XML Query with a variable in WHERE - sql

Question

I have this code that works well. But I want to have a variable to change its value in run time. I want the output xml file in C#.
declare #MySearch nvarchar(50)
set #MySearch='بودان'
SELECT ID, Family
FROM Table_1
where freetext(Family, #MySearch, LANGUAGE 1025)
FOR XML RAW ('Employee'), ROOT ('Employees'), ELEMENTS XSINIL;
EDITED:
I ran this code and got this error:
Null or empty full-text predicate.
I want the output xml file in C#.
declare #MySearch nvarchar(50)
--set #MySearch=N'بودان'
SELECT ID, Family
FROM Table_1
where freetext(Family, #MySearch, LANGUAGE 1025)
FOR XML RAW ('Employee'), ROOT ('Employees'), ELEMENTS XSINIL;

Answer 1

The "N" makes the difference, and you need it twice...
Try this:
DECLARE #v1 VARCHAR(10)='بودان';
DECLARE #v2 VARCHAR(10)=N'بودان';
DECLARE #nv1 NVARCHAR(10)='بودان';
DECLARE #nv2 NVARCHAR(10)=N'بودان';
SELECT #v1,#v2,#nv1,#nv2;
The result
????? ????? ????? بودان
Only the very last attempt will show what you need...
The reason: A normal string SET #v='MyString' is not handled as UNICODE
It is neither enough to declare the variable as NVARCHAR nor is it enough to store a unicode literal like N'SomeText'.
EDIT:
After long disucussion in comments the final sentence to solve the issue was this:
Of course you must be connected with the DB to do this!
What ever you want to with your database, first you need an opened connection.