来自 IEnumerable 的 DropDownList [英] DropDownList from IEnumerable
问题描述
我只想要一个由 IEnumerable 填充的简单下拉列表.我有
I just want a simple drop down list that will be populated by an IEnumerable. I have
@model WebApplication4.Models.VENDOR
该模型包含一个 IEnumerable 的 BANK 对象.我希望下拉列表由这些对象的字段 BANK_NAME 填充.我是 MVC 和 .NET 的新手.这似乎是一项简单的任务,我只是不知道该怎么做.
The model contains an IEnumerable of BANK objects. I want the dropdown to be populated by a field of these objects, BANK_NAME. I'm new to MVC and .NET. This seems like an easy task, I just don't know how to do it.
推荐答案
使用特定于您的视图的视图模型,
Using a viewmodel which is specific to your view,
public class CreateVendor
{
public string VendorName {set;get;}
public List<SelectListItem> Banks {set;get;}
public int SelectedBank {set;get;}
}
在你的 GET Action 方法中
And in your GET Action method
public ActionResult Create()
{
var vm = new CreateVendor();
//Hard coded for demo. You may replace with your db entries (see below)
vm.Banks = new List<SelectListItem> {
new SelectListItem { Value="1","Chase bank" },
new SelectListItem { Value="2","PNCbank" },
new SelectListItem { Value="3","BOA" }
};
return View(vm);
}
并且在您的视图中,它是强类型到 CreateVendor
视图模型的,您可以使用 DropDownListFor
辅助方法.
And in your view, which is strongly typed to the CreateVendor
viewmodel, you may use the DropDownListFor
helper method.
@model CreateVendor
@using(Html.BeginForm())
{
<label>Vendor name </label>
<label>Bank</label>
@Html.DropDownListFor(s=>s.SelectedBank,Model.Banks,"Select one")
<input type="submit" />
}
而您的 HttpPost 操作方法将是
And your HttpPost action method will be
[HttpPost]
public ActionResult Create(CreateVendor model)
{
// Read model.VendorName and model.SelectedBank
// var vendor = new Models.Vendor();
// vendor.Name = model.VendorName;
// vendor.BankId= model.SelectedBankId;
// yourDbContext.Vendors.Add(vendor);
// yourDbContext.SaveChanges();
// Redirect to a success action
}
如果您想用表格中的数据替换硬编码的 Banks
数据.将类/属性名称替换为您的实际类/属性名称.
If you want to replace the hardcoded Banks
data with data from your tables. Replace the Class/Property names with your actual class/property names.
var db= new YourDbContext();
vm.Banks = db.Banks.Select(s=> new SelectListItem {
Value=s.BANK_ID.ToString(),
Text=s.BANK_NAME }).ToList();
这篇关于来自 IEnumerable 的 DropDownList的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!