRegNoUnique", "Student", ErrorMessage = "This RegNo is
already Exists")]
public string RegNo { get; set; }
}
编辑控制器
查看以进行编辑
@model CampusManagementApp.Models.Student
@{
ViewBag.Title=“预订”;
HtmlHelper.ClientValidationEnabled=false;
}
编辑
@使用(Html.BeginForm(“编辑”、“学生”))
{
@Html.AntiForgeryToken()
大学生
@Html.ValidationSummary(true)
@Html.HiddenFor(model=>model.StudentId)
@LabelFor(model=>model.StudentName,新的{@class=“controllabel col-md-2”})
@EditorFor(model=>model.StudentName)
@Html.ValidationMessageFor(model=>model.StudentName)
@Html.LabelFor(model=>model.Email,新的{@class=“controllabel col-md-2”})
@EditorFor(model=>model.Email)
@Html.ValidationMessageFor(model=>model.Email)
@LabelFor(model=>model.Address,新的{@class=“controllabel col-md-2”})
@EditorFor(model=>model.Address)
@Html.ValidationMessageFor(model=>model.Address)
@LabelFor(model=>model.DepartmentId,“DepartmentId”,新的{@class=“controllabel col-md-2”})
@Html.DropDownList(“部门ID”,
(IEnumerable)ViewBag.id,
“选定部门”)
@Html.ValidationMessageFor(model=>model.DepartmentId)
@LabelFor(model=>model.DoB,新的{@class=“controllabel col-md-2”})
@EditorFor(model=>model.DoB)
@Html.ValidationMessageFor(model=>model.DoB)
@LabelFor(model=>model.Phone,新的{@class=“controllabel col-md-2”})
@EditorFor(model=>model.Phone)
@Html.ValidationMessageFor(model=>model.Phone)
@LabelFor(model=>model.Gender,新的{@class=“controllabel col-md-2”})
Male@Html.RadioButton(“性别”、“男性”)
女的
@单选按钮(“性别”、“女性”)
}
@ActionLink(“返回列表”、“索引”)
@节脚本{
@Scripts.Render(“~/bundles/jqueryval”)
}
如何解决该问题?您至少有一个验证错误,因为
RegNo
是必需的,甚至不是视图的一部分
正如评论中所建议的,最好在控制器的这一行上设置断点:
if (ModelState.IsValid)
并检查是否存在任何其他验证错误…我猜是
ModelState。IsValid
返回false
。在您的HttpPost操作方法中放置一个断点并进行验证。无论它们看起来有多像桌面GUI,ASP.Net应用程序仍然是1980 HTML WebFormular。设计师们40年前做出的那些糟糕的决定仍然完全有效。如果您有任何问题,通常最好从了解HTML限制开始。以及您如何处理这些问题。我们需要了解更多代码。具体来说,HTML表单是什么样子,学生模型类是什么样子。否则,很难说问题出在哪里。但很可能ModelState.IsValid会像Shyju所说的那样返回false。请显示您正在发布到服务器的学生模型,并且您的视图(如上所示)不包含学生模型。您的视图也未显示防伪令牌的存在。已添加学生的模型类。在“编辑”视图中添加regNo后,该类仍然有效,谢谢
@model CampusManagementApp.Models.Student
@{
ViewBag.Title = "Make A Booking";
HtmlHelper.ClientValidationEnabled = false;
}
<h2>Edit</h2>
@using (Html.BeginForm("Edit", "Student"))
{
@Html.AntiForgeryToken()
<div class="form-horizontal">
<h4>Student</h4>
<hr />
@Html.ValidationSummary(true)
@Html.HiddenFor(model => model.StudentId)
<div class="form-group">
@Html.LabelFor(model => model.StudentName, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.StudentName)
@Html.ValidationMessageFor(model => model.StudentName)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Email, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Email)
@Html.ValidationMessageFor(model => model.Email)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Address, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Address)
@Html.ValidationMessageFor(model => model.Address)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.DepartmentId, "DepartmentId", new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DropDownList("DepartmentId",
(IEnumerable<SelectListItem>)ViewBag.id,
"Select department")
@Html.ValidationMessageFor(model => model.DepartmentId)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.DoB, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.DoB)
@Html.ValidationMessageFor(model => model.DoB)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Phone, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Phone)
@Html.ValidationMessageFor(model => model.Phone)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Gender, new { @class = "control-label col-md-2" })
<div class="col-md-10">
<b>Male</b>@Html.RadioButton("Gender", "Male")
<b>Female</b>
@Html.RadioButton("Gender", "Female")
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Save" class="btn btn-default" />
</div>
</div>
</div>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>
@section Scripts {
@Scripts.Render("~/bundles/jqueryval")
}
if (ModelState.IsValid)