How to take dynamic variable in postgresql function.?

Question

I am using postgresql query to copy data from csv file and insert that data into another table..the query works fine but i want that query to be put into a function so that i can use this function in my c# application. Here is the query which works fine...

copy emp_temp from 'd:\\temp.csv' WITH DELIMITER AS ',' CSV QUOTE AS '"';

here emp_temp is the table and temp.csv is my file.

but

when i am using the above function like

create or replace function CopyToTable(file_path text,table_name text) returns void as
    $body$
        begin
            copy quote_ident(table_name) from  file_path  WITH DELIMITER AS ',' CSV QUOTE AS '"';
        end;
    $body$
    language plpgsql volatile

It shows error like

ERROR: syntax error at or near "file_path"...

From some of the suggestions i also tried using dynamic sql

create or replace function CopyToTable(file_path text,table_name text) returns void as
    $body$
        begin
            execute 'copy quote_ident(' || table_name || ')' || ' from  ' ||
            file_path || 'WITH DELIMITER AS ' || ',' || ' CSV QUOTE AS ' || '"';
        end;
    $body$
    language plpgsql volatile

The function compiles successfully...but when i am giving parameters by running the function

select * from CopyToTable('d:\\temp.csv','emp_temp')

it shows error..

ERROR:  syntax error at or near "d"
LINE 1: copy quote_ident(emp_temp) from  d:\\temp.csvWITH DELIMITER ...
                                     ^