使用 powershell 添加一个新行到 csv 文件

Question

I am new to Powershell. I have a directory full of CSV files. I have to read each row in the csv files and take certain actions. If any value in the target column is equal to "XXXXXXX", I need to copy the whole row to a new row with the target field as "NEWVALUE". I don't want to append the input file but create a clone of input and do changes in that. Not sure how to do this with Powershell.

Example and sample input & Output files: Input file can have any number of rows but only 9 columns

Header: column1,column2.....column9

Row1: abc, xyz, 123,,,,,999,done

Row2: kkk,rww, zzz,888,111,,,,done

Row3: xxx,rww, zzz,888,111,,XXXXXXX,,done

Row4: yyy,rww, zzz,888,111,,,,done

Row5: rrr,rww, zzz,888,111,,,,done

Output file should add an additional row with "NEWVALUE". Rest of the fields are same as copied row

Header: column1,column2.....column9

Row1: abc, xyz, 123,,,,,999,done

Row2: kkk,rww, zzz,888,111,,,,done

Row3: xxx,rww, zzz,888,111,,XXXXXXX,,done

Row4: xxx,rww, zzz,888,111,,NEWVALUE,,done

Row5: yyy,rww, zzz,888,111,,,,done

Row6: rrr,rww, zzz,888,111,,,,done

Please let me know if you need more details. Thanks for your time.

Answer 1

i would convert.csv to excel and make a conditional formatting or if function.

if b1 = "xxxx"; b4=b1;blabla

then reconvert to.csv again.