How to remove the lines that have empty fields?

Question

I have a CSV file with multiple columns, comma ", " separated and numbers of lines.
some lines have empty one or two fields "Columns". How I can identify in a separate file and/or remove those line with one or more empty columns with Awk command.

example

aaaa,bbbb,cccc,dddd,
,bbbb,cccc,dddd,
aaaa,,cccc,dddd,
aaaa,,,dddd,
,,,dddd,

The ", ," means empty columns. I tried this command but it did not work!

awk -F, '$1,4~/^$/' filename 

The expected output should be only :

aaaa, bbbb, cccc, dddd,

Answer 1

Can you just drop any line with two commas that are adjacent or separated only by whitespace, or that are first on the line? Something like:

 [dynamic<1>butlet]tmp $ cat data2
aaaa,bbbb,cccc,dddd,
,bbbb,cccc,dddd,
aaaa,,cccc,dddd,
aaaa,,,dddd,
,,,dddd,

 $ egrep -v ',[ ^I]*,|^[ ^I]*,' data2
aaaa,bbbb,cccc,dddd,

Answer 2

awk -F, '{for(i=1;i<=NF;i++)if($i==""){next}}1' inputfile