Question

I have a string “EMP1$0,EMP2$1,EMP3 $1, Emp4$ 0, emp44$1”; these are employee codes separated by coma (,). Each employee code is appended with their statuses (i.e. 1 for active and 0 for inactive and separated with $ sign). Employee code will not contain spaces, but space can be possible between employee code and $. I need to check if an employee code say “EMP4” is present in this string. Which will be best approach?

Any help is highly appreciable.

Edit:

var strResult = from string str in hdnEmpCodes.Value.Split(',') 
                where str.Length > 0 && str.Substring(0, str.IndexOf("$")).Trim() == lnkEmpCode.Text.Trim() 
                select str.ToString(); 

But it is not giving the desired output.

Answer 1

If you start with the following:

var text = "EMP1$0,EMP2$1,EMP3 $1, Emp4$ 0, emp44$1";

Then you can perform this query to extract the “EMP” codes:

var query =
    from x in text.Split(',').Select(_ => _.Trim())
    let y = x.Split('$').Select(_ => _.Trim())
    where y.Any()
    select y.First();

This would give the following result:

It would now be a simple matter of checking if any of the returned values match.

var found = query.Any(x => x.ToUpperInvariant() == "EMP4");

Does this do what you need?