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Values Of Enum Elements Cannot Be Populated From A Database


I have found the following solution for this problem (link): First I need to create a custom attribute called "StringValue": public class StringValue : System.Attribute { private readonly string _value; public enum color:byte{ yellow = 500, green = 1000, pink = 1300} a) byte value cannot be assigned to enum elements b) enum elements should always take successive values c) enum must We didn't envision needing that attribute, but now we do. Thanks for helping me understand. –tyriker Oct 14 '10 at 17:56 | show 27 more comments up vote 187 down vote Use method Enum.GetName(Type MyEnumType, object enumvariable) as in (Assume Shipper

A B C D Submit Ques: 4 Which of the following is the correct output for the C#.NET code snippet given below? Let's look at performance. Browse other questions tagged java database enums or ask your own question. Not the answer you're looking for?

Enum Color:byte { Yellow = 500, Green = 1000, Pink = 1300 }

C). This is however, why we make models, and why those models employ abstraction so we can understand them. public sealed class AuthenticationMethod { private readonly String name; private readonly int value; public static readonly AuthenticationMethod FORMS = new AuthenticationMethod (1, "FORMS"); public static readonly AuthenticationMethod WINDOWSAUTHENTICATION = new AuthenticationMethod You can extended with Jakub's pattern for quick code lookup by initializing from the type converter into the static methods.

  1. For example, in a relational database model of a warehouse the entity 'Item' may have a field called 'status' with a predefined set of values such as 'sold', 'reserved', 'out of
  2. Correct the output for the C#.NET code given below?
  3. enum elements should always take successive values.
  4. That is dynamic at run time.
  5. My boss asks me to stop writing small functions and do everything in the same loop Can a president win the electoral college and lose the popular vote more hot questions

Simply decorate the enum and then use this code to retrieve it: public static string GetDescription(this object enumerationValue) where T : struct { Type type = enumerationValue.GetType(); if (!type.IsEnum) { throw ENUM columns have noteable gotchas. Not the answer you're looking for? We Can Assign Values Of Any Type To Variables Of Type Object more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

IndiaBIX provides you lots of fully solved C# Programming (Enumerations) questions and answers with Explanation. Choose Correct Statement About Enum Used In C#.net ? After numerous testing this resulted in the best performance and most control over the output. public static string ToSimpleString(this enum) { switch (enum) { case ComplexForms: return "ComplexForms"; break; } } public static string ToFormattedString(this enum) { switch (enum) { case ComplexForms: return "Complex Forms"; break; In our country/continent example, what happens when we need to store something like land area for each continent?

Though lord knows they have their own issues.) In general, if the answers to the above questions suggest that's not going to work, my next step is to create and populate Which Of The Given Options Are True About A String? B: An enum variable cannot have a public access modifier. This is checking the definition of the type and set at run time. –Hogan Jul 10 '15 at 19:03 @chepe What about "Red Tomato" value??? –Clint Eastwood Dec 15 If you have ENUM('red', 'blue', 'black') but need to change it to ENUM('red', 'blue', 'white'), MySQL needs to rebuild your table and look through every record to check for the now-invalid

Choose Correct Statement About Enum Used In C#.net ?

That will be some new guy's problem. MySQL is literally dumb and will even do this when all you did was add a new value to the end of the member list! (It is rumored that appending an Enum Color:byte { Yellow = 500, Green = 1000, Pink = 1300 } Wired up as a pre-build task, it would re-create your enum on every build, or you can run the T4 manually as needed instead. Which Of The Given Data Types Does Not Store A Sign? Answer : Option C Question 14 : Which of the following is the correct output for the C#.NET code snippet given below?

