Access 2003条件格式和具有NULL值的字段不返回NULL
[英]Access 2003 conditional formatting and field with NULL value not return NULL
问题描述
The field is taken from the table and is the source of data for the textbox, in which I want to apply conditional formatting. 
该字段是从表中获取的，并且是文本框的数据源，我要在其中应用条件格式。 Almost always it is NULL . 几乎总是NULL 。 The expression for the conditional formatting: 条件格式的表达式：
Not IsNull ([duedate])
Always returns true, I do not understand why. 总是返回true，我不明白为什么。 Field [duedate] belongs to the parent form. 字段[duedate]属于父表单。
1 个解决方案
解决方案1
0 2015-09-29 05:23:54
我认为您还需要像IsNull一样检查长度
Len(Field) = 0
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