我从这里需要大帮助我是Asp.net MVC 4应用程序开发的新手,实际上当我点击我的提交按钮后,我在数据库中保存我的下拉列表选择值时遇到了问题。
我使用Debug指针来检查HTTP post对象中的值,但是它不包含dropdownlist选择值它总是在一个部门中显示null值我需要一些专家建议来解决这个问题我通过几个例子尝试好几次,但我仍然没有适当的解决方案。
模特课:
public partial class tblEmployee
{
public int EmployeeId { get; set; }
public string Title { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public Nullable<System.DateTime> DateOfBirth { get; set; }
public Nullable<System.DateTime> DateOfJoin { get; set; }
public string Position { get; set; }
public string Office { get; set; }
public string Division { get; set; }
public Nullable<decimal> Salary { get; set; }
public virtual tblDivision Divisions { get; set; }
}
public partial class tblDivision
{
public int value { get; set; }
public string Division { get; set; }
public Nullable<int> SelectId { get; set; }
}
控制器类:
namespace EmpiteHrSystem.Controllers
{
public class EmployeeController : Controller
{
private EmpiteContext db = new EmpiteContext();
public ActionResult Create()
{
ViewBag.DivisionOptions = new SelectList(db.tblDivisions, "value","Division");
return View();
}
//
// POST: /Employee/Create
[HttpPost]
public ActionResult Create(tblEmployee tblemployee)
{
if (ModelState.IsValid)
{
try
{
db.Entry(tblemployee).State = EntityState.Added;
db.tblEmployees.Add(tblemployee);
db.SaveChanges();
}
catch (ArgumentException ae)
{
ModelState.AddModelError("", ae.Message);
}
return RedirectToAction("Index");
}
}
}
}
查看:
@model EmpiteHrSystem.Models.tblEmployee
@{ ViewBag.Title = "Create"; Layout = "~/Views/Shared/_Layout.cshtml";}
@Html.EditorFor(model => model.EmployeeId)
@Html.ValidationMessageFor(model => model.EmployeeId)
@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
@*@Html.EditorFor(model => model.Office)*@
@Html.DropDownList("DivisionOptions")
@Html.ValidationMessageFor(model => model.Division)
@Html.ActionLink("Back to List", "Index")
答案 0 :(得分:0)
您的DivisionOptions
下拉列表未正确绑定到模型,因为它名称错误。当您的下拉列表绑定到 DivisionOptions 时,您的模型正在寻找名称为 Division 的媒体资源。你有几个选择。
使用强类型助手
@ Html.DropDownListFor(x =&gt; x.Division,(SelectList)ViewBag.DivisionOptions)
重命名您的代码并传入SelectList
@ Html.DropDownList(“Division”,(SelectList)ViewBag.DivisionOptions)