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How do I convert string to enum?
Use the Enum. IsDefined() method to check if a given string name or integer value is defined in a specified enumeration. Thus, the conversion of String to Enum can be implemented using the Enum. Parse ( ) and Enum.
What is enum parse in C#?
The Parse method in Enum converts the string representation of the name or numeric value of enum constants to an equivalent enumerated object.
Is enum case sensitive C#?
If value is the string representation of the name of an enumeration value, the comparison of value with enumeration names is case-sensitive.
Can we assign string value to enum in C#?
Since C# doesn’t support enum with string value, in this blog post, we’ll look at alternatives and examples that you can use in code to make your life easier. The most popular string enum alternatives are: Use a public static readonly string. Custom Enumeration Class.
How do I convert a string to an enum in Java?
The valueOf() method of the Enum class in java accepts a String value and returns an enum constant of the specified type.
How do you use enums?
You should always use enums when a variable (especially a method parameter) can only take one out of a small set of possible values. Examples would be things like type constants (contract status: “permanent”, “temp”, “apprentice”), or flags (“execute now”, “defer execution”).
What is the default value of enum in C#?
Type | Default value |
---|---|
bool | false |
char | ‘\0’ (U+0000) |
enum | The value produced by the expression (E)0 , where E is the enum identifier. |
struct | The value produced by setting all value-type fields to their default values and all reference-type fields to null . |
What are enum values?
An enum type is a special data type that enables for a variable to be a set of predefined constants. The variable must be equal to one of the values that have been predefined for it. Common examples include compass directions (values of NORTH, SOUTH, EAST, and WEST) and the days of the week.
What is the default value of enum?
The default value for an enum is zero.
How do you use TryParse?
- public static void Main(string[] args)
- {
- string str = “”;
- int intStr; bool intResultTryParse = int.TryParse(str, out intStr);
- if (intResultTryParse == true)
- {
- Console.WriteLine(intStr);
- }
How do you capitalize the first letter in C#?
- In C#, the Toupper() function of the char class converts a character into uppercase. …
- The first character of the string can be indexed as str0] , where str is the original string. …
- Code.
How do I convert a string to enum in typescript?
To convert a string to an enum: Use keyof typeof to cast the string to the type of the enum. Use bracket notation to access the corresponding value of the string in the enum.
How do you create an enum in Java?
An enum can, just like a class , have attributes and methods. The only difference is that enum constants are public , static and final (unchangeable – cannot be overridden). An enum cannot be used to create objects, and it cannot extend other classes (but it can implement interfaces).
What are enum values?
An enum type is a special data type that enables for a variable to be a set of predefined constants. The variable must be equal to one of the values that have been predefined for it. Common examples include compass directions (values of NORTH, SOUTH, EAST, and WEST) and the days of the week.
What is typedef enum in C programming?
A typedef is a mechanism for declaring an alternative name for a type. An enumerated type is an integer type with an associated set of symbolic constants representing the valid values of that type.
Converting a string to an enum – Unity Answers
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how to convert enum into a string? – Unity Forum
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- Summary of article content: Articles about how to convert enum into a string? – Unity Forum I want to return Human as “Human”; so i’m trying to get the name with out giving it a value. Cause each enum can have duplicate values. …
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public enum IdleAnimationType {
Default,
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Converting from String to Enum – Unity Answers
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Parse string value to add to enum List – Unity Answers
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How would you convert string to enum – Unity Answers
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Convert String to Enum in C#
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EnumTryParse() Method
EnumParse() Method
C# Enum Parse Method
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Enum.TryParse Method (System) | Microsoft Docs
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- Most searched keywords: Whether you are looking for Enum.TryParse Method (System) | Microsoft Docs Updating Converts the string representation of the name or numeric value of one or more enumerated constants to an equivalent enumerated object. The return value indicates whether the conversion succeeded.