Fully dynamic means that it happens at runtime and therefore error checking will have to occur at runtime. –Olivier Jacot-Descombes Nov 24 '11 at 16:15 add a comment| up vote 10 So, when your company stops selling black widgets, you can add an 'is_discontinued' column to the reference table and flag the old 'black' row. Variables cannot be assigned to enum elements. Changing the member list of ENUM columns is very expensive. What Is The Size Of A Decimal Data Type?

enum is a keyword. Let us discuss. current.GetHashCode() : 0); } public override string ToString() { return current; } } Code looks a bit ugly, but usages of this struct are pretty presentative. java database enums share|improve this question edited Apr 14 '10 at 14:51 Sampson 180k45386473 asked Oct 23 '08 at 14:11 user20298 5602910 1 Why is ordinal() not safe to use?

share|improve this answer answered Apr 27 '09 at 5:28 Pandincus 6,96043258 1 For those who don't know how to run the resulting executable on post-build: 1) Right click the project String Literals Can Contain Any Character Literal Including Escape Sequences Name : Email: View Answer Discuss in Forum Workspace Report

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Have a question? So I decided I wanted an EnumBase class from which most of the functionality is inherited/built-in, leaving me to focus on the content instead of behavior.

He wants the enum values to come from the database and not have to hard-code them. –Pandincus Nov 30 '11 at 15:45 1 Or...lets say I allow someone in my

In this section you can learn and practice C# Programming Questions based on "Enumerations" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, A. 1, 3B. 2, 4C. 2, 5D. 3, 4 Answer: Option C Explanation: No answer description available for this question. How can I claim compensation? Which Of The Following Is An Effective Way To Render A Variable Constant? All Rights Reserved | Copyright | Terms of Use & Privacy Policy Contact us: [email protected] Follow us on twitter!

An enumerator contains white space in its name. Please try the request again. A variable cannot be assigned to an enum element. color.red Answer : Option A Question 15 : Which of the following statements are correct about the C#.NET code snippet given below?

The type-safe-enum pattern is faster. –Rn222 Mar 3 '14 at 22:04 | show 4 more comments 32 Answers 32 active oldest votes 1 2 next up vote 668 down vote accepted Name : Email: View Answer Discuss in Forum Workspace Report 4. A variable cannot be assigned to an enum element. The enum elements must be declared private.

A: An implicit cast is needed to convert from enum type to an integral type. red D). 0 E). Which of the following is the correct output for the C#.NET code snippet given below? For example: gender ENUM('male', 'female') can be changed to: is_male BIT(1).

color.red, color.green, color.blue Answer : Option A Question 7 : An enum that is declared inside a class, struct, namespace or interface is treated as public.

A). Every enum is a value type. 3. By the way, it helps to change the build order of your project so that "EnumeratedTypes" is built first. The member list will contain more than 2 and less than 20 items.

Technical C Programming C++ C# Java Database Networking Read more... In my case I'm loading metadata, including the valid value range from a database; and no, the vendor code does not support passing a collection of any type to the property. That isn't always a concern, but it is something to be aware of. –Joel Coehoorn Jan 8 '09 at 14:49 | show 8 more comments up vote 67 down vote You To practice all features of C# programming language, here is complete set on 1000+ Multiple Choice Questions and Answers on C#. « C# Question & Answers - Maths Class C# Questions

I also tried something with a dictionary and static properties but that wasn't better either. But in theory TypeA == TypeB would be quicker... I had to play with it to figure out how to use it, and realize its benefits. AuthenticationMethod myCurrentSetting = AuthenticationMethod.FORMS; Console.WriteLine(myCurrentSetting); // Prints: FORMS string name = Enum.GetNames(typeof(AuthenticationMethod))[(int)myCurrentSetting-1]; Console.WriteLine(name); // Prints: FORMS Keep in mind though, the second technique assumes you are using ints and your index

System.Web.Compilation.BuildProvider They're used very effectively by SubSonic, you can download the source and see how they use them, you won't need anything half as intricate as what they're doing. I'll start with Jakub's example, but using inheritance and generics: public sealed class AuthenticationMethod : EnumBase { public static readonly AuthenticationMethod FORMS = new AuthenticationMethod(1, "FORMS"); public static readonly AuthenticationMethod