TPT question :How to load the txt include the delimiter and quotemark

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TPT question :How to load the txt include the delimiter and quotemark

Hi :

  The txt like cvs , delimter is ','  the values will be in " ", we can'nt change the txt format , can not add '\' in it,here is 3 column

"dddgas",,"a1"

"dg","dd","a2"

"wa,ng","dd","a2"

"wa"ng","dd","a2"

if I set    VARCHAR OpenQuoteMark            ='"'  then 


"dddgas",,"a1"                               ---success

"dg","dd","a2"                                ---success

"wa,ng","dd","a2"                          ---success

"wa"ng","dd","a2"                          ----fail

if I set TrimChar='"'  then 


"dddgas",,"a1"                               ---success

"dg","dd","a2"                                ---success

"wa,ng","dd","a2"                          ---fail

"wa"ng","dd","a2"                          ---success

How can I load all of them ? Thank you !