C Sharp Error Use Of Unassigned Local Variable
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the use of unassigned local variable c# array company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions use of unassigned local variable c# for loop Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million use of unassigned local variable c# string programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Why compile error “Use of unassigned local variable”? up vote 27 down vote favorite 5 My code is the following
Use Of Unassigned Local Variable C# Decimal
int tmpCnt; if (name == "Dude") tmpCnt++; Why is there an error Use of unassigned local variable tmpCnt? I know I didn't explicitly initialize it but due to Default Value Table a value type is initialized with 0 anyways. The reference also reminds me: Remember that using uninitialized variables in C# is not allowed. But why do I have to do it explicitly if it's already done by default? Wouldn't it gain performance if use of unassigned local variable c# struct I wouldn't have to do it? Just wondering... c# .net compiler-construction share|improve this question asked Feb 10 '12 at 18:41 theknut 59521231 Can anyone help me with the headline? Couldn't find a fitting for this one :-S –theknut Feb 10 '12 at 18:44 I have a local struct, never initialized, compiles with no errors. Today I created a different struct, treated identically, got "uninitialized local variable error". All its members were set to a value before use, but I could not first set it to null, since it was 'just' a struct. The struct that compiled contained only ints, bools and strings. The one that gave the error also contained DateTimes. "MyStructType myStruct = new MyStructType();" killed the error. Not the first time I've been bitten by missing something a few levels down. –mickeyf Jun 2 at 19:14 add a comment| 9 Answers 9 active oldest votes up vote 55 down vote accepted Local variables aren't initialized. You have to manually initialize them. Members are initialized, for example: public class X { private int _tmpCnt; // This WILL initialize to zero ... } But local variables are not: public static void SomeMethod() { int tmpCnt; // This is not initialized and must be assigned before used. ... } So your code must be: in
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Use Of Unassigned Local Variable C# List
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Use Of Unassigned Local Variable C# Try Catch
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 code. try { string[] dbnames; int counter = 0; http://stackoverflow.com/questions/9233000/why-compile-error-use-of-unassigned-local-variable 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 assigned size. eg. if i assign it a size of 5, and what http://stackoverflow.com/questions/4815311/error-use-of-unassigned-local-variable-for-string-array 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
here for a quick overview of the site Help Center Detailed http://stackoverflow.com/questions/5710485/what-does-use-of-unassigned-local-variable-mean answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the http://www.codeproject.com/Questions/681282/c-sharp-doubt-clarifying-error company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss use of Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up What does “Use of unassigned local variable” mean? up vote 17 down vote favorite 3 I keep getting this error use of unassigned for annualRate, monthlyCharge, and lateFee..And for the death of me I cannot figure out why. Any help would be greatly appriciated! using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Lab_5___Danny_Curro { class Program { static void Main(string[] args) { string firstName; string lastName; int accNumber; string creditPlan; double balance; string status; Boolean late = false; double lateFee; double monthlyCharge; double annualRate; double netBalance; Console.Write("Enter First Name: "); firstName = Console.ReadLine(); Console.Write("Enter Last Name: "); lastName = Console.ReadLine(); Console.Write("Enter Account Number: "); accNumber = Convert.ToInt32(Console.ReadLine()); Console.Write("Enter Credit Card Plan Number[Blank Will Enter Plan 0]: "); creditPlan = Console.ReadLine(); Console.Write("Enter Balance: "); balance = Convert.ToDouble(Console.ReadLine()); Console.Write("Is This Account Late?: "); status = Console.ReadLine().Trim().ToLower(); if (creditPlan == "0") { annualRate = 0.35; //35% lateFee = 0.0; monthlyCharge = balance * (annualRate * (1 / 12)); return; } if (creditPlan == "1") { annualRate = 0.30; /
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