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Definition
Overloads
TryParse(Type ReadOnlySpanChar Object)
TryParse(Type String Object)
TryParse(Type ReadOnlySpanChar Boolean Object)
TryParse(Type String Boolean Object)
TryParseTEnum(ReadOnlySpanChar TEnum)
TryParseTEnum(String TEnum)
TryParseTEnum(String Boolean TEnum)
TryParseTEnum(ReadOnlySpanChar Boolean TEnum)
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Convert String to Enum in C#
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Convert String to Enum in C#
Here you will learn how to convert the string representation of enum member to enum in C#.
Use the following methods to convert from the string to enum:
Method Description Enum.TryParse() Converts the string representation of one or more enum member names or numeric values to an equivalent enum objects. It returns true if the conversion succeeded and false if failed. It is recommended to use the Enum.TryParse() over Enum.Parse() method. Enum.Parse() Converts the string representation of one or more enum member name or numeric value to an equivalent enum object.
Enum.TryParse() Method
The Enum.TryParse() method converts the string representation of enum member name or numeric value to an equivalent enum object.
Enum.TryParse() Overloads bool TryParse(string value, out object result) bool TryParse(string value, bool ignoreCase, out object result) bool TryParse
(string value, out TEnum result) bool TryParse (string value, bool ignoreCase, out TEnum result) The Enum.TryParse() method returns a boolean to indicate whether the specified string is converted to enum or not. Returns true if the conversion succeeded; otherwise, returns false . The result would be stored in an out parameter result if the conversion succeded. It never throws exceptions if the conversion fails; instead, it returns false .
It is best practice to use the TryParse() method that does not raise exceptions.
The following example shows the conversion of string to enum using TryParse
() method in .NET 4.x and .NET 5: Example: Convert String using Enum.TryParse() Copy enum Week { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday } public static void Main() { var day1 = “Monday”; var day2 = “MONDAY”; var day3 = “SomeOtherDay”; Week week1, week2, week3; if (Enum.TryParse
(day1, out week1)) Console.WriteLine(“{0} converted to {1}”, day1, week1); if (Enum.TryParse (day2, true, out week2)) // ignore cases Console.WriteLine(“{0} converted to {1}”, day2, week2); if (Enum.TryParse (day3, true, out week3)) // ignore cases Console.WriteLine(Console.WriteLine(“{0} converted to {1}”, day3, week3);); else Console.WriteLine(“Conversion Faild for {0}”, day3); } Output:
Monday converted to Monday
MONDAY converted to Monday
Conversion Faild for SomeOtherDay
In the above example, Enum.TryParse() converts the three different strings to enum members. A string MONDAY converted to enum by passing true to ignore cases of the string value. However, Enum.TryParse
(day3, true, out week3) returns false because it cannot find a member named “SomeOtherDay”. So, instead of throwing an exception, returns false boolean value. Enum.Parse() Method
The Enum.Parse() method parse the specified string to enum member. However, it throws an exception if the specified string does not match with any enum member name.
The Enum.Parse() method has the following overloads in .NET Framework 4.x and 5:
Enum.Parse() Overloads Parse(Type enumType, string value) Parse(Type enumType, string value, bool ignoreCase) //.NET 5.0 includes the following overloads: Parse
(string value, bool ignoreCase) Parse (string value) The following example demonstrates the conversion of string to enum using the Parse() method in .NET 4.x:
Example: String to Enum in .NET 4.x Copy enum Week { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday } public static void Main() { string day1 = “Monday”; string day2 = “MONDAY”; string day3 = “SomeOtherDay”; Week weekDay1 = (Week) Enum.Parse(typeof(Week), day1); Week weekDay2 = (Week) Enum.Parse(typeof(Week), day2, true); // ignore case // the following will throw an exception //Week weekDay3 = (Week) Enum.Parse(typeof(Week), day3); Console.WriteLine(weekDay1); Console.WriteLine(weekDay2); }
In the above example, the Enum.Parse() method converts the string value day1 to enumeration type and returns the result as an enumeration object. The boolean parameter specifies if the operation is case-insensitive. Pass true to ignore case to compare string and enum member values.
