有关视图状态

Question

好吧我有ViewState["AddressID"]这ViewState["AddressID1"]都存储AddressIDs ..Now如果我想要的东西，如： -

if its ViewState["AddressID"]  
{ 
    call method 1 
} 

if its ViewState["AddressID1"]  
{ 
    call method 2 
} 

现在我该怎样检查其ViewState["AddressID"]或ViewState["AddressID1"]？

Answer 1

string addressId = ViewState["AddressID"] as string; 
string addressId1 = ViewState["AddressID1"] as string; 
if (!string.IsNullOrEmpty(addressId)) 
{ 
    method1(addressId); 
} 
else if (!string.IsNullOrEmpty(addressId1)) 
{ 
    method2(addressId1); 
} 

Answer 2

如果ViewState键不具有值是零，那么：

if (ViewState["AddressID"] != null) 
    Method1(ViewState["AddressID"] as string); 
else 
    Method2(ViewState["AddressID1"] as string);