The application variable in ASP.net(c#).

Question

I have a problem with the application state in Asp.net. I need a list of Strings that i would use in different forms in the same application. Here I add the list:

Application.Add("users", new List<String>());

In a new form I try to add a string to the list, but I get NullReferenceException in the second line of the code below.

 List<String> ls=(List<String>) Application.Get("users");
            ls.Add(TextBox4.Text);

Please add some more code, like where EXACTLY do you add the list to the Application object — Blachshma, Nov 07 '12 at 08:36

score 3 · Accepted Answer · edited Nov 07 '12 at 10:34

3

In the first slot of code the string is empty because of {new List<String>()}. You need to add the string in the list. Only after that, call the Application variable in another form to avoid the NullReferenceException Exception.

edited Nov 07 '12 at 10:34

manas

397
6
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answered Nov 07 '12 at 10:09

Santosh

44
1

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Correct, need to add { } after the constructor parenthesis. – Devraj Gadhavi Nov 07 '12 at 10:39

The application variable in ASP.net(c#).

1 Answers1