Use the generic Enum.Parse
() method in .NET 5.x: Example: String to Enum in .NET 5 Copy enum Week { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday } public static void Main() { var day1 = “Monday”; var day2 = “MONDAY”; var day3 = “SomeOtherDay”; Week weekDay1 = Enum.Parse
(day1); Week weekDay2 = Enum.Parse (day2, true); // ignore cases // the following will throw an exception //Week weekDay3 = (Week) Enum.Parse (day3); Console.WriteLine(weekDay1); Console.WriteLine(weekDay2); } Note that the string value must match with any member names; otherwise it will throw an exception. Use the Enum.IsDefined() method to check if a given string name or integer value is defined in a specified enumeration.
Example: Check Member Before Conversion Copy if(Enum.IsDefined(typeof(Week), day3){ Week week3 = Enum.Parse
(day3); } else{ Console.WriteLine(“Wrong Week Day”); } Thus, the conversion of String to Enum can be implemented using the Enum.Parse ( ) and Enum.TryParse () method.
C# Enum Parse Method
C# Enum Parse Method
The Parse method in Enum converts the string representation of the name or numeric value of enum constants to an equivalent enumerated object.
The following is our enumeration.
enum Vehicle { Car, Bus, Truck, Motobike };
Now, use the GetNames() method in a loop to get the enum values. Parse them using the Enum.Parse() method as shown below −
Enum.Parse(typeof(Vehicle)
Example
Live Demo
using System; public class Demo { enum Vehicle { Car, Bus, Truck, Motobike }; public static void Main() { Console.WriteLine(“The enumeration…”); foreach (string v in Enum.GetNames(typeof(Vehicle))) { Console.WriteLine(“{0} = {1:D}”, v, Enum.Parse(typeof(Vehicle), v)); } Console.WriteLine(); } }
Output
The enumeration… Car = 0 Bus = 1 Truck = 2 Motobike = 3
Enum.TryParse Method (System)
TryParse
(String, Boolean, TEnum) Converts the string representation of the name or numeric value of one or more enumerated constants to an equivalent enumerated object. A parameter specifies whether the operation is case-sensitive. The return value indicates whether the conversion succeeded.
public: generic
where TEnum : value class static bool TryParse(System::String ^ value, bool ignoreCase, [Runtime::InteropServices::Out] TEnum % result); public static bool TryParse
(string value, bool ignoreCase, out TEnum result) where TEnum : struct; public static bool TryParse
(string? value, bool ignoreCase, out TEnum result) where TEnum : struct; static member TryParse : string * bool * ‘Enum -> bool (requires ‘Enum : struct)
Public Shared Function TryParse(Of TEnum As Structure) (value As String, ignoreCase As Boolean, ByRef result As TEnum) As Boolean
Type Parameters
TEnum The enumeration type to which to convert value .
Parameters
value String The string representation of the enumeration name or underlying value to convert.
ignoreCase Boolean true to ignore case; false to consider case.
result TEnum When this method returns, contains an object of type TEnum whose value is represented by value if the parse operation succeeds. If the parse operation fails, contains the default value of the underlying type of TEnum . This value need not be a member of the TEnum enumeration. This parameter is passed uninitialized.
Returns
true if the value parameter was converted successfully; otherwise, false .
Exceptions
ArgumentException TEnum is not an enumeration type.
