Requirements:
1, how to get the current CSV form the effective number of lines?
2, how to insert data from line 5, 4 rows of data before without cover?

Now processing to the place,
Found that can write data, but every time I write are covered before,

CodePudding user response:

Like a SeekToEnd () function

CodePudding user response:

Has been solved, the way to write wrong,