请问如何判断一个Variant类型的变量,值是否为空?(100分)

R

roc

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GUEST, unregistred user!

• 2002-09-17

• #1

rt.

 

M

mk1024

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• 2002-09-17

• #2

uses Variants;
用
function VarIsEmpty(const V: Variant): Boolean;
或
function VarIsNull(const V: Variant): Boolean;

 

R

rockjie

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GUEST, unregistred user!

• 2002-09-17

• #3

v: variant

if v = null then 空值

if v = unassigend then 没赋值

 

憔

憔悴

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GUEST, unregistred user!

• 2002-09-17

• #4

来迟了，噢

 

R

roc

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GUEST, unregistred user!

• 2002-09-17

• #5

多人接受答案了。