Creating Variables By string text-CodePudding

Im looking to create variables by string value, is there smarter way to do it then.

if (str == "DateTime")
{
        DateTime d = new DateTime();
}

else if( str == "TimeSpan")
{
        TimeSpan s = new TimeSpan();
}

extra extra...

I want to write something like that.

object o = new someString() ` when someString is "DateTime" or "TimeSpan"`

Thanks in advanced

CodePudding user response：

You can do something like this which does the same thing but more concisely:

object o = str switch
{
    "DateTime" => new DateTime(),
    "TimeSpan" => new TimeSpan(),
    _ => throw new NotImplementedException()
};

It would be helpful to know what you want to do with the variable afterwards, however, because there might be better ways if you provide context.

CodePudding user response：

May be you can use the dynamic variables, and check the type of it in runtime. eg:

dynamic str ;
        str = DateTime.Now.TimeOfDay;
        if(str.GetType()==typeof(System.TimeSpan))
        {
            Console.Write("hello");
        }

CodePudding user response：

As I Understood ,you basically want to write in one line linq query. right?

var data=str=="DateTime"?xyz:abc;

explanation:

xyz refers when str is equal to datetime

abc refers when not equals.