Generic method which return datatype from string value

Question

I want to create a Method which will return the Data Type based on string parameter.

EX. If I pass.

“Test” → return string

“10” → return int

“10.10” → return decimal

“9245fe4a-d402-451c-b9ed-9c1a04247482” → return GUID.

Thanks

Pasang Tamang · Answer

Hi, For my use I did it like below code. public static Type GetType(string value) { if (int.TryParse(value, out int _)) return typeof(int); else if (double.TryParse(value, out double _)) return typeof(double); else if (bool.TryParse(value, out bool _)) return typeof(bool); else if (decimal.TryParse(value, out decimal _)) return typeof(decimal); else if (long.TryParse(value, out long _)) return typeof(long); else if (short.TryParse(value, out short _)) return typeof(short); else if (Guid.TryParse(value, out Guid _)) return typeof(Guid); else return typeof(string); } I tried with TypeCode typeCode = Type.GetTypeCode(value.GetType()); also but this always gave me the string. Regards, Pasang

Anupam Maiti · Answer

You can try this. public static Type GetDataType(string input) { int intValue; decimal decimalValue; Guid guidValue; if (int.TryParse(input, out intValue)) { return typeof(int); } else if (decimal.TryParse(input, out decimalValue)) { return typeof(decimal); } else if (Guid.TryParse(input, out guidValue)) { return typeof(Guid); } else { return typeof(string); } }

Jignesh Kumar · Answer

Hello Naimish, Simple way to achieve as below, class Program { static void Main(string[] args) { var res = "123".ChangeType ().GetType(); } public static T ChangeType (this object obj) { return (T)Convert.ChangeType(obj, typeof(T)); } }

Rajeesh Menoth · Answer

Hi, A similar question is already available, check this reference : https://stackoverflow.com/questions/8625/generic-type-conversion-from-string

Aravind Govindaraj · Answer

Hi Naimish, please find the below code example for your use case Type GetStaticType (T x) { return typeof(T); } Since its generic input (x) accepts any type of input and returns the datatype.

Naimish Makwana · Answer

Hello Amit In your method we need to specify the type while declaring the variable. I want something like public Type GetType(string value) { //Logic.. to convert value to specific type //EX: value -> 0 -> int // value -> "Hello" -> string // value -> “9245fe4a-d402-451c-b9ed-9c1a04247482” -> GUID return Type; }

Amit Mohanty · Answer

Check this public class MyClass { public T MyMethod (string value) { return (T)TypeDescriptor.GetConverter(typeof(T)).ConvertFromInvariantString(value); } } MyClass myClass = new MyClass(); var result1 = myClass.MyMethod ("5"); var result2 = myClass.MyMethod ("hello"); var result3 = myClass.MyMethod ("10.20"); var result4 = myClass.MyMethod ("8ccf2028-55da-4abe-805b-9f952432e789");

Laxmidhar Sahoo · Answer

Using reflaxtion can get generic type. may help bellow link https://learn.microsoft.com/en-us/dotnet/framework/reflection-and-codedom/how-to-examine-and-instantiate-generic-types-with-reflection

Generic method which return datatype from string value

Answers (8)