主题：如何判断某列是否是表达式列

参考代码

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)
Msgbox( pi.getvalue(dc,Nothing))