主题：[求助]如何判断列是否是表达式？

方法一：判断 http://www.foxtable.com/webhelp/scr/0417.htm

方法二：

Dim dc As DataCol  = DataTables("表C").DataCols("c")
Dim pi As System.Reflection.PropertyInfo = dc.Gettype.getproperty("IsTemporary",Reflection.BindingFlags.nonpublic Or Reflection.BindingFlags.Instance)
output.show( pi.getvalue(dc,Nothing))