MVC Html.DropListFro的用法

DorpDownListFor

1. 直接在页面初始化

@Html.DropDownListFor(model => model.Status, new SelectList(new string[] {"正常", "暂停销售"}))

2.ViewBag传递

@Html.DropDownListFor(model => model.CarCategoryID, (SelectList)ViewBag.CarCategory)

 

DropDownList

ASP.NET MVC DropDownList 用法

一：Html.DropDownList 数据绑定并选定默认项

1.建立IEnumerable<SelectListItem>并在其中指定默认选中项。

List<SelectListItem> items = new List<SelectListItem>();

items.Add(new SelectListItem { Text = "Kirin", Value = "29" }); 

items.Add(new SelectListItem { Text = "Jade", Value = "28", Selected = true}); 

items.Add(new SelectListItem { Text = "Yao", Value = "24"}); 

this.ViewData["list"] = items;

然后在View中<%=Html.DropDownList("list")%>即可绑定数据，且选中第二项。

2.建立IEnumerable<SelectListItem>，在单独的ViewData项或view model的属性中指定默认选中项。

使用SelectList。

List<SelectListItem> items = new List<SelectListItem>(); 

items.Add(new SelectListItem { Text = "Kirin", Value = "29" }); 

items.Add(new SelectListItem { Text = "Jade", Value = "28"}); 

items.Add(new SelectListItem { Text = "Yao", Value = "24"}); 

this.ViewData["list"] = items; 

this.ViewData["selected"] = 24;

3.使用SelectList。

var users = GetUsers(); 

var selectList = new SelectList(users, "Age", "Name", "24"); 

this.ViewData["list"] = selectList; 

<%=Html.DropDownList("list")%>

4.

List<SelectListItem> lsSelItem = new List<SelectListItem>(); 
SelectListItem sel = new SelectListItem(); 
sel.Value = "http://www.cnblogs.com/star2012"; 
sel.Text = "CSDN"; 
lsSelItem.Add(sel); 
sel = new SelectListItem(); 
sel.Value = "http://www.cnblogs.com/star2012"; 
sel.Text = "NopChina"; 
lsSelItem.Add(sel); 
sel = new SelectListItem(); 
sel.Value = "http://www.cnblogs.com/star2012"; 
sel.Text = "Csdbfans BLOG"; 
lsSelItem.Add(sel); 
SelectList ddlSelData = new SelectList(lsSelItem.AsEnumerable(), "Value", "Text", "http://www.cnblogs.com"); 
ViewData["ddlTestData"] = ddlSelData; 

<%=Html.DropDownList("ddlTest",ViewData["ddlTestData"] as SelectList) %>