ASP. net mvc DropDownList usage

I. Bind Html. DropDownList data and select default items

1. Create an IEnumerable <SelectListItem> and specify the default option.

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;

<% = Html. DropDownList ("list") %> In the View to bind the data and select the second item.

2. Create an IEnumerable <SelectListItem>.
Specify the default option in the model attribute.

Use 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. Use 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.csdn.net "; 
           
Sel. Text = "CSDN "; 
           
LsSelItem. Add (sel ); 
           
Sel = new
SelectListItem (); 
           
Sel. Value = "http://www.nopchina.com "; 
           
Sel. Text = "NopChina "; 
           
LsSelItem. Add (sel ); 
           
Sel = new
SelectListItem (); 
           
Sel. Value = "http://blog.csdn.net/csdbfans "; 
           
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"]AsSelectList)%>

From http://blog.sina.com.cn/s/blog_69cfe5430100o2me.html