销售订单：增加 判断单据是否存在的方法

duhe

2023-11-16 1f04dee5f7849d8c0506c9ace925bec768539ea3

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<?xml version='1.0' encoding='utf-8'?>
<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
  <Profiles />
  <Settings />
</SettingsFile>