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.
The application variable in ASP.net(c#).
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27-11-2021 - |
Frage
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);
Lösung
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