C# Programming :: C# intialization of member variable trouble


	C# intialization of member variable trouble Look at this code: class test { private bool bInitialized = false; private string strTest; public string str2 = ""; private void Init() { if (bInitialized) return; bInitialized = true; strTest = str2; } public test() { strTest = ""; bInitialized = false; } public string StrTest { get { Init(); return strTest; } } public override string ToString() { Init(); return strTest; } } class Program { static void Main(string[] args) { test t = new test(); t.str2 = "AAAA"; Console.WriteLine(t.StrTest); Console.ReadLine(); } } Problem is in overriding ToString() method. Program will execute Init() from ToString() and you will not be able to see that in debuger. You can even change back bInitialized to false in constructor but in next step Init() from ToString() will be called and you will not see that in debuger. Why debuger does not show this call? On Feb 6, 7:48 am, mija@gmail.com wrote: - Hide quoted text - > Look at this code: > class test > { > private bool bInitialized = false; > private string strTest; > public string str2 = ""; > private void Init() > { > if (bInitialized) > return; > bInitialized = true; > strTest = str2; > } > public test() > { > strTest = ""; > bInitialized = false; > } > public string StrTest > { > get > { > Init(); > return strTest; > } > } > public override string ToString() > { > Init(); > return strTest; > }} > class Program > { > static void Main(string[] args) > { > test t = new test(); > t.str2 = "AAAA"; > Console.WriteLine(t.StrTest); > Console.ReadLine(); > } > } > Problem is in overriding ToString() method. Program will execute > Init() from ToString() and you will not be able to see that in > debuger. You can even change back bInitialized to false in constructor > but in next step Init() from ToString() will be called and you will > not see that in debuger. Why debuger does not show this call? Hi, Well, test.ToString() isn't even called so why would you expect to see it in the debugger? Brian -----------------------------------------------Reply----------------------------------------------- that is because your program never calls your overridden implementation of ToString() your main method should be I believe if you want ToString called on the class test: test t = new test(); t.str2 = "AAAA"; Console.WriteLine(t); Console.ReadLine(); Remember the ToString you are overiding is the class implementation NOT the variable implementation. HTH Ollie Riches <mija@gmail.com> wrote in message news:1170769701.242518.251950@q2g2000cwa.googlegroups.com... - Hide quoted text - > Look at this code: > class test > { > private bool bInitialized = false; > private string strTest; > public string str2 = ""; > private void Init() > { > if (bInitialized) > return; > bInitialized = true; > strTest = str2; > } > public test() > { > strTest = ""; > bInitialized = false; > } > public string StrTest > { > get > { > Init(); > return strTest; > } > } > public override string ToString() > { > Init(); > return strTest; > } > } > class Program > { > static void Main(string[] args) > { > test t = new test(); > t.str2 = "AAAA"; > Console.WriteLine(t.StrTest); > Console.ReadLine(); > } > } > Problem is in overriding ToString() method. Program will execute > Init() from ToString() and you will not be able to see that in > debuger. You can even change back bInitialized to false in constructor > but in next step Init() from ToString() will be called and you will > not see that in debuger. Why debuger does not show this call? Hi mijalko, not sure, if this is your problem, but you should avoid to call the ToString() from the watch window, at least, if you try to debug the initialization/caching behaviour of your class. Instead, put strTest into the watchwindow. hth Christof <mija@gmail.com> schrieb im Newsbeitrag news:1170769701.242518.251950@q2g2000cwa.googlegroups.com... - Hide quoted text - > Look at this code: > class test > { > private bool bInitialized = false; > private string strTest; > public string str2 = ""; > private void Init() > { > if (bInitialized) > return; > bInitialized = true; > strTest = str2; > } > public test() > { > strTest = ""; > bInitialized = false; > } > public string StrTest > { > get > { > Init(); > return strTest; > } > } > public override string ToString() > { > Init(); > return strTest; > } > } > class Program > { > static void Main(string[] args) > { > test t = new test(); > t.str2 = "AAAA"; > Console.WriteLine(t.StrTest); > Console.ReadLine(); > } > } > Problem is in overriding ToString() method. Program will execute > Init() from ToString() and you will not be able to see that in > debuger. You can even change back bInitialized to false in constructor > but in next step Init() from ToString() will be called and you will > not see that in debuger. Why debuger does not show this call? I found what was the problem. If you put breakpoint at test t = new test(); and debug with step into, and watch variable t in "Autos" window, environment will automaticly call ToString(). But this call you can not stop with breakpoint in ToString method. On Feb 6, 3:23 pm, "Ollie Riches" <ollie_ric@hotmail.com> wrote: - Hide quoted text - > that is because your program never calls your overridden implementation of > ToString() > your main method should be I believe if you want ToString called on the > class test: > test t = new test(); > t.str2 = "AAAA"; > Console.WriteLine(t); > Console.ReadLine(); > Remember the ToString you are overiding is the class implementation NOT thevariableimplementation. > HTH > Ollie Riches > <mija@gmail.com> wrote in message > news:1170769701.242518.251950@q2g2000cwa.googlegroups.com... > > Look at this code: > > class test > > { > > private bool bInitialized = false; > > private string strTest; > > public string str2 = ""; > > private void Init() > > { > > if (bInitialized) > > return; > > bInitialized = true; > > strTest = str2; > > } > > public test() > > { > > strTest = ""; > > bInitialized = false; > > } > > public string StrTest > > { > > get > > { > > Init(); > > return strTest; > > } > > } > > public override string ToString() > > { > > Init(); > > return strTest; > > } > > } > > class Program > > { > > static void Main(string[] args) > > { > > test t = new test(); > > t.str2 = "AAAA"; > > Console.WriteLine(t.StrTest); > > Console.ReadLine(); > > } > > } > > Problem is in overriding ToString() method. Program will execute > > Init() from ToString() and you will not be able to see that in > > debuger. You can even change back bInitialized to false in constructor > > but in next step Init() from ToString() will be called and you will > > not see that in debuger. Why debuger does not show this call?- Hide quoted text - >