我想通读一个包含很多行的文本文件。 在每一行的开头，我有一个引号之间的字符串，然后是一个昏迷，然后是其余的行，例如：
"CBL003","C3/C5 // <>SdcdUB","",0,1,"PfcdDT_gerergv","",0,"","",0,"","",0,"","",0,"","",0,"","",0,"","",0,"","",0,"","",0,"","",
"CBL004","C3<.<C7 // <>SqsxUB","",0,1,"PDzesdxT_esfdczec","",0,"","",0,"","",0,"","",0,"","",0,"","",0,"","",0,""
我想要的是读取文件，并提取第一行将其放在不同的文本文件中，并用它包含的行的第一个字符串命名。例： 在上面的例子中，我应该有包含以下内容的文本文件CBL003.txt：
"CBL003","C3/C5 // <>SdcdUB","",0,1,"PfcdDT_gerergv","",0,"","",0,"","",0,"","",0,"","",0,"","",0,"","",0,"","",0,"","",0,"","",
和第二个文件文本CBL004.txt包含：
"CBL004","C3<.<C7 // <>SqsxUB","",0,1,"PDzesdxT_esfdczec","",0,"","",0,"","",0,"","",0,"","",0,"","",0,"","",0,""
我已经有一个代码可以读取每一行：
FOR /F "tokens=*" %%a IN (C:\SourceFile.txt) DO (
ECHO %%a
)
但我不知道如何提取每行的第一部分