在 C# 类之间传递值

Question

I'm quite new in the wonderful world of C# and I'm not sure how to cope with such a problem.

I have a .NET website on Visual Studio 2008, and I have a main page, main.aspx (with its following main.aspx.cs ) and a game page, game.aspx (also with game.aspx.cs ).

In the main class in main.aspx.cs I have a static variable, private static string _username; and with it, a method called getUsername that simply returns this value.

Now in my game class ( game.aspx.cs ) I have an event handler, saveButton_Click() , and in this function I need the value of _username !

If it helps, a user starts on the main page, and then logs in... the variable _username is saved if the login is valid and then the user clicks a link to go to the game.aspx page!

I've looked into the internal keyword, but I am not sure how to use it in this particular example or even if it's the right thing to do in this example!

Answer 1

To answer your question, you can make a public static property in a separate class.

However, don't .

This model will fail horribly (or worse) when two people use your site at once.

Instead, you should use Session State .

Answer 2

Add this to your main page and game page classes:

protected string UserName {
    get { 
        string retVal=string.Empty;
        if (!string.IsNullOrEmpty(Session["UserName"]))
            retVal=Session["Username"].ToString();
        return retVal;
    }
    set{
        Session["UserName"]=value;
    }
}

and then access the property from your code;

Answer 3

You have to use Sessions to store and access the value in multiple pages:

//To store value in session variable
Session["UserName"] = "UserName"; 

//To access the value in the session variable
String UserName = Session["UserName"];

Check for Details ASP.NET Session State

Answer 4

IMHO, you could use Forms Based Authentication which would then make it very simple to get the user name, via User.Identity.Name .