Examples
The following example defines a Colors enumeration, calls the TryParse
(String, Boolean, TEnum) method to convert strings to their corresponding enumeration values, and calls the IsDefined method to ensure that particular integral values are underlying values in the Colors enumeration. The TryParse (String, Boolean, TEnum) method uses case-insensitive comparison when trying to convert the string representations of named constants to their equivalent enumeration values. using System; [Flags] enum Colors { None=0, Red = 1, Green = 2, Blue = 4 }; public class Example { public static void Main() { string[] colorStrings = { “0”, “2”, “8”, “blue”, “Blue”, “Yellow”, “Red, Green” }; foreach (string colorString in colorStrings) { Colors colorValue; if (Enum.TryParse(colorString, true, out colorValue)) if (Enum.IsDefined(typeof(Colors), colorValue) | colorValue.ToString().Contains(“,”)) Console.WriteLine(“Converted ‘{0}’ to {1}.”, colorString, colorValue.ToString()); else Console.WriteLine(“{0} is not an underlying value of the Colors enumeration.”, colorString); else Console.WriteLine(“{0} is not a member of the Colors enumeration.”, colorString); } } } // The example displays the following output: // Converted ‘0’ to None. // Converted ‘2’ to Green. // 8 is not an underlying value of the Colors enumeration. // Converted ‘blue’ to Blue. // Converted ‘Blue’ to Blue. // Yellow is not a member of the Colors enumeration. // Converted ‘Red, Green’ to Red, Green.
open System [
] type Colors = | None = 0 | Red = 1 | Green = 2 | Blue = 4 let colorStrings = [ “0”; “2”; “8”; “blue”; “Blue”; “Yellow”; “Red, Green” ] for colorString in colorStrings do match Enum.TryParse(colorString, true) with | true, colorValue -> if Enum.IsDefined(typeof , colorValue) || (string colorValue).Contains “,” then printfn $”Converted ‘{colorString}’ to {colorValue}.” else printfn $”{colorString} is not an underlying value of the Colors enumeration.” | _ -> printfn $”{colorString} is not a member of the Colors enumeration.” // The example displays the following output: // Converted ‘0’ to None. // Converted ‘2’ to Green. // 8 is not an underlying value of the Colors enumeration. // Converted ‘blue’ to Blue. // Converted ‘Blue’ to Blue. // Yellow is not a member of the Colors enumeration. // Converted ‘Red, Green’ to Red, Green.
Enum Colors As Integer None = 0 Red = 1 Green = 2 Blue = 4 End Enum Module Example Public Sub Main() Dim colorStrings() As String = {“0”, “2”, “8”, “blue”, “Blue”, “Yellow”, “Red, Green”} For Each colorString As String In colorStrings Dim colorValue As Colors If [Enum].TryParse(colorString, True, colorValue) Then If [Enum].IsDefined(GetType(Colors), colorValue) Or colorValue.ToString().Contains(“,”) Then Console.WriteLine(“Converted ‘{0}’ to {1}.”, colorString, colorValue.ToString()) Else Console.WriteLine(“{0} is not an underlying value of the Colors enumeration.”, colorString) End If Else Console.WriteLine(“{0} is not a member of the Colors enumeration.”, colorString) End If Next End Sub End Module ‘ The example displays the following output: ‘ Converted ‘0’ to None. ‘ Converted ‘2’ to Green. ‘ 8 is not an underlying value of the Colors enumeration. ‘ Converted ‘blue’ to Blue. ‘ Converted ‘Blue’ to Blue. ‘ Yellow is not a member of the Colors enumeration. ‘ Converted ‘Red, Green’ to Red, Green. Remarks
TryParse
(String, Boolean, TEnum) is identical to the Parse(Type, String, Boolean) method, except that instead of throwing an exception, it returns false if the conversion fails. It eliminates the need for exception handling when parsing the string representation of an enumeration value. The value parameter contains the string representation of an enumeration member’s underlying value or named constant, or a list of named constants or underlying values delimited by commas (,). If value includes multiple named constants or values, one or more blank spaces can precede or follow each value, name, or comma in value . If value is a list, result reflects the value of the specified names or underlying values combined with a bitwise OR operation. If value is the string representation of the name of an enumeration value, the comparison of value with enumeration names depends on the ignoreCase parameter. If true , the comparison is case-insensitive; if false , it is case-sensitive.
If value is a name that does not correspond to a named constant of TEnum , the method returns false . If value is the string representation of an integer that does not represent an underlying value of the TEnum enumeration, the method returns an enumeration member whose underlying value is value converted to an integral type. If this behavior is undesirable, call the IsDefined method to ensure that a particular string representation of an integer is actually a member of TEnum .
See also
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