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Cannot Assign Null To An Implicitly Typed Local Variable Var

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So you can do something like the following: MyType myVariable and (MyOtherType)myVariable. Why do I never get a mention at work? Can one bake a cake with a cooked egg instead of a raw one? How did early mathematicians make it without Set theory? Source

Try something like: string[] AllBranch_IDs = null; if (radioButton_QP.Checked == true) AllBranch_IDs = dt_branches_global.AsEnumerable().Select(x => x.Field("BusinessSectorID")).ToArray(); else AllBranch_IDs = dt_branches_global.AsEnumerable().Select(x => x.Field("BusinessSectorID").ToString()).ToArray(); share|improve this answer answered Jun 27 '14 at 10:24 var result = ? How small could an animal be before it is consciously aware of the effects of quantum mechanics? asked 6 years ago viewed 11750 times active 3 years ago Related 63Using implicitly typed local variables1Are implicitly-typed variables the way forward (C#)5Implicit typing and TDD9How does implicit typing make code http://stackoverflow.com/questions/24449510/cannot-assign-null-to-an-implicitly-typed-local-variable

Cannot Assign Null To An Implicitly-typed Local Variable C#

Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you! Does a key signature go before or after a bar line? Is "she don't" sometimes considered correct form?

Open a new email: Click the New email button in Outlook. They would need to introduce new delegate types with different combinations of ref, out, params, or just not support those cases. –Jeppe Stig Nielsen Jul 2 '13 at 6:06 Yes, I believe it does. Implicitly Typed Local Variable Must Be Initialized One of those features is implicitly typed variables that allow you to create a local variable by using a newly added var keyword without giving it a specific type.

age = null; // will not compile 4. Cannot Assign Null To An Implicitly-typed Variable One example where var is helpful in this manner is with nested generic types such as those used with group operations. Is it safe to use cheap USB data cables? Reply Rion William...

Even the choice of keyword for type inference is controversial. C# Cannot Assign Void To An Implicitly-typed Variable Please send your feedback at following email address. How is it packed? Creating a table with FIXED length column widths Add-in salt to injury?

Cannot Assign Null To An Implicitly-typed Variable

Your statement on the right hand side of assignment is not returning anything. http://forums.asp.net/t/1906801.aspx?+Cannot+assign+null+to+an+implicitly+typed+local+variable call foreach on v, not on the constructed object, as ForEach returns void and you are then trying to assign void to the variable –Samuel Apr 2 '14 at 14:17 add Cannot Assign Null To An Implicitly-typed Local Variable C# Join them; it only takes a minute: Sign up cannot assign to implicit types local variable using asp.net up vote 4 down vote favorite 1 I have this var result Cannot Assign Null To An Implicitly-typed Local Variable Linq How can I avoid being chastised for a project I inherited which was already buggy, but I was told to add features instead of fixing it?

What exactly are sleeping stalls versus waiting-rooms, for airport layovers? this contact form I changed one method signature and broke 25,000 other classes. asked 3 years ago viewed 46937 times active 2 years ago Visit Chat Linked 24 How to initialize var? I'm not sure what your LoadProc() method returns (likely a DataTable or similar), but you may want to consider setting your rdrKeys value to a strongly-typed version of your return type Cannot Assign Void To An Implicitly-typed Variable

A number of others have been added in subsequent versions. 'var' is an instruction to the C# compiler to infer the type of a local variable from the type of the In this case it is being set as null, which doesn't really have a type and thus throws this error. For example var x = (ref int y) => y = 42;. have a peek here Login using C# Corner In Focus DOWNLOAD: C# Corner Android App Version 0.5.4 Why Developers Should Focus On Communication LEARN: How to become a Microsoft MVP C# Corner

C# Copy // Same as previous example except we use the entire last name as a key. // Query variable is an IEnumerable> var studentQuery3 = from student in students Cannot Assign Void To An Implicitly-typed Local Variable Linq Add-in salt to injury? If there's any doubt about the type of a variable, then Intellisense will resolve it.

class SomeClass { var result = general.GetInformation(int.Parse(ID), F_account, F_Info, Types); } In that case, you can't use var and you would have to use whatever Type GetInformation returns, for example string

Either don't use var or include a cast on the null: var AllBranch_IDs = (string[])null; - either results in telling the compiler what the type is. Can I get a dual entry Schengen visa for tourism purpose for me and my wife? c# var share|improve this question edited Mar 7 '14 at 19:50 Peter Mortensen 10.3k1370107 asked Jul 2 '13 at 4:52 Nikhil Chavan 6961623 marked as duplicate by nawfal, vcsjones, iandotkelly, Selman C# Cannot Assign Null To An Implicitly-typed Variable Join our community for more solutions or to ask questions.

The content you requested has been removed. this website very useful for me. Is adding the ‘tbl’ prefix to table names really a problem? Check This Out And what to do if a parameter had a modifier like ref or params?

Although, if you were previously uncommitted, you may not necessarily agree with my 'sensible middle ground' proposal, I hope this article will at least help you to decide on a policy Some C# developers love it and use it as often as they can; other developers hate it and only use it when they have to. It just means that the compiler determines and assigns the most appropriate type.The var keyword may be used in the following contexts:On local variables (variables declared at method scope) as shown share|improve this answer answered Jun 18 '10 at 1:43 Randolpho 42.7k14104148 add a comment| up vote 0 down vote You can use like below: Because your class is : Getinformation Then

iptables not dropping by IP and port? Start typing the address: … CodeTwo Email Clients Outlook Advertise Here 773 members asked questions and received personalized solutions in the past 7 days. Not the answer you're looking for? share|improve this answer answered Jun 18 '10 at 1:48 Gabe 61.2k594170 thanks for that , as you mentioned: this is wrong without type : var studentDetails = null; but

That will display the method definition. Word for "using technology inappropriately"? We appreciate your feedback. share|improve this answer edited Jul 2 '13 at 5:08 answered Jul 2 '13 at 4:57 user2246674 6,3901320 Thanks for sharing, It is useful information. –Nikhil Chavan Jul 2 '13

more hot questions question feed lang-cs about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Assigning null to it throws it wide open and it has no idea what type the data is so it isn't allowed. Gold Rate/Stock Rate). Not the answer you're looking for?

Connect with top rated Experts 13 Experts available now in Live! In the following query, the type of the query variable is IEnumerable>. How do I reverse this javascript code?