目录用python生成指定类型的条形码批量生成多个条形码支持的条码类型本文使用的是Free Spire.Barcode for Python，安装命令：pip install javascriptspire.barcode.free。
LINQ to SQL .Count takes way to much process time and decreases performances. I am doing a recursive loop and for one child (lets call it parent) I have to check the number of children under it to ma
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