C# 存储列表到会话
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Store List to session
提问by Avinash
is it possible to store list to session variable in Asp.net C# ?
是否可以在 Asp.net C# 中将列表存储到会话变量？
回答by Mehrdad Afshari
Yes, you can store any object (I assume you are using ASP.NET with default settings, which is in-process session state):
是的，您可以存储任何对象（我假设您使用具有默认设置的 ASP.NET，即进程内会话状态）：
Session["test"] = myList;
You should cast it back to the original type for use:
您应该将其转换回原始类型以供使用：
var list = (List<int>)Session["test"];
// list.Add(something);
As Richard points out, you should take extra care if you are using other session state modes (e.g. SQL Server) that require objects to be serializable.
正如 Richard 指出的那样，如果您使用其他需要对象可序列化的会话状态模式（例如 SQL Server），您应该格外小心。
回答by Paul McLean
Yes. Which platform are you writing for? ASP.NET C#?
是的。你为哪个平台写作？ASP.NET C#？
List<string> myList = new List<string>();
Session["var"] = myList;
Then, to retrieve:
然后，要检索：
myList = (List<string>)Session["var"];
回答by Don-e Merson
I found in a class file outside the scope of the Page, the above way (which I always have used) didn't work.
I found a workaround in this "context" as follows:
我发现在页面范围之外的类文件中，上述方式（我一直使用）不起作用。
我在这个“上下文”中找到了一个解决方法，如下所示：
HttpContext.Current.Session.Add("currentUser", appUser);
and
和
(AppUser) HttpContext.Current.Session["currentUser"]
Otherwise the compiler was expecting a string when I pointed the object at the session object.
否则，当我将对象指向会话对象时，编译器需要一个字符串。
回答by Alejandro Garcia
Try this..
尝试这个..
List<Cat> cats = new List<Cat>
{
new Cat(){ Name = "Sylvester", Age=8 },
new Cat(){ Name = "Whiskers", Age=2 },
new Cat(){ Name = "Sasha", Age=14 }
};
Session["data"] = cats;
foreach (Cat c in cats)
System.Diagnostics.Debug.WriteLine("Cats>>" + c.Name); //DEBUGGG
回答by Marwah Abdelaal
YourListType ListName = (List<YourListType>)Session["SessionName"];
回答by Ubaid Ur Rehman
public class ProductList
{
public string product{get;set;}
public List<ProductList> objList{get;set;}
}
ProductList obj=new ProductList();
obj.objList=new List<ProductList>();
obj.objList.add(new ProductList{product="Football"});
now assign obj to session
现在将 obj 分配给会话
Session["Product"]=obj;
for retrieval of session.
用于检索会话。
ProductList objLst = (ProductList)Session["Product"];
