Error 5 Use Of Unassigned Local Variable
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Use Of Unassigned Local Variable String
a minute: Sign up C# error: Use of unassigned local variable up vote 22 down vote favorite 1 I'm not sure why I'm getting this error, but shouldn't this code compile, since I'm already checking to see if queue is getting initialized? public static void Main(String[] args) { Byte maxSize; Queue queue; if(args.Length != 0) { if(Byte.TryParse(args[0], out maxSize)) queue = new use of unassigned local variable array Queue(){MaxSize = maxSize}; else Environment.Exit(0); } else { Environment.Exit(0); } for(Byte j = 0; j < queue.MaxSize; j++) queue.Insert(j); for(Byte j = 0; j < queue.MaxSize; j++) Console.WriteLine(queue.Remove()); } So if queue is not initialized, then the for loops aren't reachable right? Since the program already terminates with Environment.Exit(0)? Hope ya'll can give me some pointers :) Thanks. c# initialization share|improve this question edited Nov 2 '08 at 0:17 Blair Conrad 98.6k17106100 asked Nov 1 '08 at 20:33 jkidv 1,11131212 6 I can't give you any pointers, but I hope you can get a handle on this one. –wprl Nov 1 '08 at 20:40 add a comment| 5 Answers 5 active oldest votes up vote 65 down vote accepted The compiler doesn't know that the Environment.Exit() is going to terminate the program; it just sees you executing a static method on a class. Just initialize queue to null when you declare it. Queue queue = null; share|improve this answer edited Mar 9 '13 at 1:14 Zaid Masud 7,20634369 answered Nov 1 '08 at 20:35 tvanfosson 351k65570700 add a comment| up vo
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Use Of Unassigned Local Variable Datetime
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Use Of Unassigned Local Variable C# For Loop
them; it only takes a minute: Sign up ERROR: use of unassigned local variable (for string array) up vote 4 down vote favorite 1 I am reading connection strings from my App.config file and for that i have following http://stackoverflow.com/questions/256073/c-sharp-error-use-of-unassigned-local-variable code. try { string[] dbnames; int counter = 0; foreach (ConnectionStringSettings connSettings in ConfigurationManager.ConnectionStrings) { dbnames[counter] = connSettings.Name; counter++; } return dbnames; } catch { throw; } this code giving me error use of unassigned local variable for dbnames. i will have multiple connection strings in my App.config. They can be none,1,2 and so on. Depending on the needs. so i cant statically assign the dbname size. Because there can be a scenario if they exceed the value of http://stackoverflow.com/questions/4815311/error-use-of-unassigned-local-variable-for-string-array assigned size. eg. if i assign it a size of 5, and what if i get 6th connection string. and if i have 1, then remaining 4 will be a memory wastage. If i am wrong then let me know. Thanks. c# .net arrays c#-4.0 unassigned-variable share|improve this question edited Jan 27 '11 at 10:53 Cody Gray 145k23276368 asked Jan 27 '11 at 10:43 booota 66841226 3 Fix it with: string[] dbnames = null; Run the code, then understand why it does not work. –leppie Jan 27 '11 at 10:48 1 @leppie: Clever, i've +1'd. Also, one could say: uninitialized variable has no initializer. \o/ –Romain Jan 27 '11 at 10:49 yeah right, i tried null and it was then jumping to the exception 'catch' section –booota Jan 27 '11 at 10:51 Good, first step is understanding the root problem. Now follow the answers below to solved the rest of the problem :) –leppie Jan 27 '11 at 10:53 If I have 3 connection strings in my appSettings tag, how can i determine which one is the default (obviously when i will select one to be taken as default)? –booota Jan 28 '11 at 7:07 add a comment| 4 Answers 4 active oldest votes up vote 8 down vote accepted Use this while initializing the array. string[] dbnames = new string[ConfigurationManager.ConnectionStrings.Count]; OR use List
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ASP.NET Community Standup Forums Help Home/ASP.NET Forums/.NET Languages/C#/what is ----use of unassigned local variable what is ----use of unassigned local variable [Answered]RSS 10 replies Last post Mar 14, 2012 11:47 AM by gerrylowry ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved Threads Support Options Advanced Search Reply amigo 1 Member 55 Points 225 Posts what is ----use of unassigned local variable Mar 12, 2012 02:41 AM|amigo 1|LINK The following code which aims tosort the array shows the following bug at this iteration:- "use of unassigned local variable temp" but temp has already been declared--is'nt it? void Main() { int[] arra = new int[5]{44,33,55,22,11}; int temp; for (int i = 0; i < 5; i++) { //int temp; if (arra[0]> arra[i+1]) temp = arra[0]; arra[0] = arra[i+1]; arra[i+1]= temp; Console.WriteLine(arra); // } } Reply karthicks All-Star 24330 Points 4059 Posts Re: what is ----use of unassigned local variable Mar 12, 2012 02:43 AM|karthicks|LINK it should be initialized like below (give some default value) int temp=0; Thanks, Karthick S Reply dinesh kumar... Member 532 Points 255 Posts Re: what is ----use of unassigned local variable Mar 12, 2012 02:45 AM|dinesh kumar nayak|LINK Set temp to some value when declaring it. Thanks & Regards Jai Jagannath Reply rakeshreddym Member 151 Points 73 Posts Re: what is ----use of unassigned local variable Mar 12, 2012 02:50 AM|rakeshreddym|LINK Hi, If you declare a variable without assigning , it may take junk values. Good programming is intialize with some value then there will be no problem(defects). Reply gerrylowry Star 14297 Points 5882 Posts Re: what is ----use of unassigned local variable Mar 12, 2012 02:52 AM|gerrylowry|LINK @ amigo 1 annoying ... yes, imho ... but it's the way the c# compiler behaves ... imho, it does not always appear to make sense ... examples: http://dotnetdud.blogspot.com/2008/08/use-of-unassigned-local-variable-name.html http://msdn.microsoft.com/en-us/library/4y7h161d.aspx"Compiler Error CS0165" "The C# compiler does not allow the use of uninitialized variables. If the compiler detects the use of a variable that might not have been initialized, it generates compiler error CS0165" g