c# - Edit and Update in Dropdownlist mvc4 -

i trying implement edit , update in dropdownlist in application. list of values dropdownlist displayed model. selected value not displayed on dropdownlist. selected value populated list of values in dropdownlist.

my model :

public string state public selectlist regionlist { get; set; } public class region {  public string id { get; set; }  public string name { get; set; }             } 

view

@foreach (var item in model.addresslist) {     @html.dropdownlistfor(model => item.state, new selectlist(model.address.regionlist, "value", "text", model.address.regionlist.selectedvalue))                                                      } 

note :
item.state populated value not displayed
model.address.regionlist populated , displayed

controller

public actionresult editaddress(addresstuple tmodel,int addressid) {     int country;     string customerid = 1;     list<addressmodel> amodel = new list<addressmodel>();     amodel = getaddressinfo(customerid, addressid); // returns selected value dropdown     foreach (var item in amodel)     {         country = item.countryid;     }                 list<region> objregion = new list<region>();     objregion = getregionlist(id); // returns list of values dropdown     selectlist objlistofregiontobind = new selectlist(objregion, "id", "name", 0);     atmodel.regionlist = objlistofregiontobind;      tmodel.address      = atmodel;     tmodel.addresslist  = amodel;     return view(tmodel); } 

for edit in dropdownlist, list of values displayed. selected value not displayed. mistake in code .any suggestions.

edit :

@html.dropdownlistfor(model => model.state, new selectlist(model.regionlist, "id", "name",model.state)) 

this

model => item.state 

is not going work, because hides html helper fact value drop down taken model. correct way implement replacing foreach for:

@for (int i=0; i<model.addresslist.count; i++) {     @html.dropdownlistfor(model => model.addresslist[i].state, new selectlist(model.address.regionlist, "value", "text", model.address.regionlist.selectedvalue))                                      }